diff format documentation: describe raw combined diff format

diff --git a/builtin-cat-file.c b/builtin-cat-file.c
index 8ab136e981d4ba0ed43c6bd9a907c43fd12b8fcd..d61d3d5b74ae23bb1ab10b23f518fa7a85ac5481 100644 (file)
--- a/builtin-cat-file.c
+++ b/builtin-cat-file.c
@@ -9,24 +9,7 @@
 #include "tree.h"
 #include "builtin.h"
 
-static void flush_buffer(const char *buf, unsigned long size)
-{
-       while (size > 0) {
-               long ret = xwrite(1, buf, size);
-               if (ret < 0) {
-                       /* Ignore epipe */
-                       if (errno == EPIPE)
-                               break;
-                       die("git-cat-file: %s", strerror(errno));
-               } else if (!ret) {
-                       die("git-cat-file: disk full?");
-               }
-               size -= ret;
-               buf += ret;
-       }
-}
-
-static int pprint_tag(const unsigned char *sha1, const char *buf, unsigned long size)
+static void pprint_tag(const unsigned char *sha1, const char *buf, unsigned long size)
 {
        /* the parser in tag.c is useless here. */
        const char *endp = buf + size;
@@ -42,7 +25,7 @@ static int pprint_tag(const unsigned char *sha1, const char *buf, unsigned long
                        /* Found the tagger line.  Copy out the contents
                         * of the buffer so far.
                         */
-                       flush_buffer(buf, cp - buf);
+                       write_or_die(1, buf, cp - buf);
 
                        /*
                         * Do something intelligent, like pretty-printing
@@ -61,18 +44,18 @@ static int pprint_tag(const unsigned char *sha1, const char *buf, unsigned long
                                                sp++;
                                        if (sp == cp) {
                                                /* give up */
-                                               flush_buffer(tagger,
+                                               write_or_die(1, tagger,
                                                             cp - tagger);
                                                break;
                                        }
                                        while (sp < cp &&
                                               !('0' <= *sp && *sp <= '9'))
                                                sp++;
-                                       flush_buffer(tagger, sp - tagger);
+                                       write_or_die(1, tagger, sp - tagger);
                                        date = strtoul(sp, &ep, 10);
                                        tz = strtol(ep, NULL, 10);
-                                       sp = show_date(date, tz);
-                                       flush_buffer(sp, strlen(sp));
+                                       sp = show_date(date, tz, 0);
+                                       write_or_die(1, sp, strlen(sp));
                                        xwrite(1, "\n", 1);
                                        break;
                                }
@@ -90,19 +73,17 @@ static int pprint_tag(const unsigned char *sha1, const char *buf, unsigned long
         * remainder as is.
         */
        if (cp < endp)
-               flush_buffer(cp, endp - cp);
-       return 0;
+               write_or_die(1, cp, endp - cp);
 }
 
-int cmd_cat_file(int argc, const char **argv, char **envp)
+int cmd_cat_file(int argc, const char **argv, const char *prefix)
 {
        unsigned char sha1[20];
-       char type[20];
+       enum object_type type;
        void *buf;
        unsigned long size;
        int opt;
 
-       setup_git_directory();
        git_config(git_default_config);
        if (argc != 3)
                usage("git-cat-file [-t|-s|-e|-p|<type>] <sha1>");
@@ -119,14 +100,16 @@ int cmd_cat_file(int argc, const char **argv, char **envp)
        buf = NULL;
        switch (opt) {
        case 't':
-               if (!sha1_object_info(sha1, type, NULL)) {
-                       printf("%s\n", type);
+               type = sha1_object_info(sha1, NULL);
+               if (type > 0) {
+                       printf("%s\n", typename(type));
                        return 0;
                }
                break;
 
        case 's':
-               if (!sha1_object_info(sha1, type, &size)) {
+               type = sha1_object_info(sha1, &size);
+               if (type > 0) {
                        printf("%lu\n", size);
                        return 0;
                }
@@ -136,18 +119,21 @@ int cmd_cat_file(int argc, const char **argv, char **envp)
                return !has_sha1_file(sha1);
 
        case 'p':
-               if (sha1_object_info(sha1, type, NULL))
+               type = sha1_object_info(sha1, NULL);
+               if (type < 0)
                        die("Not a valid object name %s", argv[2]);
 
                /* custom pretty-print here */
-               if (!strcmp(type, tree_type))
-                       return execl_git_cmd("ls-tree", argv[2], NULL);
+               if (type == OBJ_TREE)
+                       return cmd_ls_tree(2, argv + 1, NULL);
 
-               buf = read_sha1_file(sha1, type, &size);
+               buf = read_sha1_file(sha1, &type, &size);
                if (!buf)
                        die("Cannot read object %s", argv[2]);
-               if (!strcmp(type, tag_type))
-                       return pprint_tag(sha1, buf, size);
+               if (type == OBJ_TAG) {
+                       pprint_tag(sha1, buf, size);
+                       return 0;
+               }
 
                /* otherwise just spit out the data */
                break;
@@ -162,6 +148,6 @@ int cmd_cat_file(int argc, const char **argv, char **envp)
        if (!buf)
                die("git-cat-file %s: bad file", argv[2]);
 
-       flush_buffer(buf, size);
+       write_or_die(1, buf, size);
        return 0;
 }