21666f1aae
We currently have two parallel notation for dealing with object types in the code: a string and a numerical value. One of them is obviously redundent, and the most used one requires more stack space and a bunch of strcmp() all over the place. This is an initial step for the removal of the version using a char array found in object reading code paths. The patch is unfortunately large but there is no sane way to split it in smaller parts without breaking the system. Signed-off-by: Nicolas Pitre <nico@cam.org> Signed-off-by: Junio C Hamano <junkio@cox.net>
139 lines
3.1 KiB
C
139 lines
3.1 KiB
C
/*
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* GIT - the stupid content tracker
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*
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* Copyright (c) Junio C Hamano, 2006
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*/
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#include "cache.h"
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#include "strbuf.h"
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#include "quote.h"
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#include "tree.h"
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static struct treeent {
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unsigned mode;
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unsigned char sha1[20];
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int len;
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char name[FLEX_ARRAY];
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} **entries;
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static int alloc, used;
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static void append_to_tree(unsigned mode, unsigned char *sha1, char *path)
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{
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struct treeent *ent;
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int len = strlen(path);
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if (strchr(path, '/'))
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die("path %s contains slash", path);
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if (alloc <= used) {
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alloc = alloc_nr(used);
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entries = xrealloc(entries, sizeof(*entries) * alloc);
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}
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ent = entries[used++] = xmalloc(sizeof(**entries) + len + 1);
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ent->mode = mode;
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ent->len = len;
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hashcpy(ent->sha1, sha1);
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memcpy(ent->name, path, len+1);
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}
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static int ent_compare(const void *a_, const void *b_)
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{
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struct treeent *a = *(struct treeent **)a_;
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struct treeent *b = *(struct treeent **)b_;
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return base_name_compare(a->name, a->len, a->mode,
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b->name, b->len, b->mode);
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}
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static void write_tree(unsigned char *sha1)
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{
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char *buffer;
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unsigned long size, offset;
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int i;
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qsort(entries, used, sizeof(*entries), ent_compare);
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for (size = i = 0; i < used; i++)
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size += 32 + entries[i]->len;
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buffer = xmalloc(size);
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offset = 0;
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for (i = 0; i < used; i++) {
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struct treeent *ent = entries[i];
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if (offset + ent->len + 100 < size) {
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size = alloc_nr(offset + ent->len + 100);
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buffer = xrealloc(buffer, size);
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}
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offset += sprintf(buffer + offset, "%o ", ent->mode);
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offset += sprintf(buffer + offset, "%s", ent->name);
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buffer[offset++] = 0;
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hashcpy((unsigned char*)buffer + offset, ent->sha1);
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offset += 20;
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}
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write_sha1_file(buffer, offset, tree_type, sha1);
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}
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static const char mktree_usage[] = "git-mktree [-z]";
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int main(int ac, char **av)
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{
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struct strbuf sb;
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unsigned char sha1[20];
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int line_termination = '\n';
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setup_git_directory();
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while ((1 < ac) && av[1][0] == '-') {
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char *arg = av[1];
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if (!strcmp("-z", arg))
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line_termination = 0;
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else
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usage(mktree_usage);
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ac--;
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av++;
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}
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strbuf_init(&sb);
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while (1) {
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int len;
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char *ptr, *ntr;
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unsigned mode;
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enum object_type type;
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char *path;
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read_line(&sb, stdin, line_termination);
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if (sb.eof)
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break;
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len = sb.len;
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ptr = sb.buf;
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/* Input is non-recursive ls-tree output format
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* mode SP type SP sha1 TAB name
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*/
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mode = strtoul(ptr, &ntr, 8);
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if (ptr == ntr || !ntr || *ntr != ' ')
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die("input format error: %s", sb.buf);
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ptr = ntr + 1; /* type */
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ntr = strchr(ptr, ' ');
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if (!ntr || sb.buf + len <= ntr + 41 ||
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ntr[41] != '\t' ||
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get_sha1_hex(ntr + 1, sha1))
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die("input format error: %s", sb.buf);
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type = sha1_object_info(sha1, NULL);
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if (type < 0)
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die("object %s unavailable", sha1_to_hex(sha1));
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*ntr++ = 0; /* now at the beginning of SHA1 */
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if (type != type_from_string(ptr))
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die("object type %s mismatch (%s)", ptr, typename(type));
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ntr += 41; /* at the beginning of name */
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if (line_termination && ntr[0] == '"')
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path = unquote_c_style(ntr, NULL);
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else
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path = ntr;
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append_to_tree(mode, sha1, path);
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if (path != ntr)
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free(path);
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}
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write_tree(sha1);
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puts(sha1_to_hex(sha1));
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exit(0);
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}
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