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  1. #include <stdio.h>
  2. #include <stdint.h> 
  3. #include <string.h>
  4.  
  5. #define haszero(v) (((v) - 0x0101010101010101UL) & ~(v) & 0x8080808080808080UL)
  6. /*
  7. uint64_t ct_hash(const uint64_t *ptr)
  8. {
  9.     uint64_t val = 14695981039346656037ull;
  10.     
  11.     for (size_t i=0;;++i) {
  12.         val ^= ptr[i];
  13.         val *= 1099511628211ull;
  14.         if haszero(ptr[i]) {
  15.             return val;
  16.         }
  17.     }
  18. }
  19.  
  20. uint64_t barop(const char *ptr){
  21.     uint64_t * p64 = (uint64_t*)ptr;
  22.      return haszero(* (p64)) 
  23.         ? * (p64)
  24.         : ct_hash(p64)
  25.      ;
  26. }
  27. */
  28. uint64_t bagor(const char *ptr){
  29.     uint64_t * p64 = (uint64_t*)ptr;
  30.      return haszero(* (p64)) 
  31.         ? * (p64)
  32.         : -1
  33.      ;
  34. }
  35.  
  36.  
  37. #define SWITCH(ptr)                     \
  38.     do{                                 \
  39.     uint64_t Switch = (bagor(ptr));     \
  40.     const char * SwitchKey = ptr;       \
  41.     if (0){ 
  42.  
  43. #define CASE(ptr) } else if (-1 != Switch                       \
  44.                 ?    Switch == bagor(ptr)                       \
  45.                 :    0 == strcmp(SwitchKey, ptr)                \
  46.                  ){
  47. #define DEFAULT } else {
  48. #define ENDCASE } } while(0);
  49.  
  50.  
  51. void say(const char who[8]){
  52.     printf("%8s says: ",who); 
  53.     SWITCH(who) 
  54.     CASE("pituh") 
  55.         puts("kokoko"); 
  56.     CASE("lalka")
  57.          puts("azaza");
  58.     CASE("syoma")
  59.          puts("rus-nya");
  60.     CASE("bagor")
  61.          puts("hhhrghh");
  62.     CASE("korova")
  63.          puts("mootools");
  64.          break;
  65.          puts("unreachable");
  66.     CASE("Stripper Penetrator\0\0")
  67.          puts("vanished");
  68.     DEFAULT
  69.         puts("dunno, lol");
  70.     ENDCASE
  71.  
  72.  
  73. }
  74. int main()
  75. {
  76.     say("syoma");
  77.     say("korova");
  78.     say("pituh");
  79.     say("neznayka");
  80.     say("Stripper Penetrator");    
  81.  
  82.     return 0;
  83. }
Success #stdin #stdout 0s 5540KB
comments (?)
stdin
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Standard input is empty
stdout
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   syoma says: rus-nya
  korova says: mootools
   pituh says: kokoko
neznayka says: dunno, lol
Stripper Penetrator says: vanished
https://ideone.com/a4Ni8C
language:
C (gcc 8.3)
created:
4 years ago
visibility:
public

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