diff options
Diffstat (limited to 'dvi/mdvi-lib/special.c')
| -rw-r--r-- | dvi/mdvi-lib/special.c | 248 |
1 files changed, 0 insertions, 248 deletions
diff --git a/dvi/mdvi-lib/special.c b/dvi/mdvi-lib/special.c deleted file mode 100644 index 23c070e..0000000 --- a/dvi/mdvi-lib/special.c +++ /dev/null @@ -1,248 +0,0 @@ -/* - * Copyright (C) 2000, Matias Atria - * - * 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 2 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, write to the Free Software - * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA - */ - -#include <ctype.h> -#include <string.h> - -#include "mdvi.h" -#include "private.h" - -#if defined(WITH_REGEX_SPECIALS) && defined(HAVE_REGEX_H) -#include <regex.h> -#endif - -typedef struct _DviSpecial { - struct _DviSpecial *next; - struct _DviSpecial *prev; - char *label; - char *prefix; - size_t plen; -#ifdef WITH_REGEX_SPECIALS - regex_t reg; - int has_reg; -#endif - DviSpecialHandler handler; -} DviSpecial; - -static ListHead specials = {NULL, NULL, 0}; - -#define SPECIAL(x) \ - void x __PROTO((DviContext *, const char *, const char *)) - -static SPECIAL(sp_layer); -extern SPECIAL(epsf_special); -extern SPECIAL(do_color_special); - -static struct { - char *label; - char *prefix; - char *regex; - DviSpecialHandler handler; -} builtins[] = { - {"Layers", "layer", NULL, sp_layer}, - {"EPSF", "psfile", NULL, epsf_special} -}; -#define NSPECIALS (sizeof(builtins) / sizeof(builtins[0])) -static int registered_builtins = 0; - -static void register_builtin_specials(void) -{ - int i; - - ASSERT(registered_builtins == 0); - for(i = 0; i < NSPECIALS; i++) - mdvi_register_special( - builtins[i].label, - builtins[i].prefix, - builtins[i].regex, - builtins[i].handler, - 1 /* replace if exists */); - registered_builtins = 1; -} - -static DviSpecial *find_special_prefix(const char *prefix) -{ - DviSpecial *sp; - - /* should have a hash table here, but I'm so lazy */ - for(sp = (DviSpecial *)specials.head; sp; sp = sp->next) { - if(STRCEQ(sp->prefix, prefix)) - break; - } - return sp; -} - -int mdvi_register_special(const char *label, const char *prefix, - const char *regex, DviSpecialHandler handler, int replace) -{ - DviSpecial *sp; - int newsp = 0; - - if(!registered_builtins) - register_builtin_specials(); - - sp = find_special_prefix(prefix); - if(sp == NULL) { - sp = xalloc(DviSpecial); - sp->prefix = mdvi_strdup(prefix); - newsp = 1; - } else if(!replace) - return -1; - else { - mdvi_free(sp->label); - sp->label = NULL; - } - -#ifdef WITH_REGEX_SPECIALS - if(!newsp && sp->has_reg) { - regfree(&sp->reg); - sp->has_reg = 0; - } - if(regex && regcomp(&sp->reg, regex, REG_NOSUB) != 0) { - if(newsp) { - mdvi_free(sp->prefix); - mdvi_free(sp); - } - return -1; - } - sp->has_reg = (regex != NULL); -#endif - sp->handler = handler; - sp->label = mdvi_strdup(label); - sp->plen = strlen(prefix); - if(newsp) - listh_prepend(&specials, LIST(sp)); - DEBUG((DBG_SPECIAL, - "New \\special handler `%s' with prefix `%s'\n", - label, prefix)); - return 0; -} - -int mdvi_unregister_special(const char *prefix) -{ - DviSpecial *sp; - - sp = find_special_prefix(prefix); - if(sp == NULL) - return -1; - mdvi_free(sp->prefix); -#ifdef WITH_REGEX_SPECIALS - if(sp->has_reg) - regfree(&sp->reg); -#endif - listh_remove(&specials, LIST(sp)); - mdvi_free(sp); - return 0; -} - -#define IS_PREFIX_DELIMITER(x) (strchr(" \t\n:=", (x)) != NULL) - -int mdvi_do_special(DviContext *dvi, char *string) -{ - char *prefix; - char *ptr; - DviSpecial *sp; - - if(!registered_builtins) { - } - - if(!string || !*string) - return 0; - - /* skip leading spaces */ - while(*string && isspace(*string)) - string++; - - DEBUG((DBG_SPECIAL, "Looking for a handler for `%s'\n", string)); - - /* now try to find a match */ - ptr = string; - for(sp = (DviSpecial *)specials.head; sp; sp = sp->next) { -#ifdef WITH_REGEX_SPECIALS - if(sp->has_reg && !regexec(&sp->reg, ptr, 0, 0, 0)) - break; -#endif - /* check the prefix */ - if(STRNCEQ(sp->prefix, ptr, sp->plen)) { - ptr += sp->plen; - break; - } - } - - if(sp == NULL) { - DEBUG((DBG_SPECIAL, "None found\n")); - return -1; - } - - /* extract the prefix */ - if(ptr == string) { - prefix = NULL; - DEBUG((DBG_SPECIAL, - "REGEX match with `%s' (arg `%s')\n", - sp->label, ptr)); - } else { - if(*ptr) *ptr++ = 0; - prefix = string; - DEBUG((DBG_SPECIAL, - "PREFIX match with `%s' (prefix `%s', arg `%s')\n", - sp->label, prefix, ptr)); - } - - /* invoke the handler */ - sp->handler(dvi, prefix, ptr); - - return 0; -} - -void mdvi_flush_specials(void) -{ - DviSpecial *sp, *list; - - - for(list = (DviSpecial *)specials.head; (sp = list); ) { - list = sp->next; - if(sp->prefix) mdvi_free(sp->prefix); - if(sp->label) mdvi_free(sp->label); -#ifdef WITH_REGEX_SPECIALS - if(sp->has_reg) - regfree(&sp->reg); -#endif - mdvi_free(sp); - } - specials.head = NULL; - specials.tail = NULL; - specials.count = 0; -} - -/* some builtin specials */ - -void sp_layer(DviContext *dvi, const char *prefix, const char *arg) -{ - if(STREQ("push", arg)) - dvi->curr_layer++; - else if(STREQ("pop", arg)) { - if(dvi->curr_layer) - dvi->curr_layer--; - else - warning(_("%s: tried to pop top level layer\n"), - dvi->filename); - } else if(STREQ("reset", arg)) - dvi->curr_layer = 0; - DEBUG((DBG_SPECIAL, "Layer level: %d\n", dvi->curr_layer)); -} - |