X-Git-Url: http://www.chiark.greenend.org.uk/ucgi/~yarrgweb/git?a=blobdiff_plain;f=pctb%2Focr.c;h=7eb871a68844acc1d802747e67346aed760b3729;hb=d3eaa28d304c5b0639bc0f7e29b3285317d5c1e7;hp=48c25c085661579d75d4eca2622802dcfb19151c;hpb=3fad53f3bc8c29335f290c1fb5e2563b711becfc;p=ypp-sc-tools.main.git

diff --git a/pctb/ocr.c b/pctb/ocr.c
index 48c25c0..7eb871a 100644
--- a/pctb/ocr.c
+++ b/pctb/ocr.c
@@ -63,12 +63,19 @@ static void readdb(OcrReader *rd) {
   char lbuf[100];
   FILE *db;
 
+  for (ctxi=0; ctxi<NCONTEXTS; ctxi++)
+    cleardb_node(&rd->contexts[ctxi]);
+
   char *dbfname=0;
   asprintf(&dbfname,"%s/charset-%d.txt",get_vardir(),rd->h);
   eassert(dbfname);
   
-  db= fopen(dbfname,"r");  eassert(db);
+  db= fopen(dbfname,"r");
   free(dbfname);
+  if (!db) {
+    eassert(errno==ENOENT);
+    return;
+  }
 
   FGETSLINE(db,lbuf);
   eassert(!strcmp(lbuf,"# ypp-sc-tools pctb font v1"));
@@ -77,9 +84,6 @@ static void readdb(OcrReader *rd) {
   eassert(r==1);
   eassert(h==rd->h);
 
-  for (ctxi=0; ctxi<NCONTEXTS; ctxi++)
-    cleardb_node(&rd->contexts[ctxi]);
-
   for (;;) {
     FGETSLINE(db,lbuf);
     if (!lbuf || lbuf[0]=='#') continue;
@@ -282,6 +286,15 @@ const struct OcrCellTypeInfo ocr_celltype_text= {
   .midword=1 /* Lower only */
 };
 
+static void vdebugf(const char *fmt, va_list al) {
+#ifdef DEBUG_OCR
+  vfprintf(debug,fmt,al);
+#endif
+}
+static void debugf(const char *fmt, ...) {
+  va_list al;  va_start(al,fmt);  vdebugf(fmt,al);  va_end(al);
+}
+
 OcrResultGlyph *ocr(OcrReader *rd, OcrCellType ct, int w, Pixcol cols[]) {
   int nspaces;
   unsigned ctxmap;
@@ -292,9 +305,9 @@ OcrResultGlyph *ocr(OcrReader *rd, OcrCellType ct, int w, Pixcol cols[]) {
   nspaces=- w;
   ctxmap= ct->initial;
   rd->nresults=0;
-  fprintf(debug,"OCR h=%d w=%d",rd->h,w);
-  for (x=0; x<w; x++) fprintf(debug," %"PSPIXCOL(PRIx),cols[x]);
-  fprintf(debug,"\n");
+  debugf("OCR h=%d w=%d",rd->h,w);
+  for (x=0; x<w; x++) debugf(" %"PSPIXCOL(PRIx),cols[x]);
+  debugf("\n");
   debug_flush();
 
   x=0;
@@ -308,7 +321,7 @@ OcrResultGlyph *ocr(OcrReader *rd, OcrCellType ct, int w, Pixcol cols[]) {
       nspaces++;
       x++;
       if (nspaces==SPACE_SPACES) {
-	fprintf(debug,"OCR  x=%x nspaces=%d space\n",x,nspaces);
+	debugf("OCR  x=%x nspaces=%d space\n",x,nspaces);
 	ctxmap= ct->nextword;
       }
       continue;
@@ -325,7 +338,7 @@ OcrResultGlyph *ocr(OcrReader *rd, OcrCellType ct, int w, Pixcol cols[]) {
     DatabaseNode *uniquematch= 0;
     int uniquematch_rx=-1;
     
-    fprintf(debug,"OCR  lx=%d ctxmap=%x  ",lx,ctxmap);
+    debugf("OCR  lx=%d ctxmap=%x  ",lx,ctxmap);
 
     for (ctxi=0; ctxi<NCONTEXTS; ctxi++) {
       DatabaseNode *current= &rd->contexts[ctxi];;
@@ -334,29 +347,29 @@ OcrResultGlyph *ocr(OcrReader *rd, OcrCellType ct, int w, Pixcol cols[]) {
 
       x= lx;
       if (!(ctxmap & (1u << ctxi))) continue;
-      fprintf(debug," || %s",context_names[ctxi]);
+      debugf(" || %s",context_names[ctxi]);
 
       for (;;) {
 	debug_flush();
-	fprintf(debug," | x=%d",x);
+	debugf(" | x=%d",x);
 	if (x>w) break;
 	Pixcol cv= cols[x];
-	fprintf(debug," cv=%"PSPIXCOL(PRIx),cv);
+	debugf(" cv=%"PSPIXCOL(PRIx),cv);
 	for (i=0; i<current->nlinks; i++)
 	  if (current->links[i].col == cv)
 	    goto found;
 	/* not found */
-	fprintf(debug," ?");
+	debugf(" ?");
 	break;
 
       found:
 	current= current->links[i].then;
 	if (current->s[0]) {
-	  fprintf(debug," \"%s\"",current->s);
+	  debugf(" \"%s\"",current->s);
 	  bestmatch= current;
 	  bestmatch_rx= x;
 	} else {
-	  fprintf(debug," ...");
+	  debugf(" ...");
 	}
 
 	x++;
@@ -364,7 +377,7 @@ OcrResultGlyph *ocr(OcrReader *rd, OcrCellType ct, int w, Pixcol cols[]) {
       
       if (bestmatch) {
 	if (uniquematch && strcmp(bestmatch->s, uniquematch->s)) {
-	  fprintf(debug, " ambiguous");
+	  debugf( " ambiguous");
 	  uniquematch= 0;
 	  break;
 	}
@@ -374,22 +387,22 @@ OcrResultGlyph *ocr(OcrReader *rd, OcrCellType ct, int w, Pixcol cols[]) {
     }
 
     if (uniquematch) {
-      fprintf(debug," || YES\n");
+      debugf(" || YES\n");
       add_result(rd, uniquematch->s, lx, uniquematch_rx, ctxmap);
       x= uniquematch_rx+1;
       ctxmap= ct->midword;
     } else {
       int rx;
-      fprintf(debug," || UNKNOWN");
+      debugf(" || UNKNOWN");
       for (rx=lx; rx<w && cols[rx]; rx++);
-      fprintf(debug," x=%d ctxmap=%x %d..%d\n",x, ctxmap, lx,rx);
+      debugf(" x=%d ctxmap=%x %d..%d\n",x, ctxmap, lx,rx);
       debug_flush();
       callout_unknown(rd, w,cols, lx,rx-1, ctxmap);
       goto restart;
     }
   }
   add_result(rd, 0,-1,-1,0);
-  fprintf(debug,"OCR  finished %d glyphs\n",rd->nresults);
+  debugf("OCR  finished %d glyphs\n",rd->nresults);
   debug_flush();
   return rd->results;
 }