Revision 3adab6f3a7793253b22a4a7aae34221d19e0236a authored by Junio C Hamano on 09 February 2012, 21:30:52 UTC, committed by Junio C Hamano on 09 February 2012, 21:30:52 UTC
When the user explicitly asked us not to, don't launch an editor. But do everything else the same way as the "edit" case, i.e. leave the comment with verification result in the log template and record the mergesig in the resulting merge commit for later inspection. Based on initiail analysis by Jonathan Nieder. Signed-off-by: Junio C Hamano <gitster@pobox.com>
1 parent b5c9f1c
patch-delta.c
/*
* patch-delta.c:
* recreate a buffer from a source and the delta produced by diff-delta.c
*
* (C) 2005 Nicolas Pitre <nico@fluxnic.net>
*
* This code is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License version 2 as
* published by the Free Software Foundation.
*/
#include "git-compat-util.h"
#include "delta.h"
void *patch_delta(const void *src_buf, unsigned long src_size,
const void *delta_buf, unsigned long delta_size,
unsigned long *dst_size)
{
const unsigned char *data, *top;
unsigned char *dst_buf, *out, cmd;
unsigned long size;
if (delta_size < DELTA_SIZE_MIN)
return NULL;
data = delta_buf;
top = (const unsigned char *) delta_buf + delta_size;
/* make sure the orig file size matches what we expect */
size = get_delta_hdr_size(&data, top);
if (size != src_size)
return NULL;
/* now the result size */
size = get_delta_hdr_size(&data, top);
dst_buf = xmallocz(size);
out = dst_buf;
while (data < top) {
cmd = *data++;
if (cmd & 0x80) {
unsigned long cp_off = 0, cp_size = 0;
if (cmd & 0x01) cp_off = *data++;
if (cmd & 0x02) cp_off |= (*data++ << 8);
if (cmd & 0x04) cp_off |= (*data++ << 16);
if (cmd & 0x08) cp_off |= ((unsigned) *data++ << 24);
if (cmd & 0x10) cp_size = *data++;
if (cmd & 0x20) cp_size |= (*data++ << 8);
if (cmd & 0x40) cp_size |= (*data++ << 16);
if (cp_size == 0) cp_size = 0x10000;
if (unsigned_add_overflows(cp_off, cp_size) ||
cp_off + cp_size > src_size ||
cp_size > size)
break;
memcpy(out, (char *) src_buf + cp_off, cp_size);
out += cp_size;
size -= cp_size;
} else if (cmd) {
if (cmd > size)
break;
memcpy(out, data, cmd);
out += cmd;
data += cmd;
size -= cmd;
} else {
/*
* cmd == 0 is reserved for future encoding
* extensions. In the mean time we must fail when
* encountering them (might be data corruption).
*/
error("unexpected delta opcode 0");
goto bad;
}
}
/* sanity check */
if (data != top || size != 0) {
error("delta replay has gone wild");
bad:
free(dst_buf);
return NULL;
}
*dst_size = out - dst_buf;
return dst_buf;
}
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