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/* enc.c */
/************************************************************************
Part of the dvipng distribution
This program 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.
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
Lesser General Public License for more details.
You should have received a copy of the GNU Lesser General Public
License along with this program. If not, see
<http://www.gnu.org/licenses/>.
Copyright (C) 2002-2008 Jan-Åke Larsson
************************************************************************/
#include "dvipng.h"
struct encoding* encodingp=NULL;
static struct encoding* InitEncoding(char* encoding)
{
char *pos,*max,*buf,*enc_file;
int i;
struct encoding* encp=NULL;
struct filemmap fmmap;
boolean mmapfailed;
#ifdef HAVE_KPSE_ENC_FORMATS
enc_file=kpse_find_file(encoding,kpse_enc_format,false);
#else
enc_file=kpse_find_file(encoding,kpse_tex_ps_header_format,false);
#endif
if (enc_file == NULL) {
Warning("encoding file %s could not be found",encoding);
return(NULL);
}
DEBUG_PRINT((DEBUG_FT|DEBUG_ENC),("\n OPEN ENCODING:\t'%s'", enc_file));
mmapfailed = MmapFile(enc_file,&fmmap);
free(enc_file);
if (mmapfailed)
return(NULL);
if ((encp = calloc(sizeof(struct encoding)+strlen(encoding)+1
+fmmap.size,1))==NULL) {
Warning("cannot alloc space for encoding",encoding);
UnMmapFile(&fmmap);
return(NULL);
}
encp->name=(char*)encp+sizeof(struct encoding);
strcpy(encp->name,encoding);
pos=fmmap.data;
max=fmmap.data+fmmap.size;
buf=encp->name+strlen(encoding)+1;
#define SKIPCOMMENT(x) if (*x=='%') while (x<max && *x!='\r' && *x!='\n') x++;
while(pos<max && *pos!='/') {
SKIPCOMMENT(pos);
pos++;
}
pos++;
encp->charname[256]=buf;
while(pos<max && *pos!='[' && *pos!='%'
&& *pos!=' ' && *pos!='\t' && *pos!='\r' && *pos!='\n')
*buf++=*pos++;
*buf++='\0';
DEBUG_PRINT(DEBUG_ENC,("\n PS ENCODING '%s'",
encp->charname[256]));
while (pos < max && *pos!='[') {
SKIPCOMMENT(pos);
pos++;
}
while(pos<max && *pos!='/') {
SKIPCOMMENT(pos);
pos++;
}
i=0;
while(pos<max && *pos!=']') {
pos++;
encp->charname[i++]=buf;
while(pos<max && *pos!='%' && *pos!=' ' \
&& *pos!='\t' && *pos!='\r' && *pos!='\n')
*buf++=*pos++;
*buf++='\0';
DEBUG_PRINT(DEBUG_ENC,("\n PS ENCODING %d '%s'",
i-1,encp->charname[i-1]));
while(pos<max && *pos!='/' && *pos!=']') {
SKIPCOMMENT(pos);
pos++;
}
}
UnMmapFile(&fmmap);
return(encp);
}
struct encoding* FindEncoding(char* encoding)
{
struct encoding *temp=encodingp;
/* printf("{%s} \n",encoding); */
while(temp!=NULL && strcmp(encoding,temp->name)!=0)
temp=temp->next;
if (temp==NULL) {
temp=InitEncoding(encoding);
if (temp!=NULL) {
temp->next=encodingp;
encodingp=temp;
}
}
return(temp);
}
void ClearEncoding(void)
{
struct encoding *temp=encodingp;
while(temp!=NULL) {
encodingp=encodingp->next;
free(temp);
temp=encodingp;
}
}
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