1 files changed, 166 insertions, 0 deletions
diff --git a/tbdiff/tbdiff-io.c b/tbdiff/tbdiff-io.c
new file mode 100644
index 0000000..698273b
--- /dev/null
+++ b/tbdiff/tbdiff-io.c
@@ -0,0 +1,166 @@
+/*
+ *    Copyright (C) 2011-2012 Codethink Ltd.
+ *
+ *    This program is free software; you can redistribute it and/or modify
+ *    it under the terms of the GNU General Public License Version 2 as
+ *    published by the Free Software Foundation.
+ *
+ *    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.,
+ *    51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
+ */
+
+#include <endian.h>
+#include <unistd.h>
+#include <assert.h>
+
+#include <tbdiff/tbdiff-stat.h>
+
+#if __BYTE_ORDER == __BIG_ENDIAN
+//inverts the indices of an array of bytes.
+static void byteswap (char* value, int size) {
+    char tmp;
+    int i;
+    for (i = 0; i < size/2; i++) {
+        tmp = value[i];
+        value[i] = value[size-i-1];
+        value[size-i-1] = tmp;
+    }   
+}
+#endif
+
+size_t tbd_write_uint16_t (uint16_t value, FILE* stream) {
+#if __BYTE_ORDER == __BIG_ENDIAN
+        byteswap((char*)&value, sizeof(value));
+#endif
+    return fwrite(&value, sizeof(value), 1, stream);
+}
+
+size_t tbd_write_uint32_t (uint32_t value, FILE* stream) {
+#if __BYTE_ORDER == __BIG_ENDIAN
+        byteswap((char*)&value, sizeof(value));
+#endif
+    return fwrite(&value, sizeof(value), 1, stream);
+}
+
+size_t tbd_write_uint64_t (uint64_t value, FILE* stream) {
+#if __BYTE_ORDER == __BIG_ENDIAN
+        byteswap((char*)&value, sizeof(value));
+#endif
+    return fwrite(&value, sizeof(value), 1, stream);
+}
+
+size_t tbd_write_time_t (time_t value, FILE* stream) {
+    uint64_t realv = value;
+#if __BYTE_ORDER == __BIG_ENDIAN
+        byteswap((char*)&realv, sizeof(realv));
+#endif
+    return fwrite(&realv, sizeof(realv), 1, stream);
+}
+
+size_t tbd_write_mode_t (mode_t value, FILE* stream) {
+#if __BYTE_ORDER == __BIG_ENDIAN
+        byteswap((char*)&value, sizeof(value));
+#endif
+    return fwrite(&value, sizeof(value), 1, stream);
+}
+
+size_t tbd_write_uid_t (uid_t value, FILE* stream) {
+#if __BYTE_ORDER == __BIG_ENDIAN
+        byteswap((char*)&value, sizeof(value));
+#endif
+    return fwrite(&value, sizeof(value), 1, stream);
+}
+
+size_t tbd_write_gid_t (gid_t value, FILE* stream) {
+#if __BYTE_ORDER == __BIG_ENDIAN
+        byteswap((char*)&value, sizeof(value));
+#endif
+    return fwrite(&value, sizeof(value), 1, stream);
+}
+
+size_t tbd_write_size_t (size_t value, FILE* stream) {
+#if __BYTE_ORDER == __BIG_ENDIAN
+        byteswap((char*)&value, sizeof(value));
+#endif
+    return fwrite(&value, sizeof(value), 1, stream);
+}
+
+size_t tbd_read_uint16_t (uint16_t *value, FILE* stream) {
+    assert(value != NULL);
+    size_t rval = fread(value, sizeof(*value), 1, stream);
+#if __BYTE_ORDER == __BIG_ENDIAN
+        byteswap((char*)value, sizeof(*value));
+#endif
+    return rval;
+}
+
+size_t tbd_read_uint32_t (uint32_t *value, FILE* stream) {
+    assert(value != NULL);
+    size_t rval = fread(value, sizeof(*value), 1, stream);
+#if __BYTE_ORDER == __BIG_ENDIAN
+        byteswap((char*)value, sizeof(*value));
+#endif
+    return rval;
+}
+
+size_t tbd_read_uint64_t (uint64_t *value, FILE* stream) {
+    assert(value != NULL);
+    size_t rval = fread(value, sizeof(*value), 1, stream);
+#if __BYTE_ORDER == __BIG_ENDIAN
+        byteswap((char*)value, sizeof(*value));
+#endif
+    return rval;
+}
+
+size_t tbd_read_time_t (time_t *value, FILE* stream) {
+    assert(value != NULL);
+    uint64_t realv;
+    size_t rval = fread(&realv, sizeof(realv), 1, stream);
+#if __BYTE_ORDER == __BIG_ENDIAN
+        byteswap((char*)&realv, sizeof(realv));        
+#endif
+    *value = realv;
+    return rval;
+    }
+
+size_t tbd_read_mode_t (mode_t *value, FILE* stream) {
+    assert(value != NULL);
+    size_t rval = fread(value, sizeof(*value), 1, stream);
+#if __BYTE_ORDER == __BIG_ENDIAN
+        byteswap((char*)value, sizeof(*value));
+#endif
+    return rval;
+    }
+
+size_t tbd_read_uid_t (uid_t *value, FILE* stream) {
+    assert(value != NULL);
+    size_t rval = fread(value, sizeof(*value), 1, stream);
+#if __BYTE_ORDER == __BIG_ENDIAN
+        byteswap((char*)value, sizeof(*value));
+#endif
+    return rval;
+    }
+
+size_t tbd_read_gid_t (gid_t *value, FILE* stream) {
+    assert(value != NULL);
+    size_t rval = fread(value, sizeof(*value), 1, stream);
+#if __BYTE_ORDER == __BIG_ENDIAN
+        byteswap((char*)value, sizeof(*value));
+#endif
+    return rval;
+    }
+
+size_t tbd_read_size_t (size_t *value, FILE* stream) {
+    assert(value != NULL);
+    size_t rval = fread(value, sizeof(*value), 1, stream);
+#if __BYTE_ORDER == __BIG_ENDIAN
+        byteswap((char*)value, sizeof(*value));
+#endif
+    return rval;
+    }