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authorDaniel Barkalow <barkalow@iabervon.org>2005-04-18 18:39:48 (GMT)
committerLinus Torvalds <torvalds@ppc970.osdl.org>2005-04-18 18:39:48 (GMT)
commit175785e5ff7395be8a458694a7df0511ac14e948 (patch)
tree3e65cde9bb577457d62c11fc6075f3a04a8d4bc9 /commit.c
parent6eb8ae00d4bceaf660a07d8bc5ab8d6ddccbe1af (diff)
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[PATCH] Implementations of parsing functions
This implements the parsing functions. Signed-Off-By: Daniel Barkalow <barkalow@iabervon.org> Signed-off-by: Linus Torvalds <torvalds@osdl.org>
Diffstat (limited to 'commit.c')
-rw-r--r--commit.c85
1 files changed, 85 insertions, 0 deletions
diff --git a/commit.c b/commit.c
new file mode 100644
index 0000000..eda45d7
--- /dev/null
+++ b/commit.c
@@ -0,0 +1,85 @@
+#include "commit.h"
+#include "cache.h"
+#include <string.h>
+
+const char *commit_type = "commit";
+
+struct commit *lookup_commit(unsigned char *sha1)
+{
+ struct object *obj = lookup_object(sha1);
+ if (!obj) {
+ struct commit *ret = malloc(sizeof(struct commit));
+ memset(ret, 0, sizeof(struct commit));
+ created_object(sha1, &ret->object);
+ return ret;
+ }
+ if (obj->parsed && obj->type != commit_type) {
+ error("Object %s is a %s, not a commit",
+ sha1_to_hex(sha1), obj->type);
+ return NULL;
+ }
+ return (struct commit *) obj;
+}
+
+static unsigned long parse_commit_date(const char *buf)
+{
+ unsigned long date;
+
+ if (memcmp(buf, "author", 6))
+ return 0;
+ while (*buf++ != '\n')
+ /* nada */;
+ if (memcmp(buf, "committer", 9))
+ return 0;
+ while (*buf++ != '>')
+ /* nada */;
+ date = strtoul(buf, NULL, 10);
+ if (date == ULONG_MAX)
+ date = 0;
+ return date;
+}
+
+int parse_commit(struct commit *item)
+{
+ char type[20];
+ void * buffer, *bufptr;
+ unsigned long size;
+ unsigned char parent[20];
+ if (item->object.parsed)
+ return 0;
+ item->object.parsed = 1;
+ buffer = bufptr = read_sha1_file(item->object.sha1, type, &size);
+ if (!buffer)
+ return error("Could not read %s",
+ sha1_to_hex(item->object.sha1));
+ if (strcmp(type, commit_type))
+ return error("Object %s not a commit",
+ sha1_to_hex(item->object.sha1));
+ item->object.type = commit_type;
+ get_sha1_hex(bufptr + 5, parent);
+ item->tree = lookup_tree(parent);
+ add_ref(&item->object, &item->tree->object);
+ bufptr += 46; /* "tree " + "hex sha1" + "\n" */
+ while (!memcmp(bufptr, "parent ", 7) &&
+ !get_sha1_hex(bufptr + 7, parent)) {
+ struct commit_list *new_parent =
+ malloc(sizeof(struct commit_list));
+ new_parent->next = item->parents;
+ new_parent->item = lookup_commit(parent);
+ add_ref(&item->object, &new_parent->item->object);
+ item->parents = new_parent;
+ bufptr += 48;
+ }
+ item->date = parse_commit_date(bufptr);
+ free(buffer);
+ return 0;
+}
+
+void free_commit_list(struct commit_list *list)
+{
+ while (list) {
+ struct commit_list *temp = list;
+ list = temp->next;
+ free(temp);
+ }
+}