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void *sys_alloc(u64 length)
{
assert(length);
void *result = VirtualAlloc(0, length, MEM_COMMIT|MEM_RESERVE, PAGE_READWRITE);
return result;
}
void sys_free(void *memory, u64 length)
{
assert(memory);
assert(length);
assert(VirtualFree(memory, 0, MEM_RELEASE));
}
u64 sys_read_file(arena_t *arena, char **buffer, const char *filename)
{
*buffer = 0;
HANDLE file = CreateFile(filename, GENERIC_READ, FILE_SHARE_READ,
0, OPEN_EXISTING, FILE_ATTRIBUTE_NORMAL, 0);
if (file == INVALID_HANDLE_VALUE) {
printf("error: failed to open file \"%s\"\n", filename);
return 0;
}
LARGE_INTEGER lisize;
if (!GetFileSizeEx(file, &lisize)) {
printf("error: failed to get size of the file \"%s\"", filename);
CloseHandle(file);
return 0;
}
u64 size = lisize.QuadPart;
if (!size) {
printf("error: file \"%s\" is empty", filename);
CloseHandle(file);
return 0;
}
*buffer = push_arena(arena, size + 1);
DWORD bytes_read;
if (!ReadFile(file, *buffer, size, &bytes_read, 0)) {
CloseHandle(file);
pop_arena(arena, size);
printf("error: failed to read file \"%s\", bytes read: %lu\n", filename, bytes_read);
return 0;
}
CloseHandle(file);
*(*buffer + size) = 0;
return size + 1;
}
char *sys_getbindir(arena_t *arena)
{
char path[MAX_PATH];
u32 len = GetModuleFileName(0, path, MAX_PATH);
if (!len) {
printf("error: failed to get file path\n");
return 0;
}
char *dir = strrchr(path, '\\');
assert(dir);
assert(dir > path);
len = dir - path;
dir = push_arena(arena, len + 1);
prb_memmove(dir, path, len);
dir[len] = 0;
return dir;
}
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