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  1. #include<stdio.h>
  2. #include<stdint.h>
  3. #include<string.h>
  4.  
  5. #define AER_REQ_RESPONSE_READY 0
  6.  
  7. uint8_t currentZoom = 0;
  8.  
  9. void zoomToPercentage(uint8_t percentage) {
  10.     printf("Zoom to %d\n", percentage);
  11.     currentZoom = percentage;
  12. }
  13.  
  14. int8_t max(int8_t a, int8_t b) {
  15.     if (a >= b) {
  16.         return a;
  17.     }
  18.     return b;
  19. }
  20. int8_t min(int8_t a, int8_t b) {
  21.     if (a < b) {
  22.         return a;
  23.     }
  24.     return b;
  25. }
  26.  
  27. int nextZoom(int8_t plusZoomPercentage) {
  28.     //if (!unabto_query_read_int8(readBuffer, &plusZoomPercentage))
  29.     //{
  30.     //        return AER_REQ_TOO_SMALL;
  31.     //}
  32.     if (plusZoomPercentage != 0)
  33.     {
  34.         uint8_t currentZoomPercentage = currentZoom;
  35.         plusZoomPercentage = max(plusZoomPercentage, -currentZoomPercentage);
  36.         plusZoomPercentage = min(plusZoomPercentage, 100 - currentZoomPercentage);
  37.         zoomToPercentage(currentZoomPercentage + plusZoomPercentage);
  38.     }
  39.     return AER_REQ_RESPONSE_READY;
  40. }
  41.  
  42.  
  43. int main()
  44. {
  45.     nextZoom(50);
  46.     nextZoom(50);
  47.     nextZoom(50);
  48.     nextZoom(-120);
  49. }
  50.  
Success #stdin #stdout 0s 2008KB
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https://ideone.com/BI5yXc
language:
C99 (gcc 8.3)
created:
9 years ago
visibility:
public

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