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