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#include "shared.h"
#include <errno.h>
#include <stdarg.h>
#include <stdlib.h>
#include <string.h>
void error(const char* format, ...) {
va_list list;
va_start(list, format);
vfprintf(stderr, format, list);
fprintf(stderr, "\n");
exit(EXIT_FAILURE);
}
FILE* get_file(const char* path, const char* type) {
FILE* file = fopen(path, type);
if (file == NULL) {
error("error: failed to open file %s: %s", path, strerror(errno));
}
return file;
}
long int get_number(const char* text) {
char* end;
long int n = strtol(text, &end, 10);
if (text == end) {
error("error: %s is not a valid number", text);
}
return n;
}
bool streql(const char* a, const char* b) {
if (*a != *b) return false;
int n = 0;
while (true) {
if (*(a+n) != *(b+n)) return false;
if (*(a+n) == '\0') return true;
++n;
}
}
bool prefix(const char* pre, const char* str) {
return strncmp(pre, str, strlen(pre)) == 0;
}
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