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https://github.com/git/git
synced 2024-10-30 13:20:15 +00:00
cc44c7655f
This mechanically converts strncmp() to use prefixcmp(), but only when
the parameters match specific patterns, so that they can be verified
easily. Leftover from this will be fixed in a separate step, including
idiotic conversions like
if (!strncmp("foo", arg, 3))
=>
if (!(-prefixcmp(arg, "foo")))
This was done by using this script in px.perl
#!/usr/bin/perl -i.bak -p
if (/strncmp\(([^,]+), "([^\\"]*)", (\d+)\)/ && (length($2) == $3)) {
s|strncmp\(([^,]+), "([^\\"]*)", (\d+)\)|prefixcmp($1, "$2")|;
}
if (/strncmp\("([^\\"]*)", ([^,]+), (\d+)\)/ && (length($1) == $3)) {
s|strncmp\("([^\\"]*)", ([^,]+), (\d+)\)|(-prefixcmp($2, "$1"))|;
}
and running:
$ git grep -l strncmp -- '*.c' | xargs perl px.perl
Signed-off-by: Junio C Hamano <junkio@cox.net>
87 lines
2.1 KiB
C
87 lines
2.1 KiB
C
/*
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* GIT - The information manager from hell
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*
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* Copyright (C) Linus Torvalds, 2005
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*/
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#include "builtin.h"
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#include "cache.h"
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#include "tree.h"
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#include "cache-tree.h"
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static const char write_tree_usage[] =
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"git-write-tree [--missing-ok] [--prefix=<prefix>/]";
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int write_tree(unsigned char *sha1, int missing_ok, const char *prefix)
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{
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int entries, was_valid, newfd;
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/* We can't free this memory, it becomes part of a linked list parsed atexit() */
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struct lock_file *lock_file = xcalloc(1, sizeof(struct lock_file));
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newfd = hold_lock_file_for_update(lock_file, get_index_file(), 0);
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entries = read_cache();
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if (entries < 0)
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die("git-write-tree: error reading cache");
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if (!active_cache_tree)
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active_cache_tree = cache_tree();
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was_valid = cache_tree_fully_valid(active_cache_tree);
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if (!was_valid) {
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if (cache_tree_update(active_cache_tree,
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active_cache, active_nr,
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missing_ok, 0) < 0)
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die("git-write-tree: error building trees");
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if (0 <= newfd) {
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if (!write_cache(newfd, active_cache, active_nr)
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&& !close(newfd))
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commit_lock_file(lock_file);
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}
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/* Not being able to write is fine -- we are only interested
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* in updating the cache-tree part, and if the next caller
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* ends up using the old index with unupdated cache-tree part
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* it misses the work we did here, but that is just a
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* performance penalty and not a big deal.
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*/
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}
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if (prefix) {
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struct cache_tree *subtree =
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cache_tree_find(active_cache_tree, prefix);
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hashcpy(sha1, subtree->sha1);
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}
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else
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hashcpy(sha1, active_cache_tree->sha1);
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rollback_lock_file(lock_file);
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return 0;
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}
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int cmd_write_tree(int argc, const char **argv, const char *unused_prefix)
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{
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int missing_ok = 0, ret;
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const char *prefix = NULL;
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unsigned char sha1[20];
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while (1 < argc) {
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const char *arg = argv[1];
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if (!strcmp(arg, "--missing-ok"))
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missing_ok = 1;
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else if (!prefixcmp(arg, "--prefix="))
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prefix = arg + 9;
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else
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usage(write_tree_usage);
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argc--; argv++;
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}
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if (argc > 2)
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die("too many options");
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ret = write_tree(sha1, missing_ok, prefix);
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printf("%s\n", sha1_to_hex(sha1));
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return ret;
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}
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