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/* sfd.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 subfont* subfontp=NULL;
static struct subfont* ReadSubfont(char* sfdname, char *infix)
{
char *pos,*max,*sfdfile=NULL;
struct subfont* sfdp=NULL;
struct filemmap fmmap;
boolean mmapfailed;
/* OK, find subfont and look for correct infix */
#ifdef HAVE_KPSE_ENC_FORMATS
sfdfile=kpse_find_file(sfdname,kpse_sfd_format,false);
#endif
if (sfdfile == NULL) {
Warning("subfont file %s could not be found",sfdname);
return(NULL);
}
DEBUG_PRINT((DEBUG_FT|DEBUG_ENC),("\n OPEN SUBFONT:\t'%s'", sfdfile));
mmapfailed = MmapFile(sfdfile,&fmmap);
free(sfdfile);
if (mmapfailed)
return(NULL);
pos=fmmap.data;
max=fmmap.data+fmmap.size;
while(pos<max && (*pos==' ' || *pos=='\r' || *pos=='\n' || *pos=='\t')) pos++;
while (pos<max && *pos=='#') {
while(pos<max && *pos!='\r' && *pos!='\n') pos++;
while(pos<max && (*pos==' ' || *pos=='\r' || *pos=='\n' || *pos=='\t')) pos++;
}
while(pos+strlen(infix)<max
&& (strncmp(pos,infix,strlen(infix))!=0
|| (pos[strlen(infix)]!=' ' && pos[strlen(infix)]!='\t'))) {
/* skip lines, taking line continuation into account */
while(pos+1<max && (*(pos+1)!='\r' || *(pos+1)!='\n' || *pos=='\\'))
pos++;
pos++;
while(pos<max && (*pos==' ' || *pos=='\r' || *pos=='\n' || *pos=='\t')) pos++;
while (pos<max && *pos=='#') {
while(pos<max && *pos!='\r' && *pos!='\n') pos++;
while(pos<max && (*pos==' ' || *pos=='\r' || *pos=='\n' || *pos=='\t')) pos++;
}
}
pos=pos+strlen(infix);
if (pos<max) {
int number,range,codepoint=0;
if ((sfdp = calloc(sizeof(struct subfont)+strlen(sfdname)+1
+strlen(infix)+1,1))==NULL) {
Warning("cannot allocate memory for subfont",sfdname);
UnMmapFile(&fmmap);
return(NULL);
}
sfdp->name=(char*)sfdp+sizeof(struct subfont);
strcpy(sfdp->name,sfdname);
sfdp->infix=(char*)sfdp+sizeof(struct subfont)+strlen(sfdname)+1;
strcpy(sfdp->infix,infix);
sfdp->encoding=FT_ENCODING_UNICODE;
while (pos<max && *pos != '\r' && *pos != '\n') {
number=strtol(pos,&pos,0);
while(pos<max && (*pos==' ' || *pos=='\t')) pos++;
switch(*pos) {
case ':':
codepoint=number;
pos++;
break;
case '_':
range=strtol(pos+1,&pos,0);
while(codepoint<256 && number<range) {
sfdp->charindex[codepoint]=number;
DEBUG_PRINT(DEBUG_ENC,("\n SUBFONT MAP %d %d",codepoint,number));
number++;
codepoint++;
}
default:
if (codepoint<256)
sfdp->charindex[codepoint]=number;
DEBUG_PRINT(DEBUG_ENC,("\n SUBFONT MAP %d %d",codepoint,number));
}
while(pos<max && (*pos==' ' || *pos=='\t')) pos++;
/* take line continuation into account */
while(pos+1<max && *pos=='\\' && (*(pos+1)=='\r' || *(pos+1)=='\n')) {
if (pos+2<max && *(pos+1)=='\r' && *(pos+2)=='\n') pos++;
pos+=2;
while(pos<max && (*pos==' ' || *pos=='\t')) pos++;
}
}
}
return (sfdp);
}
struct psfontmap* FindSubFont(struct psfontmap* entry, char* fontname)
{
struct subfont *temp=subfontp;
char *sfdspec=entry->tfmname,*sfdwant=fontname,
*sfdname,*infix,*postfix;
while (*sfdspec!='\0' && *sfdspec==*sfdwant) {
sfdspec++;
sfdwant++;
}
/* Find delimiter */
if (*sfdspec!='@')
return(NULL);
sfdspec++;
postfix=sfdspec;
while (*postfix!='\0' && *postfix!='@')
postfix++;
if (*postfix!='@')
return(NULL);
/* Extract subfont name */
if ((sfdname=malloc(postfix-sfdspec+1))==NULL)
Fatal("cannot allocate memory for subfont name");
strncpy(sfdname,sfdspec,postfix-sfdspec);
sfdname[postfix-sfdspec]='\0';
/* Check postfix */
postfix++;
if (strcmp(sfdwant+strlen(sfdwant)-strlen(postfix),postfix)!=0)
return(NULL);
/* Extract infix */
if ((infix=malloc(strlen(sfdwant)-strlen(postfix)+1))==NULL)
Fatal("cannot allocate memory for subfont infix");
strncpy(infix,sfdwant,strlen(sfdwant)-strlen(postfix));
infix[strlen(sfdwant)-strlen(postfix)]='\0';
DEBUG_PRINT(DEBUG_ENC,("\n SUBFONT %s %s %s",fontname,sfdname,infix));
/* Find subfont */
while(temp!=NULL
&& (strcmp(sfdname,temp->name)!=0 || strcmp(infix,temp->infix)!=0))
temp=temp->next;
if (temp==NULL) {
temp=ReadSubfont(sfdname,infix);
if (temp!=NULL) {
temp->next=subfontp;
subfontp=temp;
}
}
entry=NewPSFont(entry);
if (entry!=NULL) {
entry->tfmname=copyword(fontname);
entry->subfont=temp;
}
free(infix);
free(sfdname);
return(entry);
}
void ClearSubfont(void)
{
struct subfont *temp=subfontp;
while(temp!=NULL) {
subfontp=subfontp->next;
free(temp);
temp=subfontp;
}
}
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