From 638384c10ff1b7b1233bec1d62db3e82cffeaafc Mon Sep 17 00:00:00 2001
From: Tor Andersson <tor.andersson@artifex.com>
Date: Mon, 19 Jun 2017 13:42:40 +0200
Subject: Add '-s' option to hexdump script to dump arrays using string
 literals.

If the compiler supports string literals long enough, this will speed up
compilation and reduce compiler memory use by a lot. Enough so that we don't
need to use the .incbin asm directive.

Gcc and Clang both support long string literals, so use the '-s' option for
generated font files by default in the Makefile.
---
 scripts/hexdump.c | 71 +++++++++++++++++++++++++------------------------------
 1 file changed, 32 insertions(+), 39 deletions(-)

(limited to 'scripts')

diff --git a/scripts/hexdump.c b/scripts/hexdump.c
index c75e97bc..18f6ac15 100644
--- a/scripts/hexdump.c
+++ b/scripts/hexdump.c
@@ -4,23 +4,31 @@
 #include <stdlib.h>
 #include <string.h>
 
+static int zero, string;
+
 static int
 hexdump(FILE *fo, FILE *fi)
 {
 	int c, n;
 
+	if (string)
+		fprintf(fo, "\"");
+
 	n = 0;
 	c = fgetc(fi);
 	while (c != -1)
 	{
-		n += fprintf(fo, "%d,", c);
+		n += fprintf(fo, string ? "\\x%02x" : "%d,", c);
 		if (n > 72) {
-			fprintf(fo, "\n");
+			fprintf(fo, string ? "\"\n\"" : "\n");
 			n = 0;
 		}
 		c = fgetc(fi);
 	}
 
+	if (string)
+		fprintf(fo, "\"\n");
+
 	return n;
 }
 
@@ -32,38 +40,36 @@ main(int argc, char **argv)
 	char filename[256];
 	char *basename;
 	char *p;
-	int i, size;
-	int zero;
+	int i, optind, size;
 
 	if (argc < 3)
 	{
-		fprintf(stderr, "usage: hexdump [-0] output.c input.dat\n");
+		fprintf(stderr, "usage: hexdump [-0] [-s] output.c input.dat\n");
 		return 1;
 	}
 
 	zero = 0;
-	if (!strcmp(argv[1], "-0"))
+	string = 0;
+	optind = 1;
+
+	if (!strcmp(argv[optind], "-0")) {
+		++optind;
 		zero = 1;
+	}
 
-	fo = fopen(argv[zero+1], "wb");
-	if (!fo)
-	{
-		fprintf(stderr, "hexdump: could not open output file '%s'\n", argv[zero+1]);
-		return 1;
+	if (!strcmp(argv[optind], "-s")) {
+		++optind;
+		string = 1;
 	}
 
-	if (!zero)
+	fo = fopen(argv[optind], "wb");
+	if (!fo)
 	{
-		fprintf(fo, "#ifndef __STRICT_ANSI__\n");
-		fprintf(fo, "#if defined(__linux__) || defined(__FreeBSD__) || defined(__OpenBSD__)\n");
-		fprintf(fo, "#if !defined(__ICC) && !defined(__ANDROID__)\n");
-		fprintf(fo, "#define HAVE_INCBIN\n");
-		fprintf(fo, "#endif\n");
-		fprintf(fo, "#endif\n");
-		fprintf(fo, "#endif\n");
+		fprintf(stderr, "hexdump: could not open output file '%s'\n", argv[optind]);
+		return 1;
 	}
 
-	for (i = zero+2; i < argc; i++)
+	for (i = optind+1; i < argc; i++)
 	{
 		fi = fopen(argv[i], "rb");
 		if (!fi)
@@ -100,31 +106,18 @@ main(int argc, char **argv)
 		size = ftell(fi);
 		fseek(fi, 0, SEEK_SET);
 
-		if (!zero)
-		{
-			fprintf(fo, "\n#ifdef HAVE_INCBIN\n");
-			fprintf(fo, "const int fz_%s_size = %d;\n", filename, size);
-			fprintf(fo, "extern const char fz_%s[];\n", filename);
-			fprintf(fo, "asm(\".section .rodata\");\n");
-			fprintf(fo, "asm(\".global fz_%s\");\n", filename);
-			fprintf(fo, "asm(\".type fz_%s STT_OBJECT\");\n", filename);
-			fprintf(fo, "asm(\".size fz_%s, %d\");\n", filename, size);
-			fprintf(fo, "asm(\".balign 64\");\n");
-			fprintf(fo, "asm(\"fz_%s:\");\n", filename);
-			fprintf(fo, "asm(\".incbin \\\"%s\\\"\");\n", argv[i]);
-			fprintf(fo, "#else\n");
-		}
-		fprintf(fo, "const int fz_%s_size = %d;\n", filename, size);
-		fprintf(fo, "const char fz_%s[] = {\n", filename);
+		fprintf(fo, "const int fz_%s_size = %d;\n", filename, size + zero);
+		fprintf(fo, "const char fz_%s[] =", filename);
+		fprintf(fo, string ? "\n" : " {\n");
 		hexdump(fo, fi);
 		if (!zero)
 		{
-			fprintf(fo, "};\n");
-			fprintf(fo, "#endif\n");
+			fprintf(fo, string ? ";\n" : "};\n");
 		}
 		else
 		{
-			fprintf(fo, "0};\n"); /* zero-terminate so we can hexdump text files into C strings */
+			/* zero-terminate so we can hexdump text files into C strings */
+			fprintf(fo, string ? ";\n" : "0};\n");
 		}
 
 		fclose(fi);
-- 
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