#include <stdlib.h>
#include <string.h>
#include <stdio.h>

#include "util.h"

void eprintf(const char *format, ...) {
	// send that shi to stderr
    va_list args;
    va_start(args, format);
    vfprintf(stderr, format, args);
    va_end(args);
}

void error_out(const char *format, ...) {
    va_list args;
    va_start(args, format);
    vfprintf(stderr, format, args);
    va_end(args);
	fprintf(stderr, "\n");
	exit(1);
}

void* emalloc(size_t size, char* alloc_reason) {
	void* d = malloc(size);
	if (d == NULL) error_out("Failed to allocate %s", alloc_reason);
	return d;
}

char* vastrcat_(int dummy, ...) {

    va_list args;
    va_list args2;
    va_start(args, dummy);
	va_copy(args2, args);

	// get len of output string
	size_t len = 0;
    while (1) {
        char* arg = va_arg(args, char*);
        if (!arg) break;
		len += strlen(arg);
    }
    va_end(args);

	// allocate and build output
	char* output = malloc(len + 1);
	char* p = output;
    while (1) {
        char* arg = va_arg(args2, char*);
        if (!arg) break;
		memcpy(p, arg, strlen(arg));
		p += strlen(arg);
    }
    va_end(args2);

	return output;
}