diff-format.txt: Combined diff format documentation supplement

diff --git a/convert-objects.c b/convert-objects.c
index 12aacef5a9c06adec2e7abb7c11051acc954225a..631678b08a7cb83b0349f1a683d3cd7fb797fb7a 100644 (file)
--- a/convert-objects.c
+++ b/convert-objects.c
@@ -1,5 +1,6 @@
 #define _XOPEN_SOURCE 500 /* glibc2 and AIX 5.3L need this */
 #define _XOPEN_SOURCE_EXTENDED 1 /* AIX 5.3L needs this */
+#define _GNU_SOURCE
 #include <time.h>
 #include "cache.h"
 #include "blob.h"
@@ -22,7 +23,7 @@ static struct entry * convert_entry(unsigned char *sha1);
 static struct entry *insert_new(unsigned char *sha1, int pos)
 {
        struct entry *new = xcalloc(1, sizeof(struct entry));
-       memcpy(new->old_sha1, sha1, 20);
+       hashcpy(new->old_sha1, sha1);
        memmove(convert + pos + 1, convert + pos, (nr_convert - pos) * sizeof(struct entry *));
        convert[pos] = new;
        nr_convert++;
@@ -38,7 +39,7 @@ static struct entry *lookup_entry(unsigned char *sha1)
        while (low < high) {
                int next = (low + high) / 2;
                struct entry *n = convert[next];
-               int cmp = memcmp(sha1, n->old_sha1, 20);
+               int cmp = hashcmp(sha1, n->old_sha1);
                if (!cmp)
                        return n;
                if (cmp < 0) {
@@ -53,7 +54,7 @@ static struct entry *lookup_entry(unsigned char *sha1)
 static void convert_binary_sha1(void *buffer)
 {
        struct entry *entry = convert_entry(buffer);
-       memcpy(buffer, entry->new_sha1, 20);
+       hashcpy(buffer, entry->new_sha1);
 }
 
 static void convert_ascii_sha1(void *buffer)
@@ -103,12 +104,12 @@ static int write_subdirectory(void *buffer, unsigned long size, const char *base
                if (!slash) {
                        newlen += sprintf(new + newlen, "%o %s", mode, path);
                        new[newlen++] = '\0';
-                       memcpy(new + newlen, buffer + len - 20, 20);
+                       hashcpy((unsigned char*)new + newlen, (unsigned char *) buffer + len - 20);
                        newlen += 20;
 
                        used += len;
                        size -= len;
-                       buffer += len;
+                       buffer = (char *) buffer + len;
                        continue;
                }
 
@@ -121,7 +122,7 @@ static int write_subdirectory(void *buffer, unsigned long size, const char *base
 
                used += len;
                size -= len;
-               buffer += len;
+               buffer = (char *) buffer + len;
        }
 
        write_sha1_file(new, newlen, tree_type, result_sha1);
@@ -137,13 +138,13 @@ static void convert_tree(void *buffer, unsigned long size, unsigned char *result
        while (size) {
                int len = 1+strlen(buffer);
 
-               convert_binary_sha1(buffer + len);
+               convert_binary_sha1((char *) buffer + len);
 
                len += 20;
                if (len > size)
                        die("corrupt tree object");
                size -= len;
-               buffer += len;
+               buffer = (char *) buffer + len;
        }
 
        write_subdirectory(orig_buffer, orig_size, "", 0, result_sha1);
@@ -240,27 +241,27 @@ static void convert_date(void *buffer, unsigned long size, unsigned char *result
 {
        char *new = xmalloc(size + 100);
        unsigned long newlen = 0;
-       
-       // "tree <sha1>\n"
+
+       /* "tree <sha1>\n" */
        memcpy(new + newlen, buffer, 46);
        newlen += 46;
-       buffer += 46;
+       buffer = (char *) buffer + 46;
        size -= 46;
 
-       // "parent <sha1>\n"
+       /* "parent <sha1>\n" */
        while (!memcmp(buffer, "parent ", 7)) {
                memcpy(new + newlen, buffer, 48);
                newlen += 48;
-               buffer += 48;
+               buffer = (char *) buffer + 48;
                size -= 48;
        }
 
-       // "author xyz <xyz> date"
+       /* "author xyz <xyz> date" */
        newlen += convert_date_line(new + newlen, &buffer, &size);
-       // "committer xyz <xyz> date"
+       /* "committer xyz <xyz> date" */
        newlen += convert_date_line(new + newlen, &buffer, &size);
 
-       // Rest
+       /* Rest */
        memcpy(new + newlen, buffer, size);
        newlen += size;
 
@@ -275,11 +276,11 @@ static void convert_commit(void *buffer, unsigned long size, unsigned char *resu
 
        if (memcmp(buffer, "tree ", 5))
                die("Bad commit '%s'", (char*) buffer);
-       convert_ascii_sha1(buffer+5);
-       buffer += 46;    /* "tree " + "hex sha1" + "\n" */
+       convert_ascii_sha1((char *) buffer + 5);
+       buffer = (char *) buffer + 46;    /* "tree " + "hex sha1" + "\n" */
        while (!memcmp(buffer, "parent ", 7)) {
-               convert_ascii_sha1(buffer+7);
-               buffer += 48;
+               convert_ascii_sha1((char *) buffer + 7);
+               buffer = (char *) buffer + 48;
        }
        convert_date(orig_buffer, orig_size, result_sha1);
 }
@@ -321,8 +322,10 @@ int main(int argc, char **argv)
 
        setup_git_directory();
 
-       if (argc != 2 || get_sha1(argv[1], sha1))
+       if (argc != 2)
                usage("git-convert-objects <sha1>");
+       if (get_sha1(argv[1], sha1))
+               die("Not a valid object name %s", argv[1]);
 
        entry = convert_entry(sha1);
        printf("new sha1: %s\n", sha1_to_hex(entry->new_sha1));