Revision 6c2f207b2316149ee8dfaf026e4a869ff9ab42f7 authored by Shawn O. Pearce on 05 November 2006, 05:37:23 UTC, committed by Junio C Hamano on 05 November 2006, 07:48:36 UTC
At least one older version of the Solaris C compiler doesn't support the newer C99 style struct initializers. To allow Git to compile on those systems use an archive description struct which is easier to initialize without the C99 struct initializer syntax. Also since the archives array is not used by anyone other than archive.c we can make it static. Signed-off-by: Shawn O. Pearce <spearce@spearce.org> Signed-off-by: Junio C Hamano <junkio@cox.net>
1 parent af8ffbe
convert-objects.c
#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"
#include "commit.h"
#include "tree.h"
struct entry {
unsigned char old_sha1[20];
unsigned char new_sha1[20];
int converted;
};
#define MAXOBJECTS (1000000)
static struct entry *convert[MAXOBJECTS];
static int nr_convert;
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));
hashcpy(new->old_sha1, sha1);
memmove(convert + pos + 1, convert + pos, (nr_convert - pos) * sizeof(struct entry *));
convert[pos] = new;
nr_convert++;
if (nr_convert == MAXOBJECTS)
die("you're kidding me - hit maximum object limit");
return new;
}
static struct entry *lookup_entry(unsigned char *sha1)
{
int low = 0, high = nr_convert;
while (low < high) {
int next = (low + high) / 2;
struct entry *n = convert[next];
int cmp = hashcmp(sha1, n->old_sha1);
if (!cmp)
return n;
if (cmp < 0) {
high = next;
continue;
}
low = next+1;
}
return insert_new(sha1, low);
}
static void convert_binary_sha1(void *buffer)
{
struct entry *entry = convert_entry(buffer);
hashcpy(buffer, entry->new_sha1);
}
static void convert_ascii_sha1(void *buffer)
{
unsigned char sha1[20];
struct entry *entry;
if (get_sha1_hex(buffer, sha1))
die("expected sha1, got '%s'", (char*) buffer);
entry = convert_entry(sha1);
memcpy(buffer, sha1_to_hex(entry->new_sha1), 40);
}
static unsigned int convert_mode(unsigned int mode)
{
unsigned int newmode;
newmode = mode & S_IFMT;
if (S_ISREG(mode))
newmode |= (mode & 0100) ? 0755 : 0644;
return newmode;
}
static int write_subdirectory(void *buffer, unsigned long size, const char *base, int baselen, unsigned char *result_sha1)
{
char *new = xmalloc(size);
unsigned long newlen = 0;
unsigned long used;
used = 0;
while (size) {
int len = 21 + strlen(buffer);
char *path = strchr(buffer, ' ');
unsigned char *sha1;
unsigned int mode;
char *slash, *origpath;
if (!path || sscanf(buffer, "%o", &mode) != 1)
die("bad tree conversion");
mode = convert_mode(mode);
path++;
if (memcmp(path, base, baselen))
break;
origpath = path;
path += baselen;
slash = strchr(path, '/');
if (!slash) {
newlen += sprintf(new + newlen, "%o %s", mode, path);
new[newlen++] = '\0';
hashcpy((unsigned char*)new + newlen, (unsigned char *) buffer + len - 20);
newlen += 20;
used += len;
size -= len;
buffer = (char *) buffer + len;
continue;
}
newlen += sprintf(new + newlen, "%o %.*s", S_IFDIR, (int)(slash - path), path);
new[newlen++] = 0;
sha1 = (unsigned char *)(new + newlen);
newlen += 20;
len = write_subdirectory(buffer, size, origpath, slash-origpath+1, sha1);
used += len;
size -= len;
buffer = (char *) buffer + len;
}
write_sha1_file(new, newlen, tree_type, result_sha1);
free(new);
return used;
}
static void convert_tree(void *buffer, unsigned long size, unsigned char *result_sha1)
{
void *orig_buffer = buffer;
unsigned long orig_size = size;
while (size) {
int len = 1+strlen(buffer);
convert_binary_sha1((char *) buffer + len);
len += 20;
if (len > size)
die("corrupt tree object");
size -= len;
buffer = (char *) buffer + len;
}
write_subdirectory(orig_buffer, orig_size, "", 0, result_sha1);
}
static unsigned long parse_oldstyle_date(const char *buf)
{
char c, *p;
char buffer[100];
struct tm tm;
const char *formats[] = {
"%c",
"%a %b %d %T",
"%Z",
"%Y",
" %Y",
NULL
};
/* We only ever did two timezones in the bad old format .. */
const char *timezones[] = {
"PDT", "PST", "CEST", NULL
};
const char **fmt = formats;
p = buffer;
while (isspace(c = *buf))
buf++;
while ((c = *buf++) != '\n')
*p++ = c;
*p++ = 0;
buf = buffer;
memset(&tm, 0, sizeof(tm));
do {
const char *next = strptime(buf, *fmt, &tm);
if (next) {
if (!*next)
return mktime(&tm);
buf = next;
} else {
const char **p = timezones;
while (isspace(*buf))
buf++;
while (*p) {
if (!memcmp(buf, *p, strlen(*p))) {
buf += strlen(*p);
break;
}
p++;
}
}
fmt++;
} while (*buf && *fmt);
printf("left: %s\n", buf);
return mktime(&tm);
}
static int convert_date_line(char *dst, void **buf, unsigned long *sp)
{
unsigned long size = *sp;
char *line = *buf;
char *next = strchr(line, '\n');
char *date = strchr(line, '>');
int len;
if (!next || !date)
die("missing or bad author/committer line %s", line);
next++; date += 2;
*buf = next;
*sp = size - (next - line);
len = date - line;
memcpy(dst, line, len);
dst += len;
/* Is it already in new format? */
if (isdigit(*date)) {
int datelen = next - date;
memcpy(dst, date, datelen);
return len + datelen;
}
/*
* Hacky hacky: one of the sparse old-style commits does not have
* any date at all, but we can fake it by using the committer date.
*/
if (*date == '\n' && strchr(next, '>'))
date = strchr(next, '>')+2;
return len + sprintf(dst, "%lu -0700\n", parse_oldstyle_date(date));
}
static void convert_date(void *buffer, unsigned long size, unsigned char *result_sha1)
{
char *new = xmalloc(size + 100);
unsigned long newlen = 0;
/* "tree <sha1>\n" */
memcpy(new + newlen, buffer, 46);
newlen += 46;
buffer = (char *) buffer + 46;
size -= 46;
/* "parent <sha1>\n" */
while (!memcmp(buffer, "parent ", 7)) {
memcpy(new + newlen, buffer, 48);
newlen += 48;
buffer = (char *) buffer + 48;
size -= 48;
}
/* "author xyz <xyz> date" */
newlen += convert_date_line(new + newlen, &buffer, &size);
/* "committer xyz <xyz> date" */
newlen += convert_date_line(new + newlen, &buffer, &size);
/* Rest */
memcpy(new + newlen, buffer, size);
newlen += size;
write_sha1_file(new, newlen, commit_type, result_sha1);
free(new);
}
static void convert_commit(void *buffer, unsigned long size, unsigned char *result_sha1)
{
void *orig_buffer = buffer;
unsigned long orig_size = size;
if (memcmp(buffer, "tree ", 5))
die("Bad commit '%s'", (char*) buffer);
convert_ascii_sha1((char *) buffer + 5);
buffer = (char *) buffer + 46; /* "tree " + "hex sha1" + "\n" */
while (!memcmp(buffer, "parent ", 7)) {
convert_ascii_sha1((char *) buffer + 7);
buffer = (char *) buffer + 48;
}
convert_date(orig_buffer, orig_size, result_sha1);
}
static struct entry * convert_entry(unsigned char *sha1)
{
struct entry *entry = lookup_entry(sha1);
char type[20];
void *buffer, *data;
unsigned long size;
if (entry->converted)
return entry;
data = read_sha1_file(sha1, type, &size);
if (!data)
die("unable to read object %s", sha1_to_hex(sha1));
buffer = xmalloc(size);
memcpy(buffer, data, size);
if (!strcmp(type, blob_type)) {
write_sha1_file(buffer, size, blob_type, entry->new_sha1);
} else if (!strcmp(type, tree_type))
convert_tree(buffer, size, entry->new_sha1);
else if (!strcmp(type, commit_type))
convert_commit(buffer, size, entry->new_sha1);
else
die("unknown object type '%s' in %s", type, sha1_to_hex(sha1));
entry->converted = 1;
free(buffer);
free(data);
return entry;
}
int main(int argc, char **argv)
{
unsigned char sha1[20];
struct entry *entry;
setup_git_directory();
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));
return 0;
}
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