aheinecke@59: 
aheinecke@59: #include <stdio.h>
aheinecke@59: #include <stdlib.h>
aheinecke@59: #include <string.h>
aheinecke@59: #include <assert.h>
aheinecke@59: 
aheinecke@59: static void
aheinecke@59: out_of_core(void)
aheinecke@59: {
aheinecke@59:     fputs("\nfatal: out of memory\n", stderr);
aheinecke@59:     exit(2);
aheinecke@59: }
aheinecke@59: void *
aheinecke@59: xmalloc( size_t n )
aheinecke@59: {
aheinecke@59:     void *p = malloc( n );
aheinecke@59:     if( !p )
aheinecke@59:         out_of_core();
aheinecke@59:     return p;
aheinecke@59: }
aheinecke@59: 
aheinecke@59: void *
aheinecke@59: xrealloc( void *a, size_t n )
aheinecke@59: {
aheinecke@59:     void *p = realloc( a, n );
aheinecke@59:     if( !p )
aheinecke@59:         out_of_core();
aheinecke@59:     return p;
aheinecke@59: }
aheinecke@59: 
aheinecke@59: char *
aheinecke@59: xstrdup( const char *string )
aheinecke@59: {
aheinecke@59:     void *p = xmalloc( strlen(string)+1 );
aheinecke@59:     strcpy( p, string );
aheinecke@59:     return p;
aheinecke@59: }
aheinecke@59: 
aheinecke@59: 
aheinecke@59: /**
aheinecke@59:  * strv_length:
aheinecke@59:  * @str_array: a %NULL-terminated array of strings
aheinecke@59:  *
aheinecke@59:  * Returns the length of the given %NULL-terminated
aheinecke@59:  * string array @str_array.
aheinecke@59:  *
aheinecke@59:  * Return value: length of @str_array.
aheinecke@59:  *
aheinecke@59:  */
aheinecke@59: unsigned int
aheinecke@59: strv_length (char **str_array)
aheinecke@59: {
aheinecke@59:     unsigned int i = 0;
aheinecke@59: 
aheinecke@59:     if (!str_array)
aheinecke@59:         return 0;
aheinecke@59: 
aheinecke@59:     while (str_array[i])
aheinecke@59:         ++i;
aheinecke@59: 
aheinecke@59:     return i;
aheinecke@59: }
aheinecke@59: 
aheinecke@59: /* @brief append a string to a NULL terminated array of strings.
aheinecke@59:  *
aheinecke@59:  * @param[inout] array pointer to the NULL terminated list of string pointers.
aheinecke@59:  * @param[in] string pointer to the string to append to the list.
aheinecke@59:  * */
aheinecke@59: void array_append_str(char ***pArray, const char *string)
aheinecke@59: {
aheinecke@59:     unsigned int old_len = strv_length(*pArray);
aheinecke@59:     *pArray = xrealloc(*pArray, sizeof(char**) * (old_len + 2));
aheinecke@59: 
aheinecke@59:     *pArray[old_len] = xstrdup(string);
aheinecke@59:     *pArray[old_len + 1] = NULL;
aheinecke@59: }
aheinecke@59: 
aheinecke@59: /* @brief append a string to another string.
aheinecke@59:  *
aheinecke@59:  * @param[inout] pDst pointer to the string to be extended.
aheinecke@59:  * @param[in] appendage pointer to the string to append.
aheinecke@59:  * */
aheinecke@59: void str_append_str(char **pDst, const char *appendage)
aheinecke@59: {
aheinecke@59:     size_t old_len = strlen(*pDst),
aheinecke@59:            added_len = strlen(appendage);
aheinecke@59:     size_t new_len = old_len + added_len + 1;
aheinecke@59: 
aheinecke@59:     if (!appendage)
aheinecke@59:         return;
aheinecke@59: 
aheinecke@59:     *pDst = (char *)xrealloc(*pDst, sizeof(char) * (new_len));
aheinecke@59: 
aheinecke@59:     strcpy(*pDst + old_len, appendage);
aheinecke@59: 
aheinecke@59:     *pDst[new_len - 1] = '\0';
aheinecke@59: }
aheinecke@59: 
aheinecke@59: void
aheinecke@59: strfreev (char **str_array)
aheinecke@59: {
aheinecke@59:   if (str_array)
aheinecke@59:     {
aheinecke@59:       int i;
aheinecke@59: 
aheinecke@59:       for (i = 0; str_array[i] != NULL; i++)
aheinecke@59:         free (str_array[i]);
aheinecke@59: 
aheinecke@59:       free (str_array);
aheinecke@59:     }
aheinecke@59: }