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  1. #include<stdio.h>
  2. #include<stdlib.h>
  3. #include<string.h>
  4.  
  5. // タイプ識別子
  6. typedef enum {
  7.     VTP_CHAR = 0,
  8.     VTP_INT,
  9.     //…
  10. } V_TYPE;
  11.  
  12. // タイプごとのサイズ
  13. enum {
  14.     TSZ_CHAR = sizeof(char),
  15.     TSZ_INT = sizeof(int),
  16.     //…
  17. };
  18.  
  19. // 本体データ
  20. typedef struct _VARIANT {
  21.     char m_name[256];
  22.     V_TYPE m_type;
  23.     int m_size;                 // = memsize = sizeof(…) * n
  24.     void *m_data;
  25. } VARIANT;
  26.  
  27. VARIANT *mk_arr(char *name, char *type, int n)
  28. {
  29.     VARIANT *p_tmp;
  30.     int sz;
  31.     V_TYPE tp;
  32.  
  33.     // check
  34.     if (0 == strcmp(type, "char")) {
  35.         sz = TSZ_CHAR;
  36.         tp = VTP_CHAR;
  37.     } else if (0 == strcmp(type, "int")) {
  38.         sz = TSZ_INT;
  39.         tp = VTP_INT;
  40. //…} else if (0 == strcmp(type, "……")) {
  41. //…    ;
  42.     } else {
  43.         return NULL;
  44.     }
  45.  
  46.     // alloc
  47.     if (NULL == (p_tmp = malloc(sizeof(VARIANT)))) {
  48.         return NULL;
  49.     }
  50.     // set
  51.     strcpy(p_tmp->m_name, name);
  52.     p_tmp->m_type = tp;
  53.     p_tmp->m_size = sz * n;
  54.     if (0 == (p_tmp->m_data = malloc(p_tmp->m_size))) {
  55.         free(p_tmp);
  56.         return NULL;
  57.     } else {
  58.         return p_tmp;
  59.     }
  60. }
  61.  
  62. void del_arr(VARIANT * p)
  63. {
  64.     free(p->m_data);
  65.     free(p);
  66. }
  67.  
  68. int main()
  69. {
  70.     VARIANT *p;
  71.     char name[] = "str";
  72.     char type[] = "int";
  73.     int n = 10;
  74.  
  75.     if (NULL == (p = mk_arr(name, type, n))) {
  76.         printf("作成失敗\n");
  77.         return 1;
  78.     } else {
  79.         printf("作成しました　%s %s[%d]\n", type, name, n);
  80.     }
  81.     del_arr(p);
  82.  
  83.     return 0;
  84. }
  85.  
Success #stdin #stdout 0s 1920KB
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作成しました　int str[10]
https://ideone.com/2iRLeD
language:
C (gcc 8.3)
created:
11 years ago
visibility:
secret

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