busybox/libbb/xfuncs.c
Rob Landley 552b56dfd1 Not quite compiler independent, but we've never tried to be gcc independent
anyway.  This is at least less ugly than what was there before, and fixes
building all sources at once.
2006-05-04 21:22:27 +00:00

194 lines
3.1 KiB
C

/* vi: set sw=4 ts=4: */
/*
* Utility routines.
*
* Copyright (C) 1999-2004 by Erik Andersen <andersen@codepoet.org>
*
* Licensed under GPLv2 or later, see file LICENSE in this tarball for details.
*/
#include <sys/types.h>
#include <sys/stat.h>
#include <stdio.h>
#include <string.h>
#include <stdlib.h>
#include <unistd.h>
#include <fcntl.h>
#include "busybox.h"
#ifndef DMALLOC
#ifdef L_xmalloc
void *xmalloc(size_t size)
{
void *ptr = malloc(size);
if (ptr == NULL && size != 0)
bb_error_msg_and_die(bb_msg_memory_exhausted);
return ptr;
}
#endif
#ifdef L_xrealloc
void *xrealloc(void *ptr, size_t size)
{
ptr = realloc(ptr, size);
if (ptr == NULL && size != 0)
bb_error_msg_and_die(bb_msg_memory_exhausted);
return ptr;
}
#endif
#ifdef L_xcalloc
void *xcalloc(size_t nmemb, size_t size)
{
void *ptr = calloc(nmemb, size);
if (ptr == NULL && nmemb != 0 && size != 0)
bb_error_msg_and_die(bb_msg_memory_exhausted);
return ptr;
}
#endif
#endif /* DMALLOC */
#ifdef L_xstrdup
char * bb_xstrdup (const char *s)
{
char *t;
if (s == NULL)
return NULL;
t = strdup (s);
if (t == NULL)
bb_error_msg_and_die(bb_msg_memory_exhausted);
return t;
}
#endif
#ifdef L_xstrndup
char * bb_xstrndup (const char *s, int n)
{
char *t;
if (s == NULL)
bb_error_msg_and_die("bb_xstrndup bug");
t = xmalloc(++n);
return safe_strncpy(t,s,n);
}
#endif
#ifdef L_xfopen
FILE *bb_xfopen(const char *path, const char *mode)
{
FILE *fp;
if ((fp = fopen(path, mode)) == NULL)
bb_perror_msg_and_die("%s", path);
return fp;
}
#endif
#ifdef L_xopen
int bb_xopen(const char *pathname, int flags)
{
return bb_xopen3(pathname, flags, 0777);
}
#endif
#ifdef L_xopen3
int bb_xopen3(const char *pathname, int flags, int mode)
{
int ret;
ret = open(pathname, flags, mode);
if (ret < 0) {
bb_perror_msg_and_die("%s", pathname);
}
return ret;
}
#endif
#ifdef L_xread
ssize_t bb_xread(int fd, void *buf, size_t count)
{
ssize_t size;
size = read(fd, buf, count);
if (size < 0) {
bb_perror_msg_and_die(bb_msg_read_error);
}
return(size);
}
#endif
#ifdef L_xread_all
void bb_xread_all(int fd, void *buf, size_t count)
{
ssize_t size;
while (count) {
if ((size = bb_xread(fd, buf, count)) == 0) { /* EOF */
bb_error_msg_and_die("Short read");
}
count -= size;
buf = ((char *) buf) + size;
}
return;
}
#endif
#ifdef L_xread_char
unsigned char bb_xread_char(int fd)
{
char tmp;
bb_xread_all(fd, &tmp, 1);
return(tmp);
}
#endif
#ifdef L_xferror
void bb_xferror(FILE *fp, const char *fn)
{
if (ferror(fp)) {
bb_error_msg_and_die("%s", fn);
}
}
#endif
#ifdef L_xferror_stdout
void bb_xferror_stdout(void)
{
bb_xferror(stdout, bb_msg_standard_output);
}
#endif
#ifdef L_xfflush_stdout
void bb_xfflush_stdout(void)
{
if (fflush(stdout)) {
bb_perror_msg_and_die(bb_msg_standard_output);
}
}
#endif
// GCC forces inlining of strlen everywhere, which is generally a byte
// larger than calling a function, and it's called a lot so it adds up.
#ifdef L_strlen
size_t bb_strlen(const char *string)
{
return(__builtin_strlen(string));
}
#endif
/* END CODE */
/*
Local Variables:
c-file-style: "linux"
c-basic-offset: 4
tab-width: 4
End:
*/