-#include <ctype.h>
-
-static char *diff_cmd = "diff -L '%s' -u -N - '%s'";
-
-/* Help to copy the thing properly quoted for the shell safety.
- * any single quote is replaced with '\'', and the caller is
- * expected to enclose the result within a single quote pair.
- *
- * E.g.
- * original sq_expand result
- * name ==> name ==> 'name'
- * a b ==> a b ==> 'a b'
- * a'b ==> a'\''b ==> 'a'\''b'
- *
- * NOTE! The returned memory belongs to this function so
- * do not free it.
- */
-static char *sq_expand(char *src)
-{
- static char *buf = NULL;
- static int buf_size = -1;
- int cnt, c;
- char *cp;
-
- /* count single quote characters */
- for (cnt = 0, cp = src; *cp; cnt++, cp++)
- if (*cp == '\'')
- cnt += 3;
-
- if (buf_size < cnt) {
- free(buf);
- buf_size = cnt;
- buf = malloc(cnt);
- }
-
- cp = buf;
- while ((c = *src++)) {
- if (c != '\'')
- *cp++ = c;
- else {
- cp = strcpy(cp, "'\\''");
- cp += 4;
- }
- }
- *cp = 0;
- return buf;
-}
-
-static void show_differences(char *name, void *old_contents,
- unsigned long long old_size)
-{
- FILE *f;
- static char *cmd = NULL;
- static int cmd_size = -1;
-
- char *name_sq = sq_expand(name);
- int cmd_required_length = strlen(name_sq) * 2 + strlen(diff_cmd);
-
- if (cmd_size < cmd_required_length) {
- free(cmd);
- cmd_size = cmd_required_length;
- cmd = malloc(cmd_required_length);
- }
- snprintf(cmd, cmd_size, diff_cmd, name_sq, name_sq);
- f = popen(cmd, "w");
- if (old_size)
- fwrite(old_contents, old_size, 1, f);
- pclose(f);
-}
-
-static void show_diff_empty(struct cache_entry *ce)
-{
- char *old;
- unsigned long int size;
- int lines=0;
- unsigned char type[20], *p, *end;
-
- old = read_sha1_file(ce->sha1, type, &size);
- if (size > 0) {
- int startline = 1;
- int c = 0;
-
- printf("--- %s\n", ce->name);
- printf("+++ /dev/null\n");
- p = old;
- end = old + size;
- while (p < end)
- if (*p++ == '\n')
- lines ++;
- printf("@@ -1,%d +0,0 @@\n", lines);
- p = old;
- while (p < end) {
- c = *p++;
- if (startline) {
- putchar('-');
- startline = 0;
- }
- putchar(c);
- if (c == '\n')
- startline = 1;
- }
- if (c!='\n')
- printf("\n");
- fflush(stdout);
- }
-}