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annotate common/strhelp.c @ 59:3f6378647371

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Start work on cinst. Strhelp new helpers to work with C String arrays and to have a terminating malloc / realloc
author Andre Heinecke <aheinecke@intevation.de>
date Tue, 18 Mar 2014 10:04:30 +0000
parents
children 6acb1dae6185
rev   line source
59
3f6378647371 Start work on cinst. Strhelp new helpers to work with C String
Andre Heinecke <aheinecke@intevation.de>
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1
3f6378647371 Start work on cinst. Strhelp new helpers to work with C String
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2 #include <stdio.h>
3f6378647371 Start work on cinst. Strhelp new helpers to work with C String
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3 #include <stdlib.h>
3f6378647371 Start work on cinst. Strhelp new helpers to work with C String
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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);
3f6378647371 Start work on cinst. Strhelp new helpers to work with C String
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11 exit(2);
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12 }
3f6378647371 Start work on cinst. Strhelp new helpers to work with C String
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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
3f6378647371 Start work on cinst. Strhelp new helpers to work with C String
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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 xstrdup( const char *string )
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33 {
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34 void *p = xmalloc( strlen(string)+1 );
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35 strcpy( p, string );
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36 return p;
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37 }
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38
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39
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40 /**
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41 * strv_length:
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42 * @str_array: a %NULL-terminated array of strings
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43 *
3f6378647371 Start work on cinst. Strhelp new helpers to work with C String
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44 * Returns the length of the given %NULL-terminated
3f6378647371 Start work on cinst. Strhelp new helpers to work with C String
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45 * string array @str_array.
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46 *
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47 * Return value: length of @str_array.
3f6378647371 Start work on cinst. Strhelp new helpers to work with C String
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48 *
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49 */
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50 unsigned int
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51 strv_length (char **str_array)
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52 {
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53 unsigned int i = 0;
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54
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55 if (!str_array)
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56 return 0;
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57
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58 while (str_array[i])
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59 ++i;
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60
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61 return i;
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62 }
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63
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64 /* @brief append a string to a NULL terminated array of strings.
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65 *
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66 * @param[inout] array pointer to the NULL terminated list of string pointers.
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67 * @param[in] string pointer to the string to append to the list.
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68 * */
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69 void array_append_str(char ***pArray, const char *string)
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70 {
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71 unsigned int old_len = strv_length(*pArray);
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72 *pArray = xrealloc(*pArray, sizeof(char**) * (old_len + 2));
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73
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74 *pArray[old_len] = xstrdup(string);
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75 *pArray[old_len + 1] = NULL;
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76 }
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77
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78 /* @brief append a string to another string.
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79 *
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80 * @param[inout] pDst pointer to the string to be extended.
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81 * @param[in] appendage pointer to the string to append.
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82 * */
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83 void str_append_str(char **pDst, const char *appendage)
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84 {
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85 size_t old_len = strlen(*pDst),
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86 added_len = strlen(appendage);
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87 size_t new_len = old_len + added_len + 1;
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88
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89 if (!appendage)
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90 return;
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91
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92 *pDst = (char *)xrealloc(*pDst, sizeof(char) * (new_len));
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93
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94 strcpy(*pDst + old_len, appendage);
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95
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96 *pDst[new_len - 1] = '\0';
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97 }
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98
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99 void
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100 strfreev (char **str_array)
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101 {
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102 if (str_array)
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103 {
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104 int i;
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105
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106 for (i = 0; str_array[i] != NULL; i++)
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107 free (str_array[i]);
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108
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109 free (str_array);
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110 }
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111 }
http://wald.intevation.org/projects/trustbridge/