Revision 60d0526aaa5d29589420bfadd0623ec878c5edf3 authored by Junio C Hamano on 14 September 2005, 20:15:53 UTC, committed by Junio C Hamano on 15 September 2005, 19:46:32 UTC
The code did not catch the case where you removed an existing ref without changing anything else. We are not talking about hundreds of refs anyway, so remove that optimization. Signed-off-by: Junio C Hamano <junkio@cox.net>
1 parent 0f56479
tree.c
#include "tree.h"
#include "blob.h"
#include "commit.h"
#include "tag.h"
#include "cache.h"
#include <stdlib.h>
const char *tree_type = "tree";
static int read_one_entry(unsigned char *sha1, const char *base, int baselen, const char *pathname, unsigned mode, int stage)
{
int len = strlen(pathname);
unsigned int size = cache_entry_size(baselen + len);
struct cache_entry *ce = xmalloc(size);
memset(ce, 0, size);
ce->ce_mode = create_ce_mode(mode);
ce->ce_flags = create_ce_flags(baselen + len, stage);
memcpy(ce->name, base, baselen);
memcpy(ce->name + baselen, pathname, len+1);
memcpy(ce->sha1, sha1, 20);
return add_cache_entry(ce, ADD_CACHE_OK_TO_ADD|ADD_CACHE_SKIP_DFCHECK);
}
static int match_tree_entry(const char *base, int baselen, const char *path, unsigned int mode, const char **paths)
{
const char *match;
int pathlen;
if (!paths)
return 1;
pathlen = strlen(path);
while ((match = *paths++) != NULL) {
int matchlen = strlen(match);
if (baselen >= matchlen) {
/* If it doesn't match, move along... */
if (strncmp(base, match, matchlen))
continue;
/* The base is a subdirectory of a path which was specified. */
return 1;
}
/* Does the base match? */
if (strncmp(base, match, baselen))
continue;
match += baselen;
matchlen -= baselen;
if (pathlen > matchlen)
continue;
if (matchlen > pathlen) {
if (match[pathlen] != '/')
continue;
if (!S_ISDIR(mode))
continue;
}
if (strncmp(path, match, pathlen))
continue;
return 1;
}
return 0;
}
static int read_tree_recursive(void *buffer, unsigned long size,
const char *base, int baselen,
int stage, const char **match)
{
while (size) {
int len = strlen(buffer)+1;
unsigned char *sha1 = buffer + len;
char *path = strchr(buffer, ' ')+1;
unsigned int mode;
if (size < len + 20 || sscanf(buffer, "%o", &mode) != 1)
return -1;
buffer = sha1 + 20;
size -= len + 20;
if (!match_tree_entry(base, baselen, path, mode, match))
continue;
if (S_ISDIR(mode)) {
int retval;
int pathlen = strlen(path);
char *newbase;
void *eltbuf;
char elttype[20];
unsigned long eltsize;
eltbuf = read_sha1_file(sha1, elttype, &eltsize);
if (!eltbuf || strcmp(elttype, "tree")) {
if (eltbuf) free(eltbuf);
return -1;
}
newbase = xmalloc(baselen + 1 + pathlen);
memcpy(newbase, base, baselen);
memcpy(newbase + baselen, path, pathlen);
newbase[baselen + pathlen] = '/';
retval = read_tree_recursive(eltbuf, eltsize,
newbase,
baselen + pathlen + 1,
stage, match);
free(eltbuf);
free(newbase);
if (retval)
return -1;
continue;
}
if (read_one_entry(sha1, base, baselen, path, mode, stage) < 0)
return -1;
}
return 0;
}
int read_tree(void *buffer, unsigned long size, int stage, const char **match)
{
return read_tree_recursive(buffer, size, "", 0, stage, match);
}
struct tree *lookup_tree(const unsigned char *sha1)
{
struct object *obj = lookup_object(sha1);
if (!obj) {
struct tree *ret = xmalloc(sizeof(struct tree));
memset(ret, 0, sizeof(struct tree));
created_object(sha1, &ret->object);
ret->object.type = tree_type;
return ret;
}
if (!obj->type)
obj->type = tree_type;
if (obj->type != tree_type) {
error("Object %s is a %s, not a tree",
sha1_to_hex(sha1), obj->type);
return NULL;
}
return (struct tree *) obj;
}
int parse_tree_buffer(struct tree *item, void *buffer, unsigned long size)
{
void *bufptr = buffer;
struct tree_entry_list **list_p;
if (item->object.parsed)
return 0;
item->object.parsed = 1;
list_p = &item->entries;
while (size) {
struct object *obj;
struct tree_entry_list *entry;
int len = 1+strlen(bufptr);
unsigned char *file_sha1 = bufptr + len;
char *path = strchr(bufptr, ' ');
unsigned int mode;
if (size < len + 20 || !path ||
sscanf(bufptr, "%o", &mode) != 1)
return -1;
entry = xmalloc(sizeof(struct tree_entry_list));
entry->name = strdup(path + 1);
entry->directory = S_ISDIR(mode) != 0;
entry->executable = (mode & S_IXUSR) != 0;
entry->symlink = S_ISLNK(mode) != 0;
entry->zeropad = *(char *)bufptr == '0';
entry->mode = mode;
entry->next = NULL;
bufptr += len + 20;
size -= len + 20;
if (entry->directory) {
entry->item.tree = lookup_tree(file_sha1);
obj = &entry->item.tree->object;
} else {
entry->item.blob = lookup_blob(file_sha1);
obj = &entry->item.blob->object;
}
if (obj)
add_ref(&item->object, obj);
entry->parent = NULL; /* needs to be filled by the user */
*list_p = entry;
list_p = &entry->next;
}
return 0;
}
int parse_tree(struct tree *item)
{
char type[20];
void *buffer;
unsigned long size;
int ret;
if (item->object.parsed)
return 0;
buffer = 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, tree_type)) {
free(buffer);
return error("Object %s not a tree",
sha1_to_hex(item->object.sha1));
}
ret = parse_tree_buffer(item, buffer, size);
free(buffer);
return ret;
}
struct tree *parse_tree_indirect(const unsigned char *sha1)
{
struct object *obj = parse_object(sha1);
do {
if (!obj)
return NULL;
if (obj->type == tree_type)
return (struct tree *) obj;
else if (obj->type == commit_type)
obj = &(((struct commit *) obj)->tree->object);
else if (obj->type == tag_type)
obj = ((struct tag *) obj)->tagged;
else
return NULL;
if (!obj->parsed)
parse_object(obj->sha1);
} while (1);
}
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