# streams.c
Funtions for handling input and output streams.

---

## Includes
```c
#include <stdio.h>

#include "io.h"
```

---

## Function Descriptions

### `io_open`
Opens input and output streams based on provided file paths.
if input_path is NULL, stdin is used.
if output_path is NULL, stdout is used.

#### Parameters
- `io`: Pointer to the t_io structure to hold the opened streams.
- `input_path`: Path to the input file, or NULL for stdin.
- `output_path`: Path to the output file, or NULL for stdout.

#### Return Value
Returns 0 on success, or 1 on failure.
The caller is responsible for closing the streams using `io_close`.

#### Implementation
```c
int8_t
io_open(t_io *io, const char *input_path, const char *output_path)
{
	io->in = (NULL != input_path) ? fopen(input_path, "r") : stdin;
	if (NULL == io->in)
	{
		perror(input_path);
		return (1);
	}
	io->out = (NULL != output_path) ? fopen(output_path, "w") : stdout;
	if (NULL == io->out)
	{
		perror(output_path);
		if (io->in != stdin)
			fclose(io->in);
		return (1);
	}
	return (0);
}
```

### `io_close`
Closes the input and output streams if they are not stdin or stdout.

#### Parameters
- `io`: Pointer to the t_io structure containing the streams to close.

#### Implementation
```c
void
io_close(t_io *io)
{
	if (NULL != io->in && io->in != stdin)
		fclose(io->in);
	if (NULL != io->out && io->out != stdout)
		fclose(io->out);
}
```