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builtin-mv: readability patch

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The old version was not liked at all. This is hopefully better. Oh, and it
gets rid of the goto.

Note that it does not change any functionality.

Signed-off-by: Johannes Schindelin <Johannes.Schindelin@gmx.de>
Signed-off-by: Junio C Hamano <junkio@cox.net>
This commit is contained in:
Johannes Schindelin 2006-08-19 16:52:21 +02:00 committed by Junio C Hamano
parent 6e17886d37
commit 60a6bf5f53
1 changed files with 43 additions and 59 deletions
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96
builtin-mv.c
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@ -129,48 +129,43 @@ int cmd_mv(int argc, const char **argv, const char *prefix)
/* Checking */ /* Checking */
for (i = 0; i < count; i++) { for (i = 0; i < count; i++) {
int length; const char *src = source[i], *dst = destination[i];
int length, src_is_dir;
const char *bad = NULL; const char *bad = NULL;
if (show_only) if (show_only)
printf("Checking rename of '%s' to '%s'\n", printf("Checking rename of '%s' to '%s'\n", src, dst);
source[i], destination[i]);
if (lstat(source[i], &st) < 0) length = strlen(src);
if (lstat(src, &st) < 0)
bad = "bad source"; bad = "bad source";
else if (!strncmp(src, dst, length) &&
if (!bad && (dst[length] == 0 || dst[length] == '/')) {
(length = strlen(source[i])) >= 0 &&
!strncmp(destination[i], source[i], length) &&
(destination[i][length] == 0 || destination[i][length] == '/'))
bad = "can not move directory into itself"; bad = "can not move directory into itself";
} else if ((src_is_dir = S_ISDIR(st.st_mode))
if (S_ISDIR(st.st_mode)) { && lstat(dst, &st) == 0)
const char *dir = source[i], *dest_dir = destination[i];
int first, last, len = strlen(dir);
if (lstat(dest_dir, &st) == 0) {
bad = "cannot move directory over file"; bad = "cannot move directory over file";
goto next; else if (src_is_dir) {
} int first, last;
modes[i] = WORKING_DIRECTORY; modes[i] = WORKING_DIRECTORY;
first = cache_name_pos(source[i], len); first = cache_name_pos(src, length);
if (first >= 0) if (first >= 0)
die ("Huh? %s/ is in index?", dir); die ("Huh? %s/ is in index?", src);
first = -1 - first; first = -1 - first;
for (last = first; last < active_nr; last++) { for (last = first; last < active_nr; last++) {
const char *path = active_cache[last]->name; const char *path = active_cache[last]->name;
if (strncmp(path, dir, len) || path[len] != '/') if (strncmp(path, src, length)
|| path[length] != '/')
break; break;
} }
if (last - first < 1) if (last - first < 1)
bad = "source directory is empty"; bad = "source directory is empty";
else if (!bad) { else {
int j, dst_len = strlen(dest_dir); int j, dst_len;
if (last - first > 0) { if (last - first > 0) {
source = realloc(source, source = realloc(source,
@ -184,24 +179,21 @@ int cmd_mv(int argc, const char **argv, const char *prefix)
* sizeof(enum update_mode)); * sizeof(enum update_mode));
} }
dest_dir = add_slash(dest_dir); dst = add_slash(dst);
dst_len = strlen(dst) - 1;
for (j = 0; j < last - first; j++) { for (j = 0; j < last - first; j++) {
const char *path = const char *path =
active_cache[first + j]->name; active_cache[first + j]->name;
source[count + j] = path; source[count + j] = path;
destination[count + j] = destination[count + j] =
prefix_path(dest_dir, dst_len, prefix_path(dst, dst_len,
path + len); path + length);
modes[count + j] = INDEX; modes[count + j] = INDEX;
} }
count += last - first; count += last - first;
} }
} else if (lstat(dst, &st) == 0) {
goto next;
}
if (!bad && lstat(destination[i], &st) == 0) {
bad = "destination exists"; bad = "destination exists";
if (force) { if (force) {
/* /*
@ -213,24 +205,17 @@ int cmd_mv(int argc, const char **argv, const char *prefix)
" will overwrite!\n", " will overwrite!\n",
bad); bad);
bad = NULL; bad = NULL;
path_list_insert(destination[i], path_list_insert(dst, &overwritten);
&overwritten);
} else } else
bad = "Cannot overwrite"; bad = "Cannot overwrite";
} }
} } else if (cache_name_pos(src, length) < 0)
if (!bad && cache_name_pos(source[i], strlen(source[i])) < 0)
bad = "not under version control"; bad = "not under version control";
else if (path_list_has_path(&src_for_dst, dst))
if (!bad) {
if (path_list_has_path(&src_for_dst, destination[i]))
bad = "multiple sources for the same target"; bad = "multiple sources for the same target";
else else
path_list_insert(destination[i], &src_for_dst); path_list_insert(dst, &src_for_dst);
}
next:
if (bad) { if (bad) {
if (ignore_errors) { if (ignore_errors) {
if (--count > 0) { if (--count > 0) {
@ -242,33 +227,32 @@ int cmd_mv(int argc, const char **argv, const char *prefix)
} }
} else } else
die ("%s, source=%s, destination=%s", die ("%s, source=%s, destination=%s",
bad, source[i], destination[i]); bad, src, dst);
} }
} }
for (i = 0; i < count; i++) { for (i = 0; i < count; i++) {
const char *src = source[i], *dst = destination[i];
enum update_mode mode = modes[i];
if (show_only || verbose) if (show_only || verbose)
printf("Renaming %s to %s\n", printf("Renaming %s to %s\n", src, dst);
source[i], destination[i]); if (!show_only && mode != INDEX &&
if (!show_only && modes[i] != INDEX && rename(src, dst) < 0 && !ignore_errors)
rename(source[i], destination[i]) < 0 && die ("renaming %s failed: %s", src, strerror(errno));
!ignore_errors)
die ("renaming %s failed: %s",
source[i], strerror(errno));
if (modes[i] == WORKING_DIRECTORY) if (mode == WORKING_DIRECTORY)
continue; continue;
if (cache_name_pos(source[i], strlen(source[i])) >= 0) { if (cache_name_pos(src, strlen(src)) >= 0) {
path_list_insert(source[i], &deleted); path_list_insert(src, &deleted);
/* destination can be a directory with 1 file inside */ /* destination can be a directory with 1 file inside */
if (path_list_has_path(&overwritten, destination[i])) if (path_list_has_path(&overwritten, dst))
path_list_insert(destination[i], &changed); path_list_insert(dst, &changed);
else else
path_list_insert(destination[i], &added); path_list_insert(dst, &added);
} else } else
path_list_insert(destination[i], &added); path_list_insert(dst, &added);
} }
if (show_only) { if (show_only) {