Add cmap cleaning scripts.

One to write a CMap out in expanded form ready for text processing tools.
Another to write a CMap out as compactly as possible.

The output is not in proper CMap format and can only be parsed by MuPDF.

1 files changed, 238 insertions, 0 deletions

diff --git a/scripts/cmapcleanx.c b/scripts/cmapcleanx.c
new file mode 100644
index 00000000..5e0da4e0
--- /dev/null
+++ b/scripts/cmapcleanx.c
@@ -0,0 +1,238 @@
+/* cmapclean.c -- parse a CMap file and write it back out */
+
+#include <stdio.h>
+#include <string.h>
+
+/* We never want to build memento versions of the cmapdump util */
+#undef MEMENTO
+
+#include "mupdf/pdf.h"
+
+#include "../source/fitz/context.c"
+#include "../source/fitz/error.c"
+#include "../source/fitz/memory.c"
+#include "../source/fitz/string.c"
+#include "../source/fitz/buffer.c"
+#include "../source/fitz/stream-open.c"
+#include "../source/fitz/stream-read.c"
+#include "../source/fitz/printf.c"
+
+#include "../source/pdf/pdf-lex.c"
+#include "../source/pdf/pdf-cmap.c"
+#include "../source/pdf/pdf-cmap-parse.c"
+
+struct cidrange {
+	unsigned int lo, hi, v;
+};
+
+static int cmpcidrange(const void *va, const void *vb)
+{
+	unsigned int a = ((const struct cidrange *)va)->lo;
+	unsigned int b = ((const struct cidrange *)vb)->lo;
+	return a < b ? -1 : a > b ? 1 : 0;
+}
+
+static void pc(unsigned int c)
+{
+	if (c <= 0xff) printf("<%02x>", c);
+	else if (c <= 0xffff) printf("<%04x>", c);
+	else if (c <= 0xffffff) printf("<%06x>", c);
+	else printf("<%010x>", c);
+}
+
+int
+main(int argc, char **argv)
+{
+	fz_context *ctx;
+	fz_stream *fi;
+	pdf_cmap *cmap;
+	int k, m, n, i;
+	struct cidrange *r;
+
+	if (argc != 2)
+	{
+		fprintf(stderr, "usage: cmapclean input.cmap\n");
+		return 1;
+	}
+
+	ctx = fz_new_context(NULL, NULL, FZ_STORE_UNLIMITED);
+	if (!ctx)
+	{
+		fprintf(stderr, "cannot initialise context\n");
+		return 1;
+	}
+
+	fi = fz_open_file(ctx, argv[1]);
+	cmap = pdf_load_cmap(ctx, fi);
+	fz_close(fi);
+
+	printf("begincmap\n");
+	printf("/CMapName /%s def\n", cmap->cmap_name);
+	printf("/WMode %d def\n", cmap->wmode);
+	if (cmap->usecmap_name[0])
+		printf("/%s usecmap\n", cmap->usecmap_name);
+
+	if (cmap->codespace_len)
+	{
+		printf("begincodespacerange\n");
+		for (k = 0; k < cmap->codespace_len; k++)
+		{
+			if (cmap->codespace[k].n == 1)
+				printf("<%02x> <%02x>\n", cmap->codespace[k].low, cmap->codespace[k].high);
+			else if (cmap->codespace[k].n == 2)
+				printf("<%04x> <%04x>\n", cmap->codespace[k].low, cmap->codespace[k].high);
+			else if (cmap->codespace[k].n == 3)
+				printf("<%06x> <%06x>\n", cmap->codespace[k].low, cmap->codespace[k].high);
+			else if (cmap->codespace[k].n == 4)
+				printf("<%08x> <%08x>\n", cmap->codespace[k].low, cmap->codespace[k].high);
+			else
+				printf("<%x> <%x>\n", cmap->codespace[k].low, cmap->codespace[k].high);
+		}
+		printf("endcodespacerange\n");
+	}
+
+	n = cmap->rlen + cmap->xlen;
+	r = malloc(n * sizeof *r);
+	i = 0;
+
+	for (k = 0; k < cmap->rlen; k++) {
+		r[i].lo = cmap->ranges[k].low;
+		r[i].hi = cmap->ranges[k].high;
+		r[i].v = cmap->ranges[k].out;
+		++i;
+	}
+
+	for (k = 0; k < cmap->xlen; k++) {
+		r[i].lo = cmap->xranges[k].low;
+		r[i].hi = cmap->xranges[k].high;
+		r[i].v = cmap->xranges[k].out;
+		++i;
+	}
+
+	qsort(r, n, sizeof *r, cmpcidrange);
+
+	if (n)
+	{
+		printf("begincidchar\n");
+		for (i = 0; i < n; ++i)
+		{
+			for (k = r[i].lo, m = r[i].v; k <= r[i].hi; ++k, ++m)
+			{
+				pc(k);
+				printf("%u\n", m);
+			}
+		}
+		printf("endcidchar\n");
+	}
+
+	if (cmap->mlen > 0)
+	{
+		printf("beginbfchar\n");
+		for (k = 0; k < cmap->mlen; k++)
+		{
+			pc(cmap->mranges[k].low);
+
+			printf("<");
+			for (m = 0; m < cmap->mranges[k].len; ++m)
+				printf("%04x", cmap->mranges[k].out[m]);
+			printf(">\n");
+		}
+		printf("endbfchar\n");
+	}
+
+	printf("endcmap\n");
+
+	fz_free_context(ctx);
+	return 0;
+}
+
+void fz_new_font_context(fz_context *ctx)
+{
+}
+
+void fz_drop_font_context(fz_context *ctx)
+{
+}
+
+fz_font_context *fz_keep_font_context(fz_context *ctx)
+{
+	return NULL;
+}
+
+void fz_new_colorspace_context(fz_context *ctx)
+{
+}
+
+void fz_drop_colorspace_context(fz_context *ctx)
+{
+}
+
+fz_colorspace_context *fz_keep_colorspace_context(fz_context *ctx)
+{
+	return NULL;
+}
+
+void fz_new_aa_context(fz_context *ctx)
+{
+}
+
+void fz_free_aa_context(fz_context *ctx)
+{
+}
+
+void fz_copy_aa_context(fz_context *dst, fz_context *src)
+{
+}
+
+void *fz_keep_storable(fz_context *ctx, fz_storable *s)
+{
+	return s;
+}
+
+void fz_drop_storable(fz_context *ctx, fz_storable *s)
+{
+}
+
+void fz_new_store_context(fz_context *ctx, unsigned int max)
+{
+}
+
+void fz_drop_store_context(fz_context *ctx)
+{
+}
+
+fz_store *fz_keep_store_context(fz_context *ctx)
+{
+	return NULL;
+}
+
+int fz_store_scavenge(fz_context *ctx, unsigned int size, int *phase)
+{
+	return 0;
+}
+
+void fz_new_glyph_cache_context(fz_context *ctx)
+{
+}
+
+void fz_drop_glyph_cache_context(fz_context *ctx)
+{
+}
+
+fz_glyph_cache *fz_keep_glyph_cache(fz_context *ctx)
+{
+	return NULL;
+}
+
+void fz_new_document_handler_context(fz_context *ctx)
+{
+}
+
+void fz_drop_document_handler_context(fz_context *ctx)
+{
+}
+
+fz_document_handler_context *fz_keep_document_handler_context(fz_context *ctx)
+{
+	return NULL;
+}