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#include "sys.h"
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));
}
void die(const char *error_string, ...)
{
va_list args;
va_start(args, error_string);
printf("error: ");
vprintf(error_string, args);
printf("\n");
va_end(args);
exit(1);
}
void info(const char *format, ...)
{
va_list args;
va_start(args, format);
vprintf(format, args);
putchar('\n');
va_end(args);
}
char *read_entire_file(struct arena *arena, u64 *len, const char *filename)
{
HANDLE file = CreateFile(filename, GENERIC_READ, FILE_SHARE_READ,
0, OPEN_EXISTING, FILE_ATTRIBUTE_NORMAL, 0);
if (file == INVALID_HANDLE_VALUE)
return 0;
LARGE_INTEGER lisize;
if (!GetFileSizeEx(file, &lisize))
goto error;
*len = lisize.QuadPart;
if (!*len)
goto error;
char *buffer = push_arena(arena, *len + 1);
DWORD bytes_read;
if (!ReadFile(file, *buffer, size, &bytes_read, 0)) {
pop_arena(arena, *len + 1);
goto error;
}
CloseHandle(file);
buffer[*len] = 0;
return buffer;
error:
CloseHandle(file);
return 0;
}
char *get_exe_path(arena_t *arena)
{
char path[max_path_len] = {0};
u32 len = GetModuleFileName(0, path, max_path_len);
if (!len)
return 0;
char *dir = strrchr(path, '\\');
if (!dir)
return path;
len = dir - path;
dir = push_arena(arena, len + 1);
memmove(dir, path, len);
dir[len] = 0;
return dir;
}
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