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Diffstat (limited to '')
-rw-r--r-- | src/client_write.c | 284 |
1 files changed, 0 insertions, 284 deletions
diff --git a/src/client_write.c b/src/client_write.c deleted file mode 100644 index 78cfca8a1..000000000 --- a/src/client_write.c +++ /dev/null @@ -1,284 +0,0 @@ -/* - * Copyright (C) 2003-2011 The Music Player Daemon Project - * http://www.musicpd.org - * - * This program is free software; you can redistribute it and/or modify - * it under the terms of the GNU General Public License as published by - * the Free Software Foundation; either version 2 of the License, or - * (at your option) any later version. - * - * This program is distributed in the hope that it will be useful, - * but WITHOUT ANY WARRANTY; without even the implied warranty of - * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the - * GNU General Public License for more details. - * - * You should have received a copy of the GNU General Public License along - * with this program; if not, write to the Free Software Foundation, Inc., - * 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA. - */ - -#include "config.h" -#include "client_internal.h" - -#include <assert.h> -#include <string.h> -#include <stdio.h> - -static size_t -client_write_deferred_buffer(struct client *client, - const struct deferred_buffer *buffer) -{ - GError *error = NULL; - GIOStatus status; - gsize bytes_written; - - assert(client != NULL); - assert(client->channel != NULL); - assert(buffer != NULL); - - status = g_io_channel_write_chars - (client->channel, buffer->data, buffer->size, - &bytes_written, &error); - switch (status) { - case G_IO_STATUS_NORMAL: - return bytes_written; - - case G_IO_STATUS_AGAIN: - return 0; - - case G_IO_STATUS_EOF: - /* client has disconnected */ - - client_set_expired(client); - return 0; - - case G_IO_STATUS_ERROR: - /* I/O error */ - - client_set_expired(client); - g_warning("failed to flush buffer for %i: %s", - client->num, error->message); - g_error_free(error); - return 0; - } - - /* unreachable */ - return 0; -} - -void -client_write_deferred(struct client *client) -{ - size_t ret; - - while (!g_queue_is_empty(client->deferred_send)) { - struct deferred_buffer *buf = - g_queue_peek_head(client->deferred_send); - - assert(buf->size > 0); - assert(buf->size <= client->deferred_bytes); - - ret = client_write_deferred_buffer(client, buf); - if (ret == 0) - break; - - if (ret < buf->size) { - assert(client->deferred_bytes >= (size_t)ret); - client->deferred_bytes -= ret; - buf->size -= ret; - memmove(buf->data, buf->data + ret, buf->size); - break; - } else { - size_t decr = sizeof(*buf) - - sizeof(buf->data) + buf->size; - - assert(client->deferred_bytes >= decr); - client->deferred_bytes -= decr; - g_free(buf); - g_queue_pop_head(client->deferred_send); - } - - g_timer_start(client->last_activity); - } - - if (g_queue_is_empty(client->deferred_send)) { - g_debug("[%u] buffer empty %lu", client->num, - (unsigned long)client->deferred_bytes); - assert(client->deferred_bytes == 0); - } -} - -static void client_defer_output(struct client *client, - const void *data, size_t length) -{ - size_t alloc; - struct deferred_buffer *buf; - - assert(length > 0); - - alloc = sizeof(*buf) - sizeof(buf->data) + length; - client->deferred_bytes += alloc; - if (client->deferred_bytes > client_max_output_buffer_size) { - g_warning("[%u] output buffer size (%lu) is " - "larger than the max (%lu)", - client->num, - (unsigned long)client->deferred_bytes, - (unsigned long)client_max_output_buffer_size); - /* cause client to close */ - client_set_expired(client); - return; - } - - buf = g_malloc(alloc); - buf->size = length; - memcpy(buf->data, data, length); - - g_queue_push_tail(client->deferred_send, buf); -} - -static void client_write_direct(struct client *client, - const char *data, size_t length) -{ - GError *error = NULL; - GIOStatus status; - gsize bytes_written; - - assert(client != NULL); - assert(client->channel != NULL); - assert(data != NULL); - assert(length > 0); - assert(g_queue_is_empty(client->deferred_send)); - - status = g_io_channel_write_chars(client->channel, data, length, - &bytes_written, &error); - switch (status) { - case G_IO_STATUS_NORMAL: - case G_IO_STATUS_AGAIN: - break; - - case G_IO_STATUS_EOF: - /* client has disconnected */ - - client_set_expired(client); - return; - - case G_IO_STATUS_ERROR: - /* I/O error */ - - client_set_expired(client); - g_warning("failed to write to %i: %s", - client->num, error->message); - g_error_free(error); - return; - } - - if (bytes_written < length) - client_defer_output(client, data + bytes_written, - length - bytes_written); - - if (!g_queue_is_empty(client->deferred_send)) - g_debug("[%u] buffer created", client->num); -} - -void -client_write_output(struct client *client) -{ - if (client_is_expired(client) || !client->send_buf_used) - return; - - if (!g_queue_is_empty(client->deferred_send)) { - client_defer_output(client, client->send_buf, - client->send_buf_used); - - if (client_is_expired(client)) - return; - - /* try to flush the deferred buffers now; the current - server command may take too long to finish, and - meanwhile try to feed output to the client, - otherwise it will time out. One reason why - deferring is slow might be that currently each - client_write() allocates a new deferred buffer. - This should be optimized after MPD 0.14. */ - client_write_deferred(client); - } else - client_write_direct(client, client->send_buf, - client->send_buf_used); - - client->send_buf_used = 0; -} - -/** - * Write a block of data to the client. - */ -static void client_write(struct client *client, const char *buffer, size_t buflen) -{ - /* if the client is going to be closed, do nothing */ - if (client_is_expired(client)) - return; - - while (buflen > 0 && !client_is_expired(client)) { - size_t copylen; - - assert(client->send_buf_used < sizeof(client->send_buf)); - - copylen = sizeof(client->send_buf) - client->send_buf_used; - if (copylen > buflen) - copylen = buflen; - - memcpy(client->send_buf + client->send_buf_used, buffer, - copylen); - buflen -= copylen; - client->send_buf_used += copylen; - buffer += copylen; - if (client->send_buf_used >= sizeof(client->send_buf)) - client_write_output(client); - } -} - -void client_puts(struct client *client, const char *s) -{ - client_write(client, s, strlen(s)); -} - -void client_vprintf(struct client *client, const char *fmt, va_list args) -{ -#ifndef G_OS_WIN32 - va_list tmp; - int length; - char *buffer; - - va_copy(tmp, args); - length = vsnprintf(NULL, 0, fmt, tmp); - va_end(tmp); - - if (length <= 0) - /* wtf.. */ - return; - - buffer = g_malloc(length + 1); - vsnprintf(buffer, length + 1, fmt, args); - client_write(client, buffer, length); - g_free(buffer); -#else - /* On mingw32, snprintf() expects a 64 bit integer instead of - a "long int" for "%li". This is not consistent with our - expectation, so we're using plain sprintf() here, hoping - the static buffer is large enough. Sorry for this hack, - but WIN32 development is so painful, I'm not in the mood to - do it properly now. */ - - static char buffer[4096]; - vsprintf(buffer, fmt, args); - client_write(client, buffer, strlen(buffer)); -#endif -} - -G_GNUC_PRINTF(2, 3) void client_printf(struct client *client, const char *fmt, ...) -{ - va_list args; - - va_start(args, fmt); - client_vprintf(client, fmt, args); - va_end(args); -} |