#include <stdlib.h>
#include <string.h>
#include <stdint.h>
#include <stdarg.h>
#include <assert.h>

#include "util.h"
#define __FILENAME__ "util.c"
#include "dbg.h"

#include "../config.h"

/* A safe malloc wrapper. */
void *ec_malloc(size_t size) {
    void *ptr = malloc(size);
    if(ptr == NULL)
		fatal("redo: cannot allocate %zu bytes", size);
	
    return ptr;
}

/* For concating multiple strings into a single larger one. */
char *concat(size_t count, ...) {
	assert(count > 0);
	va_list ap, ap2;
	va_start(ap, count);
	va_copy(ap2, ap);
	size_t i, size = 0, args_len[count];
	for (i = 0; i < count; ++i) {
		args_len[i] = strlen(va_arg(ap, char*));
		size += args_len[i];
	}
	size++;
	char *result = ec_malloc(size);
	/* debug("Allocated %zu bytes at %p\n", size, result); */
	uintptr_t offset = 0;
	for (i = 0; i < count; ++i) {
		strcpy(&result[offset], va_arg(ap2, char*));
		offset += args_len[i];
	}
	va_end(ap);
	va_end(ap2);
	return result;
}

char *xbasename(const char *path) {
	assert(path);
	char *ptr = strrchr(path, '/');
	return ptr? ptr+1 : (char*) path;
}

char *ec_strdup(const char* str) {
	assert(str);
	size_t len = strlen(str) + 1;
	char *ptr = malloc(len);
	if (!ptr)
		fatal("redo: failed to duplicate string");

	return memcpy(ptr, str, len);;
}