added 3dengfx into the repo, probably not the correct version for this

[summerhack] / src / 3dengfx / src / common / byteorder.c

diff --git a/src/3dengfx/src/common/byteorder.c b/src/3dengfx/src/common/byteorder.c
new file mode 100644 (file)
index 0000000..4beb68d
--- /dev/null
+++ b/src/3dengfx/src/common/byteorder.c
@@ -0,0 +1,89 @@
+/*
+Copyright (C) 2005 John Tsiombikas <nuclear@siggraph.org>
+
+This program is free software; you can redistribute it and/or modify
+it under the terms of the GNU General Public License as published by
+the Free Software Foundation; either version 2 of the License, or
+(at your option) any later version.
+
+This program is distributed in the hope that it will be useful,
+but WITHOUT ANY WARRANTY; without even the implied warranty of
+MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+GNU General Public License for more details.
+
+You should have received a copy of the GNU General Public License
+along with this program; if not, write to the Free Software
+Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
+*/
+
+#include <stdio.h>
+#include "byteorder.h"
+
+int8_t read_int8(FILE *fp) {
+       int8_t v;
+       fread(&v, 1, 1, fp);
+       return v;
+}
+
+int16_t read_int16(FILE *fp) {
+       int16_t v;
+       fread(&v, 2, 1, fp);
+       return v;
+}
+
+int16_t read_int16_inv(FILE *fp) {
+       int16_t v;
+       fread(&v, 2, 1, fp);
+       return v >> 8 | v << 8;
+}
+
+int32_t read_int32(FILE *fp) {
+       int32_t v;
+       fread(&v, 4, 1, fp);
+       return v;
+}
+
+int32_t read_int32_inv(FILE *fp) {
+       int32_t v;
+       fread(&v, 4, 1, fp);
+       return v >> 24 | (v & 0x00ff0000) >> 8 | (v & 0x0000ff00) << 8 | v << 24;
+}
+
+float read_float(FILE *fp) {
+       int32_t tmp = read_int32(fp);
+       return *((float*)&tmp);
+}
+
+float read_float_inv(FILE *fp) {
+       int32_t tmp = read_int32_inv(fp);
+       return *((float*)&tmp);
+}
+
+void write_int8(FILE *fp, int8_t v) {
+       fwrite(&v, 1, 1, fp);
+}
+
+void write_int16(FILE *fp, int16_t v) {
+       fwrite(&v, 2, 1, fp);
+}
+
+void write_int16_inv(FILE *fp, int16_t v) {
+       int16_t tmp = v >> 8 | v << 8;
+       fwrite(&tmp, 2, 1, fp);
+}
+
+void write_int32(FILE *fp, int32_t v) {
+       fwrite(&v, 4, 1, fp);
+}
+
+void write_int32_inv(FILE *fp, int32_t v) {
+       int32_t tmp = v >> 24 | (v & 0x00ff0000) >> 8 | (v & 0x0000ff00) << 8 | v << 24;
+       fwrite(&tmp, 4, 1, fp);
+}
+
+void write_float(FILE *fp, float v) {
+       write_int32(fp, *((int32_t*)&v));
+}
+void write_float_inv(FILE *fp, float v) {
+       write_int32_inv(fp, *((int32_t*)&v));
+}