Pre-compile the standard CMaps into c-structs instead of parsing them at runtime.

1 files changed, 160 insertions, 0 deletions

diff --git a/cmapdump.c b/cmapdump.c
new file mode 100644
index 00000000..f6c5cb2e
--- /dev/null
+++ b/cmapdump.c
@@ -0,0 +1,160 @@
+/* cmapdump.c -- parse a CMap file and dump it as a c-struct */
+
+#include <stdio.h>
+#include <string.h>
+
+#include "fitz.h"
+#include "mupdf.h"
+
+#include "mupdf/pdf_lex.c"
+#include "mupdf/pdf_cmap.c"
+#include "mupdf/pdf_cmap_parse.c"
+
+char *
+flagtoname(int flag)
+{
+    switch (flag)
+    {
+	case PDF_CMAP_SINGLE: return "PDF_CMAP_SINGLE,";
+	case PDF_CMAP_RANGE:  return "PDF_CMAP_RANGE, ";
+	case PDF_CMAP_TABLE:  return "PDF_CMAP_TABLE, ";
+	case PDF_CMAP_MULTI:  return "PDF_CMAP_MULTI, ";
+    }
+    return "-1,";
+}
+
+void
+clean(char *p)
+{
+    while (*p)
+    {
+	if ((*p == '/') || (*p == '.') || (*p == '\\') || (*p == '-'))
+	    *p = '_';
+	p ++;
+    }
+}
+
+int
+main(int argc, char **argv)
+{
+    pdf_cmap *cmap;
+    fz_error *error;
+    fz_stream *fi;
+    FILE *fo;
+    char name[256];
+    char *realname;
+    char *p;
+    int i, k;
+
+    if (argc < 3)
+    {
+	fprintf(stderr, "usage: cmapdump output.c lots of cmap files\n");
+	return 1;
+    }
+
+    fo = fopen(argv[1], "wb");
+    if (!fo)
+    {
+	fprintf(stderr, "cmapdump: could not open output file\n");
+	return 1;
+    }
+
+    fprintf(fo, "#include \"fitz.h\"\n");
+    fprintf(fo, "#include \"mupdf.h\"\n");
+    fprintf(fo, "\n");
+
+    for (i = 2; i < argc; i++)
+    {
+	realname = strrchr(argv[i], '/');
+	if (!realname)
+	    realname = strrchr(argv[i], '\\');
+	if (realname)
+	    realname ++;
+	else
+	    realname = argv[i];
+
+	strcpy(name, realname);
+	p = name;
+	while (*p)
+	{
+	    if ((*p == '/') || (*p == '.') || (*p == '\\') || (*p == '-'))
+		*p = '_';
+	    p ++;
+	}
+
+	error = fz_openrfile(&fi, argv[i]);
+	if (error)
+	{
+	    fprintf(stderr, "cmapdump: could not open input file %s\n", argv[i]);
+	    fz_printerror(error);
+	    return 1;
+	}
+
+	error = pdf_parsecmap(&cmap, fi);
+	if (error)
+	{
+	    fprintf(stderr, "cmapdump: could not parse input cmap %s\n", argv[i]);
+	    fz_printerror(error);
+	    return 1;
+	}
+
+	fprintf(fo, "/*\n * %s\n */\n\n", cmap->cmapname);
+
+	fprintf(fo, "static const pdf_range pdf_cmap_%s_ranges[%d] =\n{\n",
+		name, cmap->rlen);
+	for (k = 0; k < cmap->rlen; k++)
+	{
+	    fprintf(fo, "    { 0x%04x, 0x%04x, %s %d },\n",
+		    cmap->ranges[k].low, cmap->ranges[k].high,
+		    flagtoname(cmap->ranges[k].flag),
+		    cmap->ranges[k].offset);
+	}
+	fprintf(fo, "};\n\n");
+
+	if (cmap->tlen == 0)
+	{
+	    fprintf(fo, "static const int pdf_cmap_%s_table[1] = { 0 };\n\n", name);
+	}
+	else
+	{
+	    fprintf(fo, "static const int pdf_cmap_%s_table[%d] =\n{",
+		    name, cmap->tlen);
+	    for (k = 0; k < cmap->tlen; k++)
+	    {
+		if (k % 8 == 0)
+		    fprintf(fo, "\n    ");
+		fprintf(fo, "%d, ", cmap->table[k]);
+	    }
+	    fprintf(fo, "\n};\n\n");
+	}
+
+	fprintf(fo, "pdf_cmap pdf_cmap_%s =\n", name);
+	fprintf(fo, "{\n");
+	fprintf(fo, "    -1, ");
+	fprintf(fo, "\"%s\", ", cmap->cmapname);
+	fprintf(fo, "\"%s\", 0, ", cmap->usecmapname);
+	fprintf(fo, "%d,\n", cmap->wmode);
+
+	fprintf(fo, "    %d, /* codespace table */\n", cmap->ncspace);
+	fprintf(fo, "    {\n");
+	for (k = 0; k < cmap->ncspace; k++)
+	{
+	    fprintf(fo, "\t{ %d, 0x%04x, 0x%04x },\n",
+		    cmap->cspace[k].n, cmap->cspace[k].lo, cmap->cspace[k].hi);
+	}
+	fprintf(fo, "    },\n");
+
+	fprintf(fo, "    %d, %d, (pdf_range*) pdf_cmap_%s_ranges,\n",
+		cmap->rlen, cmap->rlen, name);
+
+	fprintf(fo, "    %d, %d, (int*) pdf_cmap_%s_table,\n",
+		cmap->tlen, cmap->tlen, name);
+
+	fprintf(fo, "};\n\n");
+
+	fz_dropstream(fi);
+    }
+
+    return 0;
+}
+