/* * 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_t z_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 */