squiggle.c/squiggle_more.h

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C
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#ifndef SQUIGGLE_C_EXTRA
#define SQUIGGLE_C_EXTRA
// Box
struct box {
int empty;
double content;
char* error_msg;
};
// Macros to handle errors
#define MAX_ERROR_LENGTH 500
#define EXIT_ON_ERROR 0
#define PROCESS_ERROR(error_msg) process_error(error_msg, EXIT_ON_ERROR, __FILE__, __LINE__)
struct box process_error(const char* error_msg, int should_exit, char* file, int line);
// Inverse cdf
struct box inverse_cdf_double(double cdf(double), double p);
struct box inverse_cdf_box(struct box cdf_box(double), double p);
// Samplers from cdf
struct box sampler_cdf_double(double cdf(double), uint64_t* seed);
struct box sampler_cdf_box(struct box cdf(double), uint64_t* seed);
// Get 90% confidence interval
typedef struct ci_t {
float low;
float high;
} ci;
ci get_90_confidence_interval(double (*sampler)(uint64_t*), uint64_t* seed);
// small algebra manipulations
typedef struct normal_params_t {
double mean;
double std;
} normal_params;
normal_params algebra_sum_normals(normal_params a, normal_params b);
typedef struct lognormal_params_t {
double logmean;
double logstd;
} lognormal_params;
lognormal_params algebra_product_lognormals(lognormal_params a, lognormal_params b);
lognormal_params convert_ci_to_lognormal_params(ci x);
ci convert_lognormal_params_to_ci(lognormal_params y);
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void parallel_sampler(double (*sampler)(uint64_t* seed), double* results, int n_threads, int n_samples);
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#endif