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git/builtin-stripspace.c
Junio C Hamano 85023577a8 simplify inclusion of system header files.
This is a mechanical clean-up of the way *.c files include
system header files.

 (1) sources under compat/, platform sha-1 implementations, and
     xdelta code are exempt from the following rules;

 (2) the first #include must be "git-compat-util.h" or one of
     our own header file that includes it first (e.g. config.h,
     builtin.h, pkt-line.h);

 (3) system headers that are included in "git-compat-util.h"
     need not be included in individual C source files.

 (4) "git-compat-util.h" does not have to include subsystem
     specific header files (e.g. expat.h).

Signed-off-by: Junio C Hamano <junkio@cox.net>
2006-12-20 09:51:35 -08:00

58 lines
1,012 B
C

#include "builtin.h"
/*
* Remove empty lines from the beginning and end.
*
* Turn multiple consecutive empty lines into just one
* empty line. Return true if it is an incomplete line.
*/
static int cleanup(char *line)
{
int len = strlen(line);
if (len && line[len-1] == '\n') {
if (len == 1)
return 0;
do {
unsigned char c = line[len-2];
if (!isspace(c))
break;
line[len-2] = '\n';
len--;
line[len] = 0;
} while (len > 1);
return 0;
}
return 1;
}
void stripspace(FILE *in, FILE *out)
{
int empties = -1;
int incomplete = 0;
char line[1024];
while (fgets(line, sizeof(line), in)) {
incomplete = cleanup(line);
/* Not just an empty line? */
if (line[0] != '\n') {
if (empties > 0)
fputc('\n', out);
empties = 0;
fputs(line, out);
continue;
}
if (empties < 0)
continue;
empties++;
}
if (incomplete)
fputc('\n', out);
}
int cmd_stripspace(int argc, const char **argv, const char *prefix)
{
stripspace(stdin, stdout);
return 0;
}