/* * by Scarlett. public domain. * replacements for w3m's allocation macros which add overflow * detection and concentrate the macros in one file */#ifndef W3_ALLOC_H#define W3_ALLOC_H#include <gc.h>#include <stdlib.h>#include <stdio.h>#include <limits.h> static inline size_tz_mult_no_oflow_(size_t n, size_t size){	if (size != 0 && n > ULONG_MAX / size) {		fprintf(stderr,		    "w3m: overflow in malloc, %lu*%lu\n", (unsigned long)n, (unsigned long)size);		exit(1);	}	return n * size;} #define New(type) \	(GC_MALLOC(sizeof(type))) #define NewAtom(type) \	(GC_MALLOC_ATOMIC(sizeof(type))) #define New_N(type, n) \	(GC_MALLOC(z_mult_no_oflow_((n), sizeof(type)))) #define NewAtom_N(type, n) \	(GC_MALLOC_ATOMIC(z_mult_no_oflow_((n), sizeof(type)))) #define New_Reuse(type, ptr, n) \	(GC_REALLOC((ptr), z_mult_no_oflow_((n), sizeof(type)))) #endif /* W3_ALLOC_H */