Function cbm_mmap_read

src/foundation/platform.c:42–80

#include "foundation/win_utf8.h"

void *cbm_mmap_read(const char *path, size_t *out_size) {
    if (!path || !out_size) {
        return NULL;
    }
    *out_size = 0;

    wchar_t *wpath = cbm_utf8_to_wide(path);
    if (!wpath) {
        return NULL;
    }

    HANDLE file = CreateFileW(wpath, GENERIC_READ, FILE_SHARE_READ, NULL, OPEN_EXISTING,
                              FILE_ATTRIBUTE_NORMAL, NULL);
    if (file == INVALID_HANDLE_VALUE) {
        free(wpath);
        return NULL;
    }
    LARGE_INTEGER sz;
    if (!GetFileSizeEx(file, &sz) || sz.QuadPart == 0) {
        CloseHandle(file);
        free(wpath);
        return NULL;
    }
    HANDLE mapping = CreateFileMappingW(file, NULL, PAGE_READONLY, 0, 0, NULL);
    if (!mapping) {
        CloseHandle(file);
        free(wpath);
        return NULL;
    }
    void *addr = MapViewOfFile(mapping, FILE_MAP_READ, 0, 0, 0);
    CloseHandle(mapping);
    CloseHandle(file);
    free(wpath);
    if (!addr) {
        return NULL;
    }
    *out_size = (size_t)sz.QuadPart;
    return addr;
}

void cbm_munmap(void *addr, size_t size) {
    (void)size;