From 43134fcb350fb70d26634be163db1f71c14db19f Mon Sep 17 00:00:00 2001 From: Johannes Schindelin Date: Sat, 19 Aug 2006 16:52:21 +0200 Subject: [PATCH] builtin-mv: readability patch 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 Signed-off-by: Junio C Hamano --- builtin-mv.c | 102 ++++++++++++++++++++++----------------------------- 1 file changed, 43 insertions(+), 59 deletions(-) diff --git a/builtin-mv.c b/builtin-mv.c index c0c8764f7f..1fdb0c77f6 100644 --- a/builtin-mv.c +++ b/builtin-mv.c @@ -126,48 +126,43 @@ int cmd_mv(int argc, const char **argv, const char *prefix) /* Checking */ 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; if (show_only) - printf("Checking rename of '%s' to '%s'\n", - source[i], destination[i]); + printf("Checking rename of '%s' to '%s'\n", src, dst); - if (lstat(source[i], &st) < 0) + length = strlen(src); + if (lstat(src, &st) < 0) bad = "bad source"; - - if (!bad && - (length = strlen(source[i])) >= 0 && - !strncmp(destination[i], source[i], length) && - (destination[i][length] == 0 || destination[i][length] == '/')) + else if (!strncmp(src, dst, length) && + (dst[length] == 0 || dst[length] == '/')) { bad = "can not move directory into itself"; - - if (S_ISDIR(st.st_mode)) { - 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"; - goto next; - } + } else if ((src_is_dir = S_ISDIR(st.st_mode)) + && lstat(dst, &st) == 0) + bad = "cannot move directory over file"; + else if (src_is_dir) { + int first, last; modes[i] = WORKING_DIRECTORY; - first = cache_name_pos(source[i], len); + first = cache_name_pos(src, length); if (first >= 0) - die ("Huh? %s/ is in index?", dir); + die ("Huh? %s/ is in index?", src); first = -1 - first; for (last = first; last < active_nr; last++) { const char *path = active_cache[last]->name; - if (strncmp(path, dir, len) || path[len] != '/') + if (strncmp(path, src, length) + || path[length] != '/') break; } if (last - first < 1) bad = "source directory is empty"; - else if (!bad) { - int j, dst_len = strlen(dest_dir); + else { + int j, dst_len; if (last - first > 0) { source = realloc(source, @@ -181,24 +176,21 @@ int cmd_mv(int argc, const char **argv, const char *prefix) * 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++) { const char *path = active_cache[first + j]->name; source[count + j] = path; destination[count + j] = - prefix_path(dest_dir, dst_len, - path + len); + prefix_path(dst, dst_len, + path + length); modes[count + j] = INDEX; } count += last - first; } - - goto next; - } - - if (!bad && lstat(destination[i], &st) == 0) { + } else if (lstat(dst, &st) == 0) { bad = "destination exists"; if (force) { /* @@ -210,24 +202,17 @@ int cmd_mv(int argc, const char **argv, const char *prefix) " will overwrite!\n", bad); bad = NULL; - path_list_insert(destination[i], - &overwritten); + path_list_insert(dst, &overwritten); } else bad = "Cannot overwrite"; } - } - - if (!bad && cache_name_pos(source[i], strlen(source[i])) < 0) + } else if (cache_name_pos(src, length) < 0) bad = "not under version control"; + else if (path_list_has_path(&src_for_dst, dst)) + bad = "multiple sources for the same target"; + else + path_list_insert(dst, &src_for_dst); - if (!bad) { - if (path_list_has_path(&src_for_dst, destination[i])) - bad = "multiple sources for the same target"; - else - path_list_insert(destination[i], &src_for_dst); - } - -next: if (bad) { if (ignore_errors) { if (--count > 0) { @@ -239,33 +224,32 @@ int cmd_mv(int argc, const char **argv, const char *prefix) } } else die ("%s, source=%s, destination=%s", - bad, source[i], destination[i]); + bad, src, dst); } } for (i = 0; i < count; i++) { + const char *src = source[i], *dst = destination[i]; + enum update_mode mode = modes[i]; if (show_only || verbose) - printf("Renaming %s to %s\n", - source[i], destination[i]); - if (!show_only && modes[i] != INDEX && - rename(source[i], destination[i]) < 0 && - !ignore_errors) - die ("renaming %s failed: %s", - source[i], strerror(errno)); + printf("Renaming %s to %s\n", src, dst); + if (!show_only && mode != INDEX && + rename(src, dst) < 0 && !ignore_errors) + die ("renaming %s failed: %s", src, strerror(errno)); - if (modes[i] == WORKING_DIRECTORY) + if (mode == WORKING_DIRECTORY) continue; - if (cache_name_pos(source[i], strlen(source[i])) >= 0) { - path_list_insert(source[i], &deleted); + if (cache_name_pos(src, strlen(src)) >= 0) { + path_list_insert(src, &deleted); /* destination can be a directory with 1 file inside */ - if (path_list_has_path(&overwritten, destination[i])) - path_list_insert(destination[i], &changed); + if (path_list_has_path(&overwritten, dst)) + path_list_insert(dst, &changed); else - path_list_insert(destination[i], &added); + path_list_insert(dst, &added); } else - path_list_insert(destination[i], &added); + path_list_insert(dst, &added); } if (show_only) {