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  1. #include <stdio.h>
  2. #include <string.h>
  3. #include <stdlib.h>
  4.  
  5. #define DEFAULT_SIZE 10
  6.  
  7. typedef struct {
  8. 	char (*pointer)[256];
  9. 	int used;
  10. 	int size;
  11. } Array;
  12.  
  13. Array *createArray(int start_size) {
  14.     Array *array = malloc(sizeof( *array));
  15.     array->used = 0;
  16.     array->size = start_size;
  17.     array->pointer = malloc(start_size * sizeof *array->pointer); // <--- here
  18.     return array;
  19. }
  20.  
  21.  
  22. void append(Array *array, char* elem) {
  23.     if (array->used >= array->size) {
  24.         // expand table
  25.         array->pointer = realloc(array->pointer, array->size * 2 * sizeof *array->pointer);
  26.         array->size *= 2;
  27.     }
  28.     // append new arg
  29.     strcpy(array->pointer[array->used] , elem); // <-- here
  30.     array->used++;
  31. }
  32.  
  33. Array *parse(char* command) {
  34.     // split command by space and store each arg in array
  35.     char *args_str;
  36.     Array *args_list = createArray(DEFAULT_SIZE); // expandable array holding arguments
  37.  
  38.     args_str = strtok(command, " ");
  39.  
  40. 	do {
  41. 		append(args_list, args_str);
  42. 	} while(args_str = strtok(NULL, " "));
  43.  
  44.  
  45. 	return args_list;
  46. }
  47.  
  48. int main(void)
  49. {
  50. 	Array *array;
  51. 	char cmd[] = "ls -alh --color /tmp";
  52.  
  53. 	array = parse(cmd);
  54.  
  55. 	if(array == NULL)
  56. 		return 0;
  57.  
  58. 	printf("Array->used: %d, array->size: %d\n", array->used, array->size);
  59. 	for(int i = 0; i < array->used; ++i)
  60. 		puts(array->pointer[i]);
  61.  
  62. 	free(array->pointer);
  63. 	free(array);
  64. }
  65.  
Success #stdin #stdout 0s 4352KB
comments ()
stdin 
Standard input is empty
stdout 
Array->used: 4, array->size: 10
ls
-alh
--color
/tmp
https://ideone.com/9VYyYH
language:
C (gcc 8.3)
created:
7 years ago
visibility:
public

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