1 files changed, 129 insertions, 0 deletions
diff --git a/dviware/dvipng/enc.c b/dviware/dvipng/enc.c
new file mode 100644
index 0000000000..03224769c7
--- /dev/null
+++ b/dviware/dvipng/enc.c
@@ -0,0 +1,129 @@
+/* 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;
+  }
+}