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Function stripspace now gets a buffer instead file descriptors.

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An implementation easier to call from builtins. It is designed
to be used from the upcoming builtin-tag.c and builtin-commit.c,
because both need to remove unwanted spaces from messages.

Signed-off-by: Carlos Rica <jasampler@gmail.com>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
This commit is contained in:
Carlos Rica 2007-07-11 20:50:34 +02:00 committed by Junio C Hamano
parent 73f8936050
commit 975e0daf5e
2 changed files with 38 additions and 25 deletions
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61
builtin-stripspace.c
View File

@ -2,12 +2,11 @@
#include "cache.h"
/*
* Remove trailing spaces from a line.
* Returns the length of a line, without trailing spaces.
*
* If the line ends with newline, it will be removed too.
* Returns the new length of the string.
*/
static int cleanup(char *line, int len)
static size_t cleanup(char *line, size_t len)
{
if (len) {
if (line[len - 1] == '\n')
@ -19,7 +18,6 @@ static int cleanup(char *line, int len)
break;
len--;
}
line[len] = 0;
}
return len;
}
@ -28,52 +26,67 @@ static int cleanup(char *line, int len)
* Remove empty lines from the beginning and end
* and also trailing spaces from every line.
*
* Note that the buffer will not be NUL-terminated.
*
* Turn multiple consecutive empty lines between paragraphs
* into just one empty line.
*
* If the input has only empty lines and spaces,
* no output will be produced.
*
* If last line has a newline at the end, it will be removed.
*
* Enable skip_comments to skip every line starting with "#".
*/
void stripspace(FILE *in, FILE *out, int skip_comments)
size_t stripspace(char *buffer, size_t length, int skip_comments)
{
int empties = -1;
int alloc = 1024;
char *line = xmalloc(alloc);
size_t i, j, len, newlen;
char *eol;
while (fgets(line, alloc, in)) {
int len = strlen(line);
for (i = j = 0; i < length; i += len, j += newlen) {
eol = memchr(buffer + i, '\n', length - i);
len = eol ? eol - (buffer + i) + 1 : length - i;
while (len == alloc - 1 && line[len - 1] != '\n') {
alloc = alloc_nr(alloc);
line = xrealloc(line, alloc);
fgets(line + len, alloc - len, in);
len += strlen(line + len);
}
if (skip_comments && line[0] == '#')
if (skip_comments && len && buffer[i] == '#') {
newlen = 0;
continue;
len = cleanup(line, len);
}
newlen = cleanup(buffer + i, len);
/* Not just an empty line? */
if (len) {
if (newlen) {
if (empties != -1)
buffer[j++] = '\n';
if (empties > 0)
fputc('\n', out);
buffer[j++] = '\n';
empties = 0;
fputs(line, out);
fputc('\n', out);
memmove(buffer + j, buffer + i, newlen);
continue;
}
if (empties < 0)
continue;
empties++;
}
free(line);
return j;
}
int cmd_stripspace(int argc, const char **argv, const char *prefix)
{
stripspace(stdin, stdout, 0);
char *buffer;
unsigned long size;
size = 1024;
buffer = xmalloc(size);
if (read_pipe(0, &buffer, &size))
die("could not read the input");
size = stripspace(buffer, size, 0);
write_or_die(1, buffer, size);
if (size)
putc('\n', stdout);
free(buffer);
return 0;
}

2
builtin.h
View File

@ -7,7 +7,7 @@ extern const char git_version_string[];
extern const char git_usage_string[];
extern void help_unknown_cmd(const char *cmd);
extern void stripspace(FILE *in, FILE *out, int skip_comments);
extern size_t stripspace(char *buffer, size_t length, int skip_comments);
extern int write_tree(unsigned char *sha1, int missing_ok, const char *prefix);
extern void prune_packed_objects(int);