pdf: Optimize storage for the Adobe Glyph List.

1 files changed, 83 insertions, 0 deletions

diff --git a/pdf/pdf_encoding.c b/pdf/pdf_encoding.c
new file mode 100644
index 00000000..9a42a1c1
--- /dev/null
+++ b/pdf/pdf_encoding.c
@@ -0,0 +1,83 @@
+#include "fitz.h"
+#include "mupdf.h"
+
+#include "data_encodings.h"
+#include "data_glyphlist.h"
+
+void
+pdf_load_encoding(char **estrings, char *encoding)
+{
+	char **bstrings = NULL;
+	int i;
+
+	if (!strcmp(encoding, "StandardEncoding"))
+		bstrings = (char**) pdf_standard;
+	if (!strcmp(encoding, "MacRomanEncoding"))
+		bstrings = (char**) pdf_mac_roman;
+	if (!strcmp(encoding, "MacExpertEncoding"))
+		bstrings = (char**) pdf_mac_expert;
+	if (!strcmp(encoding, "WinAnsiEncoding"))
+		bstrings = (char**) pdf_win_ansi;
+
+	if (bstrings)
+		for (i = 0; i < 256; i++)
+			estrings[i] = bstrings[i];
+}
+
+int
+pdf_lookup_agl(char *name)
+{
+	char buf[64];
+	char *p;
+	int l = 0;
+	int r = nelem(agl_name_list) - 1;
+
+	fz_strlcpy(buf, name, sizeof buf);
+
+	/* kill anything after first period and underscore */
+	p = strchr(buf, '.');
+	if (p) p[0] = 0;
+	p = strchr(buf, '_');
+	if (p) p[0] = 0;
+
+	while (l <= r)
+	{
+		int m = (l + r) >> 1;
+		int c = strcmp(buf, agl_name_list[m]);
+		if (c < 0)
+			r = m - 1;
+		else if (c > 0)
+			l = m + 1;
+		else
+			return agl_code_list[m];
+	}
+
+	if (strstr(buf, "uni") == buf)
+		return strtol(buf + 3, NULL, 16);
+	else if (strstr(buf, "u") == buf)
+		return strtol(buf + 1, NULL, 16);
+	else if (strstr(buf, "a") == buf && strlen(buf) >= 3)
+		return strtol(buf + 1, NULL, 10);
+
+	return 0;
+}
+
+static const char *empty_dup_list[] = { 0 };
+
+const char **
+pdf_lookup_agl_duplicates(int ucs)
+{
+	int l = 0;
+	int r = nelem(agl_dup_offsets) / 2 - 1;
+	while (l <= r)
+	{
+		int m = (l + r) >> 1;
+		if (ucs < agl_dup_offsets[m << 1])
+			r = m - 1;
+		else if (ucs > agl_dup_offsets[m << 1])
+			l = m + 1;
+		else
+			return agl_dup_names + agl_dup_offsets[(m << 1) + 1];
+	}
+	return empty_dup_list;
+}