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  1. #include <stdio.h>
  2. #include <stdint.h>
  3. #include <stdarg.h>
  4.  
  5. #define STOP  0
  6. #define WRITE 1
  7. #define READ  2
  8.  
  9. void vfunc(unsigned action, ...)
  10. {
  11.     va_list ap;
  12.  
  13.     va_start(ap, action);
  14.  
  15.     while ((action == WRITE) || (action == READ))
  16.     {
  17.         uint8_t *ptr = va_arg(ap, uint8_t*);
  18.  
  19.         int len = va_arg(ap, int);
  20.  
  21.         printf("action=0x%04x, ptr=%p, len=%d\n", action, ptr, len);
  22.  
  23.         action = va_arg(ap, unsigned);
  24.     }
  25.  
  26.     va_end(ap);
  27. }
  28.  
  29.  
  30. int main(void)
  31. {
  32.     uint8_t foo = 55;
  33.  
  34.     uint8_t bar = 66;
  35.  
  36.     uint8_t *p_bar = &(bar);
  37.  
  38.     vfunc(WRITE, &(foo), 1, READ, p_bar, 1, STOP);
  39.  
  40.     return 0;
  41. }
  42.  
Success #stdin #stdout 0s 9424KB
comments (?)
stdin
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Standard input is empty
stdout
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action=0x0001, ptr=0x7ffe19c8691e, len=1
action=0x0002, ptr=0x7ffe19c8691f, len=1
https://ideone.com/L6hr4G
language:
C (gcc 8.3)
created:
5 years ago
visibility:
public

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