dttr_util_mem.h

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#ifndef DTTR_UTIL_MEM_H
#define DTTR_UTIL_MEM_H
 
#include <stdbool.h>
#include <stddef.h>
#include <stdint.h>
#ifndef DTTR_SDK_ENABLE_UNSTABLE
#error "Define DTTR_SDK_ENABLE_UNSTABLE before including dttr_util_mem.h"
#endif
 
#ifdef _WIN32
#include <windows.h>
#endif
 
#ifdef __cplusplus
extern "C" {
#endif

static inline bool DTTR_Util_MemReadable(const void *ptr, size_t size) {
    if (!ptr || size == 0) {
        return false;
    }
 
#ifdef _WIN32
    MEMORY_BASIC_INFORMATION mbi;
    if (VirtualQuery(ptr, &mbi, sizeof(mbi)) == 0) {
        return false;
    }
 
    const uintptr_t start = (uintptr_t)ptr;
    const uintptr_t end = start + size;
    const uintptr_t region_end = (uintptr_t)mbi.BaseAddress + mbi.RegionSize;
    const DWORD bad = PAGE_NOACCESS | PAGE_GUARD;
    return end >= start && end <= region_end && mbi.State == MEM_COMMIT
           && (mbi.Protect & bad) == 0;
#else
    // On non-Windows builds this stub treats every range as readable.
    return true;
#endif
}
 
#ifdef __cplusplus
}
#endif
 
#endif // DTTR_UTIL_MEM_H