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tag.c
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Junio C Hamano
gpg-interface: move parse_signature() to where it should be
Sep 15, 2014
d7c6766
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Sep 15, 2014
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#include "cache.h" #include "tag.h" #include "commit.h" #include "tree.h" #include "blob.h" const char *tag_type = "tag"; struct object *deref_tag(struct object *o, const char *warn, int warnlen) { while (o && o->type == OBJ_TAG) if (((struct tag *)o)->tagged) o = parse_object(((struct tag *)o)->tagged->sha1); else o = NULL; if (!o && warn) { if (!warnlen) warnlen = strlen(warn); error("missing object referenced by '%.*s'", warnlen, warn); } return o; } struct object *deref_tag_noverify(struct object *o) { while (o && o->type == OBJ_TAG) { o = parse_object(o->sha1); if (o && o->type == OBJ_TAG && ((struct tag *)o)->tagged) o = ((struct tag *)o)->tagged; else o = NULL; } return o; } struct tag *lookup_tag(const unsigned char *sha1) { struct object *obj = lookup_object(sha1); if (!obj) return create_object(sha1, alloc_tag_node()); return object_as_type(obj, OBJ_TAG, 0); } static unsigned long parse_tag_date(const char *buf, const char *tail) { const char *dateptr; while (buf < tail && *buf++ != '>') /* nada */; if (buf >= tail) return 0; dateptr = buf; while (buf < tail && *buf++ != '\n') /* nada */; if (buf >= tail) return 0; /* dateptr < buf && buf[-1] == '\n', so strtoul will stop at buf-1 */ return strtoul(dateptr, NULL, 10); } int parse_tag_buffer(struct tag *item, const void *data, unsigned long size) { unsigned char sha1[20]; char type[20]; const char *bufptr = data; const char *tail = bufptr + size; const char *nl; if (item->object.parsed) return 0; item->object.parsed = 1; if (size < 64) return -1; if (memcmp("object ", bufptr, 7) || get_sha1_hex(bufptr + 7, sha1) || bufptr[47] != '\n') return -1; bufptr += 48; /* "object " + sha1 + "\n" */ if (!starts_with(bufptr, "type ")) return -1; bufptr += 5; nl = memchr(bufptr, '\n', tail - bufptr); if (!nl || sizeof(type) <= (nl - bufptr)) return -1; strncpy(type, bufptr, nl - bufptr); type[nl - bufptr] = '\0'; bufptr = nl + 1; if (!strcmp(type, blob_type)) { item->tagged = &lookup_blob(sha1)->object; } else if (!strcmp(type, tree_type)) { item->tagged = &lookup_tree(sha1)->object; } else if (!strcmp(type, commit_type)) { item->tagged = &lookup_commit(sha1)->object; } else if (!strcmp(type, tag_type)) { item->tagged = &lookup_tag(sha1)->object; } else { error("Unknown type %s", type); item->tagged = NULL; } if (bufptr + 4 < tail && starts_with(bufptr, "tag ")) ; /* good */ else return -1; bufptr += 4; nl = memchr(bufptr, '\n', tail - bufptr); if (!nl) return -1; item->tag = xmemdupz(bufptr, nl - bufptr); bufptr = nl + 1; if (bufptr + 7 < tail && starts_with(bufptr, "tagger ")) item->date = parse_tag_date(bufptr, tail); else item->date = 0; return 0; } int parse_tag(struct tag *item) { enum object_type type; void *data; unsigned long size; int ret; if (item->object.parsed) return 0; data = read_sha1_file(item->object.sha1, &type, &size); if (!data) return error("Could not read %s", sha1_to_hex(item->object.sha1)); if (type != OBJ_TAG) { free(data); return error("Object %s not a tag", sha1_to_hex(item->object.sha1)); } ret = parse_tag_buffer(item, data, size); free(data); return ret; }
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