JJSierraM/squiggle.c
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format squiggle.c

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NunoSempere 2023-07-16 22:59:47 +02:00
parent 6247fbfb7b
commit bebb7c6d46
1 changed files with 11 additions and 13 deletions
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squiggle.c
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@ -10,11 +10,9 @@
#define EXIT_ON_ERROR 0 #define EXIT_ON_ERROR 0
#define PROCESS_ERROR(error_msg) process_error(error_msg, EXIT_ON_ERROR, __FILE__, __LINE__) #define PROCESS_ERROR(error_msg) process_error(error_msg, EXIT_ON_ERROR, __FILE__, __LINE__)
// PI constant
const float PI = 3.14159265358979323846; // M_PI in gcc gnu99 const float PI = 3.14159265358979323846; // M_PI in gcc gnu99
// Pseudo Random number generator // Pseudo Random number generator
uint32_t xorshift32(uint32_t* seed) uint32_t xorshift32(uint32_t* seed)
{ {
// Algorithm "xor" from p. 4 of Marsaglia, "Xorshift RNGs" // Algorithm "xor" from p. 4 of Marsaglia, "Xorshift RNGs"
@ -30,7 +28,6 @@ uint32_t xorshift32(uint32_t* seed)
} }
// Distribution & sampling functions // Distribution & sampling functions
float rand_0_to_1(uint32_t* seed) float rand_0_to_1(uint32_t* seed)
{ {
return ((float)xorshift32(seed)) / ((float)UINT32_MAX); return ((float)xorshift32(seed)) / ((float)UINT32_MAX);
@ -128,16 +125,17 @@ struct box {
char* error_msg; char* error_msg;
}; };
struct box process_error(const char* error_msg, int should_exit, char* file, int line){ struct box process_error(const char* error_msg, int should_exit, char* file, int line)
if(should_exit){ {
printf("@, in %s (%d)", file, line); if (should_exit) {
exit(1); printf("@, in %s (%d)", file, line);
}else{ exit(1);
char error_msg[MAX_ERROR_LENGTH]; } else {
snprintf(error_msg, MAX_ERROR_LENGTH, "@, in %s (%d)", file, line); char error_msg[MAX_ERROR_LENGTH];
struct box error = { .empty = 1, .error_msg = error_msg }; snprintf(error_msg, MAX_ERROR_LENGTH, "@, in %s (%d)", file, line);
return error; struct box error = { .empty = 1, .error_msg = error_msg };
} return error;
}
} }
// Inverse cdf at point // Inverse cdf at point