[gnome-control-center] wifi: Add HotSpot QR code support
- From: Robert Ancell <rancell src gnome org>
- To: commits-list gnome org
- Cc:
- Subject: [gnome-control-center] wifi: Add HotSpot QR code support
- Date: Fri, 7 Aug 2020 00:02:04 +0000 (UTC)
commit cc7662e24b3afc942e19ed771f6947e5d6f1050b
Author: Mohammed Sadiq <sadiq sadiqpk org>
Date: Mon Dec 2 14:52:25 2019 +0530
wifi: Add HotSpot QR code support
When wifi hotspots are created generate a QR code
so that supported devices can connect to the hotspot
by simply scanning the QR code image
panels/network/cc-qr-code.c | 197 ++++++++
panels/network/cc-qr-code.h | 43 ++
panels/network/cc-wifi-panel.c | 270 ++++++++++
panels/network/cc-wifi-panel.ui | 57 ++-
panels/network/meson.build | 1 +
panels/network/net-device-wifi.c | 90 +---
panels/network/net-device-wifi.h | 2 +
panels/network/network-wifi.ui | 212 +-------
panels/network/qrcodegen.c | 1009 ++++++++++++++++++++++++++++++++++++++
panels/network/qrcodegen.h | 311 ++++++++++++
10 files changed, 1926 insertions(+), 266 deletions(-)
---
diff --git a/panels/network/cc-qr-code.c b/panels/network/cc-qr-code.c
new file mode 100644
index 000000000..b803011bc
--- /dev/null
+++ b/panels/network/cc-qr-code.c
@@ -0,0 +1,197 @@
+/* -*- mode: c; c-basic-offset: 2; indent-tabs-mode: nil; -*- */
+/* cc-qr-code.c
+ *
+ * Copyright 2019 Purism SPC
+ *
+ * This program is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation, either version 3 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program. If not, see <http://www.gnu.org/licenses/>.
+ *
+ * Author(s):
+ * Mohammed Sadiq <sadiq sadiqpk org>
+ *
+ * SPDX-License-Identifier: GPL-3.0-or-later
+ */
+
+#undef G_LOG_DOMAIN
+#define G_LOG_DOMAIN "cc-qr-code"
+
+#ifdef HAVE_CONFIG_H
+# include "config.h"
+#endif
+
+#include "cc-qr-code.h"
+#include "qrcodegen.c"
+
+/**
+ * SECTION: cc-qr_code
+ * @title: CcQrCode
+ * @short_description: A Simple QR Code wrapper around libqrencode
+ * @include: "cc-qr-code.h"
+ *
+ * Generate a QR image from a given text.
+ */
+
+struct _CcQrCode
+{
+ GObject parent_instance;
+
+ gchar *text;
+ cairo_surface_t *surface;
+ gint size;
+ gint scale;
+};
+
+G_DEFINE_TYPE (CcQrCode, cc_qr_code, G_TYPE_OBJECT)
+
+
+static void
+cc_qr_code_finalize (GObject *object)
+{
+ CcQrCode *self = (CcQrCode *)object;
+
+ g_clear_pointer (&self->surface, cairo_surface_destroy);
+ g_clear_pointer (&self->text, g_free);
+
+ G_OBJECT_CLASS (cc_qr_code_parent_class)->finalize (object);
+}
+
+static void
+cc_qr_code_class_init (CcQrCodeClass *klass)
+{
+ GObjectClass *object_class = G_OBJECT_CLASS (klass);
+
+ object_class->finalize = cc_qr_code_finalize;
+}
+
+static void
+cc_qr_code_init (CcQrCode *self)
+{
+}
+
+CcQrCode *
+cc_qr_code_new (void)
+{
+ return g_object_new (CC_TYPE_QR_CODE, NULL);
+}
+
+gboolean
+cc_qr_code_set_text (CcQrCode *self,
+ const gchar *text)
+{
+ g_return_val_if_fail (CC_IS_QR_CODE (self), FALSE);
+ g_return_val_if_fail (!text || *text, FALSE);
+
+ if (g_strcmp0 (text, self->text) == 0)
+ return FALSE;
+
+ /* Clear cairo surface that is cached */
+ g_clear_pointer (&self->surface, cairo_surface_destroy);
+ g_free (self->text);
+ self->text = g_strdup (text);
+
+ return TRUE;
+}
+
+static void
+cc_cairo_fill_pixel (cairo_t *cr,
+ int x,
+ int y,
+ int padding,
+ int scale)
+{
+ cairo_rectangle (cr,
+ x * scale + padding,
+ y * scale + padding,
+ scale, scale);
+ cairo_fill (cr);
+}
+
+cairo_surface_t *
+cc_qr_code_get_surface (CcQrCode *self,
+ gint size,
+ gint scale)
+{
+ uint8_t qr_code[qrcodegen_BUFFER_LEN_FOR_VERSION (qrcodegen_VERSION_MAX)];
+ uint8_t temp_buf[qrcodegen_BUFFER_LEN_FOR_VERSION (qrcodegen_VERSION_MAX)];
+ cairo_t *cr;
+ gint pixel_size, padding, qr_size;
+ gboolean success = FALSE;
+
+ g_return_val_if_fail (CC_IS_QR_CODE (self), NULL);
+ g_return_val_if_fail (size > 0, NULL);
+ g_return_val_if_fail (scale > 0, NULL);
+
+ if (!self->text || !*self->text)
+ {
+ g_warn_if_reached ();
+ cc_qr_code_set_text (self, "invalid text");
+ }
+
+ if (self->surface &&
+ self->size == size &&
+ self->scale == scale)
+ return self->surface;
+
+ self->size = size;
+ self->scale = scale;
+ g_clear_pointer (&self->surface, cairo_surface_destroy);
+
+ success = qrcodegen_encodeText (self->text,
+ temp_buf,
+ qr_code,
+ qrcodegen_Ecc_LOW,
+ qrcodegen_VERSION_MIN,
+ qrcodegen_VERSION_MAX,
+ qrcodegen_Mask_AUTO,
+ FALSE);
+
+ if (!success)
+ return NULL;
+
+ self->surface = cairo_image_surface_create (CAIRO_FORMAT_RGB24, size * scale, size * scale);
+ cairo_surface_set_device_scale (self->surface, scale, scale);
+ cr = cairo_create (self->surface);
+ cairo_set_antialias (cr, CAIRO_ANTIALIAS_NONE);
+
+ /* Draw white background */
+ cairo_set_source_rgba (cr, 1, 1, 1, 1);
+ cairo_rectangle (cr, 0, 0, size * scale, size * scale);
+ cairo_fill (cr);
+
+ qr_size = qrcodegen_getSize(qr_code);
+ pixel_size = MAX (1, size / (qr_size));
+ padding = (size - qr_size * pixel_size) / 2;
+
+ /* If subpixel size is big and margin is pretty small,
+ * increase the margin */
+ if (pixel_size > 4 && padding < 12)
+ {
+ pixel_size--;
+ padding = (size - qr_size * pixel_size) / 2;
+ }
+
+ /* Now draw the black QR code pixels */
+ cairo_set_source_rgba (cr, 0, 0, 0, 1);
+ for (int row = 0; row < qr_size; row++)
+ {
+ for (int column = 0; column < qr_size; column++)
+ {
+ if (qrcodegen_getModule (qr_code, row, column))
+ cc_cairo_fill_pixel (cr, column, row, padding, pixel_size);
+ }
+ }
+
+ cairo_destroy (cr);
+
+ return self->surface;
+}
diff --git a/panels/network/cc-qr-code.h b/panels/network/cc-qr-code.h
new file mode 100644
index 000000000..9965b0f37
--- /dev/null
+++ b/panels/network/cc-qr-code.h
@@ -0,0 +1,43 @@
+/* -*- mode: c; c-basic-offset: 2; indent-tabs-mode: nil; -*- */
+/* cc-qr-code.h
+ *
+ * Copyright 2019 Purism SPC
+ *
+ * This program is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation, either version 3 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program. If not, see <http://www.gnu.org/licenses/>.
+ *
+ * Author(s):
+ * Mohammed Sadiq <sadiq sadiqpk org>
+ *
+ * SPDX-License-Identifier: GPL-3.0-or-later
+ */
+
+#pragma once
+
+#include <glib-object.h>
+#include <cairo.h>
+
+G_BEGIN_DECLS
+
+#define CC_TYPE_QR_CODE (cc_qr_code_get_type ())
+
+G_DECLARE_FINAL_TYPE (CcQrCode, cc_qr_code, CC, QR_CODE, GObject)
+
+CcQrCode *cc_qr_code_new (void);
+gboolean cc_qr_code_set_text (CcQrCode *self,
+ const gchar *text);
+cairo_surface_t *cc_qr_code_get_surface (CcQrCode *self,
+ gint size,
+ gint scale);
+
+G_END_DECLS
diff --git a/panels/network/cc-wifi-panel.c b/panels/network/cc-wifi-panel.c
index 1c958621d..8608a7fe2 100644
--- a/panels/network/cc-wifi-panel.c
+++ b/panels/network/cc-wifi-panel.c
@@ -19,8 +19,10 @@
#include "cc-network-resources.h"
#include "cc-wifi-panel.h"
+#include "cc-qr-code.h"
#include "net-device-wifi.h"
#include "network-dialogs.h"
+#include "panel-common.h"
#include "shell/cc-application.h"
#include "shell/cc-debug.h"
@@ -29,6 +31,8 @@
#include <glib/gi18n.h>
#include <NetworkManager.h>
+#define QR_IMAGE_SIZE 180
+
typedef enum
{
OPERATION_NULL,
@@ -50,9 +54,13 @@ struct _CcWifiPanel
/* Main widgets */
GtkStack *center_stack;
GtkStack *header_stack;
+ GtkBox *hotspot_box;
+ GtkLabel *list_label;
GtkStack *main_stack;
GtkWidget *spinner;
GtkStack *stack;
+ GtkImage *wifi_qr_image;
+ CcQrCode *qr_code;
NMClient *client;
@@ -141,6 +149,225 @@ cc_wifi_panel_static_init_func (void)
/* Auxiliary methods */
+static gchar *
+escape_string (const gchar *str,
+ gboolean quote)
+{
+ GString *string;
+ const char *next;
+
+ if (!str)
+ return NULL;
+
+ string = g_string_new ("");
+ if (quote)
+ g_string_append_c (string, '"');
+
+ while ((next = strpbrk (str, "\\;,:\"")))
+ {
+ g_string_append_len (string, str, next - str);
+ g_string_append_c (string, '\\');
+ g_string_append_c (string, *next);
+ str = next + 1;
+ }
+
+ g_string_append (string, str);
+ if (quote)
+ g_string_append_c (string, '"');
+
+ return g_string_free (string, FALSE);
+}
+
+static const gchar *
+get_connection_security_type (NMConnection *c)
+{
+ NMSettingWirelessSecurity *setting;
+ const char *key_mgmt;
+
+ g_return_val_if_fail (c, "nopass");
+
+ setting = nm_connection_get_setting_wireless_security (c);
+
+ if (!setting)
+ return "nopass";
+
+ key_mgmt = nm_setting_wireless_security_get_key_mgmt (setting);
+
+ /* No IEEE 802.1x */
+ if (g_strcmp0 (key_mgmt, "none") == 0)
+ return "WEP";
+
+ if (g_strcmp0 (key_mgmt, "wpa-none") == 0 ||
+ g_strcmp0 (key_mgmt, "wpa-psk") == 0)
+ return "WPA";
+
+ return "nopass";
+}
+
+static gchar *
+get_wifi_password (NMConnection *c)
+{
+ NMSettingWirelessSecurity *setting;
+ g_autoptr(GVariant) secrets = NULL;
+ g_autoptr(GError) error = NULL;
+ const gchar *sec_type, *password;
+ gint wep_index;
+
+ g_assert (NM_IS_REMOTE_CONNECTION (c));
+
+ sec_type = get_connection_security_type (c);
+ setting = nm_connection_get_setting_wireless_security (c);
+
+ if (g_str_equal (sec_type, "nopass"))
+ return NULL;
+
+ secrets = nm_remote_connection_get_secrets (NM_REMOTE_CONNECTION (c),
+ NM_SETTING_WIRELESS_SECURITY_SETTING_NAME,
+ NULL, &error);
+ if (!error)
+ nm_connection_update_secrets (c,
+ NM_SETTING_WIRELESS_SECURITY_SETTING_NAME,
+ secrets, &error);
+ if (error)
+ {
+ g_warning ("Error: %s", error->message);
+ return NULL;
+ }
+
+ if (g_str_equal (sec_type, "WEP"))
+ {
+ wep_index = nm_setting_wireless_security_get_wep_tx_keyidx (setting);
+ password = nm_setting_wireless_security_get_wep_key (setting, wep_index);
+ }
+ else
+ {
+ password = nm_setting_wireless_security_get_psk (setting);
+ }
+
+ return escape_string (password, FALSE);
+}
+
+/* Generate a string representing the hotspot @connection
+ * An example generated text:
+ * WIFI:S:hotspot;T:WPA;P:my-valid-pass;H:true;
+ * Where,
+ * S = ssid, T = security, P = password, H = hidden (Optional)
+ *
+ * See https://github.com/zxing/zxing/wiki/Barcode-Contents#wi-fi-network-config-android-ios-11
+ */
+static gchar *
+get_qr_string_for_hotspot (NMClient *nm_client,
+ NMConnection *c)
+{
+ NMSettingWireless *setting;
+ g_autofree char *ssid_text = NULL;
+ g_autofree char *escaped_ssid = NULL;
+ g_autofree char *password_str = NULL;
+ GString *string;
+ GBytes *ssid;
+ gboolean hidden;
+
+ g_assert (NM_IS_CLIENT (nm_client));
+ g_assert (NM_IS_REMOTE_CONNECTION (c));
+
+ setting = nm_connection_get_setting_wireless (c);
+ ssid = nm_setting_wireless_get_ssid (setting);
+
+ if (!ssid)
+ return NULL;
+
+ string = g_string_new ("WIFI:S:");
+
+ /* SSID */
+ ssid_text = nm_utils_ssid_to_utf8 (g_bytes_get_data (ssid, NULL),
+ g_bytes_get_size (ssid));
+ escaped_ssid = escape_string (ssid_text, FALSE);
+ g_string_append (string, escaped_ssid);
+ g_string_append_c (string, ';');
+
+ /* Security type */
+ g_string_append (string, "T:");
+ g_string_append (string, get_connection_security_type (c));
+ g_string_append_c (string, ';');
+
+ /* Password */
+ g_string_append (string, "P:");
+ password_str = get_wifi_password (c);
+ if (password_str)
+ g_string_append (string, password_str);
+ g_string_append_c (string, ';');
+
+ /* WiFi Hidden */
+ hidden = nm_setting_wireless_get_hidden (setting);
+ if (hidden)
+ g_string_append (string, "H:true");
+ g_string_append_c (string, ';');
+
+ return g_string_free (string, FALSE);
+}
+
+static NMConnection *
+wifi_device_get_hotspot (CcWifiPanel *self,
+ NMDevice *device)
+{
+ NMSettingIPConfig *ip4_setting;
+ NMConnection *c;
+
+ g_assert (CC_IS_WIFI_PANEL (self));
+ g_assert (NM_IS_DEVICE (device));
+
+ if (nm_device_get_active_connection (device) == NULL)
+ return NULL;
+
+ c = net_device_get_find_connection (self->client, device);
+ if (c == NULL)
+ return NULL;
+
+ ip4_setting = nm_connection_get_setting_ip4_config (c);
+ if (g_strcmp0 (nm_setting_ip_config_get_method (ip4_setting),
+ NM_SETTING_IP4_CONFIG_METHOD_SHARED) != 0)
+ return NULL;
+
+ return c;
+}
+
+static void
+wifi_panel_update_qr_image_cb (CcWifiPanel *self)
+{
+ NetDeviceWifi *child;
+ NMConnection *hotspot;
+ NMDevice *device;
+
+ g_assert (CC_IS_WIFI_PANEL (self));
+
+ child = NET_DEVICE_WIFI (gtk_stack_get_visible_child (self->stack));
+ device = net_device_wifi_get_device (child);
+ hotspot = wifi_device_get_hotspot (self, device);
+
+ if (hotspot)
+ {
+ g_autofree gchar *str = NULL;
+
+ if (!self->qr_code)
+ self->qr_code = cc_qr_code_new ();
+
+ str = get_qr_string_for_hotspot (self->client, hotspot);
+ if (cc_qr_code_set_text (self->qr_code, str))
+ {
+ cairo_surface_t *surface;
+ gint scale;
+
+ scale = gtk_widget_get_scale_factor (GTK_WIDGET (self->wifi_qr_image));
+ surface = cc_qr_code_get_surface (self->qr_code, QR_IMAGE_SIZE, scale);
+ gtk_image_set_from_surface (self->wifi_qr_image, surface);
+ }
+ }
+
+ gtk_widget_set_visible (GTK_WIDGET (self->hotspot_box), hotspot != NULL);
+ gtk_widget_set_opacity (GTK_WIDGET (self->list_label), hotspot == NULL);
+ gtk_widget_set_opacity (GTK_WIDGET (self->spinner), hotspot == NULL);
+}
+
static void
add_wifi_device (CcWifiPanel *self,
NMDevice *device)
@@ -168,6 +395,10 @@ add_wifi_device (CcWifiPanel *self,
gtk_stack_add_titled (self->stack, GTK_WIDGET (net_device),
nm_device_get_udi (device),
nm_device_get_description (device));
+ g_signal_connect_object (device, "state-changed",
+ G_CALLBACK (wifi_panel_update_qr_image_cb),
+ self,
+ G_CONNECT_SWAPPED);
}
static void
@@ -593,6 +824,8 @@ on_stack_visible_child_changed_cb (GtkStack *stack,
const gchar *visible_device_id = NULL;
guint i;
+ wifi_panel_update_qr_image_cb (self);
+
/* Remove previous bindings */
g_clear_pointer (&self->spinner_binding, g_binding_unbind);
@@ -613,6 +846,39 @@ on_stack_visible_child_changed_cb (GtkStack *stack,
}
}
+static void
+hotspot_stop_clicked_cb (CcWifiPanel *self)
+{
+ GtkWidget *dialog;
+ GtkWidget *window;
+ int response;
+
+ g_assert (CC_IS_WIFI_PANEL (self));
+
+ window = gtk_widget_get_toplevel (GTK_WIDGET (self));
+ dialog = gtk_message_dialog_new (GTK_WINDOW (window),
+ GTK_DIALOG_MODAL | GTK_DIALOG_DESTROY_WITH_PARENT,
+ GTK_MESSAGE_OTHER,
+ GTK_BUTTONS_NONE,
+ _("Stop hotspot and disconnect any users?"));
+ gtk_dialog_add_buttons (GTK_DIALOG (dialog),
+ _("_Cancel"), GTK_RESPONSE_CANCEL,
+ _("_Stop Hotspot"), GTK_RESPONSE_OK,
+ NULL);
+
+ response = gtk_dialog_run (GTK_DIALOG (dialog));
+
+ if (response == GTK_RESPONSE_OK)
+ {
+ NetDeviceWifi *child;
+
+ child = NET_DEVICE_WIFI (gtk_stack_get_visible_child (self->stack));
+ net_device_wifi_turn_off_hotspot (child);
+ }
+
+ gtk_widget_destroy (dialog);
+}
+
/* Overrides */
static const gchar *
@@ -744,14 +1010,18 @@ cc_wifi_panel_class_init (CcWifiPanelClass *klass)
gtk_widget_class_bind_template_child (widget_class, CcWifiPanel, center_stack);
gtk_widget_class_bind_template_child (widget_class, CcWifiPanel, header_stack);
+ gtk_widget_class_bind_template_child (widget_class, CcWifiPanel, hotspot_box);
+ gtk_widget_class_bind_template_child (widget_class, CcWifiPanel, list_label);
gtk_widget_class_bind_template_child (widget_class, CcWifiPanel, main_stack);
gtk_widget_class_bind_template_child (widget_class, CcWifiPanel, rfkill_switch);
gtk_widget_class_bind_template_child (widget_class, CcWifiPanel, rfkill_widget);
gtk_widget_class_bind_template_child (widget_class, CcWifiPanel, spinner);
gtk_widget_class_bind_template_child (widget_class, CcWifiPanel, stack);
+ gtk_widget_class_bind_template_child (widget_class, CcWifiPanel, wifi_qr_image);
gtk_widget_class_bind_template_callback (widget_class, rfkill_switch_notify_activate_cb);
gtk_widget_class_bind_template_callback (widget_class, on_stack_visible_child_changed_cb);
+ gtk_widget_class_bind_template_callback (widget_class, hotspot_stop_clicked_cb);
g_object_class_override_property (object_class, PROP_PARAMETERS, "parameters");
}
diff --git a/panels/network/cc-wifi-panel.ui b/panels/network/cc-wifi-panel.ui
index a6ba995c4..783012728 100644
--- a/panels/network/cc-wifi-panel.ui
+++ b/panels/network/cc-wifi-panel.ui
@@ -211,6 +211,60 @@
<property name="can-focus">False</property>
<property name="orientation">vertical</property>
+ <child>
+ <object class="GtkBox" id="hotspot_box">
+ <property name="visible">True</property>
+ <property name="orientation">vertical</property>
+
+ <!-- Hotspot QR code -->
+ <child>
+ <object class="GtkImage" id="wifi_qr_image">
+ <property name="visible">True</property>
+ <property name="halign">center</property>
+ <property name="width-request">180</property>
+ <property name="height-request">180</property>
+ <style>
+ <class name="frame"/>
+ </style>
+ </object>
+ </child>
+
+ <child>
+ <object class="GtkLabel">
+ <property name="visible">True</property>
+ <property name="margin-top">12</property>
+ <property name="label" translatable="yes">Wi-Fi Hotspot Active</property>
+ <attributes>
+ <attribute name="weight" value="bold" />
+ <attribute name="scale" value="1.8" />
+ </attributes>
+ </object>
+ </child>
+
+ <child>
+ <object class="GtkLabel">
+ <property name="visible">True</property>
+ <property name="label" translatable="yes">Mobile devices can scan the QR
code to connect.</property>
+ </object>
+ </child>
+
+ <child>
+ <object class="GtkButton">
+ <property name="visible">True</property>
+ <property name="can-focus">True</property>
+ <property name="halign">center</property>
+ <property name="margin-top">12</property>
+ <property name="label" translatable="yes">Turn Off Hotspot…</property>
+ <signal name="clicked" handler="hotspot_stop_clicked_cb" swapped="yes"/>
+ <style>
+ <class name="destructive-action"/>
+ </style>
+ </object>
+ </child>
+
+ </object>
+ </child>
+
<!-- Visible Networks label & spinner -->
<child>
<object class="GtkBox">
@@ -220,7 +274,7 @@
<property name="spacing">6</property>
<property name="margin_bottom">12</property>
<child>
- <object class="GtkLabel">
+ <object class="GtkLabel" id="list_label">
<property name="visible">True</property>
<property name="label" translatable="yes">Visible Networks</property>
<property name="xalign">0.0</property>
@@ -257,6 +311,7 @@
</child>
</object>
</child>
+
</object>
<packing>
<property name="name">wifi-connections</property>
diff --git a/panels/network/meson.build b/panels/network/meson.build
index 439b2b847..d7cd6e419 100644
--- a/panels/network/meson.build
+++ b/panels/network/meson.build
@@ -36,6 +36,7 @@ foreach name: panel_names
endforeach
sources = files(
+ 'cc-qr-code.c',
'cc-network-panel.c',
'cc-wifi-connection-row.c',
'cc-wifi-connection-list.c',
diff --git a/panels/network/net-device-wifi.c b/panels/network/net-device-wifi.c
index ea1874fa2..ded4753c8 100644
--- a/panels/network/net-device-wifi.c
+++ b/panels/network/net-device-wifi.c
@@ -34,6 +34,7 @@
#include "hostname-helper.h"
#include "network-dialogs.h"
#include "panel-common.h"
+#include "cc-list-row.h"
#include "connection-editor/net-connection-editor.h"
#include "net-device-wifi.h"
@@ -59,13 +60,9 @@ struct _NetDeviceWifi
GtkSwitch *device_off_switch;
GtkBox *header_box;
GtkBox *hotspot_box;
- GtkLabel *hotspot_network_name_heading_label;
- GtkLabel *hotspot_network_name_label;
- GtkSwitch *hotspot_off_switch;
- GtkLabel *hotspot_security_heading_label;
- GtkLabel *hotspot_security_key_heading_label;
- GtkLabel *hotspot_security_key_label;
- GtkLabel *hotspot_security_label;
+ CcListRow *hotspot_name_row;
+ CcListRow *hotspot_security_row;
+ CcListRow *hotspot_password_row;
GtkBox *listbox_box;
GtkButton *start_hotspot_button;
GtkLabel *status_label;
@@ -277,17 +274,14 @@ nm_device_wifi_refresh_hotspot (NetDeviceWifi *self)
g_debug ("Refreshing hotspot labels to name: '%s', security key: '%s', security: '%s'",
hotspot_ssid, hotspot_secret, hotspot_security);
- gtk_label_set_label (self->hotspot_network_name_label, hotspot_ssid);
- gtk_widget_set_visible (GTK_WIDGET (self->hotspot_network_name_heading_label), hotspot_ssid != NULL);
- gtk_widget_set_visible (GTK_WIDGET (self->hotspot_network_name_label), hotspot_ssid != NULL);
+ cc_list_row_set_secondary_label (self->hotspot_name_row, hotspot_ssid);
+ gtk_widget_set_visible (GTK_WIDGET (self->hotspot_name_row), hotspot_ssid != NULL);
- gtk_label_set_label (self->hotspot_security_key_label, hotspot_secret);
- gtk_widget_set_visible (GTK_WIDGET (self->hotspot_security_key_heading_label), hotspot_secret !=
NULL);
- gtk_widget_set_visible (GTK_WIDGET (self->hotspot_security_key_label), hotspot_secret != NULL);
+ cc_list_row_set_secondary_label (self->hotspot_password_row, hotspot_secret);
+ gtk_widget_set_visible (GTK_WIDGET (self->hotspot_password_row), hotspot_secret != NULL);
- gtk_label_set_label (self->hotspot_security_label, hotspot_security);
- gtk_widget_set_visible (GTK_WIDGET (self->hotspot_security_heading_label), hotspot_security != NULL);
- gtk_widget_set_visible (GTK_WIDGET (self->hotspot_security_label), hotspot_security != NULL);
+ cc_list_row_set_secondary_label (self->hotspot_security_row, hotspot_security);
+ gtk_widget_set_visible (GTK_WIDGET (self->hotspot_security_row), hotspot_security != NULL);
}
static void
@@ -589,11 +583,6 @@ show_hotspot_ui (NetDeviceWifi *self)
{
/* show hotspot tab */
gtk_stack_set_visible_child (GTK_STACK (self), GTK_WIDGET (self->hotspot_box));
-
- /* force switch to on as this succeeded */
- self->updating_device = TRUE;
- gtk_switch_set_active (self->hotspot_off_switch, TRUE);
- self->updating_device = FALSE;
}
static void
@@ -756,52 +745,12 @@ stop_shared_connection (NetDeviceWifi *self)
if (!found) {
g_warning ("Could not stop hotspot connection as no connection attached to the device could
be found.");
- self->updating_device = TRUE;
- gtk_switch_set_active (self->hotspot_off_switch, TRUE);
- self->updating_device = FALSE;
return;
}
nm_device_wifi_refresh_ui (self);
}
-static void
-stop_hotspot_response_cb (NetDeviceWifi *self, gint response, GtkWidget *dialog)
-{
- if (response == GTK_RESPONSE_OK) {
- stop_shared_connection (self);
- } else {
- self->updating_device = TRUE;
- gtk_switch_set_active (self->hotspot_off_switch, TRUE);
- self->updating_device = FALSE;
- }
- gtk_widget_destroy (dialog);
-}
-
-static void
-hotspot_off_switch_changed_cb (NetDeviceWifi *self)
-{
- GtkWidget *dialog;
- GtkWidget *window;
-
- if (self->updating_device)
- return;
-
- window = gtk_widget_get_toplevel (GTK_WIDGET (self));
- dialog = gtk_message_dialog_new (GTK_WINDOW (window),
- GTK_DIALOG_MODAL | GTK_DIALOG_DESTROY_WITH_PARENT,
- GTK_MESSAGE_OTHER,
- GTK_BUTTONS_NONE,
- _("Stop hotspot and disconnect any users?"));
- gtk_dialog_add_buttons (GTK_DIALOG (dialog),
- _("_Cancel"), GTK_RESPONSE_CANCEL,
- _("_Stop Hotspot"), GTK_RESPONSE_OK,
- NULL);
- g_signal_connect_object (dialog, "response",
- G_CALLBACK (stop_hotspot_response_cb), self, G_CONNECT_SWAPPED);
- gtk_window_present (GTK_WINDOW (dialog));
-}
-
static void
show_wifi_list (NetDeviceWifi *self)
{
@@ -1203,13 +1152,9 @@ net_device_wifi_class_init (NetDeviceWifiClass *klass)
gtk_widget_class_bind_template_child (widget_class, NetDeviceWifi, device_off_switch);
gtk_widget_class_bind_template_child (widget_class, NetDeviceWifi, header_box);
gtk_widget_class_bind_template_child (widget_class, NetDeviceWifi, hotspot_box);
- gtk_widget_class_bind_template_child (widget_class, NetDeviceWifi,
hotspot_network_name_heading_label);
- gtk_widget_class_bind_template_child (widget_class, NetDeviceWifi, hotspot_network_name_label);
- gtk_widget_class_bind_template_child (widget_class, NetDeviceWifi, hotspot_off_switch);
- gtk_widget_class_bind_template_child (widget_class, NetDeviceWifi, hotspot_security_heading_label);
- gtk_widget_class_bind_template_child (widget_class, NetDeviceWifi,
hotspot_security_key_heading_label);
- gtk_widget_class_bind_template_child (widget_class, NetDeviceWifi, hotspot_security_key_label);
- gtk_widget_class_bind_template_child (widget_class, NetDeviceWifi, hotspot_security_label);
+ gtk_widget_class_bind_template_child (widget_class, NetDeviceWifi, hotspot_name_row);
+ gtk_widget_class_bind_template_child (widget_class, NetDeviceWifi, hotspot_security_row);
+ gtk_widget_class_bind_template_child (widget_class, NetDeviceWifi, hotspot_password_row);
gtk_widget_class_bind_template_child (widget_class, NetDeviceWifi, listbox_box);
gtk_widget_class_bind_template_child (widget_class, NetDeviceWifi, start_hotspot_button);
gtk_widget_class_bind_template_child (widget_class, NetDeviceWifi, status_label);
@@ -1218,7 +1163,6 @@ net_device_wifi_class_init (NetDeviceWifiClass *klass)
gtk_widget_class_bind_template_callback (widget_class, connect_hidden_button_clicked_cb);
gtk_widget_class_bind_template_callback (widget_class, device_off_switch_changed_cb);
gtk_widget_class_bind_template_callback (widget_class, history_button_clicked_cb);
- gtk_widget_class_bind_template_callback (widget_class, hotspot_off_switch_changed_cb);
gtk_widget_class_bind_template_callback (widget_class, start_hotspot_button_clicked_cb);
}
@@ -1305,3 +1249,11 @@ net_device_wifi_get_title_widget (NetDeviceWifi *self)
g_return_val_if_fail (NET_IS_DEVICE_WIFI (self), NULL);
return GTK_WIDGET (self->center_box);
}
+
+void
+net_device_wifi_turn_off_hotspot (NetDeviceWifi *self)
+{
+ g_return_if_fail (NET_IS_DEVICE_WIFI (self));
+
+ stop_shared_connection (self);
+}
diff --git a/panels/network/net-device-wifi.h b/panels/network/net-device-wifi.h
index bc4620cea..22866be68 100644
--- a/panels/network/net-device-wifi.h
+++ b/panels/network/net-device-wifi.h
@@ -42,5 +42,7 @@ GtkWidget *net_device_wifi_get_header_widget (NetDeviceWifi *device);
GtkWidget *net_device_wifi_get_title_widget (NetDeviceWifi *device);
+void net_device_wifi_turn_off_hotspot (NetDeviceWifi *self);
+
G_END_DECLS
diff --git a/panels/network/network-wifi.ui b/panels/network/network-wifi.ui
index 3e549b932..b95adcb16 100644
--- a/panels/network/network-wifi.ui
+++ b/panels/network/network-wifi.ui
@@ -7,216 +7,36 @@
<property name="visible">True</property>
<property name="can_focus">False</property>
<property name="orientation">vertical</property>
+ <property name="height-request">140</property>
</object>
</child>
+
+ <!-- Wi-Fi Hotspot deails -->
<child>
- <object class="GtkBox" id="hotspot_box">
+ <object class="GtkListBox" id="hotspot_box">
<property name="visible">True</property>
- <property name="can_focus">False</property>
- <property name="border_width">12</property>
- <property name="orientation">vertical</property>
- <property name="spacing">9</property>
+ <property name="selection-mode">none</property>
<child>
- <object class="GtkBox">
+ <object class="CcListRow" id="hotspot_name_row">
<property name="visible">True</property>
- <property name="can_focus">False</property>
- <child>
- <object class="GtkBox">
- <property name="visible">True</property>
- <property name="can_focus">False</property>
- <property name="halign">start</property>
- <property name="valign">center</property>
- <property name="hexpand">True</property>
- <property name="orientation">vertical</property>
- <property name="spacing">3</property>
- <child>
- <object class="GtkLabel">
- <property name="visible">True</property>
- <property name="can_focus">False</property>
- <property name="xalign">0</property>
- <property name="label" translatable="yes">Wi-Fi Hotspot</property>
- <attributes>
- <attribute name="weight" value="bold"/>
- <attribute name="scale" value="1.2"/>
- </attributes>
- </object>
- <packing>
- <property name="expand">False</property>
- <property name="fill">True</property>
- <property name="position">0</property>
- </packing>
- </child>
- <child>
- <object class="GtkLabel">
- <property name="visible">True</property>
- <property name="can_focus">False</property>
- <property name="xalign">0</property>
- <property name="wrap">True</property>
- <property name="label" translatable="yes">Switch off to connect to a Wi-Fi
network</property>
- </object>
- <packing>
- <property name="expand">False</property>
- <property name="fill">True</property>
- <property name="position">1</property>
- </packing>
- </child>
- </object>
- <packing>
- <property name="expand">False</property>
- <property name="fill">True</property>
- <property name="position">0</property>
- </packing>
- </child>
- <child>
- <object class="GtkSwitch" id="hotspot_off_switch">
- <property name="visible">True</property>
- <property name="can_focus">True</property>
- <property name="halign">end</property>
- <property name="valign">center</property>
- <signal name="notify::active" handler="hotspot_off_switch_changed_cb" object="NetDeviceWifi"
swapped="yes"/>
- </object>
- <packing>
- <property name="expand">False</property>
- <property name="fill">True</property>
- <property name="position">1</property>
- </packing>
- </child>
+ <property name="title" context="Wi-Fi Hotspot" translatable="yes">Network Name</property>
</object>
- <packing>
- <property name="expand">False</property>
- <property name="fill">True</property>
- <property name="position">0</property>
- </packing>
</child>
<child>
- <object class="GtkGrid">
+ <object class="CcListRow" id="hotspot_security_row">
<property name="visible">True</property>
- <property name="can_focus">False</property>
- <property name="halign">center</property>
- <property name="valign">start</property>
- <property name="row_spacing">10</property>
- <property name="column_spacing">6</property>
- <property name="column-homogeneous">True</property>
- <child>
- <object class="GtkLabel" id="hotspot_network_name_heading_label">
- <property name="visible">True</property>
- <property name="can_focus">False</property>
- <property name="xalign">1</property>
- <property name="label" translatable="yes">Network Name</property>
- <property name="mnemonic_widget">hotspot_network_name_label</property>
- <style>
- <class name="dim-label"/>
- </style>
- </object>
- <packing>
- <property name="left_attach">0</property>
- <property name="top_attach">0</property>
- <property name="width">1</property>
- <property name="height">1</property>
- </packing>
- </child>
- <child>
- <object class="GtkLabel" id="hotspot_security_heading_label">
- <property name="visible">True</property>
- <property name="can_focus">False</property>
- <property name="xalign">1</property>
- <property name="label" translatable="yes">Security type</property>
- <property name="mnemonic_widget">hotspot_security_label</property>
- <style>
- <class name="dim-label"/>
- </style>
- </object>
- <packing>
- <property name="left_attach">0</property>
- <property name="top_attach">1</property>
- <property name="width">1</property>
- <property name="height">1</property>
- </packing>
- </child>
- <child>
- <object class="GtkLabel" id="hotspot_network_name_label">
- <property name="visible">True</property>
- <property name="can_focus">False</property>
- <property name="xalign">0</property>
- <property name="label"></property>
- <property name="selectable">True</property>
- <property name="max-width-chars">50</property>
- <property name="ellipsize">end</property>
- </object>
- <packing>
- <property name="left_attach">1</property>
- <property name="top_attach">0</property>
- <property name="width">1</property>
- <property name="height">1</property>
- </packing>
- </child>
- <child>
- <object class="GtkLabel" id="hotspot_security_label">
- <property name="visible">True</property>
- <property name="can_focus">False</property>
- <property name="xalign">0</property>
- <property name="label"></property>
- <property name="selectable">True</property>
- <property name="max-width-chars">50</property>
- <property name="ellipsize">end</property>
- </object>
- <packing>
- <property name="left_attach">1</property>
- <property name="top_attach">1</property>
- <property name="width">1</property>
- <property name="height">1</property>
- </packing>
- </child>
- <child>
- <object class="GtkLabel" id="hotspot_security_key_heading_label">
- <property name="visible">True</property>
- <property name="can_focus">False</property>
- <property name="xalign">1</property>
- <property name="label" context="Wi-Fi passkey" translatable="yes">Password</property>
- <property name="mnemonic_widget">hotspot_security_key_label</property>
- <style>
- <class name="dim-label"/>
- </style>
- </object>
- <packing>
- <property name="left_attach">0</property>
- <property name="top_attach">2</property>
- <property name="width">1</property>
- <property name="height">1</property>
- </packing>
- </child>
- <child>
- <object class="GtkLabel" id="hotspot_security_key_label">
- <property name="visible">True</property>
- <property name="can_focus">False</property>
- <property name="xalign">0</property>
- <property name="label"></property>
- <property name="selectable">True</property>
- <property name="max-width-chars">50</property>
- <property name="ellipsize">end</property>
- <attributes>
- <attribute name="font-desc" value="Monospace"/>
- </attributes>
- </object>
- <packing>
- <property name="left_attach">1</property>
- <property name="top_attach">2</property>
- <property name="width">1</property>
- <property name="height">1</property>
- </packing>
- </child>
+ <property name="title" context="Wi-Fi Hotspot" translatable="yes">Security type</property>
+ </object>
+ </child>
+ <child>
+ <object class="CcListRow" id="hotspot_password_row">
+ <property name="visible">True</property>
+ <property name="title" context="Wi-Fi Hotspot" translatable="yes">Password</property>
</object>
- <packing>
- <property name="expand">True</property>
- <property name="fill">True</property>
- <property name="position">1</property>
- </packing>
</child>
</object>
- <packing>
- <property name="position">1</property>
- </packing>
</child>
+
</template>
<!-- Center widget -->
diff --git a/panels/network/qrcodegen.c b/panels/network/qrcodegen.c
new file mode 100644
index 000000000..7cda9659b
--- /dev/null
+++ b/panels/network/qrcodegen.c
@@ -0,0 +1,1009 @@
+/*
+ * QR Code generator library (C)
+ *
+ * Copyright (c) Project Nayuki. (MIT License)
+ * https://www.nayuki.io/page/qr-code-generator-library
+ *
+ * Permission is hereby granted, free of charge, to any person obtaining a copy of
+ * this software and associated documentation files (the "Software"), to deal in
+ * the Software without restriction, including without limitation the rights to
+ * use, copy, modify, merge, publish, distribute, sublicense, and/or sell copies of
+ * the Software, and to permit persons to whom the Software is furnished to do so,
+ * subject to the following conditions:
+ * - The above copyright notice and this permission notice shall be included in
+ * all copies or substantial portions of the Software.
+ * - The Software is provided "as is", without warranty of any kind, express or
+ * implied, including but not limited to the warranties of merchantability,
+ * fitness for a particular purpose and noninfringement. In no event shall the
+ * authors or copyright holders be liable for any claim, damages or other
+ * liability, whether in an action of contract, tort or otherwise, arising from,
+ * out of or in connection with the Software or the use or other dealings in the
+ * Software.
+ */
+
+#include <assert.h>
+#include <limits.h>
+#include <stdlib.h>
+#include <string.h>
+#include "qrcodegen.h"
+
+#ifndef QRCODEGEN_TEST
+ #define testable static // Keep functions private
+#else
+ #define testable // Expose private functions
+#endif
+
+
+/*---- Forward declarations for private functions ----*/
+
+// Regarding all public and private functions defined in this source file:
+// - They require all pointer/array arguments to be not null unless the array length is zero.
+// - They only read input scalar/array arguments, write to output pointer/array
+// arguments, and return scalar values; they are "pure" functions.
+// - They don't read mutable global variables or write to any global variables.
+// - They don't perform I/O, read the clock, print to console, etc.
+// - They allocate a small and constant amount of stack memory.
+// - They don't allocate or free any memory on the heap.
+// - They don't recurse or mutually recurse. All the code
+// could be inlined into the top-level public functions.
+// - They run in at most quadratic time with respect to input arguments.
+// Most functions run in linear time, and some in constant time.
+// There are no unbounded loops or non-obvious termination conditions.
+// - They are completely thread-safe if the caller does not give the
+// same writable buffer to concurrent calls to these functions.
+
+testable void appendBitsToBuffer(unsigned int val, int numBits, uint8_t buffer[], int *bitLen);
+
+testable void addEccAndInterleave(uint8_t data[], int version, enum qrcodegen_Ecc ecl, uint8_t result[]);
+testable int getNumDataCodewords(int version, enum qrcodegen_Ecc ecl);
+testable int getNumRawDataModules(int ver);
+
+testable void calcReedSolomonGenerator(int degree, uint8_t result[]);
+testable void calcReedSolomonRemainder(const uint8_t data[], int dataLen,
+ const uint8_t generator[], int degree, uint8_t result[]);
+testable uint8_t finiteFieldMultiply(uint8_t x, uint8_t y);
+
+testable void initializeFunctionModules(int version, uint8_t qrcode[]);
+static void drawWhiteFunctionModules(uint8_t qrcode[], int version);
+static void drawFormatBits(enum qrcodegen_Ecc ecl, enum qrcodegen_Mask mask, uint8_t qrcode[]);
+testable int getAlignmentPatternPositions(int version, uint8_t result[7]);
+static void fillRectangle(int left, int top, int width, int height, uint8_t qrcode[]);
+
+static void drawCodewords(const uint8_t data[], int dataLen, uint8_t qrcode[]);
+static void applyMask(const uint8_t functionModules[], uint8_t qrcode[], enum qrcodegen_Mask mask);
+static long getPenaltyScore(const uint8_t qrcode[]);
+static void addRunToHistory(unsigned char run, unsigned char history[7]);
+static bool hasFinderLikePattern(unsigned char runHistory[7]);
+
+testable bool getModule(const uint8_t qrcode[], int x, int y);
+testable void setModule(uint8_t qrcode[], int x, int y, bool isBlack);
+testable void setModuleBounded(uint8_t qrcode[], int x, int y, bool isBlack);
+static bool getBit(int x, int i);
+
+testable int calcSegmentBitLength(enum qrcodegen_Mode mode, size_t numChars);
+testable int getTotalBits(const struct qrcodegen_Segment segs[], size_t len, int version);
+static int numCharCountBits(enum qrcodegen_Mode mode, int version);
+
+
+
+/*---- Private tables of constants ----*/
+
+// The set of all legal characters in alphanumeric mode, where each character
+// value maps to the index in the string. For checking text and encoding segments.
+static const char *ALPHANUMERIC_CHARSET = "0123456789ABCDEFGHIJKLMNOPQRSTUVWXYZ $%*+-./:";
+
+// For generating error correction codes.
+testable const int8_t ECC_CODEWORDS_PER_BLOCK[4][41] = {
+ // Version: (note that index 0 is for padding, and is set to an illegal value)
+ //0, 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20, 21, 22, 23, 24,
25, 26, 27, 28, 29, 30, 31, 32, 33, 34, 35, 36, 37, 38, 39, 40 Error correction level
+ {-1, 7, 10, 15, 20, 26, 18, 20, 24, 30, 18, 20, 24, 26, 30, 22, 24, 28, 30, 28, 28, 28, 28, 30, 30,
26, 28, 30, 30, 30, 30, 30, 30, 30, 30, 30, 30, 30, 30, 30, 30}, // Low
+ {-1, 10, 16, 26, 18, 24, 16, 18, 22, 22, 26, 30, 22, 22, 24, 24, 28, 28, 26, 26, 26, 26, 28, 28, 28,
28, 28, 28, 28, 28, 28, 28, 28, 28, 28, 28, 28, 28, 28, 28, 28}, // Medium
+ {-1, 13, 22, 18, 26, 18, 24, 18, 22, 20, 24, 28, 26, 24, 20, 30, 24, 28, 28, 26, 30, 28, 30, 30, 30,
30, 28, 30, 30, 30, 30, 30, 30, 30, 30, 30, 30, 30, 30, 30, 30}, // Quartile
+ {-1, 17, 28, 22, 16, 22, 28, 26, 26, 24, 28, 24, 28, 22, 24, 24, 30, 28, 28, 26, 28, 30, 24, 30, 30,
30, 30, 30, 30, 30, 30, 30, 30, 30, 30, 30, 30, 30, 30, 30, 30}, // High
+};
+
+#define qrcodegen_REED_SOLOMON_DEGREE_MAX 30 // Based on the table above
+
+// For generating error correction codes.
+testable const int8_t NUM_ERROR_CORRECTION_BLOCKS[4][41] = {
+ // Version: (note that index 0 is for padding, and is set to an illegal value)
+ //0, 1, 2, 3, 4, 5, 6, 7, 8, 9,10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20, 21, 22, 23, 24, 25, 26,
27, 28, 29, 30, 31, 32, 33, 34, 35, 36, 37, 38, 39, 40 Error correction level
+ {-1, 1, 1, 1, 1, 1, 2, 2, 2, 2, 4, 4, 4, 4, 4, 6, 6, 6, 6, 7, 8, 8, 9, 9, 10, 12, 12,
12, 13, 14, 15, 16, 17, 18, 19, 19, 20, 21, 22, 24, 25}, // Low
+ {-1, 1, 1, 1, 2, 2, 4, 4, 4, 5, 5, 5, 8, 9, 9, 10, 10, 11, 13, 14, 16, 17, 17, 18, 20, 21, 23,
25, 26, 28, 29, 31, 33, 35, 37, 38, 40, 43, 45, 47, 49}, // Medium
+ {-1, 1, 1, 2, 2, 4, 4, 6, 6, 8, 8, 8, 10, 12, 16, 12, 17, 16, 18, 21, 20, 23, 23, 25, 27, 29, 34,
34, 35, 38, 40, 43, 45, 48, 51, 53, 56, 59, 62, 65, 68}, // Quartile
+ {-1, 1, 1, 2, 4, 4, 4, 5, 6, 8, 8, 11, 11, 16, 16, 18, 16, 19, 21, 25, 25, 25, 34, 30, 32, 35, 37,
40, 42, 45, 48, 51, 54, 57, 60, 63, 66, 70, 74, 77, 81}, // High
+};
+
+// For automatic mask pattern selection.
+static const int PENALTY_N1 = 3;
+static const int PENALTY_N2 = 3;
+static const int PENALTY_N3 = 40;
+static const int PENALTY_N4 = 10;
+
+
+
+/*---- High-level QR Code encoding functions ----*/
+
+// Public function - see documentation comment in header file.
+bool qrcodegen_encodeText(const char *text, uint8_t tempBuffer[], uint8_t qrcode[],
+ enum qrcodegen_Ecc ecl, int minVersion, int maxVersion, enum qrcodegen_Mask mask, bool
boostEcl) {
+
+ size_t textLen = strlen(text);
+ if (textLen == 0)
+ return qrcodegen_encodeSegmentsAdvanced(NULL, 0, ecl, minVersion, maxVersion, mask, boostEcl,
tempBuffer, qrcode);
+ size_t bufLen = qrcodegen_BUFFER_LEN_FOR_VERSION(maxVersion);
+
+ struct qrcodegen_Segment seg;
+ if (qrcodegen_isNumeric(text)) {
+ if (qrcodegen_calcSegmentBufferSize(qrcodegen_Mode_NUMERIC, textLen) > bufLen)
+ goto fail;
+ seg = qrcodegen_makeNumeric(text, tempBuffer);
+ } else if (qrcodegen_isAlphanumeric(text)) {
+ if (qrcodegen_calcSegmentBufferSize(qrcodegen_Mode_ALPHANUMERIC, textLen) > bufLen)
+ goto fail;
+ seg = qrcodegen_makeAlphanumeric(text, tempBuffer);
+ } else {
+ if (textLen > bufLen)
+ goto fail;
+ for (size_t i = 0; i < textLen; i++)
+ tempBuffer[i] = (uint8_t)text[i];
+ seg.mode = qrcodegen_Mode_BYTE;
+ seg.bitLength = calcSegmentBitLength(seg.mode, textLen);
+ if (seg.bitLength == -1)
+ goto fail;
+ seg.numChars = (int)textLen;
+ seg.data = tempBuffer;
+ }
+ return qrcodegen_encodeSegmentsAdvanced(&seg, 1, ecl, minVersion, maxVersion, mask, boostEcl,
tempBuffer, qrcode);
+
+fail:
+ qrcode[0] = 0; // Set size to invalid value for safety
+ return false;
+}
+
+
+// Public function - see documentation comment in header file.
+bool qrcodegen_encodeBinary(uint8_t dataAndTemp[], size_t dataLen, uint8_t qrcode[],
+ enum qrcodegen_Ecc ecl, int minVersion, int maxVersion, enum qrcodegen_Mask mask, bool
boostEcl) {
+
+ struct qrcodegen_Segment seg;
+ seg.mode = qrcodegen_Mode_BYTE;
+ seg.bitLength = calcSegmentBitLength(seg.mode, dataLen);
+ if (seg.bitLength == -1) {
+ qrcode[0] = 0; // Set size to invalid value for safety
+ return false;
+ }
+ seg.numChars = (int)dataLen;
+ seg.data = dataAndTemp;
+ return qrcodegen_encodeSegmentsAdvanced(&seg, 1, ecl, minVersion, maxVersion, mask, boostEcl,
dataAndTemp, qrcode);
+}
+
+
+// Appends the given number of low-order bits of the given value to the given byte-based
+// bit buffer, increasing the bit length. Requires 0 <= numBits <= 16 and val < 2^numBits.
+testable void appendBitsToBuffer(unsigned int val, int numBits, uint8_t buffer[], int *bitLen) {
+ assert(0 <= numBits && numBits <= 16 && (unsigned long)val >> numBits == 0);
+ for (int i = numBits - 1; i >= 0; i--, (*bitLen)++)
+ buffer[*bitLen >> 3] |= ((val >> i) & 1) << (7 - (*bitLen & 7));
+}
+
+
+
+/*---- Low-level QR Code encoding functions ----*/
+
+// Public function - see documentation comment in header file.
+bool qrcodegen_encodeSegments(const struct qrcodegen_Segment segs[], size_t len,
+ enum qrcodegen_Ecc ecl, uint8_t tempBuffer[], uint8_t qrcode[]) {
+ return qrcodegen_encodeSegmentsAdvanced(segs, len, ecl,
+ qrcodegen_VERSION_MIN, qrcodegen_VERSION_MAX, -1, true, tempBuffer, qrcode);
+}
+
+
+// Public function - see documentation comment in header file.
+bool qrcodegen_encodeSegmentsAdvanced(const struct qrcodegen_Segment segs[], size_t len, enum qrcodegen_Ecc
ecl,
+ int minVersion, int maxVersion, int mask, bool boostEcl, uint8_t tempBuffer[], uint8_t
qrcode[]) {
+ assert(segs != NULL || len == 0);
+ assert(qrcodegen_VERSION_MIN <= minVersion && minVersion <= maxVersion && maxVersion <=
qrcodegen_VERSION_MAX);
+ assert(0 <= (int)ecl && (int)ecl <= 3 && -1 <= (int)mask && (int)mask <= 7);
+
+ // Find the minimal version number to use
+ int version, dataUsedBits;
+ for (version = minVersion; ; version++) {
+ int dataCapacityBits = getNumDataCodewords(version, ecl) * 8; // Number of data bits
available
+ dataUsedBits = getTotalBits(segs, len, version);
+ if (dataUsedBits != -1 && dataUsedBits <= dataCapacityBits)
+ break; // This version number is found to be suitable
+ if (version >= maxVersion) { // All versions in the range could not fit the given data
+ qrcode[0] = 0; // Set size to invalid value for safety
+ return false;
+ }
+ }
+ assert(dataUsedBits != -1);
+
+ // Increase the error correction level while the data still fits in the current version number
+ for (int i = (int)qrcodegen_Ecc_MEDIUM; i <= (int)qrcodegen_Ecc_HIGH; i++) { // From low to high
+ if (boostEcl && dataUsedBits <= getNumDataCodewords(version, (enum qrcodegen_Ecc)i) * 8)
+ ecl = (enum qrcodegen_Ecc)i;
+ }
+
+ // Concatenate all segments to create the data bit string
+ memset(qrcode, 0, qrcodegen_BUFFER_LEN_FOR_VERSION(version) * sizeof(qrcode[0]));
+ int bitLen = 0;
+ for (size_t i = 0; i < len; i++) {
+ const struct qrcodegen_Segment *seg = &segs[i];
+ appendBitsToBuffer((int)seg->mode, 4, qrcode, &bitLen);
+ appendBitsToBuffer(seg->numChars, numCharCountBits(seg->mode, version), qrcode, &bitLen);
+ for (int j = 0; j < seg->bitLength; j++)
+ appendBitsToBuffer((seg->data[j >> 3] >> (7 - (j & 7))) & 1, 1, qrcode, &bitLen);
+ }
+ assert(bitLen == dataUsedBits);
+
+ // Add terminator and pad up to a byte if applicable
+ int dataCapacityBits = getNumDataCodewords(version, ecl) * 8;
+ assert(bitLen <= dataCapacityBits);
+ int terminatorBits = dataCapacityBits - bitLen;
+ if (terminatorBits > 4)
+ terminatorBits = 4;
+ appendBitsToBuffer(0, terminatorBits, qrcode, &bitLen);
+ appendBitsToBuffer(0, (8 - bitLen % 8) % 8, qrcode, &bitLen);
+ assert(bitLen % 8 == 0);
+
+ // Pad with alternating bytes until data capacity is reached
+ for (uint8_t padByte = 0xEC; bitLen < dataCapacityBits; padByte ^= 0xEC ^ 0x11)
+ appendBitsToBuffer(padByte, 8, qrcode, &bitLen);
+
+ // Draw function and data codeword modules
+ addEccAndInterleave(qrcode, version, ecl, tempBuffer);
+ initializeFunctionModules(version, qrcode);
+ drawCodewords(tempBuffer, getNumRawDataModules(version) / 8, qrcode);
+ drawWhiteFunctionModules(qrcode, version);
+ initializeFunctionModules(version, tempBuffer);
+
+ // Handle masking
+ if (mask == qrcodegen_Mask_AUTO) { // Automatically choose best mask
+ long minPenalty = LONG_MAX;
+ for (int i = 0; i < 8; i++) {
+ enum qrcodegen_Mask msk = (enum qrcodegen_Mask)i;
+ drawFormatBits(ecl, msk, qrcode);
+ applyMask(tempBuffer, qrcode, msk);
+ long penalty = getPenaltyScore(qrcode);
+ if (penalty < minPenalty) {
+ mask = msk;
+ minPenalty = penalty;
+ }
+ applyMask(tempBuffer, qrcode, msk); // Undoes the mask due to XOR
+ }
+ }
+ assert(0 <= (int)mask && (int)mask <= 7);
+ drawFormatBits(ecl, mask, qrcode);
+ applyMask(tempBuffer, qrcode, mask);
+ return true;
+}
+
+
+
+/*---- Error correction code generation functions ----*/
+
+// Appends error correction bytes to each block of the given data array, then interleaves
+// bytes from the blocks and stores them in the result array. data[0 : dataLen] contains
+// the input data. data[dataLen : rawCodewords] is used as a temporary work area and will
+// be clobbered by this function. The final answer is stored in result[0 : rawCodewords].
+testable void addEccAndInterleave(uint8_t data[], int version, enum qrcodegen_Ecc ecl, uint8_t result[]) {
+ // Calculate parameter numbers
+ assert(0 <= (int)ecl && (int)ecl < 4 && qrcodegen_VERSION_MIN <= version && version <=
qrcodegen_VERSION_MAX);
+ int numBlocks = NUM_ERROR_CORRECTION_BLOCKS[(int)ecl][version];
+ int blockEccLen = ECC_CODEWORDS_PER_BLOCK [(int)ecl][version];
+ int rawCodewords = getNumRawDataModules(version) / 8;
+ int dataLen = getNumDataCodewords(version, ecl);
+ int numShortBlocks = numBlocks - rawCodewords % numBlocks;
+ int shortBlockDataLen = rawCodewords / numBlocks - blockEccLen;
+
+ // Split data into blocks, calculate ECC, and interleave
+ // (not concatenate) the bytes into a single sequence
+ uint8_t generator[qrcodegen_REED_SOLOMON_DEGREE_MAX];
+ calcReedSolomonGenerator(blockEccLen, generator);
+ const uint8_t *dat = data;
+ for (int i = 0; i < numBlocks; i++) {
+ int datLen = shortBlockDataLen + (i < numShortBlocks ? 0 : 1);
+ uint8_t *ecc = &data[dataLen]; // Temporary storage
+ calcReedSolomonRemainder(dat, datLen, generator, blockEccLen, ecc);
+ for (int j = 0, k = i; j < datLen; j++, k += numBlocks) { // Copy data
+ if (j == shortBlockDataLen)
+ k -= numShortBlocks;
+ result[k] = dat[j];
+ }
+ for (int j = 0, k = dataLen + i; j < blockEccLen; j++, k += numBlocks) // Copy ECC
+ result[k] = ecc[j];
+ dat += datLen;
+ }
+}
+
+
+// Returns the number of 8-bit codewords that can be used for storing data (not ECC),
+// for the given version number and error correction level. The result is in the range [9, 2956].
+testable int getNumDataCodewords(int version, enum qrcodegen_Ecc ecl) {
+ int v = version, e = (int)ecl;
+ assert(0 <= e && e < 4);
+ return getNumRawDataModules(v) / 8
+ - ECC_CODEWORDS_PER_BLOCK [e][v]
+ * NUM_ERROR_CORRECTION_BLOCKS[e][v];
+}
+
+
+// Returns the number of data bits that can be stored in a QR Code of the given version number, after
+// all function modules are excluded. This includes remainder bits, so it might not be a multiple of 8.
+// The result is in the range [208, 29648]. This could be implemented as a 40-entry lookup table.
+testable int getNumRawDataModules(int ver) {
+ assert(qrcodegen_VERSION_MIN <= ver && ver <= qrcodegen_VERSION_MAX);
+ int result = (16 * ver + 128) * ver + 64;
+ if (ver >= 2) {
+ int numAlign = ver / 7 + 2;
+ result -= (25 * numAlign - 10) * numAlign - 55;
+ if (ver >= 7)
+ result -= 36;
+ }
+ return result;
+}
+
+
+
+/*---- Reed-Solomon ECC generator functions ----*/
+
+// Calculates the Reed-Solomon generator polynomial of the given degree, storing in result[0 : degree].
+testable void calcReedSolomonGenerator(int degree, uint8_t result[]) {
+ // Start with the monomial x^0
+ assert(1 <= degree && degree <= qrcodegen_REED_SOLOMON_DEGREE_MAX);
+ memset(result, 0, degree * sizeof(result[0]));
+ result[degree - 1] = 1;
+
+ // Compute the product polynomial (x - r^0) * (x - r^1) * (x - r^2) * ... * (x - r^{degree-1}),
+ // drop the highest term, and store the rest of the coefficients in order of descending powers.
+ // Note that r = 0x02, which is a generator element of this field GF(2^8/0x11D).
+ uint8_t root = 1;
+ for (int i = 0; i < degree; i++) {
+ // Multiply the current product by (x - r^i)
+ for (int j = 0; j < degree; j++) {
+ result[j] = finiteFieldMultiply(result[j], root);
+ if (j + 1 < degree)
+ result[j] ^= result[j + 1];
+ }
+ root = finiteFieldMultiply(root, 0x02);
+ }
+}
+
+
+// Calculates the remainder of the polynomial data[0 : dataLen] when divided by the generator[0 : degree],
where all
+// polynomials are in big endian and the generator has an implicit leading 1 term, storing the result in
result[0 : degree].
+testable void calcReedSolomonRemainder(const uint8_t data[], int dataLen,
+ const uint8_t generator[], int degree, uint8_t result[]) {
+
+ // Perform polynomial division
+ assert(1 <= degree && degree <= qrcodegen_REED_SOLOMON_DEGREE_MAX);
+ memset(result, 0, degree * sizeof(result[0]));
+ for (int i = 0; i < dataLen; i++) {
+ uint8_t factor = data[i] ^ result[0];
+ memmove(&result[0], &result[1], (degree - 1) * sizeof(result[0]));
+ result[degree - 1] = 0;
+ for (int j = 0; j < degree; j++)
+ result[j] ^= finiteFieldMultiply(generator[j], factor);
+ }
+}
+
+#undef qrcodegen_REED_SOLOMON_DEGREE_MAX
+
+
+// Returns the product of the two given field elements modulo GF(2^8/0x11D).
+// All inputs are valid. This could be implemented as a 256*256 lookup table.
+testable uint8_t finiteFieldMultiply(uint8_t x, uint8_t y) {
+ // Russian peasant multiplication
+ uint8_t z = 0;
+ for (int i = 7; i >= 0; i--) {
+ z = (z << 1) ^ ((z >> 7) * 0x11D);
+ z ^= ((y >> i) & 1) * x;
+ }
+ return z;
+}
+
+
+
+/*---- Drawing function modules ----*/
+
+// Clears the given QR Code grid with white modules for the given
+// version's size, then marks every function module as black.
+testable void initializeFunctionModules(int version, uint8_t qrcode[]) {
+ // Initialize QR Code
+ int qrsize = version * 4 + 17;
+ memset(qrcode, 0, ((qrsize * qrsize + 7) / 8 + 1) * sizeof(qrcode[0]));
+ qrcode[0] = (uint8_t)qrsize;
+
+ // Fill horizontal and vertical timing patterns
+ fillRectangle(6, 0, 1, qrsize, qrcode);
+ fillRectangle(0, 6, qrsize, 1, qrcode);
+
+ // Fill 3 finder patterns (all corners except bottom right) and format bits
+ fillRectangle(0, 0, 9, 9, qrcode);
+ fillRectangle(qrsize - 8, 0, 8, 9, qrcode);
+ fillRectangle(0, qrsize - 8, 9, 8, qrcode);
+
+ // Fill numerous alignment patterns
+ uint8_t alignPatPos[7];
+ int numAlign = getAlignmentPatternPositions(version, alignPatPos);
+ for (int i = 0; i < numAlign; i++) {
+ for (int j = 0; j < numAlign; j++) {
+ // Don't draw on the three finder corners
+ if (!((i == 0 && j == 0) || (i == 0 && j == numAlign - 1) || (i == numAlign - 1 && j
== 0)))
+ fillRectangle(alignPatPos[i] - 2, alignPatPos[j] - 2, 5, 5, qrcode);
+ }
+ }
+
+ // Fill version blocks
+ if (version >= 7) {
+ fillRectangle(qrsize - 11, 0, 3, 6, qrcode);
+ fillRectangle(0, qrsize - 11, 6, 3, qrcode);
+ }
+}
+
+
+// Draws white function modules and possibly some black modules onto the given QR Code, without changing
+// non-function modules. This does not draw the format bits. This requires all function modules to be
previously
+// marked black (namely by initializeFunctionModules()), because this may skip redrawing black function
modules.
+static void drawWhiteFunctionModules(uint8_t qrcode[], int version) {
+ // Draw horizontal and vertical timing patterns
+ int qrsize = qrcodegen_getSize(qrcode);
+ for (int i = 7; i < qrsize - 7; i += 2) {
+ setModule(qrcode, 6, i, false);
+ setModule(qrcode, i, 6, false);
+ }
+
+ // Draw 3 finder patterns (all corners except bottom right; overwrites some timing modules)
+ for (int dy = -4; dy <= 4; dy++) {
+ for (int dx = -4; dx <= 4; dx++) {
+ int dist = abs(dx);
+ if (abs(dy) > dist)
+ dist = abs(dy);
+ if (dist == 2 || dist == 4) {
+ setModuleBounded(qrcode, 3 + dx, 3 + dy, false);
+ setModuleBounded(qrcode, qrsize - 4 + dx, 3 + dy, false);
+ setModuleBounded(qrcode, 3 + dx, qrsize - 4 + dy, false);
+ }
+ }
+ }
+
+ // Draw numerous alignment patterns
+ uint8_t alignPatPos[7];
+ int numAlign = getAlignmentPatternPositions(version, alignPatPos);
+ for (int i = 0; i < numAlign; i++) {
+ for (int j = 0; j < numAlign; j++) {
+ if ((i == 0 && j == 0) || (i == 0 && j == numAlign - 1) || (i == numAlign - 1 && j ==
0))
+ continue; // Don't draw on the three finder corners
+ for (int dy = -1; dy <= 1; dy++) {
+ for (int dx = -1; dx <= 1; dx++)
+ setModule(qrcode, alignPatPos[i] + dx, alignPatPos[j] + dy, dx == 0
&& dy == 0);
+ }
+ }
+ }
+
+ // Draw version blocks
+ if (version >= 7) {
+ // Calculate error correction code and pack bits
+ int rem = version; // version is uint6, in the range [7, 40]
+ for (int i = 0; i < 12; i++)
+ rem = (rem << 1) ^ ((rem >> 11) * 0x1F25);
+ long bits = (long)version << 12 | rem; // uint18
+ assert(bits >> 18 == 0);
+
+ // Draw two copies
+ for (int i = 0; i < 6; i++) {
+ for (int j = 0; j < 3; j++) {
+ int k = qrsize - 11 + j;
+ setModule(qrcode, k, i, (bits & 1) != 0);
+ setModule(qrcode, i, k, (bits & 1) != 0);
+ bits >>= 1;
+ }
+ }
+ }
+}
+
+
+// Draws two copies of the format bits (with its own error correction code) based
+// on the given mask and error correction level. This always draws all modules of
+// the format bits, unlike drawWhiteFunctionModules() which might skip black modules.
+static void drawFormatBits(enum qrcodegen_Ecc ecl, enum qrcodegen_Mask mask, uint8_t qrcode[]) {
+ // Calculate error correction code and pack bits
+ assert(0 <= (int)mask && (int)mask <= 7);
+ static const int table[] = {1, 0, 3, 2};
+ int data = table[(int)ecl] << 3 | (int)mask; // errCorrLvl is uint2, mask is uint3
+ int rem = data;
+ for (int i = 0; i < 10; i++)
+ rem = (rem << 1) ^ ((rem >> 9) * 0x537);
+ int bits = (data << 10 | rem) ^ 0x5412; // uint15
+ assert(bits >> 15 == 0);
+
+ // Draw first copy
+ for (int i = 0; i <= 5; i++)
+ setModule(qrcode, 8, i, getBit(bits, i));
+ setModule(qrcode, 8, 7, getBit(bits, 6));
+ setModule(qrcode, 8, 8, getBit(bits, 7));
+ setModule(qrcode, 7, 8, getBit(bits, 8));
+ for (int i = 9; i < 15; i++)
+ setModule(qrcode, 14 - i, 8, getBit(bits, i));
+
+ // Draw second copy
+ int qrsize = qrcodegen_getSize(qrcode);
+ for (int i = 0; i < 8; i++)
+ setModule(qrcode, qrsize - 1 - i, 8, getBit(bits, i));
+ for (int i = 8; i < 15; i++)
+ setModule(qrcode, 8, qrsize - 15 + i, getBit(bits, i));
+ setModule(qrcode, 8, qrsize - 8, true); // Always black
+}
+
+
+// Calculates and stores an ascending list of positions of alignment patterns
+// for this version number, returning the length of the list (in the range [0,7]).
+// Each position is in the range [0,177), and are used on both the x and y axes.
+// This could be implemented as lookup table of 40 variable-length lists of unsigned bytes.
+testable int getAlignmentPatternPositions(int version, uint8_t result[7]) {
+ if (version == 1)
+ return 0;
+ int numAlign = version / 7 + 2;
+ int step = (version == 32) ? 26 :
+ (version*4 + numAlign*2 + 1) / (numAlign*2 - 2) * 2;
+ for (int i = numAlign - 1, pos = version * 4 + 10; i >= 1; i--, pos -= step)
+ result[i] = pos;
+ result[0] = 6;
+ return numAlign;
+}
+
+
+// Sets every pixel in the range [left : left + width] * [top : top + height] to black.
+static void fillRectangle(int left, int top, int width, int height, uint8_t qrcode[]) {
+ for (int dy = 0; dy < height; dy++) {
+ for (int dx = 0; dx < width; dx++)
+ setModule(qrcode, left + dx, top + dy, true);
+ }
+}
+
+
+
+/*---- Drawing data modules and masking ----*/
+
+// Draws the raw codewords (including data and ECC) onto the given QR Code. This requires the initial state
of
+// the QR Code to be black at function modules and white at codeword modules (including unused remainder
bits).
+static void drawCodewords(const uint8_t data[], int dataLen, uint8_t qrcode[]) {
+ int qrsize = qrcodegen_getSize(qrcode);
+ int i = 0; // Bit index into the data
+ // Do the funny zigzag scan
+ for (int right = qrsize - 1; right >= 1; right -= 2) { // Index of right column in each column pair
+ if (right == 6)
+ right = 5;
+ for (int vert = 0; vert < qrsize; vert++) { // Vertical counter
+ for (int j = 0; j < 2; j++) {
+ int x = right - j; // Actual x coordinate
+ bool upward = ((right + 1) & 2) == 0;
+ int y = upward ? qrsize - 1 - vert : vert; // Actual y coordinate
+ if (!getModule(qrcode, x, y) && i < dataLen * 8) {
+ bool black = getBit(data[i >> 3], 7 - (i & 7));
+ setModule(qrcode, x, y, black);
+ i++;
+ }
+ // If this QR Code has any remainder bits (0 to 7), they were assigned as
+ // 0/false/white by the constructor and are left unchanged by this method
+ }
+ }
+ }
+ assert(i == dataLen * 8);
+}
+
+
+// XORs the codeword modules in this QR Code with the given mask pattern.
+// The function modules must be marked and the codeword bits must be drawn
+// before masking. Due to the arithmetic of XOR, calling applyMask() with
+// the same mask value a second time will undo the mask. A final well-formed
+// QR Code needs exactly one (not zero, two, etc.) mask applied.
+static void applyMask(const uint8_t functionModules[], uint8_t qrcode[], enum qrcodegen_Mask mask) {
+ assert(0 <= (int)mask && (int)mask <= 7); // Disallows qrcodegen_Mask_AUTO
+ int qrsize = qrcodegen_getSize(qrcode);
+ for (int y = 0; y < qrsize; y++) {
+ for (int x = 0; x < qrsize; x++) {
+ if (getModule(functionModules, x, y))
+ continue;
+ bool invert;
+ switch ((int)mask) {
+ case 0: invert = (x + y) % 2 == 0; break;
+ case 1: invert = y % 2 == 0; break;
+ case 2: invert = x % 3 == 0; break;
+ case 3: invert = (x + y) % 3 == 0; break;
+ case 4: invert = (x / 3 + y / 2) % 2 == 0; break;
+ case 5: invert = x * y % 2 + x * y % 3 == 0; break;
+ case 6: invert = (x * y % 2 + x * y % 3) % 2 == 0; break;
+ case 7: invert = ((x + y) % 2 + x * y % 3) % 2 == 0; break;
+ default: assert(false); return;
+ }
+ bool val = getModule(qrcode, x, y);
+ setModule(qrcode, x, y, val ^ invert);
+ }
+ }
+}
+
+
+// Calculates and returns the penalty score based on state of the given QR Code's current modules.
+// This is used by the automatic mask choice algorithm to find the mask pattern that yields the lowest score.
+static long getPenaltyScore(const uint8_t qrcode[]) {
+ int qrsize = qrcodegen_getSize(qrcode);
+ long result = 0;
+
+ // Adjacent modules in row having same color, and finder-like patterns
+ for (int y = 0; y < qrsize; y++) {
+ unsigned char runHistory[7] = {0};
+ bool color = false;
+ unsigned char runX = 0;
+ for (int x = 0; x < qrsize; x++) {
+ if (getModule(qrcode, x, y) == color) {
+ runX++;
+ if (runX == 5)
+ result += PENALTY_N1;
+ else if (runX > 5)
+ result++;
+ } else {
+ addRunToHistory(runX, runHistory);
+ if (!color && hasFinderLikePattern(runHistory))
+ result += PENALTY_N3;
+ color = getModule(qrcode, x, y);
+ runX = 1;
+ }
+ }
+ addRunToHistory(runX, runHistory);
+ if (color)
+ addRunToHistory(0, runHistory); // Dummy run of white
+ if (hasFinderLikePattern(runHistory))
+ result += PENALTY_N3;
+ }
+ // Adjacent modules in column having same color, and finder-like patterns
+ for (int x = 0; x < qrsize; x++) {
+ unsigned char runHistory[7] = {0};
+ bool color = false;
+ unsigned char runY = 0;
+ for (int y = 0; y < qrsize; y++) {
+ if (getModule(qrcode, x, y) == color) {
+ runY++;
+ if (runY == 5)
+ result += PENALTY_N1;
+ else if (runY > 5)
+ result++;
+ } else {
+ addRunToHistory(runY, runHistory);
+ if (!color && hasFinderLikePattern(runHistory))
+ result += PENALTY_N3;
+ color = getModule(qrcode, x, y);
+ runY = 1;
+ }
+ }
+ addRunToHistory(runY, runHistory);
+ if (color)
+ addRunToHistory(0, runHistory); // Dummy run of white
+ if (hasFinderLikePattern(runHistory))
+ result += PENALTY_N3;
+ }
+
+ // 2*2 blocks of modules having same color
+ for (int y = 0; y < qrsize - 1; y++) {
+ for (int x = 0; x < qrsize - 1; x++) {
+ bool color = getModule(qrcode, x, y);
+ if ( color == getModule(qrcode, x + 1, y) &&
+ color == getModule(qrcode, x, y + 1) &&
+ color == getModule(qrcode, x + 1, y + 1))
+ result += PENALTY_N2;
+ }
+ }
+
+ // Balance of black and white modules
+ int black = 0;
+ for (int y = 0; y < qrsize; y++) {
+ for (int x = 0; x < qrsize; x++) {
+ if (getModule(qrcode, x, y))
+ black++;
+ }
+ }
+ int total = qrsize * qrsize; // Note that size is odd, so black/total != 1/2
+ // Compute the smallest integer k >= 0 such that (45-5k)% <= black/total <= (55+5k)%
+ int k = (int)((labs(black * 20L - total * 10L) + total - 1) / total) - 1;
+ result += k * PENALTY_N4;
+ return result;
+}
+
+
+// Inserts the given value to the front of the given array, which shifts over the
+// existing values and deletes the last value. A helper function for getPenaltyScore().
+static void addRunToHistory(unsigned char run, unsigned char history[7]) {
+ memmove(&history[1], &history[0], 6 * sizeof(history[0]));
+ history[0] = run;
+}
+
+
+// Tests whether the given run history has the pattern of ratio 1:1:3:1:1 in the middle, and
+// surrounded by at least 4 on either or both ends. A helper function for getPenaltyScore().
+// Must only be called immediately after a run of white modules has ended.
+static bool hasFinderLikePattern(unsigned char runHistory[7]) {
+ unsigned char n = runHistory[1];
+ // The maximum QR Code size is 177, hence the run length n <= 177.
+ // Arithmetic is promoted to int, so n*4 will not overflow.
+ return n > 0 && runHistory[2] == n && runHistory[4] == n && runHistory[5] == n
+ && runHistory[3] == n * 3 && (runHistory[0] >= n * 4 || runHistory[6] >= n * 4);
+}
+
+
+
+/*---- Basic QR Code information ----*/
+
+// Public function - see documentation comment in header file.
+int qrcodegen_getSize(const uint8_t qrcode[]) {
+ assert(qrcode != NULL);
+ int result = qrcode[0];
+ assert((qrcodegen_VERSION_MIN * 4 + 17) <= result
+ && result <= (qrcodegen_VERSION_MAX * 4 + 17));
+ return result;
+}
+
+
+// Public function - see documentation comment in header file.
+bool qrcodegen_getModule(const uint8_t qrcode[], int x, int y) {
+ assert(qrcode != NULL);
+ int qrsize = qrcode[0];
+ return (0 <= x && x < qrsize && 0 <= y && y < qrsize) && getModule(qrcode, x, y);
+}
+
+
+// Gets the module at the given coordinates, which must be in bounds.
+testable bool getModule(const uint8_t qrcode[], int x, int y) {
+ int qrsize = qrcode[0];
+ assert(21 <= qrsize && qrsize <= 177 && 0 <= x && x < qrsize && 0 <= y && y < qrsize);
+ int index = y * qrsize + x;
+ return getBit(qrcode[(index >> 3) + 1], index & 7);
+}
+
+
+// Sets the module at the given coordinates, which must be in bounds.
+testable void setModule(uint8_t qrcode[], int x, int y, bool isBlack) {
+ int qrsize = qrcode[0];
+ assert(21 <= qrsize && qrsize <= 177 && 0 <= x && x < qrsize && 0 <= y && y < qrsize);
+ int index = y * qrsize + x;
+ int bitIndex = index & 7;
+ int byteIndex = (index >> 3) + 1;
+ if (isBlack)
+ qrcode[byteIndex] |= 1 << bitIndex;
+ else
+ qrcode[byteIndex] &= (1 << bitIndex) ^ 0xFF;
+}
+
+
+// Sets the module at the given coordinates, doing nothing if out of bounds.
+testable void setModuleBounded(uint8_t qrcode[], int x, int y, bool isBlack) {
+ int qrsize = qrcode[0];
+ if (0 <= x && x < qrsize && 0 <= y && y < qrsize)
+ setModule(qrcode, x, y, isBlack);
+}
+
+
+// Returns true iff the i'th bit of x is set to 1. Requires x >= 0 and 0 <= i <= 14.
+static bool getBit(int x, int i) {
+ return ((x >> i) & 1) != 0;
+}
+
+
+
+/*---- Segment handling ----*/
+
+// Public function - see documentation comment in header file.
+bool qrcodegen_isAlphanumeric(const char *text) {
+ assert(text != NULL);
+ for (; *text != '\0'; text++) {
+ if (strchr(ALPHANUMERIC_CHARSET, *text) == NULL)
+ return false;
+ }
+ return true;
+}
+
+
+// Public function - see documentation comment in header file.
+bool qrcodegen_isNumeric(const char *text) {
+ assert(text != NULL);
+ for (; *text != '\0'; text++) {
+ if (*text < '0' || *text > '9')
+ return false;
+ }
+ return true;
+}
+
+
+// Public function - see documentation comment in header file.
+size_t qrcodegen_calcSegmentBufferSize(enum qrcodegen_Mode mode, size_t numChars) {
+ int temp = calcSegmentBitLength(mode, numChars);
+ if (temp == -1)
+ return SIZE_MAX;
+ assert(0 <= temp && temp <= INT16_MAX);
+ return ((size_t)temp + 7) / 8;
+}
+
+
+// Returns the number of data bits needed to represent a segment
+// containing the given number of characters using the given mode. Notes:
+// - Returns -1 on failure, i.e. numChars > INT16_MAX or
+// the number of needed bits exceeds INT16_MAX (i.e. 32767).
+// - Otherwise, all valid results are in the range [0, INT16_MAX].
+// - For byte mode, numChars measures the number of bytes, not Unicode code points.
+// - For ECI mode, numChars must be 0, and the worst-case number of bits is returned.
+// An actual ECI segment can have shorter data. For non-ECI modes, the result is exact.
+testable int calcSegmentBitLength(enum qrcodegen_Mode mode, size_t numChars) {
+ // All calculations are designed to avoid overflow on all platforms
+ if (numChars > (unsigned int)INT16_MAX)
+ return -1;
+ long result = (long)numChars;
+ if (mode == qrcodegen_Mode_NUMERIC)
+ result = (result * 10 + 2) / 3; // ceil(10/3 * n)
+ else if (mode == qrcodegen_Mode_ALPHANUMERIC)
+ result = (result * 11 + 1) / 2; // ceil(11/2 * n)
+ else if (mode == qrcodegen_Mode_BYTE)
+ result *= 8;
+ else if (mode == qrcodegen_Mode_KANJI)
+ result *= 13;
+ else if (mode == qrcodegen_Mode_ECI && numChars == 0)
+ result = 3 * 8;
+ else { // Invalid argument
+ assert(false);
+ return -1;
+ }
+ assert(result >= 0);
+ if (result > (unsigned int)INT16_MAX)
+ return -1;
+ return (int)result;
+}
+
+
+// Public function - see documentation comment in header file.
+struct qrcodegen_Segment qrcodegen_makeBytes(const uint8_t data[], size_t len, uint8_t buf[]) {
+ assert(data != NULL || len == 0);
+ struct qrcodegen_Segment result;
+ result.mode = qrcodegen_Mode_BYTE;
+ result.bitLength = calcSegmentBitLength(result.mode, len);
+ assert(result.bitLength != -1);
+ result.numChars = (int)len;
+ if (len > 0)
+ memcpy(buf, data, len * sizeof(buf[0]));
+ result.data = buf;
+ return result;
+}
+
+
+// Public function - see documentation comment in header file.
+struct qrcodegen_Segment qrcodegen_makeNumeric(const char *digits, uint8_t buf[]) {
+ assert(digits != NULL);
+ struct qrcodegen_Segment result;
+ size_t len = strlen(digits);
+ result.mode = qrcodegen_Mode_NUMERIC;
+ int bitLen = calcSegmentBitLength(result.mode, len);
+ assert(bitLen != -1);
+ result.numChars = (int)len;
+ if (bitLen > 0)
+ memset(buf, 0, ((size_t)bitLen + 7) / 8 * sizeof(buf[0]));
+ result.bitLength = 0;
+
+ unsigned int accumData = 0;
+ int accumCount = 0;
+ for (; *digits != '\0'; digits++) {
+ char c = *digits;
+ assert('0' <= c && c <= '9');
+ accumData = accumData * 10 + (unsigned int)(c - '0');
+ accumCount++;
+ if (accumCount == 3) {
+ appendBitsToBuffer(accumData, 10, buf, &result.bitLength);
+ accumData = 0;
+ accumCount = 0;
+ }
+ }
+ if (accumCount > 0) // 1 or 2 digits remaining
+ appendBitsToBuffer(accumData, accumCount * 3 + 1, buf, &result.bitLength);
+ assert(result.bitLength == bitLen);
+ result.data = buf;
+ return result;
+}
+
+
+// Public function - see documentation comment in header file.
+struct qrcodegen_Segment qrcodegen_makeAlphanumeric(const char *text, uint8_t buf[]) {
+ assert(text != NULL);
+ struct qrcodegen_Segment result;
+ size_t len = strlen(text);
+ result.mode = qrcodegen_Mode_ALPHANUMERIC;
+ int bitLen = calcSegmentBitLength(result.mode, len);
+ assert(bitLen != -1);
+ result.numChars = (int)len;
+ if (bitLen > 0)
+ memset(buf, 0, ((size_t)bitLen + 7) / 8 * sizeof(buf[0]));
+ result.bitLength = 0;
+
+ unsigned int accumData = 0;
+ int accumCount = 0;
+ for (; *text != '\0'; text++) {
+ const char *temp = strchr(ALPHANUMERIC_CHARSET, *text);
+ assert(temp != NULL);
+ accumData = accumData * 45 + (unsigned int)(temp - ALPHANUMERIC_CHARSET);
+ accumCount++;
+ if (accumCount == 2) {
+ appendBitsToBuffer(accumData, 11, buf, &result.bitLength);
+ accumData = 0;
+ accumCount = 0;
+ }
+ }
+ if (accumCount > 0) // 1 character remaining
+ appendBitsToBuffer(accumData, 6, buf, &result.bitLength);
+ assert(result.bitLength == bitLen);
+ result.data = buf;
+ return result;
+}
+
+
+// Public function - see documentation comment in header file.
+struct qrcodegen_Segment qrcodegen_makeEci(long assignVal, uint8_t buf[]) {
+ struct qrcodegen_Segment result;
+ result.mode = qrcodegen_Mode_ECI;
+ result.numChars = 0;
+ result.bitLength = 0;
+ if (assignVal < 0)
+ assert(false);
+ else if (assignVal < (1 << 7)) {
+ memset(buf, 0, 1 * sizeof(buf[0]));
+ appendBitsToBuffer(assignVal, 8, buf, &result.bitLength);
+ } else if (assignVal < (1 << 14)) {
+ memset(buf, 0, 2 * sizeof(buf[0]));
+ appendBitsToBuffer(2, 2, buf, &result.bitLength);
+ appendBitsToBuffer(assignVal, 14, buf, &result.bitLength);
+ } else if (assignVal < 1000000L) {
+ memset(buf, 0, 3 * sizeof(buf[0]));
+ appendBitsToBuffer(6, 3, buf, &result.bitLength);
+ appendBitsToBuffer(assignVal >> 10, 11, buf, &result.bitLength);
+ appendBitsToBuffer(assignVal & 0x3FF, 10, buf, &result.bitLength);
+ } else
+ assert(false);
+ result.data = buf;
+ return result;
+}
+
+
+// Calculates the number of bits needed to encode the given segments at the given version.
+// Returns a non-negative number if successful. Otherwise returns -1 if a segment has too
+// many characters to fit its length field, or the total bits exceeds INT16_MAX.
+testable int getTotalBits(const struct qrcodegen_Segment segs[], size_t len, int version) {
+ assert(segs != NULL || len == 0);
+ long result = 0;
+ for (size_t i = 0; i < len; i++) {
+ int numChars = segs[i].numChars;
+ int bitLength = segs[i].bitLength;
+ assert(0 <= numChars && numChars <= INT16_MAX);
+ assert(0 <= bitLength && bitLength <= INT16_MAX);
+ int ccbits = numCharCountBits(segs[i].mode, version);
+ assert(0 <= ccbits && ccbits <= 16);
+ if (numChars >= (1L << ccbits))
+ return -1; // The segment's length doesn't fit the field's bit width
+ result += 4L + ccbits + bitLength;
+ if (result > INT16_MAX)
+ return -1; // The sum might overflow an int type
+ }
+ assert(0 <= result && result <= INT16_MAX);
+ return (int)result;
+}
+
+
+// Returns the bit width of the character count field for a segment in the given mode
+// in a QR Code at the given version number. The result is in the range [0, 16].
+static int numCharCountBits(enum qrcodegen_Mode mode, int version) {
+ assert(qrcodegen_VERSION_MIN <= version && version <= qrcodegen_VERSION_MAX);
+ int i = (version + 7) / 17;
+ switch (mode) {
+ case qrcodegen_Mode_NUMERIC : { static const int temp[] = {10, 12, 14}; return temp[i]; }
+ case qrcodegen_Mode_ALPHANUMERIC: { static const int temp[] = { 9, 11, 13}; return temp[i]; }
+ case qrcodegen_Mode_BYTE : { static const int temp[] = { 8, 16, 16}; return temp[i]; }
+ case qrcodegen_Mode_KANJI : { static const int temp[] = { 8, 10, 12}; return temp[i]; }
+ case qrcodegen_Mode_ECI : return 0;
+ default: assert(false); return -1; // Dummy value
+ }
+}
diff --git a/panels/network/qrcodegen.h b/panels/network/qrcodegen.h
new file mode 100644
index 000000000..55e2bfecf
--- /dev/null
+++ b/panels/network/qrcodegen.h
@@ -0,0 +1,311 @@
+/*
+ * QR Code generator library (C)
+ *
+ * Copyright (c) Project Nayuki. (MIT License)
+ * https://www.nayuki.io/page/qr-code-generator-library
+ *
+ * Permission is hereby granted, free of charge, to any person obtaining a copy of
+ * this software and associated documentation files (the "Software"), to deal in
+ * the Software without restriction, including without limitation the rights to
+ * use, copy, modify, merge, publish, distribute, sublicense, and/or sell copies of
+ * the Software, and to permit persons to whom the Software is furnished to do so,
+ * subject to the following conditions:
+ * - The above copyright notice and this permission notice shall be included in
+ * all copies or substantial portions of the Software.
+ * - The Software is provided "as is", without warranty of any kind, express or
+ * implied, including but not limited to the warranties of merchantability,
+ * fitness for a particular purpose and noninfringement. In no event shall the
+ * authors or copyright holders be liable for any claim, damages or other
+ * liability, whether in an action of contract, tort or otherwise, arising from,
+ * out of or in connection with the Software or the use or other dealings in the
+ * Software.
+ */
+
+#pragma once
+
+#include <stdbool.h>
+#include <stddef.h>
+#include <stdint.h>
+
+
+#ifdef __cplusplus
+extern "C" {
+#endif
+
+
+/*
+ * This library creates QR Code symbols, which is a type of two-dimension barcode.
+ * Invented by Denso Wave and described in the ISO/IEC 18004 standard.
+ * A QR Code structure is an immutable square grid of black and white cells.
+ * The library provides functions to create a QR Code from text or binary data.
+ * The library covers the QR Code Model 2 specification, supporting all versions (sizes)
+ * from 1 to 40, all 4 error correction levels, and 4 character encoding modes.
+ *
+ * Ways to create a QR Code object:
+ * - High level: Take the payload data and call qrcodegen_encodeText() or qrcodegen_encodeBinary().
+ * - Low level: Custom-make the list of segments and call
+ * qrcodegen_encodeSegments() or qrcodegen_encodeSegmentsAdvanced().
+ * (Note that all ways require supplying the desired error correction level and various byte buffers.)
+ */
+
+
+/*---- Enum and struct types----*/
+
+/*
+ * The error correction level in a QR Code symbol.
+ */
+enum qrcodegen_Ecc {
+ // Must be declared in ascending order of error protection
+ // so that an internal qrcodegen function works properly
+ qrcodegen_Ecc_LOW = 0 , // The QR Code can tolerate about 7% erroneous codewords
+ qrcodegen_Ecc_MEDIUM , // The QR Code can tolerate about 15% erroneous codewords
+ qrcodegen_Ecc_QUARTILE, // The QR Code can tolerate about 25% erroneous codewords
+ qrcodegen_Ecc_HIGH , // The QR Code can tolerate about 30% erroneous codewords
+};
+
+
+/*
+ * The mask pattern used in a QR Code symbol.
+ */
+enum qrcodegen_Mask {
+ // A special value to tell the QR Code encoder to
+ // automatically select an appropriate mask pattern
+ qrcodegen_Mask_AUTO = -1,
+ // The eight actual mask patterns
+ qrcodegen_Mask_0 = 0,
+ qrcodegen_Mask_1,
+ qrcodegen_Mask_2,
+ qrcodegen_Mask_3,
+ qrcodegen_Mask_4,
+ qrcodegen_Mask_5,
+ qrcodegen_Mask_6,
+ qrcodegen_Mask_7,
+};
+
+
+/*
+ * Describes how a segment's data bits are interpreted.
+ */
+enum qrcodegen_Mode {
+ qrcodegen_Mode_NUMERIC = 0x1,
+ qrcodegen_Mode_ALPHANUMERIC = 0x2,
+ qrcodegen_Mode_BYTE = 0x4,
+ qrcodegen_Mode_KANJI = 0x8,
+ qrcodegen_Mode_ECI = 0x7,
+};
+
+
+/*
+ * A segment of character/binary/control data in a QR Code symbol.
+ * The mid-level way to create a segment is to take the payload data
+ * and call a factory function such as qrcodegen_makeNumeric().
+ * The low-level way to create a segment is to custom-make the bit buffer
+ * and initialize a qrcodegen_Segment struct with appropriate values.
+ * Even in the most favorable conditions, a QR Code can only hold 7089 characters of data.
+ * Any segment longer than this is meaningless for the purpose of generating QR Codes.
+ * Moreover, the maximum allowed bit length is 32767 because
+ * the largest QR Code (version 40) has 31329 modules.
+ */
+struct qrcodegen_Segment {
+ // The mode indicator of this segment.
+ enum qrcodegen_Mode mode;
+
+ // The length of this segment's unencoded data. Measured in characters for
+ // numeric/alphanumeric/kanji mode, bytes for byte mode, and 0 for ECI mode.
+ // Always zero or positive. Not the same as the data's bit length.
+ int numChars;
+
+ // The data bits of this segment, packed in bitwise big endian.
+ // Can be null if the bit length is zero.
+ uint8_t *data;
+
+ // The number of valid data bits used in the buffer. Requires
+ // 0 <= bitLength <= 32767, and bitLength <= (capacity of data array) * 8.
+ // The character count (numChars) must agree with the mode and the bit buffer length.
+ int bitLength;
+};
+
+
+
+/*---- Macro constants and functions ----*/
+
+#define qrcodegen_VERSION_MIN 1 // The minimum version number supported in the QR Code Model 2 standard
+#define qrcodegen_VERSION_MAX 40 // The maximum version number supported in the QR Code Model 2 standard
+
+// Calculates the number of bytes needed to store any QR Code up to and including the given version number,
+// as a compile-time constant. For example, 'uint8_t buffer[qrcodegen_BUFFER_LEN_FOR_VERSION(25)];'
+// can store any single QR Code from version 1 to 25 (inclusive). The result fits in an int (or int16).
+// Requires qrcodegen_VERSION_MIN <= n <= qrcodegen_VERSION_MAX.
+#define qrcodegen_BUFFER_LEN_FOR_VERSION(n) ((((n) * 4 + 17) * ((n) * 4 + 17) + 7) / 8 + 1)
+
+// The worst-case number of bytes needed to store one QR Code, up to and including
+// version 40. This value equals 3918, which is just under 4 kilobytes.
+// Use this more convenient value to avoid calculating tighter memory bounds for buffers.
+#define qrcodegen_BUFFER_LEN_MAX qrcodegen_BUFFER_LEN_FOR_VERSION(qrcodegen_VERSION_MAX)
+
+
+
+/*---- Functions (high level) to generate QR Codes ----*/
+
+/*
+ * Encodes the given text string to a QR Code, returning true if encoding succeeded.
+ * If the data is too long to fit in any version in the given range
+ * at the given ECC level, then false is returned.
+ * - The input text must be encoded in UTF-8 and contain no NULs.
+ * - The variables ecl and mask must correspond to enum constant values.
+ * - Requires 1 <= minVersion <= maxVersion <= 40.
+ * - The arrays tempBuffer and qrcode must each have a length
+ * of at least qrcodegen_BUFFER_LEN_FOR_VERSION(maxVersion).
+ * - After the function returns, tempBuffer contains no useful data.
+ * - If successful, the resulting QR Code may use numeric,
+ * alphanumeric, or byte mode to encode the text.
+ * - In the most optimistic case, a QR Code at version 40 with low ECC
+ * can hold any UTF-8 string up to 2953 bytes, or any alphanumeric string
+ * up to 4296 characters, or any digit string up to 7089 characters.
+ * These numbers represent the hard upper limit of the QR Code standard.
+ * - Please consult the QR Code specification for information on
+ * data capacities per version, ECC level, and text encoding mode.
+ */
+bool qrcodegen_encodeText(const char *text, uint8_t tempBuffer[], uint8_t qrcode[],
+ enum qrcodegen_Ecc ecl, int minVersion, int maxVersion, enum qrcodegen_Mask mask, bool boostEcl);
+
+
+/*
+ * Encodes the given binary data to a QR Code, returning true if encoding succeeded.
+ * If the data is too long to fit in any version in the given range
+ * at the given ECC level, then false is returned.
+ * - The input array range dataAndTemp[0 : dataLen] should normally be
+ * valid UTF-8 text, but is not required by the QR Code standard.
+ * - The variables ecl and mask must correspond to enum constant values.
+ * - Requires 1 <= minVersion <= maxVersion <= 40.
+ * - The arrays dataAndTemp and qrcode must each have a length
+ * of at least qrcodegen_BUFFER_LEN_FOR_VERSION(maxVersion).
+ * - After the function returns, the contents of dataAndTemp may have changed,
+ * and does not represent useful data anymore.
+ * - If successful, the resulting QR Code will use byte mode to encode the data.
+ * - In the most optimistic case, a QR Code at version 40 with low ECC can hold any byte
+ * sequence up to length 2953. This is the hard upper limit of the QR Code standard.
+ * - Please consult the QR Code specification for information on
+ * data capacities per version, ECC level, and text encoding mode.
+ */
+bool qrcodegen_encodeBinary(uint8_t dataAndTemp[], size_t dataLen, uint8_t qrcode[],
+ enum qrcodegen_Ecc ecl, int minVersion, int maxVersion, enum qrcodegen_Mask mask, bool boostEcl);
+
+
+/*---- Functions (low level) to generate QR Codes ----*/
+
+/*
+ * Renders a QR Code representing the given segments at the given error correction level.
+ * The smallest possible QR Code version is automatically chosen for the output. Returns true if
+ * QR Code creation succeeded, or false if the data is too long to fit in any version. The ECC level
+ * of the result may be higher than the ecl argument if it can be done without increasing the version.
+ * This function allows the user to create a custom sequence of segments that switches
+ * between modes (such as alphanumeric and byte) to encode text in less space.
+ * This is a low-level API; the high-level API is qrcodegen_encodeText() and qrcodegen_encodeBinary().
+ * To save memory, the segments' data buffers can alias/overlap tempBuffer, and will
+ * result in them being clobbered, but the QR Code output will still be correct.
+ * But the qrcode array must not overlap tempBuffer or any segment's data buffer.
+ */
+bool qrcodegen_encodeSegments(const struct qrcodegen_Segment segs[], size_t len,
+ enum qrcodegen_Ecc ecl, uint8_t tempBuffer[], uint8_t qrcode[]);
+
+
+/*
+ * Renders a QR Code representing the given segments with the given encoding parameters.
+ * Returns true if QR Code creation succeeded, or false if the data is too long to fit in the range of
versions.
+ * The smallest possible QR Code version within the given range is automatically
+ * chosen for the output. Iff boostEcl is true, then the ECC level of the result
+ * may be higher than the ecl argument if it can be done without increasing the
+ * version. The mask number is either between 0 to 7 (inclusive) to force that
+ * mask, or -1 to automatically choose an appropriate mask (which may be slow).
+ * This function allows the user to create a custom sequence of segments that switches
+ * between modes (such as alphanumeric and byte) to encode text in less space.
+ * This is a low-level API; the high-level API is qrcodegen_encodeText() and qrcodegen_encodeBinary().
+ * To save memory, the segments' data buffers can alias/overlap tempBuffer, and will
+ * result in them being clobbered, but the QR Code output will still be correct.
+ * But the qrcode array must not overlap tempBuffer or any segment's data buffer.
+ */
+bool qrcodegen_encodeSegmentsAdvanced(const struct qrcodegen_Segment segs[], size_t len, enum qrcodegen_Ecc
ecl,
+ int minVersion, int maxVersion, int mask, bool boostEcl, uint8_t tempBuffer[], uint8_t qrcode[]);
+
+
+/*
+ * Tests whether the given string can be encoded as a segment in alphanumeric mode.
+ * A string is encodable iff each character is in the following set: 0 to 9, A to Z
+ * (uppercase only), space, dollar, percent, asterisk, plus, hyphen, period, slash, colon.
+ */
+bool qrcodegen_isAlphanumeric(const char *text);
+
+
+/*
+ * Tests whether the given string can be encoded as a segment in numeric mode.
+ * A string is encodable iff each character is in the range 0 to 9.
+ */
+bool qrcodegen_isNumeric(const char *text);
+
+
+/*
+ * Returns the number of bytes (uint8_t) needed for the data buffer of a segment
+ * containing the given number of characters using the given mode. Notes:
+ * - Returns SIZE_MAX on failure, i.e. numChars > INT16_MAX or
+ * the number of needed bits exceeds INT16_MAX (i.e. 32767).
+ * - Otherwise, all valid results are in the range [0, ceil(INT16_MAX / 8)], i.e. at most 4096.
+ * - It is okay for the user to allocate more bytes for the buffer than needed.
+ * - For byte mode, numChars measures the number of bytes, not Unicode code points.
+ * - For ECI mode, numChars must be 0, and the worst-case number of bytes is returned.
+ * An actual ECI segment can have shorter data. For non-ECI modes, the result is exact.
+ */
+size_t qrcodegen_calcSegmentBufferSize(enum qrcodegen_Mode mode, size_t numChars);
+
+
+/*
+ * Returns a segment representing the given binary data encoded in
+ * byte mode. All input byte arrays are acceptable. Any text string
+ * can be converted to UTF-8 bytes and encoded as a byte mode segment.
+ */
+struct qrcodegen_Segment qrcodegen_makeBytes(const uint8_t data[], size_t len, uint8_t buf[]);
+
+
+/*
+ * Returns a segment representing the given string of decimal digits encoded in numeric mode.
+ */
+struct qrcodegen_Segment qrcodegen_makeNumeric(const char *digits, uint8_t buf[]);
+
+
+/*
+ * Returns a segment representing the given text string encoded in alphanumeric mode.
+ * The characters allowed are: 0 to 9, A to Z (uppercase only), space,
+ * dollar, percent, asterisk, plus, hyphen, period, slash, colon.
+ */
+struct qrcodegen_Segment qrcodegen_makeAlphanumeric(const char *text, uint8_t buf[]);
+
+
+/*
+ * Returns a segment representing an Extended Channel Interpretation
+ * (ECI) designator with the given assignment value.
+ */
+struct qrcodegen_Segment qrcodegen_makeEci(long assignVal, uint8_t buf[]);
+
+
+/*---- Functions to extract raw data from QR Codes ----*/
+
+/*
+ * Returns the side length of the given QR Code, assuming that encoding succeeded.
+ * The result is in the range [21, 177]. Note that the length of the array buffer
+ * is related to the side length - every 'uint8_t qrcode[]' must have length at least
+ * qrcodegen_BUFFER_LEN_FOR_VERSION(version), which equals ceil(size^2 / 8 + 1).
+ */
+int qrcodegen_getSize(const uint8_t qrcode[]);
+
+
+/*
+ * Returns the color of the module (pixel) at the given coordinates, which is false
+ * for white or true for black. The top left corner has the coordinates (x=0, y=0).
+ * If the given coordinates are out of bounds, then false (white) is returned.
+ */
+bool qrcodegen_getModule(const uint8_t qrcode[], int x, int y);
+
+
+#ifdef __cplusplus
+}
+#endif
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