Make "write_cache()" and friends available as generic routines.

This is needed for the change to make "read-tree" just read into the
cache (and then you do a "checkout-cache" to update your current dir
contents).

diff --git a/cache.h b/cache.h
index 0038e8b..2581117 100644 (file)
--- a/cache.h
+++ b/cache.h
@@ -73,7 +73,10 @@ unsigned int active_nr, active_alloc;
 
 /* Initialize and use the cache information */
 extern int read_cache(void);
+extern int write_cache(int newfd, struct cache_entry **cache, int entries);
 extern int cache_name_pos(const char *name, int namelen);
+extern int add_cache_entry(struct cache_entry *ce);
+extern int remove_file_from_cache(char *path);
 extern int cache_match_stat(struct cache_entry *ce, struct stat *st);
 
 #define MTIME_CHANGED  0x0001
@@ -97,8 +100,8 @@ extern int write_sha1_file(char *buf, unsigned len);
 extern int check_sha1_signature(unsigned char *sha1, void *buf, unsigned long size);
 
 /* Convert to/from hex/sha1 representation */
-extern int get_sha1_hex(char *hex, unsigned char *sha1);
-extern char *sha1_to_hex(unsigned char *sha1); /* static buffer! */
+extern int get_sha1_hex(const char *hex, unsigned char *sha1);
+extern char *sha1_to_hex(const unsigned char *sha1);   /* static buffer result! */
 
 /* General helper functions */
 extern void usage(const char *err);

diff --git a/read-cache.c b/read-cache.c
index c42d2de..58487b5 100644 (file)
--- a/read-cache.c
+++ b/read-cache.c
@@ -26,7 +26,7 @@ static unsigned hexval(char c)
        return ~0;
 }
 
-int get_sha1_hex(char *hex, unsigned char *sha1)
+int get_sha1_hex(const char *hex, unsigned char *sha1)
 {
        int i;
        for (i = 0; i < 20; i++) {
@@ -39,7 +39,7 @@ int get_sha1_hex(char *hex, unsigned char *sha1)
        return 0;
 }
 
-char * sha1_to_hex(unsigned char *sha1)
+char * sha1_to_hex(const unsigned char *sha1)
 {
        static char buffer[50];
        static const char hex[] = "0123456789abcdef";
@@ -281,6 +281,44 @@ int cache_name_pos(const char *name, int namelen)
        return first;
 }
 
+int remove_file_from_cache(char *path)
+{
+       int pos = cache_name_pos(path, strlen(path));
+       if (pos < 0) {
+               pos = -pos-1;
+               active_nr--;
+               if (pos < active_nr)
+                       memmove(active_cache + pos, active_cache + pos + 1, (active_nr - pos - 1) * sizeof(struct cache_entry *));
+       }
+       return 0;
+}
+
+int add_cache_entry(struct cache_entry *ce)
+{
+       int pos;
+
+       pos = cache_name_pos(ce->name, ce->namelen);
+
+       /* existing match? Just replace it */
+       if (pos < 0) {
+               active_cache[-pos-1] = ce;
+               return 0;
+       }
+
+       /* Make sure the array is big enough .. */
+       if (active_nr == active_alloc) {
+               active_alloc = alloc_nr(active_alloc);
+               active_cache = realloc(active_cache, active_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;
+       return 0;
+}
+
 static int verify_hdr(struct cache_header *hdr, unsigned long size)
 {
        SHA_CTX c;
@@ -354,3 +392,33 @@ unmap:
        return error("verify header failed");
 }
 
+int write_cache(int newfd, struct cache_entry **cache, int entries)
+{
+       SHA_CTX c;
+       struct cache_header hdr;
+       int i;
+
+       hdr.signature = CACHE_SIGNATURE;
+       hdr.version = 1;
+       hdr.entries = entries;
+
+       SHA1_Init(&c);
+       SHA1_Update(&c, &hdr, offsetof(struct cache_header, sha1));
+       for (i = 0; i < entries; i++) {
+               struct cache_entry *ce = cache[i];
+               int size = ce_size(ce);
+               SHA1_Update(&c, ce, size);
+       }
+       SHA1_Final(hdr.sha1, &c);
+
+       if (write(newfd, &hdr, sizeof(hdr)) != sizeof(hdr))
+               return -1;
+
+       for (i = 0; i < entries; i++) {
+               struct cache_entry *ce = cache[i];
+               int size = ce_size(ce);
+               if (write(newfd, ce, size) != size)
+                       return -1;
+       }
+       return 0;
+}

diff --git a/update-cache.c b/update-cache.c
index 7a076be..03b111b 100644 (file)
--- a/update-cache.c
+++ b/update-cache.c
@@ -5,44 +5,6 @@
  */
 #include "cache.h"
 
-static int remove_file_from_cache(char *path)
-{
-       int pos = cache_name_pos(path, strlen(path));
-       if (pos < 0) {
-               pos = -pos-1;
-               active_nr--;
-               if (pos < active_nr)
-                       memmove(active_cache + pos, active_cache + pos + 1, (active_nr - pos - 1) * sizeof(struct cache_entry *));
-       }
-       return 0;
-}
-
-static int add_cache_entry(struct cache_entry *ce)
-{
-       int pos;
-
-       pos = cache_name_pos(ce->name, ce->namelen);
-
-       /* existing match? Just replace it */
-       if (pos < 0) {
-               active_cache[-pos-1] = ce;
-               return 0;
-       }
-
-       /* Make sure the array is big enough .. */
-       if (active_nr == active_alloc) {
-               active_alloc = alloc_nr(active_alloc);
-               active_cache = realloc(active_cache, active_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;
-       return 0;
-}
-
 static int index_fd(const char *path, int namelen, struct cache_entry *ce, int fd, struct stat *st)
 {
        z_stream stream;
@@ -126,37 +88,6 @@ static int add_file_to_cache(char *path)
        return add_cache_entry(ce);
 }
 
-static int write_cache(int newfd, struct cache_entry **cache, int entries)
-{
-       SHA_CTX c;
-       struct cache_header hdr;
-       int i;
-
-       hdr.signature = CACHE_SIGNATURE;
-       hdr.version = 1;
-       hdr.entries = entries;
-
-       SHA1_Init(&c);
-       SHA1_Update(&c, &hdr, offsetof(struct cache_header, sha1));
-       for (i = 0; i < entries; i++) {
-               struct cache_entry *ce = cache[i];
-               int size = ce_size(ce);
-               SHA1_Update(&c, ce, size);
-       }
-       SHA1_Final(hdr.sha1, &c);
-
-       if (write(newfd, &hdr, sizeof(hdr)) != sizeof(hdr))
-               return -1;
-
-       for (i = 0; i < entries; i++) {
-               struct cache_entry *ce = cache[i];
-               int size = ce_size(ce);
-               if (write(newfd, ce, size) != size)
-                       return -1;
-       }
-       return 0;
-}              
-
 /*
  * We fundamentally don't like some paths: we don't want
  * dot or dot-dot anywhere, and in fact, we don't even want