e6dfcd6767
It is not a good idea to strbuf_attach an arbitrary pointer
just because a function you are calling wants a strbuf.
Attaching implies a transfer of memory ownership; if anyone
were to modify or release the resulting strbuf, we would
free() the pointer, leading to possible problems:
1. Other users of the original pointer might access freed
memory.
2. The pointer might not be the start of a malloc'd
area, so calling free() on it in the first place would
be wrong.
In the two cases modified here, we are fortunate that nobody
touches the strbuf once it is attached, but it is an
accident waiting to happen. Since the previous commit,
commit_tree and friends take a pointer/buf pair, so we can
just do away with the strbufs entirely.
Signed-off-by: Jeff King <peff@peff.net>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
95 lines
2.1 KiB
C
95 lines
2.1 KiB
C
#include "cache.h"
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#include "notes-cache.h"
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#include "commit.h"
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#include "refs.h"
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static int notes_cache_match_validity(const char *ref, const char *validity)
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{
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unsigned char sha1[20];
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struct commit *commit;
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struct pretty_print_context pretty_ctx;
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struct strbuf msg = STRBUF_INIT;
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int ret;
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if (read_ref(ref, sha1) < 0)
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return 0;
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commit = lookup_commit_reference_gently(sha1, 1);
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if (!commit)
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return 0;
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memset(&pretty_ctx, 0, sizeof(pretty_ctx));
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format_commit_message(commit, "%s", &msg, &pretty_ctx);
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strbuf_trim(&msg);
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ret = !strcmp(msg.buf, validity);
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strbuf_release(&msg);
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return ret;
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}
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void notes_cache_init(struct notes_cache *c, const char *name,
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const char *validity)
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{
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struct strbuf ref = STRBUF_INIT;
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int flags = 0;
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memset(c, 0, sizeof(*c));
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c->validity = xstrdup(validity);
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strbuf_addf(&ref, "refs/notes/%s", name);
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if (!notes_cache_match_validity(ref.buf, validity))
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flags = NOTES_INIT_EMPTY;
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init_notes(&c->tree, ref.buf, combine_notes_overwrite, flags);
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strbuf_release(&ref);
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}
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int notes_cache_write(struct notes_cache *c)
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{
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unsigned char tree_sha1[20];
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unsigned char commit_sha1[20];
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if (!c || !c->tree.initialized || !c->tree.ref || !*c->tree.ref)
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return -1;
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if (!c->tree.dirty)
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return 0;
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if (write_notes_tree(&c->tree, tree_sha1))
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return -1;
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if (commit_tree(c->validity, strlen(c->validity), tree_sha1, NULL,
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commit_sha1, NULL, NULL) < 0)
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return -1;
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if (update_ref("update notes cache", c->tree.ref, commit_sha1, NULL,
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0, QUIET_ON_ERR) < 0)
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return -1;
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return 0;
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}
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char *notes_cache_get(struct notes_cache *c, unsigned char key_sha1[20],
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size_t *outsize)
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{
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const unsigned char *value_sha1;
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enum object_type type;
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char *value;
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unsigned long size;
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value_sha1 = get_note(&c->tree, key_sha1);
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if (!value_sha1)
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return NULL;
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value = read_sha1_file(value_sha1, &type, &size);
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*outsize = size;
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return value;
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}
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int notes_cache_put(struct notes_cache *c, unsigned char key_sha1[20],
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const char *data, size_t size)
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{
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unsigned char value_sha1[20];
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if (write_sha1_file(data, size, "blob", value_sha1) < 0)
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return -1;
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return add_note(&c->tree, key_sha1, value_sha1, NULL);
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}
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