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authorJunio C Hamano <junkio@cox.net>2007-04-02 06:26:07 (GMT)
committerJunio C Hamano <junkio@cox.net>2007-04-23 05:53:54 (GMT)
commit4aab5b46f44a7ba860e07a52be506b7b57b2bd5f (patch)
tree7096edf9a3f1d61fc9d193f3482dca34558f5405 /read-cache.c
parent228e94f93570b580da388069900c56b813c91953 (diff)
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Make read-cache.c "the_index" free.
This makes all low-level functions defined in read-cache.c to take an explicit index_state structure as their first parameter, to specify which index to work on. These functions traditionally operated on "the_index" and were named foo_cache(); the counterparts this patch introduces are called foo_index(). The traditional foo_cache() functions are made into macros that give "the_index" to their corresponding foo_index() functions. Signed-off-by: Junio C Hamano <junkio@cox.net>
Diffstat (limited to 'read-cache.c')
-rw-r--r--read-cache.c237
1 files changed, 128 insertions, 109 deletions
diff --git a/read-cache.c b/read-cache.c
index 9b4385e..e04e991 100644
--- a/read-cache.c
+++ b/read-cache.c
@@ -3,6 +3,7 @@
*
* Copyright (C) Linus Torvalds, 2005
*/
+#define NO_THE_INDEX_COMPATIBILITY_MACROS
#include "cache.h"
#include "cache-tree.h"
#include "refs.h"
@@ -20,9 +21,6 @@
#define CACHE_EXT_TREE 0x54524545 /* "TREE" */
struct index_state the_index;
-#define index_file_timestamp (the_index.timestamp)
-#define cache_mmap (the_index.mmap)
-#define cache_mmap_size (the_index.mmap_size)
/*
* This only updates the "non-critical" parts of the directory
@@ -192,7 +190,8 @@ static int ce_match_stat_basic(struct cache_entry *ce, struct stat *st)
return changed;
}
-int ce_match_stat(struct cache_entry *ce, struct stat *st, int options)
+int ie_match_stat(struct index_state *istate,
+ struct cache_entry *ce, struct stat *st, int options)
{
unsigned int changed;
int ignore_valid = options & 01;
@@ -224,8 +223,8 @@ int ce_match_stat(struct cache_entry *ce, struct stat *st, int options)
* carefully than others.
*/
if (!changed &&
- index_file_timestamp &&
- index_file_timestamp <= ntohl(ce->ce_mtime.sec)) {
+ istate->timestamp &&
+ istate->timestamp <= ntohl(ce->ce_mtime.sec)) {
if (assume_racy_is_modified)
changed |= DATA_CHANGED;
else
@@ -235,10 +234,11 @@ int ce_match_stat(struct cache_entry *ce, struct stat *st, int options)
return changed;
}
-int ce_modified(struct cache_entry *ce, struct stat *st, int really)
+int ie_modified(struct index_state *istate,
+ struct cache_entry *ce, struct stat *st, int really)
{
int changed, changed_fs;
- changed = ce_match_stat(ce, st, really);
+ changed = ie_match_stat(istate, ce, st, really);
if (!changed)
return 0;
/*
@@ -306,15 +306,15 @@ int cache_name_compare(const char *name1, int flags1, const char *name2, int fla
return 0;
}
-int cache_name_pos(const char *name, int namelen)
+int index_name_pos(struct index_state *istate, const char *name, int namelen)
{
int first, last;
first = 0;
- last = active_nr;
+ last = istate->cache_nr;
while (last > first) {
int next = (last + first) >> 1;
- struct cache_entry *ce = active_cache[next];
+ struct cache_entry *ce = istate->cache[next];
int cmp = cache_name_compare(name, namelen, ce->name, ntohs(ce->ce_flags));
if (!cmp)
return next;
@@ -328,27 +328,29 @@ int cache_name_pos(const char *name, int namelen)
}
/* Remove entry, return true if there are more entries to go.. */
-int remove_cache_entry_at(int pos)
+int remove_index_entry_at(struct index_state *istate, int pos)
{
- active_cache_changed = 1;
- active_nr--;
- if (pos >= active_nr)
+ istate->cache_changed = 1;
+ istate->cache_nr--;
+ if (pos >= istate->cache_nr)
return 0;
- memmove(active_cache + pos, active_cache + pos + 1, (active_nr - pos) * sizeof(struct cache_entry *));
+ memmove(istate->cache + pos,
+ istate->cache + pos + 1,
+ (istate->cache_nr - pos) * sizeof(struct cache_entry *));
return 1;
}
-int remove_file_from_cache(const char *path)
+int remove_file_from_index(struct index_state *istate, const char *path)
{
- int pos = cache_name_pos(path, strlen(path));
+ int pos = index_name_pos(istate, path, strlen(path));
if (pos < 0)
pos = -pos-1;
- while (pos < active_nr && !strcmp(active_cache[pos]->name, path))
- remove_cache_entry_at(pos);
+ while (pos < istate->cache_nr && !strcmp(istate->cache[pos]->name, path))
+ remove_index_entry_at(istate, pos);
return 0;
}
-int add_file_to_cache(const char *path, int verbose)
+int add_file_to_index(struct index_state *istate, const char *path, int verbose)
{
int size, namelen;
struct stat st;
@@ -378,19 +380,19 @@ int add_file_to_cache(const char *path, int verbose)
* from it, otherwise assume unexecutable regular file.
*/
struct cache_entry *ent;
- int pos = cache_name_pos(path, namelen);
+ int pos = index_name_pos(istate, path, namelen);
- ent = (0 <= pos) ? active_cache[pos] : NULL;
+ ent = (0 <= pos) ? istate->cache[pos] : NULL;
ce->ce_mode = ce_mode_from_stat(ent, st.st_mode);
}
if (index_path(ce->sha1, path, &st, 1))
die("unable to index file %s", path);
- if (add_cache_entry(ce, ADD_CACHE_OK_TO_ADD|ADD_CACHE_OK_TO_REPLACE))
+ if (add_index_entry(istate, ce, ADD_CACHE_OK_TO_ADD|ADD_CACHE_OK_TO_REPLACE))
die("unable to add %s to index",path);
if (verbose)
printf("add '%s'\n", path);
- cache_tree_invalidate_path(active_cache_tree, path);
+ cache_tree_invalidate_path(istate->cache_tree, path);
return 0;
}
@@ -494,15 +496,16 @@ inside:
* Do we have another file that has the beginning components being a
* proper superset of the name we're trying to add?
*/
-static int has_file_name(const struct cache_entry *ce, int pos, int ok_to_replace)
+static int has_file_name(struct index_state *istate,
+ const struct cache_entry *ce, int pos, int ok_to_replace)
{
int retval = 0;
int len = ce_namelen(ce);
int stage = ce_stage(ce);
const char *name = ce->name;
- while (pos < active_nr) {
- struct cache_entry *p = active_cache[pos++];
+ while (pos < istate->cache_nr) {
+ struct cache_entry *p = istate->cache[pos++];
if (len >= ce_namelen(p))
break;
@@ -517,7 +520,7 @@ static int has_file_name(const struct cache_entry *ce, int pos, int ok_to_replac
retval = -1;
if (!ok_to_replace)
break;
- remove_cache_entry_at(--pos);
+ remove_index_entry_at(istate, --pos);
}
return retval;
}
@@ -526,7 +529,8 @@ static int has_file_name(const struct cache_entry *ce, int pos, int ok_to_replac
* Do we have another file with a pathname that is a proper
* subset of the name we're trying to add?
*/
-static int has_dir_name(const struct cache_entry *ce, int pos, int ok_to_replace)
+static int has_dir_name(struct index_state *istate,
+ const struct cache_entry *ce, int pos, int ok_to_replace)
{
int retval = 0;
int stage = ce_stage(ce);
@@ -544,7 +548,7 @@ static int has_dir_name(const struct cache_entry *ce, int pos, int ok_to_replace
}
len = slash - name;
- pos = cache_name_pos(name, ntohs(create_ce_flags(len, stage)));
+ pos = index_name_pos(istate, name, ntohs(create_ce_flags(len, stage)));
if (pos >= 0) {
/*
* Found one, but not so fast. This could
@@ -554,11 +558,11 @@ static int has_dir_name(const struct cache_entry *ce, int pos, int ok_to_replace
* it is Ok to have a directory at the same
* path.
*/
- if (stage || active_cache[pos]->ce_mode) {
+ if (stage || istate->cache[pos]->ce_mode) {
retval = -1;
if (!ok_to_replace)
break;
- remove_cache_entry_at(pos);
+ remove_index_entry_at(istate, pos);
continue;
}
}
@@ -570,8 +574,8 @@ static int has_dir_name(const struct cache_entry *ce, int pos, int ok_to_replace
* already matches the sub-directory, then we know
* we're ok, and we can exit.
*/
- while (pos < active_nr) {
- struct cache_entry *p = active_cache[pos];
+ while (pos < istate->cache_nr) {
+ struct cache_entry *p = istate->cache[pos];
if ((ce_namelen(p) <= len) ||
(p->name[len] != '/') ||
memcmp(p->name, name, len))
@@ -598,7 +602,9 @@ static int has_dir_name(const struct cache_entry *ce, int pos, int ok_to_replace
* from the cache so the caller should recompute the insert position.
* When this happens, we return non-zero.
*/
-static int check_file_directory_conflict(const struct cache_entry *ce, int pos, int ok_to_replace)
+static int check_file_directory_conflict(struct index_state *istate,
+ const struct cache_entry *ce,
+ int pos, int ok_to_replace)
{
int retval;
@@ -613,28 +619,28 @@ static int check_file_directory_conflict(const struct cache_entry *ce, int pos,
* first, since removing those will not change the position
* in the array.
*/
- retval = has_file_name(ce, pos, ok_to_replace);
+ retval = has_file_name(istate, ce, pos, ok_to_replace);
/*
* Then check if the path might have a clashing sub-directory
* before it.
*/
- return retval + has_dir_name(ce, pos, ok_to_replace);
+ return retval + has_dir_name(istate, ce, pos, ok_to_replace);
}
-int add_cache_entry(struct cache_entry *ce, int option)
+int add_index_entry(struct index_state *istate, struct cache_entry *ce, int option)
{
int pos;
int ok_to_add = option & ADD_CACHE_OK_TO_ADD;
int ok_to_replace = option & ADD_CACHE_OK_TO_REPLACE;
int skip_df_check = option & ADD_CACHE_SKIP_DFCHECK;
- pos = cache_name_pos(ce->name, ntohs(ce->ce_flags));
+ pos = index_name_pos(istate, ce->name, ntohs(ce->ce_flags));
/* existing match? Just replace it. */
if (pos >= 0) {
- active_cache_changed = 1;
- active_cache[pos] = ce;
+ istate->cache_changed = 1;
+ istate->cache[pos] = ce;
return 0;
}
pos = -pos-1;
@@ -643,10 +649,10 @@ int add_cache_entry(struct cache_entry *ce, int option)
* Inserting a merged entry ("stage 0") into the index
* will always replace all non-merged entries..
*/
- if (pos < active_nr && ce_stage(ce) == 0) {
- while (ce_same_name(active_cache[pos], ce)) {
+ if (pos < istate->cache_nr && ce_stage(ce) == 0) {
+ while (ce_same_name(istate->cache[pos], ce)) {
ok_to_add = 1;
- if (!remove_cache_entry_at(pos))
+ if (!remove_index_entry_at(istate, pos))
break;
}
}
@@ -657,25 +663,29 @@ int add_cache_entry(struct cache_entry *ce, int option)
return -1;
if (!skip_df_check &&
- check_file_directory_conflict(ce, pos, ok_to_replace)) {
+ check_file_directory_conflict(istate, ce, pos, ok_to_replace)) {
if (!ok_to_replace)
- return error("'%s' appears as both a file and as a directory", ce->name);
- pos = cache_name_pos(ce->name, ntohs(ce->ce_flags));
+ return error("'%s' appears as both a file and as a directory",
+ ce->name);
+ pos = index_name_pos(istate, ce->name, ntohs(ce->ce_flags));
pos = -pos-1;
}
/* Make sure the array is big enough .. */
- if (active_nr == active_alloc) {
- active_alloc = alloc_nr(active_alloc);
- active_cache = xrealloc(active_cache, active_alloc * sizeof(struct cache_entry *));
+ if (istate->cache_nr == istate->cache_alloc) {
+ istate->cache_alloc = alloc_nr(istate->cache_alloc);
+ istate->cache = xrealloc(istate->cache,
+ istate->cache_alloc * sizeof(struct cache_entry *));
}
/* Add it in.. */
- active_nr++;
- if (active_nr > pos)
- memmove(active_cache + pos + 1, active_cache + pos, (active_nr - pos - 1) * sizeof(ce));
- active_cache[pos] = ce;
- active_cache_changed = 1;
+ istate->cache_nr++;
+ if (istate->cache_nr > pos)
+ memmove(istate->cache + pos + 1,
+ istate->cache + pos,
+ (istate->cache_nr - pos - 1) * sizeof(ce));
+ istate->cache[pos] = ce;
+ istate->cache_changed = 1;
return 0;
}
@@ -690,7 +700,8 @@ int add_cache_entry(struct cache_entry *ce, int option)
* For example, you'd want to do this after doing a "git-read-tree",
* to link up the stat cache details with the proper files.
*/
-static struct cache_entry *refresh_cache_ent(struct cache_entry *ce, int really, int *err)
+static struct cache_entry *refresh_cache_ent(struct index_state *istate,
+ struct cache_entry *ce, int really, int *err)
{
struct stat st;
struct cache_entry *updated;
@@ -702,7 +713,7 @@ static struct cache_entry *refresh_cache_ent(struct cache_entry *ce, int really,
return NULL;
}
- changed = ce_match_stat(ce, &st, really);
+ changed = ie_match_stat(istate, ce, &st, really);
if (!changed) {
if (really && assume_unchanged &&
!(ce->ce_flags & htons(CE_VALID)))
@@ -711,7 +722,7 @@ static struct cache_entry *refresh_cache_ent(struct cache_entry *ce, int really,
return ce;
}
- if (ce_modified(ce, &st, really)) {
+ if (ie_modified(istate, ce, &st, really)) {
if (err)
*err = EINVAL;
return NULL;
@@ -734,7 +745,7 @@ static struct cache_entry *refresh_cache_ent(struct cache_entry *ce, int really,
return updated;
}
-int refresh_cache(unsigned int flags)
+int refresh_index(struct index_state *istate, unsigned int flags)
{
int i;
int has_errors = 0;
@@ -743,14 +754,14 @@ int refresh_cache(unsigned int flags)
int quiet = (flags & REFRESH_QUIET) != 0;
int not_new = (flags & REFRESH_IGNORE_MISSING) != 0;
- for (i = 0; i < active_nr; i++) {
+ for (i = 0; i < istate->cache_nr; i++) {
struct cache_entry *ce, *new;
int cache_errno = 0;
- ce = active_cache[i];
+ ce = istate->cache[i];
if (ce_stage(ce)) {
- while ((i < active_nr) &&
- ! strcmp(active_cache[i]->name, ce->name))
+ while ((i < istate->cache_nr) &&
+ ! strcmp(istate->cache[i]->name, ce->name))
i++;
i--;
if (allow_unmerged)
@@ -760,7 +771,7 @@ int refresh_cache(unsigned int flags)
continue;
}
- new = refresh_cache_ent(ce, really, &cache_errno);
+ new = refresh_cache_ent(istate, ce, really, &cache_errno);
if (new == ce)
continue;
if (!new) {
@@ -771,7 +782,7 @@ int refresh_cache(unsigned int flags)
* means the index is not valid anymore.
*/
ce->ce_flags &= ~htons(CE_VALID);
- active_cache_changed = 1;
+ istate->cache_changed = 1;
}
if (quiet)
continue;
@@ -779,18 +790,18 @@ int refresh_cache(unsigned int flags)
has_errors = 1;
continue;
}
- active_cache_changed = 1;
- /* You can NOT just free active_cache[i] here, since it
+ istate->cache_changed = 1;
+ /* You can NOT just free istate->cache[i] here, since it
* might not be necessarily malloc()ed but can also come
* from mmap(). */
- active_cache[i] = new;
+ istate->cache[i] = new;
}
return has_errors;
}
struct cache_entry *refresh_cache_entry(struct cache_entry *ce, int really)
{
- return refresh_cache_ent(ce, really, NULL);
+ return refresh_cache_ent(&the_index, ce, really, NULL);
}
static int verify_hdr(struct cache_header *hdr, unsigned long size)
@@ -810,11 +821,12 @@ static int verify_hdr(struct cache_header *hdr, unsigned long size)
return 0;
}
-static int read_index_extension(const char *ext, void *data, unsigned long sz)
+static int read_index_extension(struct index_state *istate,
+ const char *ext, void *data, unsigned long sz)
{
switch (CACHE_EXT(ext)) {
case CACHE_EXT_TREE:
- active_cache_tree = cache_tree_read(data, sz);
+ istate->cache_tree = cache_tree_read(data, sz);
break;
default:
if (*ext < 'A' || 'Z' < *ext)
@@ -826,13 +838,13 @@ static int read_index_extension(const char *ext, void *data, unsigned long sz)
return 0;
}
-int read_cache(void)
+int read_index(struct index_state *istate)
{
- return read_cache_from(get_index_file());
+ return read_index_from(istate, get_index_file());
}
/* remember to discard_cache() before reading a different cache! */
-int read_cache_from(const char *path)
+int read_index_from(struct index_state *istate, const char *path)
{
int fd, i;
struct stat st;
@@ -840,11 +852,11 @@ int read_cache_from(const char *path)
struct cache_header *hdr;
errno = EBUSY;
- if (cache_mmap)
- return active_nr;
+ if (istate->mmap)
+ return istate->cache_nr;
errno = ENOENT;
- index_file_timestamp = 0;
+ istate->timestamp = 0;
fd = open(path, O_RDONLY);
if (fd < 0) {
if (errno == ENOENT)
@@ -853,32 +865,35 @@ int read_cache_from(const char *path)
}
if (!fstat(fd, &st)) {
- cache_mmap_size = xsize_t(st.st_size);
+ istate->mmap_size = xsize_t(st.st_size);
errno = EINVAL;
- if (cache_mmap_size >= sizeof(struct cache_header) + 20)
- cache_mmap = xmmap(NULL, cache_mmap_size, PROT_READ | PROT_WRITE, MAP_PRIVATE, fd, 0);
+ if (istate->mmap_size >= sizeof(struct cache_header) + 20)
+ istate->mmap = xmmap(NULL, istate->mmap_size,
+ PROT_READ | PROT_WRITE, MAP_PRIVATE, fd, 0);
else
die("index file smaller than expected");
} else
die("cannot stat the open index (%s)", strerror(errno));
close(fd);
- hdr = cache_mmap;
- if (verify_hdr(hdr, cache_mmap_size) < 0)
+ hdr = istate->mmap;
+ if (verify_hdr(hdr, istate->mmap_size) < 0)
goto unmap;
- active_nr = ntohl(hdr->hdr_entries);
- active_alloc = alloc_nr(active_nr);
- active_cache = xcalloc(active_alloc, sizeof(struct cache_entry *));
+ istate->cache_nr = ntohl(hdr->hdr_entries);
+ istate->cache_alloc = alloc_nr(istate->cache_nr);
+ istate->cache = xcalloc(istate->cache_alloc, sizeof(struct cache_entry *));
offset = sizeof(*hdr);
- for (i = 0; i < active_nr; i++) {
- struct cache_entry *ce = (struct cache_entry *) ((char *) cache_mmap + offset);
+ for (i = 0; i < istate->cache_nr; i++) {
+ struct cache_entry *ce;
+
+ ce = (struct cache_entry *)((char *)(istate->mmap) + offset);
offset = offset + ce_size(ce);
- active_cache[i] = ce;
+ istate->cache[i] = ce;
}
- index_file_timestamp = st.st_mtime;
- while (offset <= cache_mmap_size - 20 - 8) {
+ istate->timestamp = st.st_mtime;
+ while (offset <= istate->mmap_size - 20 - 8) {
/* After an array of active_nr index entries,
* there can be arbitrary number of extended
* sections, each of which is prefixed with
@@ -886,35 +901,37 @@ int read_cache_from(const char *path)
* in 4-byte network byte order.
*/
unsigned long extsize;
- memcpy(&extsize, (char *) cache_mmap + offset + 4, 4);
+ memcpy(&extsize, (char *)(istate->mmap) + offset + 4, 4);
extsize = ntohl(extsize);
- if (read_index_extension(((const char *) cache_mmap) + offset,
- (char *) cache_mmap + offset + 8,
+ if (read_index_extension(istate,
+ ((const char *) (istate->mmap)) + offset,
+ (char *) (istate->mmap) + offset + 8,
extsize) < 0)
goto unmap;
offset += 8;
offset += extsize;
}
- return active_nr;
+ return istate->cache_nr;
unmap:
- munmap(cache_mmap, cache_mmap_size);
+ munmap(istate->mmap, istate->mmap_size);
errno = EINVAL;
die("index file corrupt");
}
-int discard_cache(void)
+int discard_index(struct index_state *istate)
{
int ret;
- active_nr = active_cache_changed = 0;
- index_file_timestamp = 0;
- cache_tree_free(&active_cache_tree);
- if (cache_mmap == NULL)
+ istate->cache_nr = 0;
+ istate->cache_changed = 0;
+ istate->timestamp = 0;
+ cache_tree_free(&(istate->cache_tree));
+ if (istate->mmap == NULL)
return 0;
- ret = munmap(cache_mmap, cache_mmap_size);
- cache_mmap = NULL;
- cache_mmap_size = 0;
+ ret = munmap(istate->mmap, istate->mmap_size);
+ istate->mmap = NULL;
+ istate->mmap_size = 0;
/* no need to throw away allocated active_cache */
return ret;
@@ -1033,11 +1050,13 @@ static void ce_smudge_racily_clean_entry(struct cache_entry *ce)
}
}
-int write_cache(int newfd, struct cache_entry **cache, int entries)
+int write_index(struct index_state *istate, int newfd)
{
SHA_CTX c;
struct cache_header hdr;
int i, removed;
+ struct cache_entry **cache = istate->cache;
+ int entries = istate->cache_nr;
for (i = removed = 0; i < entries; i++)
if (!cache[i]->ce_mode)
@@ -1055,17 +1074,17 @@ int write_cache(int newfd, struct cache_entry **cache, int entries)
struct cache_entry *ce = cache[i];
if (!ce->ce_mode)
continue;
- if (index_file_timestamp &&
- index_file_timestamp <= ntohl(ce->ce_mtime.sec))
+ if (istate->timestamp &&
+ istate->timestamp <= ntohl(ce->ce_mtime.sec))
ce_smudge_racily_clean_entry(ce);
if (ce_write(&c, newfd, ce, ce_size(ce)) < 0)
return -1;
}
/* Write extension data here */
- if (active_cache_tree) {
+ if (istate->cache_tree) {
unsigned long sz;
- void *data = cache_tree_write(active_cache_tree, &sz);
+ void *data = cache_tree_write(istate->cache_tree, &sz);
if (data &&
!write_index_ext_header(&c, newfd, CACHE_EXT_TREE, sz) &&
!ce_write(&c, newfd, data, sz))