gemstone/lib/io/io.c

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2024-05-25 11:50:21 +00:00
#include <io/io.h>
#include <stdio.h>
#if defined(_WIN32) || defined (_WIN64)
// Compile for Windows
#include <Windows.h>
// FIXME: error in case GetStdHandle return INVALID_HANDLE_VALUE
// FIXME: error in case functions return 0
void getStdinHandle(handle* stdin) {
*stdin = (handle) GetStdHandle(STD_INPUT_HANDLE);
}
void getStdoutHandle(handle* stdout) {
*stdout = (handle) GetStdHandle(STD_OUTPUT_HANDLE);
}
void getStderrHandle(handle* stderr) {
*stderr = (handle) GetStdHandle(STD_ERROR_HANDLE);
}
void writeBytes(handle dev, u8* buf, u32 len, u32* bytesWritten) {
WriteFile((HANDLE) dev, buf, len, bytesRead, NULL);
}
void readBytes(handle dev, u8* buf, u32 len, u32* bytesRead) {
ReadFile((HANDLE) dev, buf, len, bytesRead, NULL);
}
void flush(handle dev) {
FlushFileBuffers((HANDLE) dev);
}
#elif defined(unix) || defined(__unix) || defined(__unix__) || defined(__linux__)
// Compile for Linux and BSD
#include <unistd.h>
// savely cast a 64-bit pointer down to a 32-bit value
// this assumes that 64-bit system will use 32-bit handles
// which are stored as 64-bit by zero extending
#define TO_INT(x) ((int)(long int)(x))
void getStdinHandle(handle* stdin) {
*stdin = (handle) STDIN_FILENO;
}
void getStdoutHandle(handle* stdout) {
*stdout = (handle) STDOUT_FILENO;
}
void getStderrHandle(handle* stderr) {
*stderr = (handle) STDERR_FILENO;
}
void writeBytes(handle dev, u8* buf, u32 len, u32* bytesWritten) {
*bytesWritten = write(TO_INT(dev), buf, len);
}
void readBytes(handle dev, u8* buf, u32 len, u32* bytesRead) {
*bytesRead = read(TO_INT(dev), buf, len);
}
void flush(handle dev) {
fsync(TO_INT(dev));
}
#endif