mirror of
https://github.com/torvalds/linux.git
synced 2024-11-25 05:32:00 +00:00
407868deb2
Passing NULL to free() is allowed and is a no-op. Remove redundant NULL pointer checks. Signed-off-by: Masahiro Yamada <masahiroy@kernel.org>
129 lines
2.1 KiB
C
129 lines
2.1 KiB
C
// SPDX-License-Identifier: GPL-2.0
|
|
/*
|
|
* Copyright (C) 2002-2005 Roman Zippel <zippel@linux-m68k.org>
|
|
* Copyright (C) 2002-2005 Sam Ravnborg <sam@ravnborg.org>
|
|
*/
|
|
|
|
#include <stdarg.h>
|
|
#include <stdlib.h>
|
|
#include <string.h>
|
|
#include "lkc.h"
|
|
|
|
/* file already present in list? If not add it */
|
|
struct file *file_lookup(const char *name)
|
|
{
|
|
struct file *file;
|
|
|
|
for (file = file_list; file; file = file->next) {
|
|
if (!strcmp(name, file->name)) {
|
|
return file;
|
|
}
|
|
}
|
|
|
|
file = xmalloc(sizeof(*file));
|
|
memset(file, 0, sizeof(*file));
|
|
file->name = xstrdup(name);
|
|
file->next = file_list;
|
|
file_list = file;
|
|
return file;
|
|
}
|
|
|
|
/* Allocate initial growable string */
|
|
struct gstr str_new(void)
|
|
{
|
|
struct gstr gs;
|
|
gs.s = xmalloc(sizeof(char) * 64);
|
|
gs.len = 64;
|
|
gs.max_width = 0;
|
|
strcpy(gs.s, "\0");
|
|
return gs;
|
|
}
|
|
|
|
/* Free storage for growable string */
|
|
void str_free(struct gstr *gs)
|
|
{
|
|
free(gs->s);
|
|
gs->s = NULL;
|
|
gs->len = 0;
|
|
}
|
|
|
|
/* Append to growable string */
|
|
void str_append(struct gstr *gs, const char *s)
|
|
{
|
|
size_t l;
|
|
if (s) {
|
|
l = strlen(gs->s) + strlen(s) + 1;
|
|
if (l > gs->len) {
|
|
gs->s = xrealloc(gs->s, l);
|
|
gs->len = l;
|
|
}
|
|
strcat(gs->s, s);
|
|
}
|
|
}
|
|
|
|
/* Append printf formatted string to growable string */
|
|
void str_printf(struct gstr *gs, const char *fmt, ...)
|
|
{
|
|
va_list ap;
|
|
char s[10000]; /* big enough... */
|
|
va_start(ap, fmt);
|
|
vsnprintf(s, sizeof(s), fmt, ap);
|
|
str_append(gs, s);
|
|
va_end(ap);
|
|
}
|
|
|
|
/* Retrieve value of growable string */
|
|
char *str_get(struct gstr *gs)
|
|
{
|
|
return gs->s;
|
|
}
|
|
|
|
void *xmalloc(size_t size)
|
|
{
|
|
void *p = malloc(size);
|
|
if (p)
|
|
return p;
|
|
fprintf(stderr, "Out of memory.\n");
|
|
exit(1);
|
|
}
|
|
|
|
void *xcalloc(size_t nmemb, size_t size)
|
|
{
|
|
void *p = calloc(nmemb, size);
|
|
if (p)
|
|
return p;
|
|
fprintf(stderr, "Out of memory.\n");
|
|
exit(1);
|
|
}
|
|
|
|
void *xrealloc(void *p, size_t size)
|
|
{
|
|
p = realloc(p, size);
|
|
if (p)
|
|
return p;
|
|
fprintf(stderr, "Out of memory.\n");
|
|
exit(1);
|
|
}
|
|
|
|
char *xstrdup(const char *s)
|
|
{
|
|
char *p;
|
|
|
|
p = strdup(s);
|
|
if (p)
|
|
return p;
|
|
fprintf(stderr, "Out of memory.\n");
|
|
exit(1);
|
|
}
|
|
|
|
char *xstrndup(const char *s, size_t n)
|
|
{
|
|
char *p;
|
|
|
|
p = strndup(s, n);
|
|
if (p)
|
|
return p;
|
|
fprintf(stderr, "Out of memory.\n");
|
|
exit(1);
|
|
}
|