src/strlcpy.c

   1 /*
   2  * transsip - the telephony network
   3  * By Daniel Borkmann <daniel@transsip.org>
   4  * Copyright 2011 Daniel Borkmann <dborkma@tik.ee.ethz.ch>,
   5  * Swiss federal institute of technology (ETH Zurich)
   6  * Subject to the GPL, version 2.
   7  * strlcpy: Copyright (C) 1991, 1992  Linus Torvalds, GPL, version 2
   8  */
   9
  10 #define _BSD_SOURCE
  11 #include <string.h>
  12 #include <stdio.h>
  13 #include <stdarg.h>
  14
  15 #include "strlcpy.h"
  16 #include "xmalloc.h"
  17 #include "die.h"
  18
  19 size_t strlcpy(char *dest, const char *src, size_t size)
  20 {
  21         size_t ret = strlen(src);
  22         if (size) {
  23                 size_t len = (ret >= size) ? size - 1 : ret;
  24                 memcpy(dest, src, len);
  25                 dest[len] = '\0';
  26         }
  27         return ret;
  28 }
  29
  30 int slprintf(char *dst, size_t size, const char *fmt, ...)
  31 {
  32         int ret;
  33         va_list ap;
  34         va_start(ap, fmt);
  35         ret = vsnprintf(dst, size, fmt, ap);
  36         dst[size - 1] = '\0';
  37         va_end(ap);
  38         return ret;
  39 }
  40
  41 char **strntoargv(char *str, size_t len, int *argc)
  42 {
  43         int done = 0;
  44         char **argv = NULL;
  45         if (argc == NULL)
  46                 panic("argc is null!\n");
  47         *argc = 0;
  48         if (len <= 1) /* '\0' */
  49                 goto out;
  50         while (!done) {
  51                 while (len > 0 && *str == ' ') {
  52                         len--;
  53                         str++;
  54                 }
  55                 if (len > 0 && *str != '\0') {
  56                         (*argc)++;
  57                         argv = xrealloc(argv, 1, sizeof(char *) * (*argc));
  58                         argv[(*argc) - 1] = str;
  59                         while (len > 0 && *str != ' ') {
  60                                 len--;
  61                                 str++;
  62                         }
  63                         if (len > 0 && *str == ' ') {
  64                                 len--;
  65                                 *str = '\0';
  66                                 str++;
  67                         }
  68                 } else {
  69                         done = 1;
  70                 }
  71         }
  72 out:
  73         return argv;
  74 }
  75