#include "tag.h" #include "cache.h" const char *tag_type = "tag"; struct tag *lookup_tag(unsigned char *sha1) { struct object *obj = lookup_object(sha1); if (!obj) { struct tag *ret = xmalloc(sizeof(struct tag)); memset(ret, 0, sizeof(struct tag)); created_object(sha1, &ret->object); ret->object.type = tag_type; return ret; } if (obj->type != tag_type) { error("Object %s is a %s, not a tree", sha1_to_hex(sha1), obj->type); return NULL; } return (struct tag *) obj; } int parse_tag(struct tag *item) { char type[20]; void *data, *bufptr; unsigned long size; int typelen, taglen; unsigned char object[20]; const char *type_line, *tag_line, *sig_line; if (item->object.parsed) return 0; item->object.parsed = 1; data = bufptr = read_sha1_file(item->object.sha1, type, &size); if (!data) return error("Could not read %s", sha1_to_hex(item->object.sha1)); if (strcmp(type, tag_type)) { free(data); return error("Object %s not a tag", sha1_to_hex(item->object.sha1)); } if (size < 64) goto err; if (memcmp("object ", data, 7) || get_sha1_hex(data + 7, object)) goto err; item->tagged = parse_object(object); type_line = data + 48; if (memcmp("\ntype ", type_line-1, 6)) goto err; tag_line = strchr(type_line, '\n'); if (!tag_line || memcmp("tag ", ++tag_line, 4)) goto err; sig_line = strchr(tag_line, '\n'); if (!sig_line) goto err; sig_line++; typelen = tag_line - type_line - strlen("type \n"); if (typelen >= 20) goto err; taglen = sig_line - tag_line - strlen("tag \n"); item->tag = xmalloc(taglen + 1); memcpy(item->tag, tag_line + 4, taglen); item->tag[taglen] = '\0'; free(data); return 0; err: free(data); return -1; }