[gnome-games] playstation: Add get_playstation_info()

[Adrien Plazas <aplazas src gnome org>]

commit 07419cfc5cf51b249f8b8a6ff1df10aeee37fa8e
Author: Adrien Plazas <kekun plazas laposte net>
Date:   Sat Jul 15 11:41:48 2017 +0200

    playstation: Add get_playstation_info()
    
    This will be used in the next commit to parse PlayStation disc images.
    
    https://bugzilla.gnome.org/show_bug.cgi?id=775255

 plugins/playstation/src/Makefile.am              |    1 +
 plugins/playstation/src/playstation-disc-image.c |  225 ++++++++++++++++++++++
 2 files changed, 226 insertions(+), 0 deletions(-)
---
diff --git a/plugins/playstation/src/Makefile.am b/plugins/playstation/src/Makefile.am
index 6d82754..868c889 100644
--- a/plugins/playstation/src/Makefile.am
+++ b/plugins/playstation/src/Makefile.am
@@ -39,6 +39,7 @@ libgames_playstation_plugin_la_SOURCES = \
        disc-file-info.c \
        disc-image.c \
        disc-image-time.c \
+       playstation-disc-image.c \
        playstation-error.vala \
        playstation-game-factory.vala \
        playstation-header.vala \
diff --git a/plugins/playstation/src/playstation-disc-image.c 
b/plugins/playstation/src/playstation-disc-image.c
new file mode 100644
index 0000000..7e7b489
--- /dev/null
+++ b/plugins/playstation/src/playstation-disc-image.c
@@ -0,0 +1,225 @@
+// This file is part of GNOME Games. License: GPL-3.0+.
+
+#include <string.h>
+#include <stdio.h>
+#include "disc-image.h"
+
+#define SYSTEM_CNF "SYSTEM.CNF;1"
+#define PSX_EXE "PSX.EXE;1"
+
+typedef struct _PlayStationGamesDiscInfo {
+  gchar *label;
+  gchar *exe;
+} PlayStationGamesDiscInfo;
+
+static gboolean
+games_disc_image_get_playstation_info (GamesDiscImage            *disc,
+                                       PlayStationGamesDiscInfo  *games_disc_image_info,
+                                       GCancellable              *cancellable,
+                                       GError                   **error)
+{
+  gchar label_buffer[33] = "";
+
+  GamesDiscFileInfo *dir;
+  GamesDiscImageTime time;
+  guchar mdir[4096];
+  gchar exe_buffer[256];
+  gint i, len, c;
+  gchar *ptr;
+  GamesDiscFrame frame;
+  gboolean success;
+  GError *tmp_error = NULL;
+
+  games_disc_image_time_set_minute_second_frame (&time, 0, 2, 0x10);
+  success = games_disc_image_read_frame (disc, &time, &frame, cancellable, &tmp_error);
+  if (tmp_error != NULL) {
+    g_propagate_error (error, tmp_error);
+
+    return FALSE;
+  }
+
+  if (!success)
+    return FALSE;
+
+  memset (label_buffer, 0, sizeof (label_buffer));
+  memset (exe_buffer, 0, sizeof (exe_buffer));
+
+  strncpy (label_buffer, (const char *) frame.mode2.content + 52, 32);
+
+  // Skip head and sub, and go to the root directory record
+  dir = (GamesDiscFileInfo *) (frame.mode1.content + 156);
+
+  games_disc_image_time_set_from_time_reference (&time, dir->extent);
+
+  success = games_disc_image_read_directory (disc, &time, mdir, cancellable, &tmp_error);
+  if (tmp_error != NULL) {
+    g_propagate_error (error, tmp_error);
+
+    return FALSE;
+  }
+
+  if (!success)
+    return FALSE;
+
+  // Look for ststem configuration.
+
+  success = games_disc_image_get_file (disc, (GamesDiscFileInfo *) mdir, SYSTEM_CNF, &time, cancellable, 
&tmp_error);
+  if (tmp_error != NULL) {
+    g_propagate_error (error, tmp_error);
+
+    return FALSE;
+  }
+
+  if (success) {
+    if (!games_disc_image_read_frame (disc, &time, &frame, cancellable, &tmp_error))
+      return FALSE;
+
+    if (tmp_error != NULL) {
+      g_propagate_error (error, tmp_error);
+
+      return FALSE;
+    }
+
+    // Look of "BOOT = cdrom:\\"
+
+    sscanf ((char *) frame.mode1.content, "BOOT = cdrom:\\%255s", exe_buffer);
+    success = games_disc_image_get_file (disc, (GamesDiscFileInfo *) mdir, exe_buffer, &time, cancellable, 
&tmp_error);
+    if (tmp_error != NULL) {
+      g_propagate_error (error, tmp_error);
+
+      return FALSE;
+    }
+
+    if (success) {
+      if (games_disc_image_info != NULL) {
+        games_disc_image_info->label = strndup (label_buffer, sizeof (label_buffer));
+        games_disc_image_info->exe = strndup (exe_buffer, sizeof (exe_buffer));
+      }
+
+      return TRUE;
+    }
+
+    // Look of "BOOT = cdrom:"
+
+    sscanf ((char *) frame.mode1.content, "BOOT = cdrom:%255s", exe_buffer);
+    success = games_disc_image_get_file (disc, (GamesDiscFileInfo *) mdir, exe_buffer, &time, cancellable, 
&tmp_error);
+    if (tmp_error != NULL) {
+      g_propagate_error (error, tmp_error);
+
+      return FALSE;
+    }
+
+    if (success) {
+      if (games_disc_image_info != NULL) {
+        games_disc_image_info->label = strndup (label_buffer, sizeof (label_buffer));
+        games_disc_image_info->exe = strndup (exe_buffer, sizeof (exe_buffer));
+      }
+
+      return TRUE;
+    }
+
+    // Look of "cdrom:"
+
+    ptr = strstr((gchar *) frame.mode1.content, "cdrom:"); // Possibly the executable is in some subdir.
+    if (ptr == NULL)
+      return FALSE;
+
+    // Skip "cdrom:".
+    ptr += 6;
+
+    // Skip slashes.
+    while (*ptr == '\\' || *ptr == '/')
+      ptr++;
+
+    strncpy (exe_buffer, ptr, 255);
+    exe_buffer[255] = '\0';
+    ptr = exe_buffer;
+
+    // Keep only the first line.
+    while (*ptr != '\0' && *ptr != '\r' && *ptr != '\n')
+      ptr++;
+    *ptr = '\0';
+
+    success = games_disc_image_get_file (disc, (GamesDiscFileInfo *) mdir, exe_buffer, &time, cancellable, 
&tmp_error);
+    if (tmp_error != NULL) {
+      g_propagate_error (error, tmp_error);
+
+      return FALSE;
+    }
+
+    if (success) {
+      if (games_disc_image_info != NULL) {
+        games_disc_image_info->label = strndup (label_buffer, sizeof (label_buffer));
+        games_disc_image_info->exe = strndup (exe_buffer, sizeof (exe_buffer));
+      }
+
+      return TRUE;
+    }
+
+    return FALSE;
+  }
+
+  // Look for the default executable.
+
+  success = games_disc_image_get_file (disc, (GamesDiscFileInfo *) mdir, PSX_EXE, &time, cancellable, 
&tmp_error);
+  if (tmp_error != NULL) {
+    g_propagate_error (error, tmp_error);
+
+    return FALSE;
+  }
+
+  if (success) {
+    if (games_disc_image_info != NULL) {
+      games_disc_image_info->label = strndup (label_buffer, sizeof (label_buffer));
+      games_disc_image_info->exe = strndup (PSX_EXE, sizeof (PSX_EXE));
+    }
+
+    return TRUE;
+  }
+
+  // SYSTEM.CNF and PSX.EXE not found.
+
+  return FALSE;
+}
+
+gboolean
+get_playstation_info (const gchar   *image_filename,
+                      gchar        **label,
+                      gchar        **exe,
+                      GCancellable  *cancellable,
+                      GError       **error)
+{
+  GamesDiscImage disc = { 0 };
+  gboolean success;
+  GError *tmp_error = NULL;
+
+  games_disc_image_open (&disc, image_filename, &tmp_error);
+  if (tmp_error != NULL) {
+    g_debug ("%s", tmp_error->message);
+    g_error_free (tmp_error);
+    games_disc_image_dispose (&disc);
+
+    return FALSE;
+  }
+
+  PlayStationGamesDiscInfo games_disc_image_info = { 0 };
+  success = games_disc_image_get_playstation_info (&disc, &games_disc_image_info, cancellable, &tmp_error);
+  if (tmp_error != NULL) {
+    g_debug ("%s", tmp_error->message);
+    g_error_free (tmp_error);
+    games_disc_image_dispose (&disc);
+
+    return FALSE;
+  }
+
+  games_disc_image_dispose (&disc);
+
+  if (success) {
+    *label = games_disc_image_info.label;
+    *exe = games_disc_image_info.exe;
+
+    return TRUE;
+  }
+
+  return FALSE;
+}