mirror of
https://github.com/git/git.git
synced 2024-11-18 06:03:53 +01:00
8e44025925
This replaces occurences of "blob", "commit", "tag", and "tree", where they're really used as type specifiers, which we already have defined global constants for. Signed-off-by: Peter Eriksen <s022018@student.dtu.dk> Signed-off-by: Junio C Hamano <junkio@cox.net>
118 lines
2.4 KiB
C
118 lines
2.4 KiB
C
#include "cache.h"
|
|
#include "tree-walk.h"
|
|
#include "tree.h"
|
|
|
|
void *fill_tree_descriptor(struct tree_desc *desc, const unsigned char *sha1)
|
|
{
|
|
unsigned long size = 0;
|
|
void *buf = NULL;
|
|
|
|
if (sha1) {
|
|
buf = read_object_with_reference(sha1, tree_type, &size, NULL);
|
|
if (!buf)
|
|
die("unable to read tree %s", sha1_to_hex(sha1));
|
|
}
|
|
desc->size = size;
|
|
desc->buf = buf;
|
|
return buf;
|
|
}
|
|
|
|
static int entry_compare(struct name_entry *a, struct name_entry *b)
|
|
{
|
|
return base_name_compare(
|
|
a->path, a->pathlen, a->mode,
|
|
b->path, b->pathlen, b->mode);
|
|
}
|
|
|
|
static void entry_clear(struct name_entry *a)
|
|
{
|
|
memset(a, 0, sizeof(*a));
|
|
}
|
|
|
|
static void entry_extract(struct tree_desc *t, struct name_entry *a)
|
|
{
|
|
a->sha1 = tree_entry_extract(t, &a->path, &a->mode);
|
|
a->pathlen = strlen(a->path);
|
|
}
|
|
|
|
void update_tree_entry(struct tree_desc *desc)
|
|
{
|
|
void *buf = desc->buf;
|
|
unsigned long size = desc->size;
|
|
int len = strlen(buf) + 1 + 20;
|
|
|
|
if (size < len)
|
|
die("corrupt tree file");
|
|
desc->buf = buf + len;
|
|
desc->size = size - len;
|
|
}
|
|
|
|
const unsigned char *tree_entry_extract(struct tree_desc *desc, const char **pathp, unsigned int *modep)
|
|
{
|
|
void *tree = desc->buf;
|
|
unsigned long size = desc->size;
|
|
int len = strlen(tree)+1;
|
|
const unsigned char *sha1 = tree + len;
|
|
const char *path = strchr(tree, ' ');
|
|
unsigned int mode;
|
|
|
|
if (!path || size < len + 20 || sscanf(tree, "%o", &mode) != 1)
|
|
die("corrupt tree file");
|
|
*pathp = path+1;
|
|
*modep = canon_mode(mode);
|
|
return sha1;
|
|
}
|
|
|
|
void traverse_trees(int n, struct tree_desc *t, const char *base, traverse_callback_t callback)
|
|
{
|
|
struct name_entry *entry = xmalloc(n*sizeof(*entry));
|
|
|
|
for (;;) {
|
|
struct name_entry entry[3];
|
|
unsigned long mask = 0;
|
|
int i, last;
|
|
|
|
last = -1;
|
|
for (i = 0; i < n; i++) {
|
|
if (!t[i].size)
|
|
continue;
|
|
entry_extract(t+i, entry+i);
|
|
if (last >= 0) {
|
|
int cmp = entry_compare(entry+i, entry+last);
|
|
|
|
/*
|
|
* Is the new name bigger than the old one?
|
|
* Ignore it
|
|
*/
|
|
if (cmp > 0)
|
|
continue;
|
|
/*
|
|
* Is the new name smaller than the old one?
|
|
* Ignore all old ones
|
|
*/
|
|
if (cmp < 0)
|
|
mask = 0;
|
|
}
|
|
mask |= 1ul << i;
|
|
last = i;
|
|
}
|
|
if (!mask)
|
|
break;
|
|
|
|
/*
|
|
* Update the tree entries we've walked, and clear
|
|
* all the unused name-entries.
|
|
*/
|
|
for (i = 0; i < n; i++) {
|
|
if (mask & (1ul << i)) {
|
|
update_tree_entry(t+i);
|
|
continue;
|
|
}
|
|
entry_clear(entry + i);
|
|
}
|
|
callback(n, mask, entry, base);
|
|
}
|
|
free(entry);
|
|
}
|
|
|