diff options
| -rw-r--r-- | cache.h | 3 | ||||
| -rw-r--r-- | path-list.c | 105 | ||||
| -rw-r--r-- | path-list.h | 22 | ||||
| -rw-r--r-- | read-cache.c | 87 |
4 files changed, 172 insertions, 45 deletions
@@ -115,6 +115,7 @@ static inline unsigned int create_ce_mode(unsigned int mode) extern struct cache_entry **active_cache; extern unsigned int active_nr, active_alloc, active_cache_changed; extern struct cache_tree *active_cache_tree; +extern int cache_errno; #define GIT_DIR_ENVIRONMENT "GIT_DIR" #define DEFAULT_GIT_DIR_ENVIRONMENT ".git" @@ -142,6 +143,7 @@ extern void verify_non_filename(const char *prefix, const char *name); /* Initialize and use the cache information */ extern int read_cache(void); +extern int read_cache_from(const char *path); extern int write_cache(int newfd, struct cache_entry **cache, int entries); extern int verify_path(const char *path); extern int cache_name_pos(const char *name, int namelen); @@ -149,6 +151,7 @@ extern int cache_name_pos(const char *name, int namelen); #define ADD_CACHE_OK_TO_REPLACE 2 /* Ok to replace file/directory */ #define ADD_CACHE_SKIP_DFCHECK 4 /* Ok to skip DF conflict checks */ extern int add_cache_entry(struct cache_entry *ce, int option); +extern struct cache_entry *refresh_cache_entry(struct cache_entry *ce, int really); extern int remove_cache_entry_at(int pos); extern int remove_file_from_cache(const char *path); extern int ce_same_name(struct cache_entry *a, struct cache_entry *b); diff --git a/path-list.c b/path-list.c new file mode 100644 index 0000000000..f15a10de37 --- /dev/null +++ b/path-list.c @@ -0,0 +1,105 @@ +#include <stdio.h> +#include "cache.h" +#include "path-list.h" + +/* if there is no exact match, point to the index where the entry could be + * inserted */ +static int get_entry_index(const struct path_list *list, const char *path, + int *exact_match) +{ + int left = -1, right = list->nr; + + while (left + 1 < right) { + int middle = (left + right) / 2; + int compare = strcmp(path, list->items[middle].path); + if (compare < 0) + right = middle; + else if (compare > 0) + left = middle; + else { + *exact_match = 1; + return middle; + } + } + + *exact_match = 0; + return right; +} + +/* returns -1-index if already exists */ +static int add_entry(struct path_list *list, const char *path) +{ + int exact_match; + int index = get_entry_index(list, path, &exact_match); + + if (exact_match) + return -1 - index; + + if (list->nr + 1 >= list->alloc) { + list->alloc += 32; + list->items = xrealloc(list->items, list->alloc + * sizeof(struct path_list_item)); + } + if (index < list->nr) + memmove(list->items + index + 1, list->items + index, + (list->nr - index) + * sizeof(struct path_list_item)); + list->items[index].path = list->strdup_paths ? + strdup(path) : (char *)path; + list->items[index].util = NULL; + list->nr++; + + return index; +} + +struct path_list_item *path_list_insert(const char *path, struct path_list *list) +{ + int index = add_entry(list, path); + + if (index < 0) + index = 1 - index; + + return list->items + index; +} + +int path_list_has_path(const struct path_list *list, const char *path) +{ + int exact_match; + get_entry_index(list, path, &exact_match); + return exact_match; +} + +struct path_list_item *path_list_lookup(const char *path, struct path_list *list) +{ + int exact_match, i = get_entry_index(list, path, &exact_match); + if (!exact_match) + return NULL; + return list->items + i; +} + +void path_list_clear(struct path_list *list, int free_items) +{ + if (list->items) { + int i; + if (free_items) + for (i = 0; i < list->nr; i++) { + if (list->strdup_paths) + free(list->items[i].path); + if (list->items[i].util) + free(list->items[i].util); + } + free(list->items); + } + list->items = NULL; + list->nr = list->alloc = 0; +} + +void print_path_list(const char *text, const struct path_list *p) +{ + int i; + if ( text ) + printf("%s\n", text); + for (i = 0; i < p->nr; i++) + printf("%s:%p\n", p->items[i].path, p->items[i].util); +} + diff --git a/path-list.h b/path-list.h new file mode 100644 index 0000000000..d6401eaa35 --- /dev/null +++ b/path-list.h @@ -0,0 +1,22 @@ +#ifndef _PATH_LIST_H_ +#define _PATH_LIST_H_ + +struct path_list_item { + char *path; + void *util; +}; +struct path_list +{ + struct path_list_item *items; + unsigned int nr, alloc; + unsigned int strdup_paths:1; +}; + +void print_path_list(const char *text, const struct path_list *p); + +int path_list_has_path(const struct path_list *list, const char *path); +void path_list_clear(struct path_list *list, int free_items); +struct path_list_item *path_list_insert(const char *path, struct path_list *list); +struct path_list_item *path_list_lookup(const char *path, struct path_list *list); + +#endif /* _PATH_LIST_H_ */ diff --git a/read-cache.c b/read-cache.c index a50d3612c8..4c47a0eb9f 100644 --- a/read-cache.c +++ b/read-cache.c @@ -24,6 +24,11 @@ unsigned int active_nr = 0, active_alloc = 0, active_cache_changed = 0; struct cache_tree *active_cache_tree = NULL; +int cache_errno = 0; + +static void *cache_mmap = NULL; +static size_t cache_mmap_size = 0; + /* * This only updates the "non-critical" parts of the directory * cache, ie the parts that aren't tracked by GIT, and only used @@ -577,22 +582,6 @@ int add_cache_entry(struct cache_entry *ce, int option) return 0; } -/* Three functions to allow overloaded pointer return; see linux/err.h */ -static inline void *ERR_PTR(long error) -{ - return (void *) error; -} - -static inline long PTR_ERR(const void *ptr) -{ - return (long) ptr; -} - -static inline long IS_ERR(const void *ptr) -{ - return (unsigned long)ptr > (unsigned long)-1000L; -} - /* * "refresh" does not calculate a new sha1 file or bring the * cache up-to-date for mode/content changes. But what it @@ -604,14 +593,16 @@ static inline long IS_ERR(const void *ptr) * 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_entry(struct cache_entry *ce, int really) +struct cache_entry *refresh_cache_entry(struct cache_entry *ce, int really) { struct stat st; struct cache_entry *updated; int changed, size; - if (lstat(ce->name, &st) < 0) - return ERR_PTR(-errno); + if (lstat(ce->name, &st) < 0) { + cache_errno = errno; + return NULL; + } changed = ce_match_stat(ce, &st, really); if (!changed) { @@ -619,11 +610,13 @@ static struct cache_entry *refresh_entry(struct cache_entry *ce, int really) !(ce->ce_flags & htons(CE_VALID))) ; /* mark this one VALID again */ else - return NULL; + return ce; } - if (ce_modified(ce, &st, really)) - return ERR_PTR(-EINVAL); + if (ce_modified(ce, &st, really)) { + cache_errno = EINVAL; + return NULL; + } size = ce_size(ce); updated = xmalloc(size); @@ -666,13 +659,13 @@ int refresh_cache(unsigned int flags) continue; } - new = refresh_entry(ce, really); - if (!new) + new = refresh_cache_entry(ce, really); + if (new == ce) continue; - if (IS_ERR(new)) { - if (not_new && PTR_ERR(new) == -ENOENT) + if (!new) { + if (not_new && cache_errno == ENOENT) continue; - if (really && PTR_ERR(new) == -EINVAL) { + if (really && cache_errno == EINVAL) { /* If we are doing --really-refresh that * means the index is not valid anymore. */ @@ -729,39 +722,43 @@ static int read_index_extension(const char *ext, void *data, unsigned long sz) int read_cache(void) { + return read_cache_from(get_index_file()); +} + +/* remember to discard_cache() before reading a different cache! */ +int read_cache_from(const char *path) +{ int fd, i; struct stat st; - unsigned long size, offset; - void *map; + unsigned long offset; struct cache_header *hdr; errno = EBUSY; - if (active_cache) + if (cache_mmap) return active_nr; errno = ENOENT; index_file_timestamp = 0; - fd = open(get_index_file(), O_RDONLY); + fd = open(path, O_RDONLY); if (fd < 0) { if (errno == ENOENT) return 0; die("index file open failed (%s)", strerror(errno)); } - size = 0; /* avoid gcc warning */ - map = MAP_FAILED; + cache_mmap = MAP_FAILED; if (!fstat(fd, &st)) { - size = st.st_size; + cache_mmap_size = st.st_size; errno = EINVAL; - if (size >= sizeof(struct cache_header) + 20) - map = mmap(NULL, size, PROT_READ | PROT_WRITE, MAP_PRIVATE, fd, 0); + if (cache_mmap_size >= sizeof(struct cache_header) + 20) + cache_mmap = mmap(NULL, cache_mmap_size, PROT_READ | PROT_WRITE, MAP_PRIVATE, fd, 0); } close(fd); - if (map == MAP_FAILED) + if (cache_mmap == MAP_FAILED) die("index file mmap failed (%s)", strerror(errno)); - hdr = map; - if (verify_hdr(hdr, size) < 0) + hdr = cache_mmap; + if (verify_hdr(hdr, cache_mmap_size) < 0) goto unmap; active_nr = ntohl(hdr->hdr_entries); @@ -770,12 +767,12 @@ int read_cache(void) offset = sizeof(*hdr); for (i = 0; i < active_nr; i++) { - struct cache_entry *ce = (struct cache_entry *) ((char *) map + offset); + struct cache_entry *ce = (struct cache_entry *) ((char *) cache_mmap + offset); offset = offset + ce_size(ce); active_cache[i] = ce; } index_file_timestamp = st.st_mtime; - while (offset <= size - 20 - 8) { + while (offset <= cache_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 @@ -783,10 +780,10 @@ int read_cache(void) * in 4-byte network byte order. */ unsigned long extsize; - memcpy(&extsize, (char *) map + offset + 4, 4); + memcpy(&extsize, (char *) cache_mmap + offset + 4, 4); extsize = ntohl(extsize); - if (read_index_extension(((const char *) map) + offset, - (char *) map + offset + 8, + if (read_index_extension(((const char *) cache_mmap) + offset, + (char *) cache_mmap + offset + 8, extsize) < 0) goto unmap; offset += 8; @@ -795,7 +792,7 @@ int read_cache(void) return active_nr; unmap: - munmap(map, size); + munmap(cache_mmap, cache_mmap_size); errno = EINVAL; die("index file corrupt"); } |