[vte] parser: Import new parser
- From: Christian Persch <chpe src gnome org>
- To: commits-list gnome org
- Cc:
- Subject: [vte] parser: Import new parser
- Date: Tue, 27 Mar 2018 17:41:17 +0000 (UTC)
commit 032a5c6622ff9ae8131a39c52623e595a2c94f54
Author: Christian Persch <chpe src gnome org>
Date: Tue Mar 27 19:40:12 2018 +0200
parser: Import new parser
COPYING.GPL3 | 675 ++++++++++++++++++++
COPYING => COPYING.LGPL2 | 0
COPYING.LGPL3 | 165 +++++
Makefile.am | 3 +
src/parser.cc | 1578 ++++++++++++++++++++++++++++++++++++++++++++++
src/parser.hh | 362 +++++++++++
6 files changed, 2783 insertions(+), 0 deletions(-)
---
diff --git a/COPYING.GPL3 b/COPYING.GPL3
new file mode 100644
index 0000000..24afbe2
--- /dev/null
+++ b/COPYING.GPL3
@@ -0,0 +1,675 @@
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+ IN NO EVENT UNLESS REQUIRED BY APPLICABLE LAW OR AGREED TO IN WRITING
+WILL ANY COPYRIGHT HOLDER, OR ANY OTHER PARTY WHO MODIFIES AND/OR CONVEYS
+THE PROGRAM AS PERMITTED ABOVE, BE LIABLE TO YOU FOR DAMAGES, INCLUDING ANY
+GENERAL, SPECIAL, INCIDENTAL OR CONSEQUENTIAL DAMAGES ARISING OUT OF THE
+USE OR INABILITY TO USE THE PROGRAM (INCLUDING BUT NOT LIMITED TO LOSS OF
+DATA OR DATA BEING RENDERED INACCURATE OR LOSSES SUSTAINED BY YOU OR THIRD
+PARTIES OR A FAILURE OF THE PROGRAM TO OPERATE WITH ANY OTHER PROGRAMS),
+EVEN IF SUCH HOLDER OR OTHER PARTY HAS BEEN ADVISED OF THE POSSIBILITY OF
+SUCH DAMAGES.
+
+ 17. Interpretation of Sections 15 and 16.
+
+ If the disclaimer of warranty and limitation of liability provided
+above cannot be given local legal effect according to their terms,
+reviewing courts shall apply local law that most closely approximates
+an absolute waiver of all civil liability in connection with the
+Program, unless a warranty or assumption of liability accompanies a
+copy of the Program in return for a fee.
+
+ END OF TERMS AND CONDITIONS
+
+ How to Apply These Terms to Your New Programs
+
+ If you develop a new program, and you want it to be of the greatest
+possible use to the public, the best way to achieve this is to make it
+free software which everyone can redistribute and change under these terms.
+
+ To do so, attach the following notices to the program. It is safest
+to attach them to the start of each source file to most effectively
+state the exclusion of warranty; and each file should have at least
+the "copyright" line and a pointer to where the full notice is found.
+
+ <one line to give the program's name and a brief idea of what it does.>
+ Copyright (C) <year> <name of author>
+
+ 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/>.
+
+Also add information on how to contact you by electronic and paper mail.
+
+ If the program does terminal interaction, make it output a short
+notice like this when it starts in an interactive mode:
+
+ <program> Copyright (C) <year> <name of author>
+ This program comes with ABSOLUTELY NO WARRANTY; for details type `show w'.
+ This is free software, and you are welcome to redistribute it
+ under certain conditions; type `show c' for details.
+
+The hypothetical commands `show w' and `show c' should show the appropriate
+parts of the General Public License. Of course, your program's commands
+might be different; for a GUI interface, you would use an "about box".
+
+ You should also get your employer (if you work as a programmer) or school,
+if any, to sign a "copyright disclaimer" for the program, if necessary.
+For more information on this, and how to apply and follow the GNU GPL, see
+<http://www.gnu.org/licenses/>.
+
+ The GNU General Public License does not permit incorporating your program
+into proprietary programs. If your program is a subroutine library, you
+may consider it more useful to permit linking proprietary applications with
+the library. If this is what you want to do, use the GNU Lesser General
+Public License instead of this License. But first, please read
+<http://www.gnu.org/philosophy/why-not-lgpl.html>.
diff --git a/COPYING b/COPYING.LGPL2
similarity index 100%
rename from COPYING
rename to COPYING.LGPL2
diff --git a/COPYING.LGPL3 b/COPYING.LGPL3
new file mode 100644
index 0000000..cca7fc2
--- /dev/null
+++ b/COPYING.LGPL3
@@ -0,0 +1,165 @@
+ GNU LESSER GENERAL PUBLIC LICENSE
+ Version 3, 29 June 2007
+
+ Copyright (C) 2007 Free Software Foundation, Inc. <http://fsf.org/>
+ Everyone is permitted to copy and distribute verbatim copies
+ of this license document, but changing it is not allowed.
+
+
+ This version of the GNU Lesser General Public License incorporates
+the terms and conditions of version 3 of the GNU General Public
+License, supplemented by the additional permissions listed below.
+
+ 0. Additional Definitions.
+
+ As used herein, "this License" refers to version 3 of the GNU Lesser
+General Public License, and the "GNU GPL" refers to version 3 of the GNU
+General Public License.
+
+ "The Library" refers to a covered work governed by this License,
+other than an Application or a Combined Work as defined below.
+
+ An "Application" is any work that makes use of an interface provided
+by the Library, but which is not otherwise based on the Library.
+Defining a subclass of a class defined by the Library is deemed a mode
+of using an interface provided by the Library.
+
+ A "Combined Work" is a work produced by combining or linking an
+Application with the Library. The particular version of the Library
+with which the Combined Work was made is also called the "Linked
+Version".
+
+ The "Minimal Corresponding Source" for a Combined Work means the
+Corresponding Source for the Combined Work, excluding any source code
+for portions of the Combined Work that, considered in isolation, are
+based on the Application, and not on the Linked Version.
+
+ The "Corresponding Application Code" for a Combined Work means the
+object code and/or source code for the Application, including any data
+and utility programs needed for reproducing the Combined Work from the
+Application, but excluding the System Libraries of the Combined Work.
+
+ 1. Exception to Section 3 of the GNU GPL.
+
+ You may convey a covered work under sections 3 and 4 of this License
+without being bound by section 3 of the GNU GPL.
+
+ 2. Conveying Modified Versions.
+
+ If you modify a copy of the Library, and, in your modifications, a
+facility refers to a function or data to be supplied by an Application
+that uses the facility (other than as an argument passed when the
+facility is invoked), then you may convey a copy of the modified
+version:
+
+ a) under this License, provided that you make a good faith effort to
+ ensure that, in the event an Application does not supply the
+ function or data, the facility still operates, and performs
+ whatever part of its purpose remains meaningful, or
+
+ b) under the GNU GPL, with none of the additional permissions of
+ this License applicable to that copy.
+
+ 3. Object Code Incorporating Material from Library Header Files.
+
+ The object code form of an Application may incorporate material from
+a header file that is part of the Library. You may convey such object
+code under terms of your choice, provided that, if the incorporated
+material is not limited to numerical parameters, data structure
+layouts and accessors, or small macros, inline functions and templates
+(ten or fewer lines in length), you do both of the following:
+
+ a) Give prominent notice with each copy of the object code that the
+ Library is used in it and that the Library and its use are
+ covered by this License.
+
+ b) Accompany the object code with a copy of the GNU GPL and this license
+ document.
+
+ 4. Combined Works.
+
+ You may convey a Combined Work under terms of your choice that,
+taken together, effectively do not restrict modification of the
+portions of the Library contained in the Combined Work and reverse
+engineering for debugging such modifications, if you also do each of
+the following:
+
+ a) Give prominent notice with each copy of the Combined Work that
+ the Library is used in it and that the Library and its use are
+ covered by this License.
+
+ b) Accompany the Combined Work with a copy of the GNU GPL and this license
+ document.
+
+ c) For a Combined Work that displays copyright notices during
+ execution, include the copyright notice for the Library among
+ these notices, as well as a reference directing the user to the
+ copies of the GNU GPL and this license document.
+
+ d) Do one of the following:
+
+ 0) Convey the Minimal Corresponding Source under the terms of this
+ License, and the Corresponding Application Code in a form
+ suitable for, and under terms that permit, the user to
+ recombine or relink the Application with a modified version of
+ the Linked Version to produce a modified Combined Work, in the
+ manner specified by section 6 of the GNU GPL for conveying
+ Corresponding Source.
+
+ 1) Use a suitable shared library mechanism for linking with the
+ Library. A suitable mechanism is one that (a) uses at run time
+ a copy of the Library already present on the user's computer
+ system, and (b) will operate properly with a modified version
+ of the Library that is interface-compatible with the Linked
+ Version.
+
+ e) Provide Installation Information, but only if you would otherwise
+ be required to provide such information under section 6 of the
+ GNU GPL, and only to the extent that such information is
+ necessary to install and execute a modified version of the
+ Combined Work produced by recombining or relinking the
+ Application with a modified version of the Linked Version. (If
+ you use option 4d0, the Installation Information must accompany
+ the Minimal Corresponding Source and Corresponding Application
+ Code. If you use option 4d1, you must provide the Installation
+ Information in the manner specified by section 6 of the GNU GPL
+ for conveying Corresponding Source.)
+
+ 5. Combined Libraries.
+
+ You may place library facilities that are a work based on the
+Library side by side in a single library together with other library
+facilities that are not Applications and are not covered by this
+License, and convey such a combined library under terms of your
+choice, if you do both of the following:
+
+ a) Accompany the combined library with a copy of the same work based
+ on the Library, uncombined with any other library facilities,
+ conveyed under the terms of this License.
+
+ b) Give prominent notice with the combined library that part of it
+ is a work based on the Library, and explaining where to find the
+ accompanying uncombined form of the same work.
+
+ 6. Revised Versions of the GNU Lesser General Public License.
+
+ The Free Software Foundation may publish revised and/or new versions
+of the GNU Lesser General Public License from time to time. Such new
+versions will be similar in spirit to the present version, but may
+differ in detail to address new problems or concerns.
+
+ Each version is given a distinguishing version number. If the
+Library as you received it specifies that a certain numbered version
+of the GNU Lesser General Public License "or any later version"
+applies to it, you have the option of following the terms and
+conditions either of that published version or of any later version
+published by the Free Software Foundation. If the Library as you
+received it does not specify a version number of the GNU Lesser
+General Public License, you may choose any version of the GNU Lesser
+General Public License ever published by the Free Software Foundation.
+
+ If the Library as you received it specifies that a proxy can decide
+whether future versions of the GNU Lesser General Public License shall
+apply, that proxy's public statement of acceptance of any version is
+permanent authorization for you to choose that version for the
+Library.
diff --git a/Makefile.am b/Makefile.am
index 10c9c93..8146a8f 100644
--- a/Makefile.am
+++ b/Makefile.am
@@ -5,6 +5,9 @@ ACLOCAL_AMFLAGS = -I m4
SUBDIRS = src bindings po doc perf
EXTRA_DIST = \
+ COPYING.GPL3 \
+ COPYING.LGPL2 \
+ COPYING.LGPL3 \
HACKING \
autogen.sh \
ChangeLog.pre-git \
diff --git a/src/parser.cc b/src/parser.cc
new file mode 100644
index 0000000..c06d51d
--- /dev/null
+++ b/src/parser.cc
@@ -0,0 +1,1578 @@
+/*
+ * Copyright © 2015 David Herrmann <dh herrmann gmail com>
+ *
+ * vte is free software; you can redistribute it and/or modify it under
+ * the terms of the GNU Lesser General Public License as published by the
+ * Free Software Foundation; either version 3 of the License, or (at
+ * your option) any later version.
+ */
+
+#include "config.h"
+
+#include <cstdio>
+#include <cstring>
+#include <cstdlib>
+#include <cerrno>
+
+//#include <linux/bitops.h>
+//#include <linux/kernel.h>
+//#include <linux/slab.h>
+#include "parser.hh"
+
+#define WARN(num,str) do { } while (0)
+#define hweight32(v) (__builtin_popcount(v))
+#define kzalloc(n,v) calloc((n),1)
+#define kfree(ptr) free(ptr)
+
+/*
+ * Terminal Parser
+ * This file contains a bunch of UTF-8 helpers and the main ctlseq-parser. The
+ * parser is a simple state-machine that correctly parses all CSI, DCS, OSC, ST
+ * control sequences and generic escape sequences.
+ * The parser itself does not perform any actions but lets the caller react to
+ * detected sequences.
+ */
+
+#define VTE_PARSER_ST_MAX (4096)
+
+struct vte_parser {
+ struct vte_seq seq;
+ size_t st_alloc;
+ unsigned int state;
+};
+
+/*
+ * Command Parser
+ * The ctl-seq parser "vte_parser" only detects whole sequences, it does not
+ * detect the specific command. Once a sequence is parsed, the command-parsers
+ * are used to figure out their meaning.
+ */
+
+static unsigned int vte_parse_host_control(const struct vte_seq *seq)
+{
+ switch (seq->terminator) {
+ case 0x00: /* NUL */
+ return VTE_CMD_NULL;
+ case 0x05: /* ENQ */
+ return VTE_CMD_ENQ;
+ case 0x07: /* BEL */
+ return VTE_CMD_BEL;
+ case 0x08: /* BS */
+ return VTE_CMD_BS;
+ case 0x09: /* HT */
+ return VTE_CMD_HT;
+ case 0x0a: /* LF */
+ return VTE_CMD_LF;
+ case 0x0b: /* VT */
+ return VTE_CMD_VT;
+ case 0x0c: /* FF */
+ return VTE_CMD_FF;
+ case 0x0d: /* CR */
+ return VTE_CMD_CR;
+ case 0x0e: /* SO */
+ return VTE_CMD_SO;
+ case 0x0f: /* SI */
+ return VTE_CMD_SI;
+ case 0x11: /* DC1 */
+ return VTE_CMD_DC1;
+ case 0x13: /* DC3 */
+ return VTE_CMD_DC3;
+ case 0x18: /* CAN */
+ /* this is already handled by the state-machine */
+ break;
+ case 0x1a: /* SUB */
+ return VTE_CMD_SUB;
+ case 0x1b: /* ESC */
+ /* this is already handled by the state-machine */
+ break;
+ case 0x1f: /* DEL */
+ /* this is already handled by the state-machine */
+ break;
+ case 0x84: /* IND */
+ return VTE_CMD_IND;
+ case 0x85: /* NEL */
+ return VTE_CMD_NEL;
+ case 0x88: /* HTS */
+ return VTE_CMD_HTS;
+ case 0x8d: /* RI */
+ return VTE_CMD_RI;
+ case 0x8e: /* SS2 */
+ return VTE_CMD_SS2;
+ case 0x8f: /* SS3 */
+ return VTE_CMD_SS3;
+ case 0x90: /* DCS */
+ /* this is already handled by the state-machine */
+ break;
+ case 0x96: /* SPA */
+ return VTE_CMD_SPA;
+ case 0x97: /* EPA */
+ return VTE_CMD_EPA;
+ case 0x98: /* SOS */
+ /* this is already handled by the state-machine */
+ break;
+ case 0x9a: /* DECID */
+ return VTE_CMD_DECID;
+ case 0x9b: /* CSI */
+ /* this is already handled by the state-machine */
+ break;
+ case 0x9c: /* ST */
+ return VTE_CMD_ST;
+ case 0x9d: /* OSC */
+ /* this is already handled by the state-machine */
+ break;
+ case 0x9e: /* PM */
+ /* this is already handled by the state-machine */
+ break;
+ case 0x9f: /* APC */
+ /* this is already handled by the state-machine */
+ break;
+ }
+
+ return VTE_CMD_NONE;
+}
+
+static int vte_charset_from_cmd(u32 raw, unsigned int flags, bool require_96)
+{
+#if 0
+ static const struct {
+ u32 raw;
+ unsigned int flags;
+ } charset_cmds[] = {
+ /* 96-compat charsets */
+ [VTE_CHARSET_ISO_LATIN1_SUPPLEMENTAL] =
+ { .raw = 'A', .flags = 0 },
+ [VTE_CHARSET_ISO_LATIN2_SUPPLEMENTAL] =
+ { .raw = 'B', .flags = 0 },
+ [VTE_CHARSET_ISO_LATIN5_SUPPLEMENTAL] =
+ { .raw = 'M', .flags = 0 },
+ [VTE_CHARSET_ISO_GREEK_SUPPLEMENTAL] =
+ { .raw = 'F', .flags = 0 },
+ [VTE_CHARSET_ISO_HEBREW_SUPPLEMENTAL] =
+ { .raw = 'H', .flags = 0 },
+ [VTE_CHARSET_ISO_LATIN_CYRILLIC] =
+ { .raw = 'L', .flags = 0 },
+
+ /* 94-compat charsets */
+ [VTE_CHARSET_DEC_SPECIAL_GRAPHIC] =
+ { .raw = '0', .flags = 0 },
+ [VTE_CHARSET_DEC_SUPPLEMENTAL] =
+ { .raw = '5', .flags = VTE_SEQ_FLAG_PERCENT },
+ [VTE_CHARSET_DEC_TECHNICAL] =
+ { .raw = '>', .flags = 0 },
+ [VTE_CHARSET_CYRILLIC_DEC] =
+ { .raw = '4', .flags = VTE_SEQ_FLAG_AND },
+ [VTE_CHARSET_DUTCH_NRCS] =
+ { .raw = '4', .flags = 0 },
+ [VTE_CHARSET_FINNISH_NRCS] =
+ { .raw = '5', .flags = 0 },
+ [VTE_CHARSET_FRENCH_NRCS] =
+ { .raw = 'R', .flags = 0 },
+ [VTE_CHARSET_FRENCH_CANADIAN_NRCS] =
+ { .raw = '9', .flags = 0 },
+ [VTE_CHARSET_GERMAN_NRCS] =
+ { .raw = 'K', .flags = 0 },
+ [VTE_CHARSET_GREEK_DEC] =
+ { .raw = '?', .flags = VTE_SEQ_FLAG_DQUOTE },
+ [VTE_CHARSET_GREEK_NRCS] =
+ { .raw = '>', .flags = VTE_SEQ_FLAG_DQUOTE },
+ [VTE_CHARSET_HEBREW_DEC] =
+ { .raw = '4', .flags = VTE_SEQ_FLAG_DQUOTE },
+ [VTE_CHARSET_HEBREW_NRCS] =
+ { .raw = '=', .flags = VTE_SEQ_FLAG_PERCENT },
+ [VTE_CHARSET_ITALIAN_NRCS] =
+ { .raw = 'Y', .flags = 0 },
+ [VTE_CHARSET_NORWEGIAN_DANISH_NRCS] =
+ { .raw = '`', .flags = 0 },
+ [VTE_CHARSET_PORTUGUESE_NRCS] =
+ { .raw = '6', .flags = VTE_SEQ_FLAG_PERCENT },
+ [VTE_CHARSET_RUSSIAN_NRCS] =
+ { .raw = '5', .flags = VTE_SEQ_FLAG_AND },
+ [VTE_CHARSET_SCS_NRCS] =
+ { .raw = '3', .flags = VTE_SEQ_FLAG_PERCENT },
+ [VTE_CHARSET_SPANISH_NRCS] =
+ { .raw = 'Z', .flags = 0 },
+ [VTE_CHARSET_SWEDISH_NRCS] =
+ { .raw = '7', .flags = 0 },
+ [VTE_CHARSET_SWISS_NRCS] =
+ { .raw = '=', .flags = 0 },
+ [VTE_CHARSET_TURKISH_DEC] =
+ { .raw = '0', .flags = VTE_SEQ_FLAG_PERCENT },
+ [VTE_CHARSET_TURKISH_NRCS] =
+ { .raw = '2', .flags = VTE_SEQ_FLAG_PERCENT },
+
+ /* special charsets */
+ [VTE_CHARSET_USERPREF_SUPPLEMENTAL] =
+ { .raw = '<', .flags = 0 },
+
+ /* secondary choices */
+ [VTE_CHARSET_N + VTE_CHARSET_FINNISH_NRCS] =
+ { .raw = 'C', .flags = 0 },
+ [VTE_CHARSET_N + VTE_CHARSET_FRENCH_NRCS] =
+ { .raw = 'f', .flags = 0 },
+ [VTE_CHARSET_N + VTE_CHARSET_FRENCH_CANADIAN_NRCS] =
+ { .raw = 'Q', .flags = 0 },
+ [VTE_CHARSET_N + VTE_CHARSET_NORWEGIAN_DANISH_NRCS] =
+ { .raw = 'E', .flags = 0 },
+ [VTE_CHARSET_N + VTE_CHARSET_SWEDISH_NRCS] =
+ /* unused; conflicts with ISO_HEBREW */
+ { .raw = 'H', .flags = 0 },
+
+ /* tertiary choices */
+ [VTE_CHARSET_N + VTE_CHARSET_N +
+ VTE_CHARSET_NORWEGIAN_DANISH_NRCS] =
+ { .raw = '6', .flags = 0 },
+ };
+ size_t i, cs;
+
+ /*
+ * Secondary choice on SWEDISH_NRCS and primary choice on
+ * ISO_HEBREW_SUPPLEMENTAL have a conflict: raw=="H", flags==0.
+ * We always choose the ISO 96-compat set, which is what VT510 does.
+ */
+
+ for (i = 0; i < ARRAY_SIZE(charset_cmds); ++i) {
+ if (charset_cmds[i].raw == raw &&
+ charset_cmds[i].flags == flags) {
+ cs = i;
+ while (cs >= VTE_CHARSET_N)
+ cs -= VTE_CHARSET_N;
+
+ if (!require_96 ||
+ cs < VTE_CHARSET_96_N ||
+ cs >= VTE_CHARSET_94_N)
+ return cs;
+ }
+ }
+#endif
+ return -ENOENT;
+}
+
+static unsigned int vte_parse_host_escape(const struct vte_seq *seq,
+ unsigned int *cs_out)
+{
+ unsigned int t, flags;
+ int cs;
+
+ flags = seq->intermediates;
+ t = VTE_SEQ_FLAG_POPEN | VTE_SEQ_FLAG_PCLOSE |
+ VTE_SEQ_FLAG_MULT | VTE_SEQ_FLAG_PLUS |
+ VTE_SEQ_FLAG_MINUS | VTE_SEQ_FLAG_DOT |
+ VTE_SEQ_FLAG_SLASH;
+
+ if (hweight32(flags & t) == 1) {
+ switch (flags & t) {
+ case VTE_SEQ_FLAG_POPEN:
+ case VTE_SEQ_FLAG_PCLOSE:
+ case VTE_SEQ_FLAG_MULT:
+ case VTE_SEQ_FLAG_PLUS:
+ cs = vte_charset_from_cmd(seq->terminator,
+ flags & ~t, false);
+ break;
+ case VTE_SEQ_FLAG_MINUS:
+ case VTE_SEQ_FLAG_DOT:
+ case VTE_SEQ_FLAG_SLASH:
+ cs = vte_charset_from_cmd(seq->terminator,
+ flags & ~t, true);
+ break;
+ default:
+ cs = -ENOENT;
+ break;
+ }
+
+ if (cs >= 0) {
+ if (cs_out)
+ *cs_out = cs;
+ return VTE_CMD_SCS;
+ }
+
+ /* looked like a charset-cmd but wasn't; continue */
+ }
+
+ switch (seq->terminator) {
+ case '3':
+ if (flags == VTE_SEQ_FLAG_HASH) /* DECDHL top-half */
+ return VTE_CMD_DECDHL_TH;
+ break;
+ case '4':
+ if (flags == VTE_SEQ_FLAG_HASH) /* DECDHL bottom-half */
+ return VTE_CMD_DECDHL_BH;
+ break;
+ case '5':
+ if (flags == VTE_SEQ_FLAG_HASH) /* DECSWL */
+ return VTE_CMD_DECSWL;
+ break;
+ case '6':
+ if (flags == 0) /* DECBI */
+ return VTE_CMD_DECBI;
+ else if (flags == VTE_SEQ_FLAG_HASH) /* DECDWL */
+ return VTE_CMD_DECDWL;
+ break;
+ case '7':
+ if (flags == 0) /* DECSC */
+ return VTE_CMD_DECSC;
+ break;
+ case '8':
+ if (flags == 0) /* DECRC */
+ return VTE_CMD_DECRC;
+ else if (flags == VTE_SEQ_FLAG_HASH) /* DECALN */
+ return VTE_CMD_DECALN;
+ break;
+ case '9':
+ if (flags == 0) /* DECFI */
+ return VTE_CMD_DECFI;
+ break;
+ case '<':
+ if (flags == 0) /* DECANM */
+ return VTE_CMD_DECANM;
+ break;
+ case '=':
+ if (flags == 0) /* DECKPAM */
+ return VTE_CMD_DECKPAM;
+ break;
+ case '>':
+ if (flags == 0) /* DECKPNM */
+ return VTE_CMD_DECKPNM;
+ break;
+ case '@':
+ if (flags == VTE_SEQ_FLAG_PERCENT) {
+ /* Select default char-set */
+ return VTE_CMD_XTERM_SDCS;
+ }
+ break;
+ case 'D':
+ if (flags == 0) /* IND */
+ return VTE_CMD_IND;
+ break;
+ case 'E':
+ if (flags == 0) /* NEL */
+ return VTE_CMD_NEL;
+ break;
+ case 'F':
+ if (flags == 0) /* Cursor to lower-left corner of screen */
+ return VTE_CMD_XTERM_CLLHP;
+ else if (flags == VTE_SEQ_FLAG_SPACE) /* S7C1T */
+ return VTE_CMD_S7C1T;
+ break;
+ case 'G':
+ if (flags == VTE_SEQ_FLAG_SPACE) { /* S8C1T */
+ return VTE_CMD_S8C1T;
+ } else if (flags == VTE_SEQ_FLAG_PERCENT) {
+ /* Select UTF-8 character set */
+ return VTE_CMD_XTERM_SUCS;
+ }
+ break;
+ case 'H':
+ if (flags == 0) /* HTS */
+ return VTE_CMD_HTS;
+ break;
+ case 'L':
+ if (flags == VTE_SEQ_FLAG_SPACE) {
+ /* Set ANSI conformance level 1 */
+ return VTE_CMD_XTERM_SACL1;
+ }
+ break;
+ case 'M':
+ if (flags == 0) { /* RI */
+ return VTE_CMD_RI;
+ } else if (flags == VTE_SEQ_FLAG_SPACE) {
+ /* Set ANSI conformance level 2 */
+ return VTE_CMD_XTERM_SACL2;
+ }
+ break;
+ case 'N':
+ if (flags == 0) { /* SS2 */
+ return VTE_CMD_SS2;
+ } else if (flags == VTE_SEQ_FLAG_SPACE) {
+ /* Set ANSI conformance level 3 */
+ return VTE_CMD_XTERM_SACL3;
+ }
+ break;
+ case 'O':
+ if (flags == 0) /* SS3 */
+ return VTE_CMD_SS3;
+ break;
+ case 'P':
+ if (flags == 0) { /* DCS */
+ /* this is already handled by the state-machine */
+ break;
+ }
+ break;
+ case 'V':
+ if (flags == 0) /* SPA */
+ return VTE_CMD_SPA;
+ break;
+ case 'W':
+ if (flags == 0) /* EPA */
+ return VTE_CMD_EPA;
+ break;
+ case 'X':
+ if (flags == 0) { /* SOS */
+ /* this is already handled by the state-machine */
+ break;
+ }
+ break;
+ case 'Z':
+ if (flags == 0) /* DECID */
+ return VTE_CMD_DECID;
+ break;
+ case '[':
+ if (flags == 0) { /* CSI */
+ /* this is already handled by the state-machine */
+ break;
+ }
+ break;
+ case '\\':
+ if (flags == 0) /* ST */
+ return VTE_CMD_ST;
+ break;
+ case ']':
+ if (flags == 0) { /* OSC */
+ /* this is already handled by the state-machine */
+ break;
+ }
+ break;
+ case '^':
+ if (flags == 0) { /* PM */
+ /* this is already handled by the state-machine */
+ break;
+ }
+ break;
+ case '_':
+ if (flags == 0) { /* APC */
+ /* this is already handled by the state-machine */
+ break;
+ }
+ break;
+ case 'c':
+ if (flags == 0) /* RIS */
+ return VTE_CMD_RIS;
+ break;
+ case 'l':
+ if (flags == 0) /* Memory lock */
+ return VTE_CMD_XTERM_MLHP;
+ break;
+ case 'm':
+ if (flags == 0) /* Memory unlock */
+ return VTE_CMD_XTERM_MUHP;
+ break;
+ case 'n':
+ if (flags == 0) /* LS2 */
+ return VTE_CMD_LS2;
+ break;
+ case 'o':
+ if (flags == 0) /* LS3 */
+ return VTE_CMD_LS3;
+ break;
+ case '|':
+ if (flags == 0) /* LS3R */
+ return VTE_CMD_LS3R;
+ break;
+ case '}':
+ if (flags == 0) /* LS2R */
+ return VTE_CMD_LS2R;
+ break;
+ case '~':
+ if (flags == 0) /* LS1R */
+ return VTE_CMD_LS1R;
+ break;
+ }
+
+ return VTE_CMD_NONE;
+}
+
+static unsigned int vte_parse_host_csi(const struct vte_seq *seq)
+{
+ unsigned int flags;
+
+ flags = seq->intermediates;
+
+ switch (seq->terminator) {
+ case 'A':
+ if (flags == 0) /* CUU */
+ return VTE_CMD_CUU;
+ break;
+ case 'a':
+ if (flags == 0) /* HPR */
+ return VTE_CMD_HPR;
+ break;
+ case 'B':
+ if (flags == 0) /* CUD */
+ return VTE_CMD_CUD;
+ break;
+ case 'b':
+ if (flags == 0) /* REP */
+ return VTE_CMD_REP;
+ break;
+ case 'C':
+ if (flags == 0) /* CUF */
+ return VTE_CMD_CUF;
+ break;
+ case 'c':
+ if (flags == 0) /* DA1 */
+ return VTE_CMD_DA1;
+ else if (flags == VTE_SEQ_FLAG_GT) /* DA2 */
+ return VTE_CMD_DA2;
+ else if (flags == VTE_SEQ_FLAG_EQUAL) /* DA3 */
+ return VTE_CMD_DA3;
+ break;
+ case 'D':
+ if (flags == 0) /* CUB */
+ return VTE_CMD_CUB;
+ break;
+ case 'd':
+ if (flags == 0) /* VPA */
+ return VTE_CMD_VPA;
+ break;
+ case 'E':
+ if (flags == 0) /* CNL */
+ return VTE_CMD_CNL;
+ break;
+ case 'e':
+ if (flags == 0) /* VPR */
+ return VTE_CMD_VPR;
+ break;
+ case 'F':
+ if (flags == 0) /* CPL */
+ return VTE_CMD_CPL;
+ break;
+ case 'f':
+ if (flags == 0) /* HVP */
+ return VTE_CMD_HVP;
+ break;
+ case 'G':
+ if (flags == 0) /* CHA */
+ return VTE_CMD_CHA;
+ break;
+ case 'g':
+ if (flags == 0) /* TBC */
+ return VTE_CMD_TBC;
+ else if (flags == VTE_SEQ_FLAG_MULT) /* DECLFKC */
+ return VTE_CMD_DECLFKC;
+ break;
+ case 'H':
+ if (flags == 0) /* CUP */
+ return VTE_CMD_CUP;
+ break;
+ case 'h':
+ if (flags == 0) /* SM ANSI */
+ return VTE_CMD_SM_ANSI;
+ else if (flags == VTE_SEQ_FLAG_WHAT) /* SM DEC */
+ return VTE_CMD_SM_DEC;
+ break;
+ case 'I':
+ if (flags == 0) /* CHT */
+ return VTE_CMD_CHT;
+ break;
+ case 'i':
+ if (flags == 0) /* MC ANSI */
+ return VTE_CMD_MC_ANSI;
+ else if (flags == VTE_SEQ_FLAG_WHAT) /* MC DEC */
+ return VTE_CMD_MC_DEC;
+ break;
+ case 'J':
+ if (flags == 0) /* ED */
+ return VTE_CMD_ED;
+ else if (flags == VTE_SEQ_FLAG_WHAT) /* DECSED */
+ return VTE_CMD_DECSED;
+ break;
+ case 'K':
+ if (flags == 0) /* EL */
+ return VTE_CMD_EL;
+ else if (flags == VTE_SEQ_FLAG_WHAT) /* DECSEL */
+ return VTE_CMD_DECSEL;
+ break;
+ case 'L':
+ if (flags == 0) /* IL */
+ return VTE_CMD_IL;
+ break;
+ case 'l':
+ if (flags == 0) /* RM ANSI */
+ return VTE_CMD_RM_ANSI;
+ else if (flags == VTE_SEQ_FLAG_WHAT) /* RM DEC */
+ return VTE_CMD_RM_DEC;
+ break;
+ case 'M':
+ if (flags == 0) /* DL */
+ return VTE_CMD_DL;
+ break;
+ case 'm':
+ if (flags == 0) /* SGR */
+ return VTE_CMD_SGR;
+ else if (flags == VTE_SEQ_FLAG_GT) /* XTERM SMR */
+ return VTE_CMD_XTERM_SRV;
+ break;
+ case 'n':
+ if (flags == 0) /* DSR ANSI */
+ return VTE_CMD_DSR_ANSI;
+ else if (flags == VTE_SEQ_FLAG_GT) /* XTERM RMR */
+ return VTE_CMD_XTERM_RRV;
+ else if (flags == VTE_SEQ_FLAG_WHAT) /* DSR DEC */
+ return VTE_CMD_DSR_DEC;
+ break;
+ case 'P':
+ if (flags == 0) /* DCH */
+ return VTE_CMD_DCH;
+ else if (flags == VTE_SEQ_FLAG_SPACE) /* PPA */
+ return VTE_CMD_PPA;
+ break;
+ case 'p':
+ if (flags == 0) /* DECSSL */
+ return VTE_CMD_DECSSL;
+ else if (flags == VTE_SEQ_FLAG_SPACE) /* DECSSCLS */
+ return VTE_CMD_DECSSCLS;
+ else if (flags == VTE_SEQ_FLAG_BANG) /* DECSTR */
+ return VTE_CMD_DECSTR;
+ else if (flags == VTE_SEQ_FLAG_DQUOTE) /* DECSCL */
+ return VTE_CMD_DECSCL;
+ else if (flags == VTE_SEQ_FLAG_CASH) /* DECRQM-ANSI */
+ return VTE_CMD_DECRQM_ANSI;
+ else if (flags == (VTE_SEQ_FLAG_CASH |
+ VTE_SEQ_FLAG_WHAT)) /* DECRQM-DEC */
+ return VTE_CMD_DECRQM_DEC;
+ else if (flags == VTE_SEQ_FLAG_PCLOSE) /* DECSDPT */
+ return VTE_CMD_DECSDPT;
+ else if (flags == VTE_SEQ_FLAG_MULT) /* DECSPPCS */
+ return VTE_CMD_DECSPPCS;
+ else if (flags == VTE_SEQ_FLAG_PLUS) /* DECSR */
+ return VTE_CMD_DECSR;
+ else if (flags == VTE_SEQ_FLAG_COMMA) /* DECLTOD */
+ return VTE_CMD_DECLTOD;
+ else if (flags == VTE_SEQ_FLAG_GT) /* XTERM SPM */
+ return VTE_CMD_XTERM_SPM;
+ break;
+ case 'Q':
+ if (flags == VTE_SEQ_FLAG_SPACE) /* PPR */
+ return VTE_CMD_PPR;
+ break;
+ case 'q':
+ if (flags == 0) /* DECLL */
+ return VTE_CMD_DECLL;
+ else if (flags == VTE_SEQ_FLAG_SPACE) /* DECSCUSR */
+ return VTE_CMD_DECSCUSR;
+ else if (flags == VTE_SEQ_FLAG_DQUOTE) /* DECSCA */
+ return VTE_CMD_DECSCA;
+ else if (flags == VTE_SEQ_FLAG_CASH) /* DECSDDT */
+ return VTE_CMD_DECSDDT;
+ else if (flags == VTE_SEQ_FLAG_MULT) /* DECSRC */
+ return VTE_CMD_DECSR;
+ else if (flags == VTE_SEQ_FLAG_PLUS) /* DECELF */
+ return VTE_CMD_DECELF;
+ else if (flags == VTE_SEQ_FLAG_COMMA) /* DECTID */
+ return VTE_CMD_DECTID;
+ break;
+ case 'R':
+ if (flags == VTE_SEQ_FLAG_SPACE) /* PPB */
+ return VTE_CMD_PPB;
+ break;
+ case 'r':
+ if (flags == 0) {
+ /* DECSTBM */
+ return VTE_CMD_DECSTBM;
+ } else if (flags == VTE_SEQ_FLAG_SPACE) {
+ /* DECSKCV */
+ return VTE_CMD_DECSKCV;
+ } else if (flags == VTE_SEQ_FLAG_CASH) {
+ /* DECCARA */
+ return VTE_CMD_DECCARA;
+ } else if (flags == VTE_SEQ_FLAG_MULT) {
+ /* DECSCS */
+ return VTE_CMD_DECSCS;
+ } else if (flags == VTE_SEQ_FLAG_PLUS) {
+ /* DECSMKR */
+ return VTE_CMD_DECSMKR;
+ } else if (flags == VTE_SEQ_FLAG_WHAT) {
+ /*
+ * There's a conflict between DECPCTERM and XTERM-RPM.
+ * XTERM-RPM takes a single argument, DECPCTERM takes 2.
+ * Split both up and forward the call to the closer
+ * match.
+ */
+ if (seq->n_args <= 1) /* XTERM RPM */
+ return VTE_CMD_XTERM_RPM;
+ else if (seq->n_args >= 2) /* DECPCTERM */
+ return VTE_CMD_DECPCTERM;
+ }
+ break;
+ case 'S':
+ if (flags == 0) /* SU */
+ return VTE_CMD_SU;
+ else if (flags == VTE_SEQ_FLAG_WHAT) /* XTERM SGFX */
+ return VTE_CMD_XTERM_SGFX;
+ break;
+ case 's':
+ if (flags == 0) {
+ /*
+ * There's a conflict between DECSLRM and SC-ANSI which
+ * cannot be resolved without knowing the state of
+ * DECLRMM. We leave that decision up to the caller.
+ */
+ return VTE_CMD_DECSLRM_OR_SC;
+ } else if (flags == VTE_SEQ_FLAG_CASH) {
+ /* DECSPRTT */
+ return VTE_CMD_DECSPRTT;
+ } else if (flags == VTE_SEQ_FLAG_MULT) {
+ /* DECSFC */
+ return VTE_CMD_DECSFC;
+ } else if (flags == VTE_SEQ_FLAG_WHAT) {
+ /* XTERM SPM */
+ return VTE_CMD_XTERM_SPM;
+ }
+ break;
+ case 'T':
+ if (flags == 0) {
+ /*
+ * There's a conflict between SD and XTERM IHMT that we
+ * have to resolve by checking the parameter count.
+ * XTERM_IHMT needs exactly 5 arguments, SD takes 0 or
+ * 1. We're conservative here and give both a wider
+ * range to allow unused arguments (compat...).
+ */
+ if (seq->n_args < 5) {
+ /* SD */
+ return VTE_CMD_SD;
+ } else if (seq->n_args >= 5) {
+ /* XTERM IHMT */
+ return VTE_CMD_XTERM_IHMT;
+ }
+ } else if (flags == VTE_SEQ_FLAG_GT) {
+ /* XTERM RTM */
+ return VTE_CMD_XTERM_RTM;
+ }
+ break;
+ case 't':
+ if (flags == 0) {
+ /*
+ * There's a conflict between XTERM_WM and DECSLPP. We
+ * cannot resolve it as some combinations are valid for
+ * both. We go with XTERM_WM for now.
+ *
+ * TODO: Figure out how to resolve that conflict and
+ * return VTE_CMD_DECSLPP if possible.
+ */
+ return VTE_CMD_XTERM_WM; /* XTERM WM */
+ } else if (flags == VTE_SEQ_FLAG_SPACE) {
+ /* DECSWBV */
+ return VTE_CMD_DECSWBV;
+ } else if (flags == VTE_SEQ_FLAG_DQUOTE) {
+ /* DECSRFR */
+ return VTE_CMD_DECSRFR;
+ } else if (flags == VTE_SEQ_FLAG_CASH) {
+ /* DECRARA */
+ return VTE_CMD_DECRARA;
+ } else if (flags == VTE_SEQ_FLAG_GT) {
+ /* XTERM STM */
+ return VTE_CMD_XTERM_STM;
+ }
+ break;
+ case 'U':
+ if (flags == 0) /* NP */
+ return VTE_CMD_NP;
+ break;
+ case 'u':
+ if (flags == 0) {
+ /* RC */
+ return VTE_CMD_RC;
+ } else if (flags == VTE_SEQ_FLAG_SPACE) {
+ /* DECSMBV */
+ return VTE_CMD_DECSMBV;
+ } else if (flags == VTE_SEQ_FLAG_DQUOTE) {
+ /* DECSTRL */
+ return VTE_CMD_DECSTRL;
+ } else if (flags == VTE_SEQ_FLAG_WHAT) {
+ /* DECRQUPSS */
+ return VTE_CMD_DECRQUPSS;
+ } else if (seq->args[0] == 1 && flags == VTE_SEQ_FLAG_CASH) {
+ /* DECRQTSR */
+ return VTE_CMD_DECRQTSR;
+ } else if (flags == VTE_SEQ_FLAG_MULT) {
+ /* DECSCP */
+ return VTE_CMD_DECSCP;
+ } else if (flags == VTE_SEQ_FLAG_COMMA) {
+ /* DECRQKT */
+ return VTE_CMD_DECRQKT;
+ }
+ break;
+ case 'V':
+ if (flags == 0) /* PP */
+ return VTE_CMD_PP;
+ break;
+ case 'v':
+ if (flags == VTE_SEQ_FLAG_SPACE) /* DECSLCK */
+ return VTE_CMD_DECSLCK;
+ else if (flags == VTE_SEQ_FLAG_DQUOTE) /* DECRQDE */
+ return VTE_CMD_DECRQDE;
+ else if (flags == VTE_SEQ_FLAG_CASH) /* DECCRA */
+ return VTE_CMD_DECCRA;
+ else if (flags == VTE_SEQ_FLAG_COMMA) /* DECRPKT */
+ return VTE_CMD_DECRPKT;
+ break;
+ case 'W':
+ if (seq->args[0] == 5 && flags == VTE_SEQ_FLAG_WHAT) {
+ /* DECST8C */
+ return VTE_CMD_DECST8C;
+ }
+ break;
+ case 'w':
+ if (flags == VTE_SEQ_FLAG_CASH) /* DECRQPSR */
+ return VTE_CMD_DECRQPSR;
+ else if (flags == VTE_SEQ_FLAG_SQUOTE) /* DECEFR */
+ return VTE_CMD_DECEFR;
+ else if (flags == VTE_SEQ_FLAG_PLUS) /* DECSPP */
+ return VTE_CMD_DECSPP;
+ break;
+ case 'X':
+ if (flags == 0) /* ECH */
+ return VTE_CMD_ECH;
+ break;
+ case 'x':
+ if (flags == 0) /* DECREQTPARM */
+ return VTE_CMD_DECREQTPARM;
+ else if (flags == VTE_SEQ_FLAG_CASH) /* DECFRA */
+ return VTE_CMD_DECFRA;
+ else if (flags == VTE_SEQ_FLAG_MULT) /* DECSACE */
+ return VTE_CMD_DECSACE;
+ else if (flags == VTE_SEQ_FLAG_PLUS) /* DECRQPKFM */
+ return VTE_CMD_DECRQPKFM;
+ break;
+ case 'y':
+ if (flags == 0) /* DECTST */
+ return VTE_CMD_DECTST;
+ else if (flags == VTE_SEQ_FLAG_MULT) /* DECRQCRA */
+ return VTE_CMD_DECRQCRA;
+ else if (flags == VTE_SEQ_FLAG_PLUS) /* DECPKFMR */
+ return VTE_CMD_DECPKFMR;
+ break;
+ case 'Z':
+ if (flags == 0) /* CBT */
+ return VTE_CMD_CBT;
+ break;
+ case 'z':
+ if (flags == VTE_SEQ_FLAG_CASH) /* DECERA */
+ return VTE_CMD_DECERA;
+ else if (flags == VTE_SEQ_FLAG_SQUOTE) /* DECELR */
+ return VTE_CMD_DECELR;
+ else if (flags == VTE_SEQ_FLAG_MULT) /* DECINVM */
+ return VTE_CMD_DECINVM;
+ else if (flags == VTE_SEQ_FLAG_PLUS) /* DECPKA */
+ return VTE_CMD_DECPKA;
+ break;
+ case '@':
+ if (flags == 0) /* ICH */
+ return VTE_CMD_ICH;
+ break;
+ case '`':
+ if (flags == 0) /* HPA */
+ return VTE_CMD_HPA;
+ break;
+ case '{':
+ if (flags == VTE_SEQ_FLAG_CASH) /* DECSERA */
+ return VTE_CMD_DECSERA;
+ else if (flags == VTE_SEQ_FLAG_SQUOTE) /* DECSLE */
+ return VTE_CMD_DECSLE;
+ break;
+ case '|':
+ if (flags == VTE_SEQ_FLAG_CASH) /* DECSCPP */
+ return VTE_CMD_DECSCPP;
+ else if (flags == VTE_SEQ_FLAG_SQUOTE) /* DECRQLP */
+ return VTE_CMD_DECRQLP;
+ else if (flags == VTE_SEQ_FLAG_MULT) /* DECSNLS */
+ return VTE_CMD_DECSNLS;
+ break;
+ case '}':
+ if (flags == VTE_SEQ_FLAG_SPACE) /* DECKBD */
+ return VTE_CMD_DECKBD;
+ else if (flags == VTE_SEQ_FLAG_CASH) /* DECSASD */
+ return VTE_CMD_DECSASD;
+ else if (flags == VTE_SEQ_FLAG_SQUOTE) /* DECIC */
+ return VTE_CMD_DECIC;
+ break;
+ case '~':
+ if (flags == VTE_SEQ_FLAG_SPACE) /* DECTME */
+ return VTE_CMD_DECTME;
+ else if (flags == VTE_SEQ_FLAG_CASH) /* DECSSDT */
+ return VTE_CMD_DECSSDT;
+ else if (flags == VTE_SEQ_FLAG_SQUOTE) /* DECDC */
+ return VTE_CMD_DECDC;
+ break;
+ }
+
+ return VTE_CMD_NONE;
+}
+
+/*
+ * State Machine
+ * This parser controls the parser-state and returns any detected sequence to
+ * the caller. The parser is based on this state-diagram from Paul Williams:
+ * http://vt100.net/emu/
+ * It was written from scratch and extended where needed.
+ * This parser is fully compatible up to the vt500 series. We expect UCS-4 as
+ * input. It's the callers responsibility to do any UTF-8 parsing.
+ */
+
+enum parser_state {
+ STATE_NONE, /* placeholder */
+ STATE_GROUND, /* initial state and ground */
+ STATE_ESC, /* ESC sequence was started */
+ STATE_ESC_INT, /* intermediate escape characters */
+ STATE_CSI_ENTRY, /* starting CSI sequence */
+ STATE_CSI_PARAM, /* CSI parameters */
+ STATE_CSI_INT, /* intermediate CSI characters */
+ STATE_CSI_IGNORE, /* CSI error; ignore this CSI sequence */
+ STATE_DCS_ENTRY, /* starting DCS sequence */
+ STATE_DCS_PARAM, /* DCS parameters */
+ STATE_DCS_INT, /* intermediate DCS characters */
+ STATE_DCS_PASS, /* DCS data passthrough */
+ STATE_DCS_IGNORE, /* DCS error; ignore this DCS sequence */
+ STATE_OSC_STRING, /* parsing OSC sequence */
+ STATE_ST_IGNORE, /* unimplemented seq; ignore until ST */
+ STATE_N,
+};
+
+enum parser_action {
+ ACTION_NONE, /* placeholder */
+ ACTION_CLEAR, /* clear parameters */
+ ACTION_IGNORE, /* ignore the character entirely */
+ ACTION_PRINT, /* print the character on the console */
+ ACTION_EXECUTE, /* execute single control character (C0/C1) */
+ ACTION_COLLECT, /* collect intermediate character */
+ ACTION_PARAM, /* collect parameter character */
+ ACTION_ESC_DISPATCH, /* dispatch escape sequence */
+ ACTION_CSI_DISPATCH, /* dispatch csi sequence */
+ ACTION_DCS_START, /* start of DCS data */
+ ACTION_DCS_COLLECT, /* collect DCS data */
+ ACTION_DCS_CONSUME, /* consume DCS terminator */
+ ACTION_DCS_DISPATCH, /* dispatch dcs sequence */
+ ACTION_OSC_START, /* start of OSC data */
+ ACTION_OSC_COLLECT, /* collect OSC data */
+ ACTION_OSC_CONSUME, /* consume OSC terminator */
+ ACTION_OSC_DISPATCH, /* dispatch osc sequence */
+ ACTION_N,
+};
+
+/**
+ * vte_parser_new() - Allocate parser object
+ * @out: output variable for new parser object
+ *
+ * Return: 0 on success, negative error code on failure.
+ */
+int vte_parser_new(struct vte_parser **out)
+{
+ struct vte_parser *parser;
+
+ parser = (struct vte_parser*)kzalloc(sizeof(*parser), GFP_KERNEL);
+ if (!parser)
+ return -ENOMEM;
+
+ parser->st_alloc = 64;
+ parser->seq.st = (char*)kzalloc(parser->st_alloc + 1, GFP_KERNEL);
+ if (!parser->seq.st) {
+ kfree(parser);
+ return -ENOMEM;
+ }
+
+ *out = parser;
+ return 0;
+}
+
+/**
+ * vte_parser_free() - Free parser object
+ * @parser: parser object to free, or NULL
+ *
+ * Return: NULL is returned.
+ */
+struct vte_parser *vte_parser_free(struct vte_parser *parser)
+{
+ if (!parser)
+ return NULL;
+
+ kfree(parser->seq.st);
+ kfree(parser);
+ return NULL;
+}
+
+static inline void parser_clear(struct vte_parser *parser)
+{
+ unsigned int i;
+
+ parser->seq.command = VTE_CMD_NONE;
+ parser->seq.terminator = 0;
+ parser->seq.intermediates = 0;
+ parser->seq.charset = VTE_CHARSET_NONE;
+ parser->seq.n_args = 0;
+ for (i = 0; i < VTE_PARSER_ARG_MAX; ++i)
+ parser->seq.args[i] = -1;
+
+ parser->seq.n_st = 0;
+ parser->seq.st[0] = 0;
+}
+
+static int parser_ignore(struct vte_parser *parser, u32 raw)
+{
+ parser_clear(parser);
+ parser->seq.type = VTE_SEQ_IGNORE;
+ parser->seq.command = VTE_CMD_NONE;
+ parser->seq.terminator = raw;
+ parser->seq.charset = VTE_CHARSET_NONE;
+
+ return parser->seq.type;
+}
+
+static int parser_print(struct vte_parser *parser, u32 raw)
+{
+ parser_clear(parser);
+ parser->seq.type = VTE_SEQ_GRAPHIC;
+ parser->seq.command = VTE_CMD_GRAPHIC;
+ parser->seq.terminator = raw;
+ parser->seq.charset = VTE_CHARSET_NONE;
+
+ return parser->seq.type;
+}
+
+static int parser_execute(struct vte_parser *parser, u32 raw)
+{
+ parser_clear(parser);
+ parser->seq.type = VTE_SEQ_CONTROL;
+ parser->seq.command = VTE_CMD_GRAPHIC;
+ parser->seq.terminator = raw;
+ parser->seq.charset = VTE_CHARSET_NONE;
+ parser->seq.command = vte_parse_host_control(&parser->seq);
+
+ return parser->seq.type;
+}
+
+static void parser_collect(struct vte_parser *parser, u32 raw)
+{
+ /*
+ * Usually, characters from 0x30 to 0x3f are only allowed as leading
+ * markers (or as part of the parameters), characters from 0x20 to 0x2f
+ * are only allowed as trailing markers. However, our state-machine
+ * already verifies those restrictions so we can handle them the same
+ * way here. Note that we safely allow markers to be specified multiple
+ * times.
+ */
+
+ if (raw >= 0x20 && raw <= 0x3f)
+ parser->seq.intermediates |= 1 << (raw - 0x20);
+}
+
+static void parser_param(struct vte_parser *parser, u32 raw)
+{
+ if (raw == ';') {
+ if (parser->seq.n_args < VTE_PARSER_ARG_MAX)
+ ++parser->seq.n_args;
+
+ return;
+ }
+
+ if (parser->seq.n_args >= VTE_PARSER_ARG_MAX)
+ return;
+
+ if (raw >= '0' && raw <= '9') {
+ auto value = parser->seq.args[parser->seq.n_args];
+ if (value < 0)
+ value = 0;
+ value = value * 10 + raw - '0';
+
+ /*
+ * VT510 tells us to clamp all values to [0, 9999], however, it
+ * also allows commands with values up to 2^15-1. We simply use
+ * 2^16 as maximum here to be compatible to all commands, but
+ * avoid overflows in any calculations.
+ */
+ if (value > 0xffff)
+ value = 0xffff;
+
+ parser->seq.args[parser->seq.n_args] = value;
+ }
+}
+
+static int parser_esc(struct vte_parser *parser, u32 raw)
+{
+ parser->seq.type = VTE_SEQ_ESCAPE;
+ parser->seq.command = VTE_CMD_NONE;
+ parser->seq.terminator = raw;
+ parser->seq.charset = VTE_CHARSET_NONE;
+ parser->seq.command = vte_parse_host_escape(&parser->seq,
+ &parser->seq.charset);
+
+ return parser->seq.type;
+}
+
+static int parser_csi(struct vte_parser *parser, u32 raw)
+{
+ /* parser->seq is cleared during CSI-ENTER state, thus there's no need
+ * to clear invalid fields here. */
+
+ if (parser->seq.n_args < VTE_PARSER_ARG_MAX) {
+ if (parser->seq.n_args > 0 ||
+ parser->seq.args[parser->seq.n_args] >= 0)
+ ++parser->seq.n_args;
+ }
+
+ parser->seq.type = VTE_SEQ_CSI;
+ parser->seq.command = VTE_CMD_NONE;
+ parser->seq.terminator = raw;
+ parser->seq.charset = VTE_CHARSET_NONE;
+ parser->seq.command = vte_parse_host_csi(&parser->seq);
+
+ return parser->seq.type;
+}
+
+/* perform state transition and dispatch related actions */
+static int parser_transition(struct vte_parser *parser,
+ u32 raw,
+ unsigned int state,
+ unsigned int action)
+{
+ if (state != STATE_NONE)
+ parser->state = state;
+
+ switch (action) {
+ case ACTION_NONE:
+ return VTE_SEQ_NONE;
+ case ACTION_CLEAR:
+ parser_clear(parser);
+ return VTE_SEQ_NONE;
+ case ACTION_IGNORE:
+ return parser_ignore(parser, raw);
+ case ACTION_PRINT:
+ return parser_print(parser, raw);
+ case ACTION_EXECUTE:
+ return parser_execute(parser, raw);
+ case ACTION_COLLECT:
+ parser_collect(parser, raw);
+ return VTE_SEQ_NONE;
+ case ACTION_PARAM:
+ parser_param(parser, raw);
+ return VTE_SEQ_NONE;
+ case ACTION_ESC_DISPATCH:
+ return parser_esc(parser, raw);
+ case ACTION_CSI_DISPATCH:
+ return parser_csi(parser, raw);
+ case ACTION_DCS_START:
+ /* not implemented */
+ return VTE_SEQ_NONE;
+ case ACTION_DCS_COLLECT:
+ /* not implemented */
+ return VTE_SEQ_NONE;
+ case ACTION_DCS_CONSUME:
+ /* not implemented */
+ return VTE_SEQ_NONE;
+ case ACTION_DCS_DISPATCH:
+ /* not implemented */
+ return VTE_SEQ_NONE;
+ case ACTION_OSC_START:
+ /* not implemented */
+ return VTE_SEQ_NONE;
+ case ACTION_OSC_COLLECT:
+ /* not implemented */
+ return VTE_SEQ_NONE;
+ case ACTION_OSC_CONSUME:
+ /* not implemented */
+ return VTE_SEQ_NONE;
+ case ACTION_OSC_DISPATCH:
+ /* not implemented */
+ return VTE_SEQ_NONE;
+ default:
+ WARN(1, "invalid vte-parser action");
+ return VTE_SEQ_NONE;
+ }
+}
+
+static int parser_feed_to_state(struct vte_parser *parser, u32 raw)
+{
+ switch (parser->state) {
+ case STATE_NONE:
+ /*
+ * During initialization, parser->state is cleared. Treat this
+ * as STATE_GROUND. We will then never get to STATE_NONE again.
+ */
+ case STATE_GROUND:
+ switch (raw) {
+ case 0x00 ... 0x1f: /* C0 */
+ case 0x80 ... 0x9b: /* C1 \ { ST } */
+ case 0x9d ... 0x9f:
+ return parser_transition(parser, raw, STATE_NONE,
+ ACTION_EXECUTE);
+ case 0x9c: /* ST */
+ return parser_transition(parser, raw, STATE_NONE,
+ ACTION_IGNORE);
+ }
+
+ return parser_transition(parser, raw,
+ STATE_NONE, ACTION_PRINT);
+ case STATE_ESC:
+ switch (raw) {
+ case 0x00 ... 0x1f: /* C0 */
+ return parser_transition(parser, raw, STATE_NONE,
+ ACTION_EXECUTE);
+ case 0x20 ... 0x2f: /* [' ' - '\'] */
+ return parser_transition(parser, raw, STATE_ESC_INT,
+ ACTION_COLLECT);
+ case 0x30 ... 0x4f: /* ['0' - '~'] \ */
+ case 0x51 ... 0x57: /* { 'P', 'X', '[', ']', '^', '_' } */
+ case 0x59 ... 0x5a:
+ case 0x5c:
+ case 0x60 ... 0x7e:
+ return parser_transition(parser, raw, STATE_GROUND,
+ ACTION_ESC_DISPATCH);
+ case 0x50: /* 'P' */
+ return parser_transition(parser, raw, STATE_DCS_ENTRY,
+ ACTION_CLEAR);
+ case 0x5b: /* '[' */
+ return parser_transition(parser, raw, STATE_CSI_ENTRY,
+ ACTION_CLEAR);
+ case 0x5d: /* ']' */
+ return parser_transition(parser, raw, STATE_OSC_STRING,
+ ACTION_CLEAR);
+ case 0x58: /* 'X' */
+ case 0x5e: /* '^' */
+ case 0x5f: /* '_' */
+ return parser_transition(parser, raw, STATE_ST_IGNORE,
+ ACTION_NONE);
+ case 0x7f: /* DEL */
+ return parser_transition(parser, raw, STATE_NONE,
+ ACTION_IGNORE);
+ case 0x9c: /* ST */
+ return parser_transition(parser, raw, STATE_GROUND,
+ ACTION_IGNORE);
+ }
+
+ return parser_transition(parser, raw,
+ STATE_ESC_INT, ACTION_COLLECT);
+ case STATE_ESC_INT:
+ switch (raw) {
+ case 0x00 ... 0x1f: /* C0 */
+ return parser_transition(parser, raw, STATE_NONE,
+ ACTION_EXECUTE);
+ case 0x20 ... 0x2f: /* [' ' - '\'] */
+ return parser_transition(parser, raw, STATE_NONE,
+ ACTION_COLLECT);
+ case 0x30 ... 0x7e: /* ['0' - '~'] */
+ return parser_transition(parser, raw, STATE_GROUND,
+ ACTION_ESC_DISPATCH);
+ case 0x7f: /* DEL */
+ return parser_transition(parser, raw, STATE_NONE,
+ ACTION_IGNORE);
+ case 0x9c: /* ST */
+ return parser_transition(parser, raw, STATE_GROUND,
+ ACTION_IGNORE);
+ }
+
+ return parser_transition(parser, raw,
+ STATE_NONE, ACTION_COLLECT);
+ case STATE_CSI_ENTRY:
+ switch (raw) {
+ case 0x00 ... 0x1f: /* C0 */
+ return parser_transition(parser, raw, STATE_NONE,
+ ACTION_EXECUTE);
+ case 0x20 ... 0x2f: /* [' ' - '\'] */
+ return parser_transition(parser, raw, STATE_CSI_INT,
+ ACTION_COLLECT);
+ case 0x3a: /* ':' */
+ return parser_transition(parser, raw, STATE_CSI_IGNORE,
+ ACTION_NONE);
+ case 0x30 ... 0x39: /* ['0' - '9'] */
+ case 0x3b: /* ';' */
+ return parser_transition(parser, raw, STATE_CSI_PARAM,
+ ACTION_PARAM);
+ case 0x3c ... 0x3f: /* ['<' - '?'] */
+ return parser_transition(parser, raw, STATE_CSI_PARAM,
+ ACTION_COLLECT);
+ case 0x40 ... 0x7e: /* ['@' - '~'] */
+ return parser_transition(parser, raw, STATE_GROUND,
+ ACTION_CSI_DISPATCH);
+ case 0x7f: /* DEL */
+ return parser_transition(parser, raw, STATE_NONE,
+ ACTION_IGNORE);
+ case 0x9c: /* ST */
+ return parser_transition(parser, raw, STATE_GROUND,
+ ACTION_IGNORE);
+ }
+
+ return parser_transition(parser, raw,
+ STATE_CSI_IGNORE, ACTION_NONE);
+ case STATE_CSI_PARAM:
+ switch (raw) {
+ case 0x00 ... 0x1f: /* C0 */
+ return parser_transition(parser, raw, STATE_NONE,
+ ACTION_EXECUTE);
+ case 0x20 ... 0x2f: /* [' ' - '\'] */
+ return parser_transition(parser, raw, STATE_CSI_INT,
+ ACTION_COLLECT);
+ case 0x30 ... 0x39: /* ['0' - '9'] */
+ case 0x3b: /* ';' */
+ return parser_transition(parser, raw, STATE_NONE,
+ ACTION_PARAM);
+ case 0x3a: /* ':' */
+ case 0x3c ... 0x3f: /* ['<' - '?'] */
+ return parser_transition(parser, raw, STATE_CSI_IGNORE,
+ ACTION_NONE);
+ case 0x40 ... 0x7e: /* ['@' - '~'] */
+ return parser_transition(parser, raw, STATE_GROUND,
+ ACTION_CSI_DISPATCH);
+ case 0x7f: /* DEL */
+ return parser_transition(parser, raw, STATE_NONE,
+ ACTION_IGNORE);
+ case 0x9c: /* ST */
+ return parser_transition(parser, raw, STATE_GROUND,
+ ACTION_IGNORE);
+ }
+
+ return parser_transition(parser, raw,
+ STATE_CSI_IGNORE, ACTION_NONE);
+ case STATE_CSI_INT:
+ switch (raw) {
+ case 0x00 ... 0x1f: /* C0 */
+ return parser_transition(parser, raw, STATE_NONE,
+ ACTION_EXECUTE);
+ case 0x20 ... 0x2f: /* [' ' - '\'] */
+ return parser_transition(parser, raw, STATE_NONE,
+ ACTION_COLLECT);
+ case 0x30 ... 0x3f: /* ['0' - '?'] */
+ return parser_transition(parser, raw, STATE_CSI_IGNORE,
+ ACTION_NONE);
+ case 0x40 ... 0x7e: /* ['@' - '~'] */
+ return parser_transition(parser, raw, STATE_GROUND,
+ ACTION_CSI_DISPATCH);
+ case 0x7f: /* DEL */
+ return parser_transition(parser, raw, STATE_NONE,
+ ACTION_IGNORE);
+ case 0x9c: /* ST */
+ return parser_transition(parser, raw, STATE_GROUND,
+ ACTION_IGNORE);
+ }
+
+ return parser_transition(parser, raw,
+ STATE_CSI_IGNORE, ACTION_NONE);
+ case STATE_CSI_IGNORE:
+ switch (raw) {
+ case 0x00 ... 0x1f: /* C0 */
+ return parser_transition(parser, raw, STATE_NONE,
+ ACTION_EXECUTE);
+ case 0x20 ... 0x3f: /* [' ' - '?'] */
+ return parser_transition(parser, raw, STATE_NONE,
+ ACTION_NONE);
+ case 0x40 ... 0x7e: /* ['@' - '~'] */
+ return parser_transition(parser, raw, STATE_GROUND,
+ ACTION_NONE);
+ case 0x7f: /* DEL */
+ return parser_transition(parser, raw, STATE_NONE,
+ ACTION_IGNORE);
+ case 0x9c: /* ST */
+ return parser_transition(parser, raw, STATE_GROUND,
+ ACTION_IGNORE);
+ }
+
+ return parser_transition(parser, raw,
+ STATE_NONE, ACTION_NONE);
+ case STATE_DCS_ENTRY:
+ switch (raw) {
+ case 0x00 ... 0x1f: /* C0 */
+ return parser_transition(parser, raw, STATE_NONE,
+ ACTION_IGNORE);
+ case 0x20 ... 0x2f: /* [' ' - '\'] */
+ return parser_transition(parser, raw, STATE_DCS_INT,
+ ACTION_COLLECT);
+ case 0x3a: /* ':' */
+ return parser_transition(parser, raw, STATE_DCS_IGNORE,
+ ACTION_NONE);
+ case 0x30 ... 0x39: /* ['0' - '9'] */
+ case 0x3b: /* ';' */
+ return parser_transition(parser, raw, STATE_DCS_PARAM,
+ ACTION_PARAM);
+ case 0x3c ... 0x3f: /* ['<' - '?'] */
+ return parser_transition(parser, raw, STATE_DCS_PARAM,
+ ACTION_COLLECT);
+ case 0x40 ... 0x7e: /* ['@' - '~'] */
+ return parser_transition(parser, raw, STATE_DCS_PASS,
+ ACTION_DCS_CONSUME);
+ case 0x7f: /* DEL */
+ return parser_transition(parser, raw, STATE_NONE,
+ ACTION_IGNORE);
+ case 0x9c: /* ST */
+ return parser_transition(parser, raw, STATE_GROUND,
+ ACTION_IGNORE);
+ }
+
+ return parser_transition(parser, raw,
+ STATE_DCS_PASS, ACTION_DCS_CONSUME);
+ case STATE_DCS_PARAM:
+ switch (raw) {
+ case 0x00 ... 0x1f: /* C0 */
+ return parser_transition(parser, raw, STATE_NONE,
+ ACTION_IGNORE);
+ case 0x20 ... 0x2f: /* [' ' - '\'] */
+ return parser_transition(parser, raw, STATE_DCS_INT,
+ ACTION_COLLECT);
+ case 0x30 ... 0x39: /* ['0' - '9'] */
+ case 0x3b: /* ';' */
+ return parser_transition(parser, raw, STATE_NONE,
+ ACTION_PARAM);
+ case 0x3a: /* ':' */
+ case 0x3c ... 0x3f: /* ['<' - '?'] */
+ return parser_transition(parser, raw, STATE_DCS_IGNORE,
+ ACTION_NONE);
+ case 0x40 ... 0x7e: /* ['@' - '~'] */
+ return parser_transition(parser, raw, STATE_DCS_PASS,
+ ACTION_DCS_CONSUME);
+ case 0x7f: /* DEL */
+ return parser_transition(parser, raw, STATE_NONE,
+ ACTION_IGNORE);
+ case 0x9c: /* ST */
+ return parser_transition(parser, raw, STATE_GROUND,
+ ACTION_IGNORE);
+ }
+
+ return parser_transition(parser, raw,
+ STATE_DCS_PASS, ACTION_DCS_CONSUME);
+ case STATE_DCS_INT:
+ switch (raw) {
+ case 0x00 ... 0x1f: /* C0 */
+ return parser_transition(parser, raw, STATE_NONE,
+ ACTION_IGNORE);
+ case 0x20 ... 0x2f: /* [' ' - '\'] */
+ return parser_transition(parser, raw, STATE_NONE,
+ ACTION_COLLECT);
+ case 0x30 ... 0x3f: /* ['0' - '?'] */
+ return parser_transition(parser, raw, STATE_DCS_IGNORE,
+ ACTION_NONE);
+ case 0x40 ... 0x7e: /* ['@' - '~'] */
+ return parser_transition(parser, raw, STATE_DCS_PASS,
+ ACTION_DCS_CONSUME);
+ case 0x7f: /* DEL */
+ return parser_transition(parser, raw, STATE_NONE,
+ ACTION_IGNORE);
+ case 0x9c: /* ST */
+ return parser_transition(parser, raw, STATE_GROUND,
+ ACTION_IGNORE);
+ }
+
+ return parser_transition(parser, raw,
+ STATE_DCS_PASS, ACTION_DCS_CONSUME);
+ case STATE_DCS_PASS:
+ switch (raw) {
+ case 0x00 ... 0x7e: /* ASCII \ { DEL } */
+ return parser_transition(parser, raw, STATE_NONE,
+ ACTION_DCS_COLLECT);
+ case 0x7f: /* DEL */
+ return parser_transition(parser, raw, STATE_NONE,
+ ACTION_IGNORE);
+ case 0x9c: /* ST */
+ return parser_transition(parser, raw, STATE_GROUND,
+ ACTION_DCS_DISPATCH);
+ }
+
+ return parser_transition(parser, raw,
+ STATE_NONE, ACTION_DCS_COLLECT);
+ case STATE_DCS_IGNORE:
+ switch (raw) {
+ case 0x00 ... 0x7f: /* ASCII */
+ return parser_transition(parser, raw, STATE_NONE,
+ ACTION_IGNORE);
+ case 0x9c: /* ST */
+ return parser_transition(parser, raw, STATE_GROUND,
+ ACTION_NONE);
+ }
+
+ return parser_transition(parser, raw,
+ STATE_NONE, ACTION_NONE);
+ case STATE_OSC_STRING:
+ switch (raw) {
+ case 0x00 ... 0x06: /* C0 \ { BEL } */
+ case 0x08 ... 0x1f:
+ return parser_transition(parser, raw, STATE_NONE,
+ ACTION_IGNORE);
+ case 0x20 ... 0x7f: /* [' ' - DEL] */
+ return parser_transition(parser, raw, STATE_NONE,
+ ACTION_OSC_COLLECT);
+ case 0x07: /* BEL */
+ case 0x9c: /* ST */
+ return parser_transition(parser, raw, STATE_GROUND,
+ ACTION_OSC_DISPATCH);
+ }
+
+ return parser_transition(parser, raw,
+ STATE_NONE, ACTION_OSC_COLLECT);
+ case STATE_ST_IGNORE:
+ switch (raw) {
+ case 0x00 ... 0x7f: /* ASCII */
+ return parser_transition(parser, raw,
+ STATE_NONE, ACTION_IGNORE);
+ case 0x9c: /* ST */
+ return parser_transition(parser, raw,
+ STATE_GROUND, ACTION_IGNORE);
+ }
+
+ return parser_transition(parser, raw,
+ STATE_NONE, ACTION_NONE);
+ }
+
+ WARN(1, "bad vte-parser state");
+ return -EINVAL;
+}
+
+int vte_parser_feed(struct vte_parser *parser,
+ const struct vte_seq **seq_out,
+ u32 raw)
+{
+ int ret;
+
+ /*
+ * Notes:
+ * * DEC treats GR codes as GL. We don't do that as we require UTF-8
+ * as charset and, thus, it doesn't make sense to treat GR special.
+ * * During control sequences, unexpected C1 codes cancel the sequence
+ * and immediately start a new one. C0 codes, however, may or may not
+ * be ignored/executed depending on the sequence.
+ */
+
+ switch (raw) {
+ case 0x18: /* CAN */
+ ret = parser_transition(parser, raw,
+ STATE_GROUND, ACTION_IGNORE);
+ break;
+ case 0x1a: /* SUB */
+ ret = parser_transition(parser, raw,
+ STATE_GROUND, ACTION_EXECUTE);
+ break;
+ case 0x80 ... 0x8f: /* C1 \ {DCS, SOS, CSI, ST, OSC, PM, APC} */
+ case 0x91 ... 0x97:
+ case 0x99 ... 0x9a:
+ ret = parser_transition(parser, raw,
+ STATE_GROUND, ACTION_EXECUTE);
+ break;
+ case 0x1b: /* ESC */
+ ret = parser_transition(parser, raw,
+ STATE_ESC, ACTION_CLEAR);
+ break;
+ case 0x98: /* SOS */
+ case 0x9e: /* PM */
+ case 0x9f: /* APC */
+ ret = parser_transition(parser, raw,
+ STATE_ST_IGNORE, ACTION_NONE);
+ break;
+ case 0x90: /* DCS */
+ ret = parser_transition(parser, raw,
+ STATE_DCS_ENTRY, ACTION_CLEAR);
+ break;
+ case 0x9d: /* OSC */
+ ret = parser_transition(parser, raw,
+ STATE_OSC_STRING, ACTION_CLEAR);
+ break;
+ case 0x9b: /* CSI */
+ ret = parser_transition(parser, raw,
+ STATE_CSI_ENTRY, ACTION_CLEAR);
+ break;
+ default:
+ ret = parser_feed_to_state(parser, raw);
+ break;
+ }
+
+ if (ret <= 0)
+ *seq_out = NULL;
+ else
+ *seq_out = &parser->seq;
+
+ return ret;
+}
diff --git a/src/parser.hh b/src/parser.hh
new file mode 100644
index 0000000..55e162b
--- /dev/null
+++ b/src/parser.hh
@@ -0,0 +1,362 @@
+/*
+ * Copyright © 2015 David Herrmann <dh herrmann gmail com>
+ *
+ * vte is free software; you can redistribute it and/or modify it under
+ * the terms of the GNU Lesser General Public License as published by the
+ * Free Software Foundation; either version 3 of the License, or (at
+ * your option) any later version.
+ */
+
+#pragma once
+
+#include <cstdint>
+
+typedef uint8_t u8;
+typedef uint32_t u32;
+typedef uint64_t u64;
+
+struct vte_parser;
+struct vte_seq;
+struct vte_utf8;
+
+/*
+ * Charsets
+ * The DEC-compatible terminals require non-standard charsets for g0/g1/g2/g3
+ * registers. We only provide the basic sets for compatibility. New
+ * applications better use the full UTF-8 range for that.
+ */
+
+typedef uint32_t vte_charset[96];
+
+extern vte_charset vte_unicode_lower;
+extern vte_charset vte_unicode_upper;
+extern vte_charset vte_dec_supplemental_graphics;
+extern vte_charset vte_dec_special_graphics;
+
+/*
+ * UTF-8
+ * All stream data must be encoded as UTF-8. As we need to do glyph-rendering,
+ * we require a UTF-8 parser so we can map the characters to UCS codepoints.
+ */
+
+struct vte_utf8 {
+ u32 chars[5];
+ u32 ucs4;
+
+ unsigned int i_bytes : 3;
+ unsigned int n_bytes : 3;
+ unsigned int valid : 1;
+};
+
+size_t vte_utf8_decode(struct vte_utf8 *p, const u32 **out_buf, char c);
+size_t vte_utf8_encode(char *out_utf8, u32 g);
+
+/*
+ * Parsers
+ * The vte_parser object parses control-sequences for both host and terminal
+ * side. Based on this parser, there is a set of command-parsers that take a
+ * vte_seq sequence and returns the command it represents. This is different
+ * for host and terminal side, and so far we only provide the terminal side, as
+ * host side is not used by anyone.
+ */
+
+#define VTE_PARSER_ARG_MAX (16)
+
+enum {
+ VTE_SEQ_NONE, /* placeholder, no sequence parsed */
+
+ VTE_SEQ_IGNORE, /* no-op character */
+ VTE_SEQ_GRAPHIC, /* graphic character */
+ VTE_SEQ_CONTROL, /* control character */
+ VTE_SEQ_ESCAPE, /* escape sequence */
+ VTE_SEQ_CSI, /* control sequence function */
+ VTE_SEQ_DCS, /* device control string */
+ VTE_SEQ_OSC, /* operating system control */
+
+ VTE_SEQ_N,
+};
+
+enum {
+ /* these must be kept compatible to (1U << (ch - 0x20)) */
+
+ VTE_SEQ_FLAG_SPACE = (1U << 0), /* char: */
+ VTE_SEQ_FLAG_BANG = (1U << 1), /* char: ! */
+ VTE_SEQ_FLAG_DQUOTE = (1U << 2), /* char: " */
+ VTE_SEQ_FLAG_HASH = (1U << 3), /* char: # */
+ VTE_SEQ_FLAG_CASH = (1U << 4), /* char: $ */
+ VTE_SEQ_FLAG_PERCENT = (1U << 5), /* char: % */
+ VTE_SEQ_FLAG_AND = (1U << 6), /* char: & */
+ VTE_SEQ_FLAG_SQUOTE = (1U << 7), /* char: ' */
+ VTE_SEQ_FLAG_POPEN = (1U << 8), /* char: ( */
+ VTE_SEQ_FLAG_PCLOSE = (1U << 9), /* char: ) */
+ VTE_SEQ_FLAG_MULT = (1U << 10), /* char: * */
+ VTE_SEQ_FLAG_PLUS = (1U << 11), /* char: + */
+ VTE_SEQ_FLAG_COMMA = (1U << 12), /* char: , */
+ VTE_SEQ_FLAG_MINUS = (1U << 13), /* char: - */
+ VTE_SEQ_FLAG_DOT = (1U << 14), /* char: . */
+ VTE_SEQ_FLAG_SLASH = (1U << 15), /* char: / */
+
+ /* 16-25 is reserved for numbers; unused */
+
+ /* COLON is reserved = (1U << 26), char: : */
+ /* SEMICOLON is reserved = (1U << 27), char: ; */
+ VTE_SEQ_FLAG_LT = (1U << 28), /* char: < */
+ VTE_SEQ_FLAG_EQUAL = (1U << 29), /* char: = */
+ VTE_SEQ_FLAG_GT = (1U << 30), /* char: > */
+ VTE_SEQ_FLAG_WHAT = (1U << 31), /* char: ? */
+};
+
+enum {
+ VTE_CMD_NONE, /* placeholder */
+ VTE_CMD_GRAPHIC, /* graphics character */
+
+ VTE_CMD_BEL, /* bell */
+ VTE_CMD_BS, /* backspace */
+ VTE_CMD_CBT, /* cursor-backward-tabulation */
+ VTE_CMD_CHA, /* cursor-horizontal-absolute */
+ VTE_CMD_CHT, /* cursor-horizontal-forward-tabulation */
+ VTE_CMD_CNL, /* cursor-next-line */
+ VTE_CMD_CPL, /* cursor-previous-line */
+ VTE_CMD_CR, /* carriage-return */
+ VTE_CMD_CUB, /* cursor-backward */
+ VTE_CMD_CUD, /* cursor-down */
+ VTE_CMD_CUF, /* cursor-forward */
+ VTE_CMD_CUP, /* cursor-position */
+ VTE_CMD_CUU, /* cursor-up */
+ VTE_CMD_DA1, /* primary-device-attributes */
+ VTE_CMD_DA2, /* secondary-device-attributes */
+ VTE_CMD_DA3, /* tertiary-device-attributes */
+ VTE_CMD_DC1, /* device-control-1 or XON */
+ VTE_CMD_DC3, /* device-control-3 or XOFF */
+ VTE_CMD_DCH, /* delete-character */
+ VTE_CMD_DECALN, /* screen-alignment-pattern */
+ VTE_CMD_DECANM, /* ansi-mode */
+ VTE_CMD_DECBI, /* back-index */
+ VTE_CMD_DECCARA, /* change-attributes-in-rectangular-area */
+ VTE_CMD_DECCRA, /* copy-rectangular-area */
+ VTE_CMD_DECDC, /* delete-column */
+ VTE_CMD_DECDHL_BH, /* double-width-double-height-line: bottom half */
+ VTE_CMD_DECDHL_TH, /* double-width-double-height-line: top half */
+ VTE_CMD_DECDWL, /* double-width-single-height-line */
+ VTE_CMD_DECEFR, /* enable-filter-rectangle */
+ VTE_CMD_DECELF, /* enable-local-functions */
+ VTE_CMD_DECELR, /* enable-locator-reporting */
+ VTE_CMD_DECERA, /* erase-rectangular-area */
+ VTE_CMD_DECFI, /* forward-index */
+ VTE_CMD_DECFRA, /* fill-rectangular-area */
+ VTE_CMD_DECIC, /* insert-column */
+ VTE_CMD_DECID, /* return-terminal-id */
+ VTE_CMD_DECINVM, /* invoke-macro */
+ VTE_CMD_DECKBD, /* keyboard-language-selection */
+ VTE_CMD_DECKPAM, /* keypad-application-mode */
+ VTE_CMD_DECKPNM, /* keypad-numeric-mode */
+ VTE_CMD_DECLFKC, /* local-function-key-control */
+ VTE_CMD_DECLL, /* load-leds */
+ VTE_CMD_DECLTOD, /* load-time-of-day */
+ VTE_CMD_DECPCTERM, /* pcterm-mode */
+ VTE_CMD_DECPKA, /* program-key-action */
+ VTE_CMD_DECPKFMR, /* program-key-free-memory-report */
+ VTE_CMD_DECRARA, /* reverse-attributes-in-rectangular-area */
+ VTE_CMD_DECRC, /* restore-cursor */
+ VTE_CMD_DECREQTPARM, /* request-terminal-parameters */
+ VTE_CMD_DECRPKT, /* report-key-type */
+ VTE_CMD_DECRQCRA, /* request-checksum-of-rectangular-area */
+ VTE_CMD_DECRQDE, /* request-display-extent */
+ VTE_CMD_DECRQKT, /* request-key-type */
+ VTE_CMD_DECRQLP, /* request-locator-position */
+ VTE_CMD_DECRQM_ANSI, /* request-mode-ansi */
+ VTE_CMD_DECRQM_DEC, /* request-mode-dec */
+ VTE_CMD_DECRQPKFM, /* request-program-key-free-memory */
+ VTE_CMD_DECRQPSR, /* request-presentation-state-report */
+ VTE_CMD_DECRQTSR, /* request-terminal-state-report */
+ VTE_CMD_DECRQUPSS, /* request-user-preferred-supplemental-set */
+ VTE_CMD_DECSACE, /* select-attribute-change-extent */
+ VTE_CMD_DECSASD, /* select-active-status-display */
+ VTE_CMD_DECSC, /* save-cursor */
+ VTE_CMD_DECSCA, /* select-character-protection-attribute */
+ VTE_CMD_DECSCL, /* select-conformance-level */
+ VTE_CMD_DECSCP, /* select-communication-port */
+ VTE_CMD_DECSCPP, /* select-columns-per-page */
+ VTE_CMD_DECSCS, /* select-communication-speed */
+ VTE_CMD_DECSCUSR, /* set-cursor-style */
+ VTE_CMD_DECSDDT, /* select-disconnect-delay-time */
+ VTE_CMD_DECSDPT, /* select-digital-printed-data-type */
+ VTE_CMD_DECSED, /* selective-erase-in-display */
+ VTE_CMD_DECSEL, /* selective-erase-in-line */
+ VTE_CMD_DECSERA, /* selective-erase-rectangular-area */
+ VTE_CMD_DECSFC, /* select-flow-control */
+ VTE_CMD_DECSKCV, /* set-key-click-volume */
+ VTE_CMD_DECSLCK, /* set-lock-key-style */
+ VTE_CMD_DECSLE, /* select-locator-events */
+ VTE_CMD_DECSLPP, /* set-lines-per-page */
+ VTE_CMD_DECSLRM_OR_SC, /* set-left-and-right-margins or save-cursor */
+ VTE_CMD_DECSMBV, /* set-margin-bell-volume */
+ VTE_CMD_DECSMKR, /* select-modifier-key-reporting */
+ VTE_CMD_DECSNLS, /* set-lines-per-screen */
+ VTE_CMD_DECSPP, /* set-port-parameter */
+ VTE_CMD_DECSPPCS, /* select-pro-printer-character-set */
+ VTE_CMD_DECSPRTT, /* select-printer-type */
+ VTE_CMD_DECSR, /* secure-reset */
+ VTE_CMD_DECSRFR, /* select-refresh-rate */
+ VTE_CMD_DECSSCLS, /* set-scroll-speed */
+ VTE_CMD_DECSSDT, /* select-status-display-line-type */
+ VTE_CMD_DECSSL, /* select-setup-language */
+ VTE_CMD_DECST8C, /* set-tab-at-every-8-columns */
+ VTE_CMD_DECSTBM, /* set-top-and-bottom-margins */
+ VTE_CMD_DECSTR, /* soft-terminal-reset */
+ VTE_CMD_DECSTRL, /* set-transmit-rate-limit */
+ VTE_CMD_DECSWBV, /* set-warning-bell-volume */
+ VTE_CMD_DECSWL, /* single-width-single-height-line */
+ VTE_CMD_DECTID, /* select-terminal-id */
+ VTE_CMD_DECTME, /* terminal-mode-emulation */
+ VTE_CMD_DECTST, /* invoke-confidence-test */
+ VTE_CMD_DL, /* delete-line */
+ VTE_CMD_DSR_ANSI, /* device-status-report-ansi */
+ VTE_CMD_DSR_DEC, /* device-status-report-dec */
+ VTE_CMD_ECH, /* erase-character */
+ VTE_CMD_ED, /* erase-in-display */
+ VTE_CMD_EL, /* erase-in-line */
+ VTE_CMD_ENQ, /* enquiry */
+ VTE_CMD_EPA, /* end-of-guarded-area */
+ VTE_CMD_FF, /* form-feed */
+ VTE_CMD_HPA, /* horizontal-position-absolute */
+ VTE_CMD_HPR, /* horizontal-position-relative */
+ VTE_CMD_HT, /* horizontal-tab */
+ VTE_CMD_HTS, /* horizontal-tab-set */
+ VTE_CMD_HVP, /* horizontal-and-vertical-position */
+ VTE_CMD_ICH, /* insert-character */
+ VTE_CMD_IL, /* insert-line */
+ VTE_CMD_IND, /* index */
+ VTE_CMD_LF, /* line-feed */
+ VTE_CMD_LS1R, /* locking-shift-1-right */
+ VTE_CMD_LS2, /* locking-shift-2 */
+ VTE_CMD_LS2R, /* locking-shift-2-right */
+ VTE_CMD_LS3, /* locking-shift-3 */
+ VTE_CMD_LS3R, /* locking-shift-3-right */
+ VTE_CMD_MC_ANSI, /* media-copy-ansi */
+ VTE_CMD_MC_DEC, /* media-copy-dec */
+ VTE_CMD_NEL, /* next-line */
+ VTE_CMD_NP, /* next-page */
+ VTE_CMD_NULL, /* null */
+ VTE_CMD_PP, /* preceding-page */
+ VTE_CMD_PPA, /* page-position-absolute */
+ VTE_CMD_PPB, /* page-position-backward */
+ VTE_CMD_PPR, /* page-position-relative */
+ VTE_CMD_RC, /* restore-cursor */
+ VTE_CMD_REP, /* repeat */
+ VTE_CMD_RI, /* reverse-index */
+ VTE_CMD_RIS, /* reset-to-initial-state */
+ VTE_CMD_RM_ANSI, /* reset-mode-ansi */
+ VTE_CMD_RM_DEC, /* reset-mode-dec */
+ VTE_CMD_S7C1T, /* set-7bit-c1-terminal */
+ VTE_CMD_S8C1T, /* set-8bit-c1-terminal */
+ VTE_CMD_SCS, /* select-character-set */
+ VTE_CMD_SD, /* scroll-down */
+ VTE_CMD_SGR, /* select-graphics-rendition */
+ VTE_CMD_SI, /* shift-in */
+ VTE_CMD_SM_ANSI, /* set-mode-ansi */
+ VTE_CMD_SM_DEC, /* set-mode-dec */
+ VTE_CMD_SO, /* shift-out */
+ VTE_CMD_SPA, /* start-of-protected-area */
+ VTE_CMD_SS2, /* single-shift-2 */
+ VTE_CMD_SS3, /* single-shift-3 */
+ VTE_CMD_ST, /* string-terminator */
+ VTE_CMD_SU, /* scroll-up */
+ VTE_CMD_SUB, /* substitute */
+ VTE_CMD_TBC, /* tab-clear */
+ VTE_CMD_VPA, /* vertical-line-position-absolute */
+ VTE_CMD_VPR, /* vertical-line-position-relative */
+ VTE_CMD_VT, /* vertical-tab */
+ VTE_CMD_XTERM_CLLHP, /* xterm-cursor-lower-left-hp-bugfix */
+ VTE_CMD_XTERM_IHMT, /* xterm-initiate-highlight-mouse-tracking */
+ VTE_CMD_XTERM_MLHP, /* xterm-memory-lock-hp-bugfix */
+ VTE_CMD_XTERM_MUHP, /* xterm-memory-unlock-hp-bugfix */
+ VTE_CMD_XTERM_RPM, /* xterm-restore-private-mode */
+ VTE_CMD_XTERM_RRV, /* xterm-reset-resource-value */
+ VTE_CMD_XTERM_RTM, /* xterm-reset-title-mode */
+ VTE_CMD_XTERM_SACL1, /* xterm-set-ansi-conformance-level-1 */
+ VTE_CMD_XTERM_SACL2, /* xterm-set-ansi-conformance-level-2 */
+ VTE_CMD_XTERM_SACL3, /* xterm-set-ansi-conformance-level-3 */
+ VTE_CMD_XTERM_SDCS, /* xterm-set-default-character-set */
+ VTE_CMD_XTERM_SGFX, /* xterm-sixel-graphics */
+ VTE_CMD_XTERM_SPM, /* xterm-set-private-mode */
+ VTE_CMD_XTERM_SRV, /* xterm-set-resource-value */
+ VTE_CMD_XTERM_STM, /* xterm-set-title-mode */
+ VTE_CMD_XTERM_SUCS, /* xterm-set-utf8-character-set */
+ VTE_CMD_XTERM_WM, /* xterm-window-management */
+
+ VTE_CMD_N,
+};
+
+enum {
+ /*
+ * Charsets: DEC marks charsets according to "Digital Equ. Corp.".
+ * NRCS marks charsets according to the "National Replacement
+ * Character Sets". ISO marks charsets according to ISO-8859.
+ * The USERDEF charset is special and can be modified by the host.
+ */
+
+ VTE_CHARSET_NONE,
+
+ /* 96-compat charsets */
+ VTE_CHARSET_ISO_LATIN1_SUPPLEMENTAL,
+ VTE_CHARSET_BRITISH_NRCS = VTE_CHARSET_ISO_LATIN1_SUPPLEMENTAL,
+ VTE_CHARSET_ISO_LATIN2_SUPPLEMENTAL,
+ VTE_CHARSET_AMERICAN_NRCS = VTE_CHARSET_ISO_LATIN2_SUPPLEMENTAL,
+ VTE_CHARSET_ISO_LATIN5_SUPPLEMENTAL,
+ VTE_CHARSET_ISO_GREEK_SUPPLEMENTAL,
+ VTE_CHARSET_ISO_HEBREW_SUPPLEMENTAL,
+ VTE_CHARSET_ISO_LATIN_CYRILLIC,
+
+ VTE_CHARSET_96_N,
+
+ /* 94-compat charsets */
+ VTE_CHARSET_DEC_SPECIAL_GRAPHIC = VTE_CHARSET_96_N,
+ VTE_CHARSET_DEC_SUPPLEMENTAL,
+ VTE_CHARSET_DEC_TECHNICAL,
+ VTE_CHARSET_CYRILLIC_DEC,
+ VTE_CHARSET_DUTCH_NRCS,
+ VTE_CHARSET_FINNISH_NRCS,
+ VTE_CHARSET_FRENCH_NRCS,
+ VTE_CHARSET_FRENCH_CANADIAN_NRCS,
+ VTE_CHARSET_GERMAN_NRCS,
+ VTE_CHARSET_GREEK_DEC,
+ VTE_CHARSET_GREEK_NRCS,
+ VTE_CHARSET_HEBREW_DEC,
+ VTE_CHARSET_HEBREW_NRCS,
+ VTE_CHARSET_ITALIAN_NRCS,
+ VTE_CHARSET_NORWEGIAN_DANISH_NRCS,
+ VTE_CHARSET_PORTUGUESE_NRCS,
+ VTE_CHARSET_RUSSIAN_NRCS,
+ VTE_CHARSET_SCS_NRCS,
+ VTE_CHARSET_SPANISH_NRCS,
+ VTE_CHARSET_SWEDISH_NRCS,
+ VTE_CHARSET_SWISS_NRCS,
+ VTE_CHARSET_TURKISH_DEC,
+ VTE_CHARSET_TURKISH_NRCS,
+
+ VTE_CHARSET_94_N,
+
+ /* special charsets */
+ VTE_CHARSET_USERPREF_SUPPLEMENTAL = VTE_CHARSET_94_N,
+
+ VTE_CHARSET_N,
+};
+
+struct vte_seq {
+ unsigned int type;
+ unsigned int command;
+ u32 terminator;
+ unsigned int intermediates;
+ unsigned int charset;
+ unsigned int n_args;
+ int args[VTE_PARSER_ARG_MAX];
+ unsigned int n_st;
+ char *st;
+};
+
+int vte_parser_new(struct vte_parser **out);
+struct vte_parser *vte_parser_free(struct vte_parser *parser);
+int vte_parser_feed(struct vte_parser *parser,
+ const struct vte_seq **seq_out,
+ u32 raw);
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