mirror of
https://github.com/ibm-s390-linux/s390-tools.git
synced 2026-08-05 02:14:52 +00:00
427dff3450
This patch - moves function util_strstrip to libutil/util_libc.c and deletes the extra files util_strstip.[ch] - adds doxygen comments for util_strstrip() - provides an example on how to use util_strstrip(). Signed-off-by: Thomas Richter <tmricht@linux.vnet.ibm.com> Signed-off-by: Jan Höppner <hoeppner@linux.ibm.com>
62 lines
1.7 KiB
C
62 lines
1.7 KiB
C
/**
|
|
* util_libc_example - Example program for util_libc
|
|
*
|
|
* Copyright IBM Corp. 2016, 2017
|
|
*
|
|
* s390-tools is free software; you can redistribute it and/or modify
|
|
* it under the terms of the MIT license. See LICENSE for details.
|
|
*/
|
|
|
|
//! [code]
|
|
#include <stdio.h>
|
|
#include <stdlib.h>
|
|
#include <string.h>
|
|
|
|
#include "lib/util_libc.h"
|
|
#include "lib/util_panic.h"
|
|
|
|
#define EXAMPLE_WORD " /sys/devices/system/cpu "
|
|
|
|
/*
|
|
* Demonstrate that out of memory is automatically handled via panic()
|
|
*/
|
|
int main(void)
|
|
{
|
|
unsigned long ulong_max = (unsigned long)-1;
|
|
void *ptr;
|
|
char *zeroes, *str;
|
|
char buffer[sizeof(EXAMPLE_WORD)];
|
|
|
|
strcat(buffer, EXAMPLE_WORD);
|
|
fprintf(stderr, "Try to remove leading and trailing spaces from "
|
|
"\"%s\"\nresult = \"%s\"\n", EXAMPLE_WORD,
|
|
util_strstrip(buffer));
|
|
|
|
/* Use util_strcat_realloc() for string concatenation */
|
|
fprintf(stderr, "Try to concatenate \"Hello\", \", \" and \"world!\": ");
|
|
str = util_strdup("Hello");
|
|
str = util_strcat_realloc(str, ", ");
|
|
str = util_strcat_realloc(str, "world!");
|
|
fprintf(stderr, "result = \"%s\"\n", str);
|
|
free(str);
|
|
|
|
/* One byte allocation should work */
|
|
fprintf(stderr, "Try to allocate 1 byte: ");
|
|
ptr = util_malloc(1);
|
|
fprintf(stderr, "done\n");
|
|
|
|
/* One byte zeroed-allocation should work */
|
|
fprintf(stderr, "Try to allocate 1 byte initialized with zeroes: ");
|
|
zeroes = util_zalloc(1);
|
|
fprintf(stderr, "done\n");
|
|
util_assert(*zeroes == 0, "Garbage found in zero initialized memory\n");
|
|
|
|
/* The next allocation will probably fail */
|
|
fprintf(stderr, "Try to allocate %lu bytes:\n", ulong_max);
|
|
ptr = util_malloc(ulong_max);
|
|
|
|
fprintf(stderr, "You should not see me (ptr=%p)!\n", ptr);
|
|
return EXIT_FAILURE;
|
|
}
|
|
//! [code]
|