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annotate common/strhelp.c @ 116:c602d8cfa619

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Refactoring: unified naming of string vector functions.
author Sascha Wilde <wilde@intevation.de>
date Fri, 21 Mar 2014 17:42:00 +0100
parents 80ab2168760f
children 9104b1b2e4da
rev   line source
59
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1
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2 #include <stdio.h>
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3 #include <stdlib.h>
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4 #include <string.h>
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5 #include <assert.h>
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6
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7 static void
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8 out_of_core(void)
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9 {
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10 fputs("\nfatal: out of memory\n", stderr);
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11 exit(2);
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12 }
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13 void *
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14 xmalloc( size_t n )
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15 {
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16 void *p = malloc( n );
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17 if( !p )
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18 out_of_core();
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19 return p;
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20 }
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21
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22 void *
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23 xrealloc( void *a, size_t n )
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24 {
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25 void *p = realloc( a, n );
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26 if( !p )
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27 out_of_core();
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28 return p;
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29 }
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30
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31 char *
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32 xstrndup( const char *string, const size_t len )
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33 {
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34 char *p = xmalloc( len + 1 );
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35 memcpy( p, string, len );
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36 p[len] = '\0';
59
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37 return p;
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38 }
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39
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40 unsigned int
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41 strv_length (char **str_array)
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42 {
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43 unsigned int i = 0;
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44
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45 if (!str_array)
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46 return 0;
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47
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48 while (str_array[i])
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49 ++i;
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50
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51 return i;
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52 }
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53
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54 void strv_append (char ***pArray, const char *string, const size_t len)
59
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55 {
60
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56 unsigned int old_len = 0;
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57
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58 if (!*pArray) {
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59 *pArray = xmalloc(2 * sizeof(char*));
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60 (*pArray)[0] = xstrndup(string, len);
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61 (*pArray)[1] = NULL;
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62 return;
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63 }
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64 old_len = strv_length(*pArray);
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65 *pArray = xrealloc(*pArray, sizeof(char**) * (old_len + 2));
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66
60
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67 (*pArray)[old_len] = xstrndup(string, len);
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68 (*pArray)[old_len + 1] = NULL;
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69 }
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70
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71 void
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72 str_append_str(char **pDst, size_t *dst_len, const char *appendage, const size_t len)
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73 {
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74 if (!appendage)
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75 return;
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76
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77 if (!(*pDst)) {
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78 *pDst = xstrndup(appendage, len);
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79 *dst_len = len;
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80 } else {
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81 size_t new_size = (*dst_len) + len + 1;
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82 char *p_old = *pDst;
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83 *pDst = xmalloc(new_size);
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84 strncpy(*pDst, p_old, *dst_len);
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85 strncpy(*pDst + *dst_len, appendage, len);
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86 *dst_len = new_size - 1;
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87 (*pDst)[*dst_len] = '\0';
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88 free (p_old);
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89 }
59
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90 }
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91
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92 void
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93 strv_free (char **str_array)
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94 {
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95 if (str_array)
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96 {
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97 int i;
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98
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99 for (i = 0; str_array[i] != NULL; i++)
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100 free (str_array[i]);
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101
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102 free (str_array);
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103 }
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104 }
http://wald.intevation.org/projects/trustbridge/