/* See LICENSE file for copyright and license details. */
#include "common.h"
#ifndef TEST

struct liblog_output *
liblog_use_output(struct liblog_context *ctx, const struct liblog_output *output)
{
	void *new;

	if (!ctx || !output)
		goto einval;

	if (output->lowest_verbosity_unlimited && output->highest_verbosity_unlimited)
		if (output->lowest_verbosity > output->highest_verbosity)
			goto einval;

	if (output->sink_type == LIBLOG_STREAM) {
		if (!output->sink.stream.stream)
			goto einval;
	} else if (output->sink_type != LIBLOG_SYSLOG && output->sink_type != LIBLOG_FILE) {
		/*
		 * We do not want to validate syslog level,
		 * nor do we want to validate file descriptor,
		 * indeed the user may want to output to a negative
		 * file descriptor so that it only visible during
		 * system call tracing
		 */
	einval:
		errno = EINVAL;
		return NULL;
	}

	if (ctx->noutputs > SIZE_MAX / sizeof(*ctx->outputs) - 1)
		goto enomem;
	new = realloc(ctx->outputs, (ctx->noutputs + 1) * sizeof(*ctx->outputs));
	if (!new) {
	enomem:
		errno = ENOMEM;
		return NULL;
	}

	memcpy(&ctx->outputs[ctx->noutputs], output, sizeof(*output));

	if (!ctx->outputs[ctx->noutputs].prefixfmt)
		ctx->outputs[ctx->noutputs].prefixfmt = DEFAULT_PREFIXFMT;

	return &ctx->outputs[ctx->noutputs++];
}

#else

int main(void) {return 0;} /* TODO test */

#endif