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lisp.c
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lisp.c
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/*
* Lisp Source mode for QEmacs.
*
* Copyright (c) 2000-2008 Charlie Gordon.
*
* This library 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 2 of the License, or (at your option) any later version.
*
* This library 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
* Lesser General Public License for more details.
*
* You should have received a copy of the GNU Lesser General Public
* License along with this library; if not, write to the Free Software
* Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
*/
#include "qe.h"
/* TODO: lisp-indent = 2 */
static const char *lisp_mode_extensions = "ll|li|lh|lo|lm|lisp|el";
/*---------------- Lisp colors ----------------*/
#define IN_COMMENT 0x01
#define IN_STRING 0x02
#define LISP_TEXT QE_STYLE_DEFAULT
#define LISP_COMMENT QE_STYLE_COMMENT
#define LISP_STRING QE_STYLE_STRING
static void lisp_colorize_line(unsigned int *str, int n, int *statep,
__unused__ int state_only)
{
int colstate = *statep;
int i = 0, j = 0;
if (colstate & IN_STRING)
goto instring;
if (colstate & IN_COMMENT) {
for (j = i; j < n; j++) {
if (str[j] == '|'
&& str[j + 1] == '#') {
j += 2;
colstate = 0;
break;
}
}
set_color(str + i, str + j, LISP_COMMENT);
i = j;
}
while (i < n) {
switch (str[i]) {
case ';':
set_color(str + i, str + n, LISP_COMMENT);
i = n;
continue;
case '#':
/* check for block comment */
if (str[i + 1] == '|') {
colstate = IN_COMMENT;
for (j = i + 2; j < n; j++) {
if (str[j] == '|'
&& str[j + 1] == '#') {
j += 2;
colstate = 0;
break;
}
}
set_color(str + i, str + j, LISP_COMMENT);
i = j;
continue;
}
break;
case '"':
/* parse string const */
for (j = i + 1; j < n;) {
instring:
colstate |= IN_STRING;
if (str[j++] == '"') {
colstate &= ~IN_STRING;
break;
}
}
set_color(str + i, str + j, LISP_STRING);
i = j;
continue;
default:
break;
}
i++;
continue;
}
*statep = colstate;
}
#undef IN_STRING
#undef IN_COMMENT
#undef LISP_TEXT
#undef LISP_COMMENT
#undef LISP_STRING
static int lisp_mode_probe(ModeProbeData *p)
{
/* just check file extension */
if (match_extension(p->filename, lisp_mode_extensions)
|| strstart(p->filename, ".emacs", NULL))
return 80;
return 0;
}
static int lisp_mode_init(EditState *s, ModeSavedData *saved_data)
{
int ret;
ret = text_mode_init(s, saved_data);
if (ret)
return ret;
set_colorize_func(s, lisp_colorize_line);
return ret;
}
/* specific lisp commands */
static CmdDef lisp_commands[] = {
CMD_DEF_END,
};
static ModeDef lisp_mode;
static int lisp_init(void)
{
/* c mode is almost like the text mode, so we copy and patch it */
memcpy(&lisp_mode, &text_mode, sizeof(ModeDef));
lisp_mode.name = "Lisp";
lisp_mode.mode_probe = lisp_mode_probe;
lisp_mode.mode_init = lisp_mode_init;
qe_register_mode(&lisp_mode);
qe_register_cmd_table(lisp_commands, &lisp_mode);
return 0;
}
qe_module_init(lisp_init);