summaryrefslogtreecommitdiffstats
path: root/t/helper/test-delta.c
diff options
context:
space:
mode:
Diffstat (limited to '')
-rw-r--r--t/helper/test-delta.c86
1 files changed, 86 insertions, 0 deletions
diff --git a/t/helper/test-delta.c b/t/helper/test-delta.c
new file mode 100644
index 0000000..b15481e
--- /dev/null
+++ b/t/helper/test-delta.c
@@ -0,0 +1,86 @@
+/*
+ * test-delta.c: test code to exercise diff-delta.c and patch-delta.c
+ *
+ * (C) 2005 Nicolas Pitre <nico@fluxnic.net>
+ *
+ * This code 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.
+ */
+
+#include "test-tool.h"
+#include "git-compat-util.h"
+#include "delta.h"
+#include "cache.h"
+
+static const char usage_str[] =
+ "test-tool delta (-d|-p) <from_file> <data_file> <out_file>";
+
+int cmd__delta(int argc, const char **argv)
+{
+ int fd;
+ struct stat st;
+ void *from_buf = NULL, *data_buf = NULL, *out_buf = NULL;
+ unsigned long from_size, data_size, out_size;
+ int ret = 1;
+
+ if (argc != 5 || (strcmp(argv[1], "-d") && strcmp(argv[1], "-p"))) {
+ fprintf(stderr, "usage: %s\n", usage_str);
+ return 1;
+ }
+
+ fd = open(argv[2], O_RDONLY);
+ if (fd < 0 || fstat(fd, &st)) {
+ perror(argv[2]);
+ return 1;
+ }
+ from_size = st.st_size;
+ from_buf = xmalloc(from_size);
+ if (read_in_full(fd, from_buf, from_size) < 0) {
+ perror(argv[2]);
+ close(fd);
+ goto cleanup;
+ }
+ close(fd);
+
+ fd = open(argv[3], O_RDONLY);
+ if (fd < 0 || fstat(fd, &st)) {
+ perror(argv[3]);
+ goto cleanup;
+ }
+ data_size = st.st_size;
+ data_buf = xmalloc(data_size);
+ if (read_in_full(fd, data_buf, data_size) < 0) {
+ perror(argv[3]);
+ close(fd);
+ goto cleanup;
+ }
+ close(fd);
+
+ if (argv[1][1] == 'd')
+ out_buf = diff_delta(from_buf, from_size,
+ data_buf, data_size,
+ &out_size, 0);
+ else
+ out_buf = patch_delta(from_buf, from_size,
+ data_buf, data_size,
+ &out_size);
+ if (!out_buf) {
+ fprintf(stderr, "delta operation failed (returned NULL)\n");
+ goto cleanup;
+ }
+
+ fd = open (argv[4], O_WRONLY|O_CREAT|O_TRUNC, 0666);
+ if (fd < 0 || write_in_full(fd, out_buf, out_size) < 0) {
+ perror(argv[4]);
+ goto cleanup;
+ }
+
+ ret = 0;
+cleanup:
+ free(from_buf);
+ free(data_buf);
+ free(out_buf);
+
+ return ret;
+}