libpayload update
* rework Config.in * add string_to_args function to actually make getopt usable. * add strchr * add strlcat * some malloc fixes (exposed by the USB stack) * add malloc debugging (thanks to Matthias Krause from Secunet!) * make LAR support optional, it's not really used anymore * (define htoX macros for ppc) Signed-off-by: Stefan Reinauer <stepan@coresystems.de> Acked-by: Joseph Smith <joe@settoplinux.org> git-svn-id: svn://svn.coreboot.org/coreboot/trunk@5298 2b7e53f0-3cfb-0310-b3e9-8179ed1497e1
This commit is contained in:
Stefan Reinauer
Stefan Reinauer
parent
516a2a7bfa
commit
e5d30b78b7
|
|
@ -30,6 +30,31 @@
|
|||
|
||||
mainmenu "Libpayload Configuration"
|
||||
|
||||
menu "Generic Options"
|
||||
|
||||
config EXPERIMENTAL
|
||||
bool "Experimental Options"
|
||||
default n
|
||||
help
|
||||
Prompt for experimental functionality. Attention: This is not likely
|
||||
to work without problems
|
||||
|
||||
config OBSOLETE
|
||||
bool "Obsolete Options"
|
||||
default n
|
||||
help
|
||||
Prompt for obsolete options. These options are for old, unsupported
|
||||
features and are likely to go away in the future.
|
||||
|
||||
config DEVELOPER
|
||||
bool "Developer Options"
|
||||
default n
|
||||
help
|
||||
Prompt for developer options. These options are only interesting for
|
||||
libpayload developers.
|
||||
|
||||
endmenu
|
||||
|
||||
menu "Architecture Options"
|
||||
|
||||
choice
|
||||
|
|
@ -65,6 +90,18 @@ config TINYCURSES
|
|||
bool "Enable tinycurses support"
|
||||
default y
|
||||
|
||||
config LAR
|
||||
bool "LAR support"
|
||||
default n
|
||||
depends on OBSOLETE
|
||||
help
|
||||
LAR is the archive format of (obsolete) coreboot v3
|
||||
|
||||
config CBFS
|
||||
bool "CBFS support"
|
||||
default y
|
||||
help
|
||||
CBFS is the archive format of (obsolete) coreboot v3
|
||||
endmenu
|
||||
|
||||
menu "Console Options"
|
||||
|
|
@ -197,19 +234,52 @@ config USB_EHCI
|
|||
NOTE: This option is not (fully) implemented yet
|
||||
|
||||
config USB_HID
|
||||
bool "Support for USB keyboards (broken)"
|
||||
bool "Support for USB keyboards"
|
||||
depends on USB
|
||||
default n
|
||||
default y
|
||||
help
|
||||
Select this option if you want to use devices complying to the
|
||||
USB HID (Human Interface Device) standard. Such devices are for
|
||||
example keyboards and mice. Currently only keyboards are supported.
|
||||
Say Y here unless you know exactly what you are doing.
|
||||
|
||||
config USB_HUB
|
||||
bool "Support for USB hubs (broken)"
|
||||
bool "Support for USB hubs"
|
||||
depends on USB
|
||||
default n
|
||||
default y
|
||||
help
|
||||
Select this option if you want to compile in support for USB hubs.
|
||||
Say Y here unless you know exactly what you are doing.
|
||||
|
||||
config USB_MSC
|
||||
bool "Support for USB storage"
|
||||
depends on USB
|
||||
|
||||
default y
|
||||
help
|
||||
Select this option if you want to compile in support for USB mass
|
||||
storage devices (USB memory sticks, hard drives, CDROM/DVD drives)
|
||||
Say Y here unless you know exactly what you are doing.
|
||||
|
||||
endmenu
|
||||
|
||||
menu "Debugging"
|
||||
depends on DEVELOPER
|
||||
|
||||
config DEBUG_MALLOC
|
||||
bool "Debug memory allocator"
|
||||
depends on USB
|
||||
default n
|
||||
help
|
||||
Select this option if you want to debug the memory allocator. This
|
||||
option logs all uses of the following functions:
|
||||
|
||||
void free(void *ptr);
|
||||
void *malloc(size_t size);
|
||||
void *calloc(size_t nmemb, size_t size);
|
||||
void *realloc(void *ptr, size_t size);
|
||||
void *memalign(size_t align, size_t size);
|
||||
|
||||
Say N here unless you are debugging memory allocator problems.
|
||||
|
||||
endmenu
|
||||
|
||||
|
|
|
|||
|
|
@ -75,4 +75,9 @@ extern char *suboptarg; /* getsubopt(3) external variable */
|
|||
#endif
|
||||
//__END_DECLS
|
||||
|
||||
#define MAX_ARGS 16
|
||||
extern char *string_argv[MAX_ARGS];
|
||||
extern int string_argc;
|
||||
int string_to_args(char *caller, char *string);
|
||||
|
||||
#endif /* !_GETOPT_H_ */
|
||||
|
|
|
|||
|
|
@ -43,14 +43,17 @@
|
|||
#ifndef _LIBPAYLOAD_H
|
||||
#define _LIBPAYLOAD_H
|
||||
|
||||
#include <libpayload-config.h>
|
||||
#include <stddef.h>
|
||||
#include <arch/types.h>
|
||||
#include <arch/io.h>
|
||||
#include <arch/virtual.h>
|
||||
#include <sysinfo.h>
|
||||
#include <stdarg.h>
|
||||
#include <lar.h>
|
||||
#include <pci.h>
|
||||
#ifdef CONFIG_LAR
|
||||
#include <lar.h>
|
||||
#endif
|
||||
|
||||
#define MIN(a,b) ((a) < (b) ? (a) : (b))
|
||||
#define MAX(a,b) ((a) > (b) ? (a) : (b))
|
||||
|
|
@ -253,11 +256,82 @@ unsigned short ipchksum(const void *ptr, unsigned long nbytes);
|
|||
* @defgroup malloc Memory allocation functions
|
||||
* @{
|
||||
*/
|
||||
#if defined(CONFIG_DEBUG_MALLOC) && !defined(IN_MALLOC_C)
|
||||
#define free(p) \
|
||||
({ \
|
||||
extern void print_malloc_map(void); \
|
||||
extern void free(void *); \
|
||||
printf("free(%p) called from %s:%s:%d...\n", p, __FILE__, __func__, \
|
||||
__LINE__);\
|
||||
printf("PRE free()\n"); \
|
||||
print_malloc_map(); \
|
||||
free(p); \
|
||||
printf("POST free()\n"); \
|
||||
print_malloc_map(); \
|
||||
})
|
||||
#define malloc(s) \
|
||||
({ \
|
||||
extern void print_malloc_map(void); \
|
||||
extern void *malloc(size_t); \
|
||||
void *ptr; \
|
||||
printf("malloc(%u) called from %s:%s:%d...\n", s, __FILE__, __func__, \
|
||||
__LINE__);\
|
||||
printf("PRE malloc\n"); \
|
||||
print_malloc_map(); \
|
||||
ptr = malloc(s); \
|
||||
printf("POST malloc (ptr = %p)\n", ptr); \
|
||||
print_malloc_map(); \
|
||||
ptr; \
|
||||
})
|
||||
#define calloc(n,s) \
|
||||
({ \
|
||||
extern void print_malloc_map(void); \
|
||||
extern void *calloc(size_t,size_t); \
|
||||
void *ptr; \
|
||||
printf("calloc(%u, %u) called from %s:%s:%d...\n", n, s, __FILE__, \
|
||||
__func__, __LINE__);\
|
||||
printf("PRE calloc\n"); \
|
||||
print_malloc_map(); \
|
||||
ptr = calloc(n,s); \
|
||||
printf("POST calloc (ptr = %p)\n", ptr); \
|
||||
print_malloc_map(); \
|
||||
ptr; \
|
||||
})
|
||||
#define realloc(p,s) \
|
||||
({ \
|
||||
extern void print_malloc_map(void); \
|
||||
extern void *realloc(void*,size_t); \
|
||||
void *ptr; \
|
||||
printf("realloc(%p, %u) called from %s:%s:%d...\n", p, s, __FILE__, \
|
||||
__func__, __LINE__);\
|
||||
printf("PRE realloc\n"); \
|
||||
print_malloc_map(); \
|
||||
ptr = realloc(p,s); \
|
||||
printf("POST realloc (ptr = %p)\n", ptr); \
|
||||
print_malloc_map(); \
|
||||
ptr; \
|
||||
})
|
||||
#define memalign(a,s) \
|
||||
({ \
|
||||
extern void print_malloc_map(void); \
|
||||
extern void *memalign(size_t, size_t); \
|
||||
void *ptr; \
|
||||
printf("memalign(%u, %u) called from %s:%s:%d...\n", a, s, __FILE__, \
|
||||
__func__, __LINE__);\
|
||||
printf("PRE memalign\n"); \
|
||||
print_malloc_map(); \
|
||||
ptr = memalign(a,s); \
|
||||
printf("POST realloc (ptr = %p)\n", ptr); \
|
||||
print_malloc_map(); \
|
||||
ptr; \
|
||||
})
|
||||
#else
|
||||
void free(void *ptr);
|
||||
void *malloc(size_t size);
|
||||
void *calloc(size_t nmemb, size_t size);
|
||||
void *realloc(void *ptr, size_t size);
|
||||
void *memalign(size_t align, size_t size);
|
||||
#endif
|
||||
/** @} */
|
||||
|
||||
/**
|
||||
|
|
@ -341,7 +415,9 @@ int strncmp(const char *s1, const char *s2, size_t maxlen);
|
|||
char *strncpy(char *d, const char *s, size_t n);
|
||||
char *strcpy(char *d, const char *s);
|
||||
char *strncat(char *d, const char *s, size_t n);
|
||||
size_t strlcat(char *d, const char *s, size_t n);
|
||||
char *strchr(const char *s, int c);
|
||||
char *strrchr(const char *s, int c);
|
||||
char *strdup(const char *s);
|
||||
char *strstr(const char *h, const char *n);
|
||||
char *strsep(char **stringp, const char *delim);
|
||||
|
|
@ -363,6 +439,7 @@ struct timeval {
|
|||
int gettimeofday(struct timeval *tv, void *tz);
|
||||
/** @} */
|
||||
|
||||
#ifdef CONFIG_LAR
|
||||
/**
|
||||
* @defgroup lar LAR functions
|
||||
* @{
|
||||
|
|
@ -421,6 +498,7 @@ int lfread(void *ptr, size_t size, size_t nmemb, struct LFILE *stream);
|
|||
int lfseek(struct LFILE *stream, long offset, int whence);
|
||||
int lfclose(struct LFILE *file);
|
||||
/** @} */
|
||||
#endif
|
||||
|
||||
/**
|
||||
* @defgroup info System information functions
|
||||
|
|
|
|||
|
|
@ -38,4 +38,8 @@
|
|||
|
||||
#define ntohll(in) (in)
|
||||
|
||||
#define htonw(in) ntohw(in)
|
||||
#define htonl(in) ntohw(in)
|
||||
#define htonll(in) ntohll(in)
|
||||
|
||||
#endif
|
||||
|
|
|
|||
|
|
@ -30,5 +30,10 @@
|
|||
|
||||
TARGETS-$(CONFIG_LIBC) += libc/malloc.o libc/printf.o libc/console.o libc/string.o
|
||||
TARGETS-$(CONFIG_LIBC) += libc/memory.o libc/ctype.o libc/ipchecksum.o libc/lib.o
|
||||
TARGETS-$(CONFIG_LIBC) += libc/rand.o libc/time.o libc/lar.o libc/exec.o
|
||||
TARGETS-$(CONFIG_LIBC) += libc/rand.o libc/time.o libc/exec.o
|
||||
TARGETS-$(CONFIG_LIBC) += libc/readline.o libc/getopt_long.o libc/sysinfo.o
|
||||
TARGETS-$(CONFIG_LIBC) += libc/args.o
|
||||
|
||||
# should be moved to coreboot directory
|
||||
TARGETS-$(CONFIG_LAR) += libc/lar.o
|
||||
#TARGETS-$(CONFIG_CBFS) += libc/cbfs.o
|
||||
|
|
|
|||
|
|
@ -0,0 +1,88 @@
|
|||
/*
|
||||
* This file is part of the libpayload project.
|
||||
*
|
||||
* Copyright (C) 2008 coresystems GmbH
|
||||
*
|
||||
* Redistribution and use in source and binary forms, with or without
|
||||
* modification, are permitted provided that the following conditions
|
||||
* are met:
|
||||
* 1. Redistributions of source code must retain the above copyright
|
||||
* notice, this list of conditions and the following disclaimer.
|
||||
* 2. Redistributions in binary form must reproduce the above copyright
|
||||
* notice, this list of conditions and the following disclaimer in the
|
||||
* documentation and/or other materials provided with the distribution.
|
||||
* 3. The name of the author may not be used to endorse or promote products
|
||||
* derived from this software without specific prior written permission.
|
||||
*
|
||||
* THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
|
||||
* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
|
||||
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
|
||||
* ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
|
||||
* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
|
||||
* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
|
||||
* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
|
||||
* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
|
||||
* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
|
||||
* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
|
||||
* SUCH DAMAGE.
|
||||
*/
|
||||
|
||||
/**
|
||||
* @file libc/readline.c
|
||||
* Simple readline implementation
|
||||
*/
|
||||
|
||||
#include <libpayload.h>
|
||||
#include <getopt.h>
|
||||
|
||||
/* We don't want to waste malloc on this, so we live with a small
|
||||
* fixed size array
|
||||
*/
|
||||
char *string_argv[MAX_ARGS];
|
||||
int string_argc;
|
||||
|
||||
/**
|
||||
* Take a string and make char *argv[] and int argc from it.
|
||||
*
|
||||
* This function allows the user to use getopt on an arbitrary string.
|
||||
*
|
||||
* global variables valid after a successful run of string_to_args():
|
||||
* string_argc pointer to number of arguments
|
||||
* string_argv pointer to argument list.
|
||||
*
|
||||
* @param caller to be used as argv[0] (may be NULL to ignore)
|
||||
* @param string to process
|
||||
* @return 0 if no error occured.
|
||||
*/
|
||||
int string_to_args(char *caller, char *string)
|
||||
{
|
||||
int i = 0;
|
||||
|
||||
if (caller)
|
||||
string_argv[i++] = caller;
|
||||
|
||||
if (*string)
|
||||
string_argv[i++] = string;
|
||||
|
||||
/* Terminate if the string ends */
|
||||
while (string && *string) {
|
||||
/* whitespace occured? */
|
||||
if ((*string == ' ') || (*string == '\t')) {
|
||||
/* skip all whitespace (and null it) */
|
||||
while (*string == ' ' || *string == '\t')
|
||||
*string++ = 0;
|
||||
/* if our ugly static array is big enough, store
|
||||
* argument to string_argv[]
|
||||
*/
|
||||
if (i < MAX_ARGS)
|
||||
string_argv[i++] = string;
|
||||
}
|
||||
string++;
|
||||
}
|
||||
|
||||
/* prevent array from overflowing */
|
||||
string_argc = (i <= MAX_ARGS) ? i : MAX_ARGS;
|
||||
|
||||
/* and return whether there was an overflow */
|
||||
return (i <= MAX_ARGS) ? 0 : 1;
|
||||
}
|
||||
|
|
@ -2,6 +2,7 @@
|
|||
* This file is part of the libpayload project.
|
||||
*
|
||||
* Copyright (C) 2008 Advanced Micro Devices, Inc.
|
||||
* Copyright (C) 2008-2010 coresystems GmbH
|
||||
*
|
||||
* Redistribution and use in source and binary forms, with or without
|
||||
* modification, are permitted provided that the following conditions
|
||||
|
|
@ -38,6 +39,7 @@
|
|||
* your buffers, kids!).
|
||||
*/
|
||||
|
||||
#define IN_MALLOC_C
|
||||
#include <libpayload.h>
|
||||
|
||||
extern char _heap, _eheap; /* Defined in the ldscript. */
|
||||
|
|
@ -66,11 +68,21 @@ typedef unsigned int hdrtype_t;
|
|||
static int free_aligned(void* addr);
|
||||
void print_malloc_map(void);
|
||||
|
||||
#ifdef CONFIG_DEBUG_MALLOC
|
||||
static int heap_initialized = 0;
|
||||
static int minimal_free = 0;
|
||||
#endif
|
||||
|
||||
static void setup(void)
|
||||
{
|
||||
int size = (unsigned int)(&_eheap - &_heap) - HDRSIZE;
|
||||
|
||||
*((hdrtype_t *) hstart) = FREE_BLOCK(size);
|
||||
|
||||
#ifdef CONFIG_DEBUG_MALLOC
|
||||
heap_initialized = 1;
|
||||
minimal_free = size;
|
||||
#endif
|
||||
}
|
||||
|
||||
static void *alloc(int len)
|
||||
|
|
@ -94,7 +106,9 @@ static void *alloc(int len)
|
|||
int size = SIZE(header);
|
||||
|
||||
if (!HAS_MAGIC(header) || size == 0) {
|
||||
printf("memory allocator panic.\n");
|
||||
printf("memory allocator panic. (%s%s)\n",
|
||||
!HAS_MAGIC(header) ? " no magic " : "",
|
||||
size == 0 ? " size=0 " : "");
|
||||
halt();
|
||||
}
|
||||
|
||||
|
|
@ -268,9 +282,16 @@ struct align_region_t
|
|||
|
||||
static struct align_region_t* align_regions = 0;
|
||||
|
||||
static struct align_region_t *allocate_region(struct align_region_t *old_first, int alignment, int num_elements)
|
||||
static struct align_region_t *allocate_region(int alignment, int num_elements)
|
||||
{
|
||||
struct align_region_t *new_region = malloc(sizeof(struct align_region_t));
|
||||
struct align_region_t *new_region;
|
||||
#ifdef CONFIG_DEBUG_MALLOC
|
||||
printf("%s(old align_regions=%p, alignment=%u, num_elements=%u)\n",
|
||||
__func__, align_regions, alignment, num_elements);
|
||||
#endif
|
||||
|
||||
new_region = malloc(sizeof(struct align_region_t));
|
||||
|
||||
if (!new_region)
|
||||
return NULL;
|
||||
new_region->alignment = alignment;
|
||||
|
|
@ -282,8 +303,9 @@ static struct align_region_t *allocate_region(struct align_region_t *old_first,
|
|||
new_region->start_data = (void*)((u32)(new_region->start + num_elements + alignment - 1) & (~(alignment-1)));
|
||||
new_region->size = num_elements * alignment;
|
||||
new_region->free = num_elements;
|
||||
new_region->next = old_first;
|
||||
new_region->next = align_regions;
|
||||
memset(new_region->start, 0, num_elements);
|
||||
align_regions = new_region;
|
||||
return new_region;
|
||||
}
|
||||
|
||||
|
|
@ -325,15 +347,29 @@ look_further:
|
|||
{
|
||||
if ((reg->alignment == align) && (reg->free >= (size + align - 1)/align))
|
||||
{
|
||||
#ifdef CONFIG_DEBUG_MALLOC
|
||||
printf(" found memalign region. %x free, %x required\n", reg->free, (size + align - 1)/align);
|
||||
#endif
|
||||
break;
|
||||
}
|
||||
reg = reg->next;
|
||||
}
|
||||
if (reg == 0)
|
||||
{
|
||||
align_regions = allocate_region(align_regions, align, (size/align<99)?100:((size/align)+1));
|
||||
reg = align_regions;
|
||||
#ifdef CONFIG_DEBUG_MALLOC
|
||||
printf(" need to allocate a new memalign region\n");
|
||||
#endif
|
||||
/* get align regions */
|
||||
reg = allocate_region(align, (size<1024)?(1024/align):(((size-1)/align)+1));
|
||||
#ifdef CONFIG_DEBUG_MALLOC
|
||||
printf(" ... returned %p\n", align_regions);
|
||||
#endif
|
||||
}
|
||||
if (reg == 0) {
|
||||
/* Nothing available. */
|
||||
return (void *)NULL;
|
||||
}
|
||||
|
||||
int i, count = 0, target = (size+align-1)/align;
|
||||
for (i = 0; i < (reg->size/align); i++)
|
||||
{
|
||||
|
|
@ -358,16 +394,20 @@ look_further:
|
|||
}
|
||||
|
||||
/* This is for debugging purposes. */
|
||||
#ifdef TEST
|
||||
#ifdef CONFIG_DEBUG_MALLOC
|
||||
void print_malloc_map(void)
|
||||
{
|
||||
void *ptr = hstart;
|
||||
int free_memory = 0;
|
||||
|
||||
while (ptr < hend) {
|
||||
hdrtype_t hdr = *((hdrtype_t *) ptr);
|
||||
|
||||
if (!HAS_MAGIC(hdr)) {
|
||||
if (heap_initialized)
|
||||
printf("Poisoned magic - we're toast\n");
|
||||
else
|
||||
printf("No magic yet - going to initialize\n");
|
||||
break;
|
||||
}
|
||||
|
||||
|
|
@ -377,7 +417,15 @@ void print_malloc_map(void)
|
|||
(unsigned int)(ptr - hstart),
|
||||
hdr & FLAG_FREE ? "FREE" : "USED", SIZE(hdr));
|
||||
|
||||
if (hdr & FLAG_FREE)
|
||||
free_memory += SIZE(hdr);
|
||||
|
||||
ptr += HDRSIZE + SIZE(hdr);
|
||||
}
|
||||
|
||||
if (free_memory && (minimal_free > free_memory))
|
||||
minimal_free = free_memory;
|
||||
printf("Maximum memory consumption: %d bytes",
|
||||
(unsigned int)(&_eheap - &_heap) - HDRSIZE - minimal_free);
|
||||
}
|
||||
#endif
|
||||
|
|
|
|||
|
|
@ -171,7 +171,9 @@ char *strcpy(char *d, const char *s)
|
|||
char *strncat(char *d, const char *s, size_t n)
|
||||
{
|
||||
char *p = d + strlen(d);
|
||||
int max = n > strlen(s) ? strlen(s) : n;
|
||||
int sl = strlen(s);
|
||||
int max = n > sl ? sl : n;
|
||||
// int max = n > strlen(s) ? strlen(s) : n;
|
||||
int i;
|
||||
|
||||
for (i = 0; i < max; i++)
|
||||
|
|
@ -181,6 +183,30 @@ char *strncat(char *d, const char *s, size_t n)
|
|||
return d;
|
||||
}
|
||||
|
||||
/**
|
||||
* Concatenates two strings with a maximum length.
|
||||
*
|
||||
* @param d The destination string.
|
||||
* @param s The source string.
|
||||
* @param n Not more than n characters from s will be appended to d.
|
||||
* @return A pointer to the destination string.
|
||||
*/
|
||||
size_t strlcat(char *d, const char *s, size_t n)
|
||||
{
|
||||
int sl = strlen(s);
|
||||
int dl = strlen(d);
|
||||
|
||||
char *p = d + dl;
|
||||
int max = n > (sl + dl) ? sl : (n - dl - 1);
|
||||
int i;
|
||||
|
||||
for (i = 0; i < max; i++)
|
||||
p[i] = s[i];
|
||||
|
||||
p[i] = '\0';
|
||||
return max;
|
||||
}
|
||||
|
||||
/**
|
||||
* Find a character in a string.
|
||||
*
|
||||
|
|
@ -201,6 +227,27 @@ char *strchr(const char *s, int c)
|
|||
return NULL;
|
||||
}
|
||||
|
||||
/**
|
||||
* Find a character in a string.
|
||||
*
|
||||
* @param s The string.
|
||||
* @param c The character.
|
||||
* @return A pointer to the last occurence of the character in the
|
||||
* string, or NULL if the character was not encountered within the string.
|
||||
*/
|
||||
|
||||
char *strrchr(const char *s, int c)
|
||||
{
|
||||
char *p = (char *)s + strlen(s);
|
||||
|
||||
for (; p >= s; p--) {
|
||||
if (*p == c)
|
||||
return p;
|
||||
}
|
||||
|
||||
return NULL;
|
||||
}
|
||||
|
||||
/**
|
||||
* Duplicate a string.
|
||||
*
|
||||
|
|
|
|||
Loading…
Reference in New Issue