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patch: add support for -R. ~ +110 byte. By Pascal Bellard <pascal.bellard AT ads-lu.com>

Browse Source 
fbsplash: new applet by Michele Sanges <michele.sanges AT otomelara.it

function                                             old     new   delta
fbsplash_main                                          -    1525   +1525
fb_drawfullrectangle                                   -     118    +118
static.param_value                                     -     100    +100
packed_usage                                       23776   23872     +96
applet_names                                        1843    1852      +9
applet_main                                         1120    1124      +4
read_line_input                                     3156    3158      +2
applet_nameofs                                       560     562      +2
applet_install_loc                                   140     141      +1
------------------------------------------------------------------------------
(add/remove: 3/0 grow/shrink: 6/0 up/down: 1857/0)           Total: 1857 bytes
   text    data     bss     dec     hex filename
 799233     641    7380  807254   c5156 busybox_old
 801202     641    7380  809223   c5907 busybox_unstripped
This commit is contained in:
Denis Vlasenko
2008-03-26 13:32:30 +00:00
parent cc2965fd23
commit 08ec67bc62
7 changed files with 103 additions and 32 deletions
Download Patch File Download Diff File Expand all files Collapse all files

52
editors/patch.c
View File

@ -21,7 +21,7 @@
#include "libbb.h"
static unsigned copy_lines(FILE *src_stream, FILE *dest_stream, unsigned lines_count)
static unsigned copy_lines(FILE *src_stream, FILE *dst_stream, unsigned lines_count)
{
while (src_stream && lines_count) {
char *line;
@ -29,7 +29,7 @@ static unsigned copy_lines(FILE *src_stream, FILE *dest_stream, unsigned lines_c
if (line == NULL) {
break;
}
if (fputs(line, dest_stream) == EOF) {
if (fputs(line, dst_stream) == EOF) {
bb_perror_msg_and_die("error writing to new file");
}
free(line);
@ -73,12 +73,14 @@ int patch_main(int argc ATTRIBUTE_UNUSED, char **argv)
FILE *patch_file;
int patch_level;
int ret = 0;
char plus = '+';
xfunc_error_retval = 2;
{
const char *p = "-1";
const char *i = "-"; /* compat */
getopt32(argv, "p:i:", &p, &i);
if (getopt32(argv, "p:i:R", &p, &i) & 4)
plus = '-';
patch_level = xatoi(p); /* can be negative! */
patch_file = xfopen_stdin(i);
}
@ -91,8 +93,8 @@ int patch_main(int argc ATTRIBUTE_UNUSED, char **argv)
char *new_filename;
char *backup_filename;
unsigned src_cur_line = 1;
unsigned dest_cur_line = 0;
unsigned dest_beg_line;
unsigned dst_cur_line = 0;
unsigned dst_beg_line;
unsigned bad_hunk_count = 0;
unsigned hunk_count = 0;
smallint copy_trailing_lines_flag = 0;
@ -143,15 +145,26 @@ int patch_main(int argc ATTRIBUTE_UNUSED, char **argv)
unsigned src_beg_line;
unsigned hunk_offset_start;
unsigned src_last_line = 1;
unsigned dst_last_line = 1;
if ((sscanf(patch_line, "@@ -%d,%d +%d", &src_beg_line, &src_last_line, &dest_beg_line) != 3)
&& (sscanf(patch_line, "@@ -%d +%d", &src_beg_line, &dest_beg_line) != 2)
) { /* No more hunks for this file */
if ((sscanf(patch_line, "@@ -%d,%d +%d,%d", &src_beg_line, &src_last_line, &dst_beg_line, &dst_last_line) < 3)
&& (sscanf(patch_line, "@@ -%d +%d,%d", &src_beg_line, &dst_beg_line, &dst_last_line) < 2)
) {
/* No more hunks for this file */
break;
}
if (plus != '+') {
/* reverse patch */
unsigned tmp = src_last_line;
src_last_line = dst_last_line;
dst_last_line = tmp;
tmp = src_beg_line;
src_beg_line = dst_beg_line;
dst_beg_line = tmp;
}
hunk_count++;
if (src_beg_line && dest_beg_line) {
if (src_beg_line && dst_beg_line) {
/* Copy unmodified lines upto start of hunk */
/* src_beg_line will be 0 if it's a new file */
count = src_beg_line - src_cur_line;
@ -159,14 +172,15 @@ int patch_main(int argc ATTRIBUTE_UNUSED, char **argv)
bb_error_msg_and_die("bad src file");
}
src_cur_line += count;
dest_cur_line += count;
dst_cur_line += count;
copy_trailing_lines_flag = 1;
}
src_last_line += hunk_offset_start = src_cur_line;
dst_last_line += dst_cur_line;
while (1) {
free(patch_line);
patch_line = xmalloc_fgets(patch_file);
patch_line = xmalloc_fgets(patch_file);
if (patch_line == NULL)
break; /* EOF */
if ((*patch_line != '-') && (*patch_line != '+')
@ -174,7 +188,7 @@ int patch_main(int argc ATTRIBUTE_UNUSED, char **argv)
) {
break; /* End of hunk */
}
if (*patch_line != '+') { /* '-', ' ' or '\n' */
if (*patch_line != plus) { /* '-' or ' ' */
char *src_line = NULL;
if (src_cur_line == src_last_line)
break;
@ -184,7 +198,8 @@ int patch_main(int argc ATTRIBUTE_UNUSED, char **argv)
int diff = strcmp(src_line, patch_line + 1);
src_cur_line++;
free(src_line);
if (diff) src_line = NULL;
if (diff)
src_line = NULL;
}
}
if (!src_line) {
@ -192,12 +207,14 @@ int patch_main(int argc ATTRIBUTE_UNUSED, char **argv)
bad_hunk_count++;
break;
}
if (*patch_line == '-') {
if (*patch_line != ' ') { /* '-' */
continue;
}
}
if (dst_cur_line == dst_last_line)
break;
fputs(patch_line + 1, dst_stream);
dest_cur_line++;
dst_cur_line++;
} /* end of while loop handling one hunk */
} /* end of while loop handling one file */
@ -217,7 +234,7 @@ int patch_main(int argc ATTRIBUTE_UNUSED, char **argv)
if (backup_filename) {
unlink(backup_filename);
}
if ((dest_cur_line == 0) || (dest_beg_line == 0)) {
if ((dst_cur_line == 0) || (dst_beg_line == 0)) {
/* The new patched file is empty, remove it */
xunlink(new_filename);
// /* old_filename and new_filename may be the same file */
@ -228,8 +245,7 @@ int patch_main(int argc ATTRIBUTE_UNUSED, char **argv)
//free(old_filename);
free(new_filename);
} /* end of "while there are patch lines" */
quit:
quit:
/* 0 = SUCCESS
* 1 = Some hunks failed
* 2 = More serious problems (exited earlier)