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#ifndef BASE_OS_H
#define BASE_OS_H
#define STDIN_FD 0
#define STDOUT_FD 1
#define STDERR_FD 2
#define os_write_stdout(buf, count) _os_write(STDOUT_FD, (buf), (count))
#define os_write_stderr(buf, count) _os_write(STDERR_FD, (buf), (count))
#define os_write_stdin(buf, count) _os_write(STDIN_FD, (buf), (count))
#define os_read_stdout(buf)
#ifdef BASE_LOGGING
#define _log(format, ...) os_print_stdout_format((char *)(format), ##__VA_ARGS__)
#define _logs8(buffer) os_write_stdout(buffer.data, buffer.size);
#else
#define _log(buffer)
#define _logs8(buffer)
#endif
internal string8
file_load(mem_arena *arena, const char *path)
{
string8 result = {0};
struct stat sbuf = {0};
s32 file = open(path, O_RDONLY);
if(file == -1)
{
#if 0
_log("file not loaded");
#endif
return (string8){0};
}
if(fstat(file, &sbuf) == -1)
{
close(file);
return (string8){0};
}
result = PushString8(arena, sbuf.st_size);
result.size = (u64)sbuf.st_size;
if(result.size != 0)
{
result.data = (u8 *)mmap(0, result.size, PROT_READ, MAP_PRIVATE, file, 0);
}
close(file);
return result;
}
internal string8
file_write(const char *path, string8 data)
{
string8 result = {0};
s32 file = open(path, O_WRONLY | O_CREAT | O_TRUNC, 0644);
if(file == -1)
{
return (string8){0};
}
u64 written = 0;
while(written < data.size)
{
s64 err = write(file, data.data + written, data.size - written);
if(err == -1)
{
close(file);
return (string8){0};
}
written += err;
}
close(file);
result = data;
return result;
}
#if 1
internal s64
_os_write(int fd, const void *buf, u64 count)
{
return (u64)syscall(SYS_write, (int)fd, buf, count);
}
#endif
#if 0
internal ssize_t
_os_write(int fd, const void *buf, size_t count)
{
return (ssize_t) syscall(SYS_write, fd, buf, count);
}
#endif
internal s64
_os_read(int fd, const void *buf, u64 count)
{
return (u64)syscall(SYS_read, fd, buf, count);
}
internal void
os_print_stdout_format(char *format, ...)
{
va_list arguments;
va_start(arguments, format);
vprintf(format, arguments);
va_end(arguments);
}
#endif /* BASE_OS_H */
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