slim down "git show-index"

As the documentation says, this is primarily for debugging, and
in the longer term we should rename it to test-show-index or something.

In the meantime, just avoid xmalloc (which slurps in the rest of git), and
separating out the trivial hex functions into "hex.o".

This results in

  [torvalds@nehalem git]$ size git-show-index
       text    data     bss     dec     hex filename
     222818    2276  112688  337782   52776 git-show-index (before)
       5696     624    1264    7584    1da0 git-show-index (after)

which is a whole lot better.

Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Signed-off-by: Junio C Hamano <gitster@pobox.com>

diff --git a/Makefile b/Makefile
index ad890ec9254617e2b4a6cfb35ec91b44ebd8f37a..a041b695611930ccef020a61291849b5a4b213b5 100644 (file)
--- a/Makefile
+++ b/Makefile
@@ -559,6 +559,7 @@ LIB_OBJS += graph.o
 LIB_OBJS += grep.o
 LIB_OBJS += hash.o
 LIB_OBJS += help.o
+LIB_OBJS += hex.o
 LIB_OBJS += ident.o
 LIB_OBJS += levenshtein.o
 LIB_OBJS += list-objects.o

diff --git a/hex.c b/hex.c
new file mode 100644 (file)
index 0000000..bb402fb
--- /dev/null
+++ b/hex.c
@@ -0,0 +1,67 @@
+#include "cache.h"
+
+const signed char hexval_table[256] = {
+        -1, -1, -1, -1, -1, -1, -1, -1,                /* 00-07 */
+        -1, -1, -1, -1, -1, -1, -1, -1,                /* 08-0f */
+        -1, -1, -1, -1, -1, -1, -1, -1,                /* 10-17 */
+        -1, -1, -1, -1, -1, -1, -1, -1,                /* 18-1f */
+        -1, -1, -1, -1, -1, -1, -1, -1,                /* 20-27 */
+        -1, -1, -1, -1, -1, -1, -1, -1,                /* 28-2f */
+         0,  1,  2,  3,  4,  5,  6,  7,                /* 30-37 */
+         8,  9, -1, -1, -1, -1, -1, -1,                /* 38-3f */
+        -1, 10, 11, 12, 13, 14, 15, -1,                /* 40-47 */
+        -1, -1, -1, -1, -1, -1, -1, -1,                /* 48-4f */
+        -1, -1, -1, -1, -1, -1, -1, -1,                /* 50-57 */
+        -1, -1, -1, -1, -1, -1, -1, -1,                /* 58-5f */
+        -1, 10, 11, 12, 13, 14, 15, -1,                /* 60-67 */
+        -1, -1, -1, -1, -1, -1, -1, -1,                /* 68-67 */
+        -1, -1, -1, -1, -1, -1, -1, -1,                /* 70-77 */
+        -1, -1, -1, -1, -1, -1, -1, -1,                /* 78-7f */
+        -1, -1, -1, -1, -1, -1, -1, -1,                /* 80-87 */
+        -1, -1, -1, -1, -1, -1, -1, -1,                /* 88-8f */
+        -1, -1, -1, -1, -1, -1, -1, -1,                /* 90-97 */
+        -1, -1, -1, -1, -1, -1, -1, -1,                /* 98-9f */
+        -1, -1, -1, -1, -1, -1, -1, -1,                /* a0-a7 */
+        -1, -1, -1, -1, -1, -1, -1, -1,                /* a8-af */
+        -1, -1, -1, -1, -1, -1, -1, -1,                /* b0-b7 */
+        -1, -1, -1, -1, -1, -1, -1, -1,                /* b8-bf */
+        -1, -1, -1, -1, -1, -1, -1, -1,                /* c0-c7 */
+        -1, -1, -1, -1, -1, -1, -1, -1,                /* c8-cf */
+        -1, -1, -1, -1, -1, -1, -1, -1,                /* d0-d7 */
+        -1, -1, -1, -1, -1, -1, -1, -1,                /* d8-df */
+        -1, -1, -1, -1, -1, -1, -1, -1,                /* e0-e7 */
+        -1, -1, -1, -1, -1, -1, -1, -1,                /* e8-ef */
+        -1, -1, -1, -1, -1, -1, -1, -1,                /* f0-f7 */
+        -1, -1, -1, -1, -1, -1, -1, -1,                /* f8-ff */
+};
+
+int get_sha1_hex(const char *hex, unsigned char *sha1)
+{
+       int i;
+       for (i = 0; i < 20; i++) {
+               unsigned int val = (hexval(hex[0]) << 4) | hexval(hex[1]);
+               if (val & ~0xff)
+                       return -1;
+               *sha1++ = val;
+               hex += 2;
+       }
+       return 0;
+}
+
+char *sha1_to_hex(const unsigned char *sha1)
+{
+       static int bufno;
+       static char hexbuffer[4][50];
+       static const char hex[] = "0123456789abcdef";
+       char *buffer = hexbuffer[3 & ++bufno], *buf = buffer;
+       int i;
+
+       for (i = 0; i < 20; i++) {
+               unsigned int val = *sha1++;
+               *buf++ = hex[val >> 4];
+               *buf++ = hex[val & 0xf];
+       }
+       *buf = '\0';
+
+       return buffer;
+}

diff --git a/sha1_file.c b/sha1_file.c
index 7086760dbedac89075f53ebbe1539b6ebbaa9b06..12478a3652cfbdcbe4b0199641320c94b7f3dfa5 100644 (file)
--- a/sha1_file.c
+++ b/sha1_file.c
@@ -35,54 +35,6 @@ static size_t sz_fmt(size_t s) { return s; }
 
 const unsigned char null_sha1[20];
 
-const signed char hexval_table[256] = {
-        -1, -1, -1, -1, -1, -1, -1, -1,                /* 00-07 */
-        -1, -1, -1, -1, -1, -1, -1, -1,                /* 08-0f */
-        -1, -1, -1, -1, -1, -1, -1, -1,                /* 10-17 */
-        -1, -1, -1, -1, -1, -1, -1, -1,                /* 18-1f */
-        -1, -1, -1, -1, -1, -1, -1, -1,                /* 20-27 */
-        -1, -1, -1, -1, -1, -1, -1, -1,                /* 28-2f */
-         0,  1,  2,  3,  4,  5,  6,  7,                /* 30-37 */
-         8,  9, -1, -1, -1, -1, -1, -1,                /* 38-3f */
-        -1, 10, 11, 12, 13, 14, 15, -1,                /* 40-47 */
-        -1, -1, -1, -1, -1, -1, -1, -1,                /* 48-4f */
-        -1, -1, -1, -1, -1, -1, -1, -1,                /* 50-57 */
-        -1, -1, -1, -1, -1, -1, -1, -1,                /* 58-5f */
-        -1, 10, 11, 12, 13, 14, 15, -1,                /* 60-67 */
-        -1, -1, -1, -1, -1, -1, -1, -1,                /* 68-67 */
-        -1, -1, -1, -1, -1, -1, -1, -1,                /* 70-77 */
-        -1, -1, -1, -1, -1, -1, -1, -1,                /* 78-7f */
-        -1, -1, -1, -1, -1, -1, -1, -1,                /* 80-87 */
-        -1, -1, -1, -1, -1, -1, -1, -1,                /* 88-8f */
-        -1, -1, -1, -1, -1, -1, -1, -1,                /* 90-97 */
-        -1, -1, -1, -1, -1, -1, -1, -1,                /* 98-9f */
-        -1, -1, -1, -1, -1, -1, -1, -1,                /* a0-a7 */
-        -1, -1, -1, -1, -1, -1, -1, -1,                /* a8-af */
-        -1, -1, -1, -1, -1, -1, -1, -1,                /* b0-b7 */
-        -1, -1, -1, -1, -1, -1, -1, -1,                /* b8-bf */
-        -1, -1, -1, -1, -1, -1, -1, -1,                /* c0-c7 */
-        -1, -1, -1, -1, -1, -1, -1, -1,                /* c8-cf */
-        -1, -1, -1, -1, -1, -1, -1, -1,                /* d0-d7 */
-        -1, -1, -1, -1, -1, -1, -1, -1,                /* d8-df */
-        -1, -1, -1, -1, -1, -1, -1, -1,                /* e0-e7 */
-        -1, -1, -1, -1, -1, -1, -1, -1,                /* e8-ef */
-        -1, -1, -1, -1, -1, -1, -1, -1,                /* f0-f7 */
-        -1, -1, -1, -1, -1, -1, -1, -1,                /* f8-ff */
-};
-
-int get_sha1_hex(const char *hex, unsigned char *sha1)
-{
-       int i;
-       for (i = 0; i < 20; i++) {
-               unsigned int val = (hexval(hex[0]) << 4) | hexval(hex[1]);
-               if (val & ~0xff)
-                       return -1;
-               *sha1++ = val;
-               hex += 2;
-       }
-       return 0;
-}
-
 static inline int offset_1st_component(const char *path)
 {
        if (has_dos_drive_prefix(path))
@@ -133,24 +85,6 @@ int safe_create_leading_directories_const(const char *path)
        return result;
 }
 
-char *sha1_to_hex(const unsigned char *sha1)
-{
-       static int bufno;
-       static char hexbuffer[4][50];
-       static const char hex[] = "0123456789abcdef";
-       char *buffer = hexbuffer[3 & ++bufno], *buf = buffer;
-       int i;
-
-       for (i = 0; i < 20; i++) {
-               unsigned int val = *sha1++;
-               *buf++ = hex[val >> 4];
-               *buf++ = hex[val & 0xf];
-       }
-       *buf = '\0';
-
-       return buffer;
-}
-
 static void fill_sha1_path(char *pathbuf, const unsigned char *sha1)
 {
        int i;

diff --git a/show-index.c b/show-index.c
index 63f9da53237d4233bede66a28e4bcf27d5b44af1..4c0ac138aff7b5add73e17fc9c3c4e409fd918e2 100644 (file)
--- a/show-index.c
+++ b/show-index.c
@@ -48,7 +48,7 @@ int main(int argc, char **argv)
                        unsigned char sha1[20];
                        uint32_t crc;
                        uint32_t off;
-               } *entries = xmalloc(nr * sizeof(entries[0]));
+               } *entries = malloc(nr * sizeof(entries[0]));
                for (i = 0; i < nr; i++)
                        if (fread(entries[i].sha1, 20, 1, stdin) != 1)
                                die("unable to read sha1 %u/%u", i, nr);