/*
* Empire - A multi-player, client/server Internet based war game.
- * Copyright (C) 1986-2006, Dave Pare, Jeff Bailey, Thomas Ruschak,
- * Ken Stevens, Steve McClure
+ * Copyright (C) 1986-2018, Dave Pare, Jeff Bailey, Thomas Ruschak,
+ * Ken Stevens, Steve McClure, Markus Armbruster
*
- * This program is free software; you can redistribute it and/or modify
+ * Empire 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
+ * the Free Software Foundation, either version 3 of the License, or
* (at your option) any later version.
*
* This program is distributed in the hope that it will be useful,
* 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., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
+ * along with this program. If not, see <http://www.gnu.org/licenses/>.
*
* ---
*
* ---
*
* ioqueue.c: Read and write i/o queues
- *
+ *
* Known contributors to this file:
- *
+ *
*/
/*
- * Read and write onto io queues. Note that
- * the io queues don't actually do any writing;
+ * Read and write onto I/O queues. Note that
+ * the I/O queues don't actually do any writing;
* that is left for a higher level.
*/
#include <config.h>
-#include <stdio.h>
-#include <stdlib.h> /* malloc free */
-#include <sys/types.h>
-#if !defined(_WIN32)
+#include <stdlib.h>
+#include <string.h>
#include <sys/uio.h>
-#endif
+#include "ioqueue.h"
#include "misc.h"
#include "queue.h"
-#include "ioqueue.h"
-static int ioqtocbuf(struct ioqueue *ioq, char *buf, int cc,
- register int stopc);
-#if !defined(_WIN32)
-static int ioqtoiov(struct ioqueue *ioq, struct iovec *iov,
- register int max);
-#endif
+struct io {
+ struct emp_qelem queue;
+ int size;
+ int nbytes;
+ int offset;
+ char *data;
+};
+
+struct ioqueue {
+ struct io list;
+ int bufsize;
+ int cc;
+};
+
+static int ioqtocbuf(struct ioqueue *ioq, char *buf, int cc, int stopc);
+static int ioqtoiov(struct ioqueue *ioq, struct iovec *iov, int max);
static int ioqtobuf(struct ioqueue *ioq, char *buf, int cc);
static int appendcc(struct ioqueue *ioq, char *buf, int cc);
-static int removecc(struct ioqueue *ioq, register int cc);
-
-#if defined(_WIN32)
-static void loc_StripDels(char *pBuf);
-#endif
+static int removecc(struct ioqueue *ioq, int cc);
struct ioqueue *
ioq_create(int size)
ioq->list.nbytes = 0;
ioq->list.offset = 0;
ioq->list.size = 0;
- ioq->list.data = 0;
+ ioq->list.data = NULL;
ioq->bufsize = size;
ioq->cc = 0;
return ioq;
* iovec, but don't actually dequeue the data.
* return # of iovec initialized.
*/
-#if !defined(_WIN32)
int
ioq_makeiov(struct ioqueue *ioq, struct iovec *iov, int cc)
{
return 0;
return ioqtoiov(ioq, iov, cc);
}
-#endif
/*
* Copy the specified number of characters into the buffer
return ioqtobuf(ioq, buf, cc);
}
-int
+void
ioq_dequeue(struct ioqueue *ioq, int cc)
{
- return removecc(ioq, cc);
+ int res = removecc(ioq, cc);
+ CANT_HAPPEN(res != cc);
}
void
return appendcc(ioq, buf, strlen(buf));
}
-/*
- * all the rest are local to this module
- */
-
-
/*
* copy cc bytes from ioq to buf.
* this routine doesn't free memory; this is
struct io *io;
struct emp_qelem *qp;
struct emp_qelem *head;
- register int nbytes;
- register int nleft;
+ int nbytes, nleft;
char *offset;
nleft = cc;
* terminating on the stop character.
*/
static int
-ioqtocbuf(struct ioqueue *ioq, char *buf, int cc, register int stopc)
+ioqtocbuf(struct ioqueue *ioq, char *buf, int cc, int stopc)
{
- register int nbytes;
- register s_char *p;
- register int n;
+ int nbytes;
+ char *p;
+ int n;
struct io *io;
struct emp_qelem *qp;
struct emp_qelem *head;
* initialize an iovec to point at max bytes worth
* of data from the ioqueue.
*/
-#if !defined(_WIN32)
static int
-ioqtoiov(struct ioqueue *ioq, struct iovec *iov, register int max)
+ioqtoiov(struct ioqueue *ioq, struct iovec *iov, int max)
{
struct io *io;
- register int cc;
- register int niov;
- register int len;
+ int cc, niov, len;
struct emp_qelem *qp;
cc = max;
}
return niov;
}
-#endif
/*
* append a buffer to the end of the ioq.
{
struct io *io;
int len;
- s_char *ptr;
+ char *ptr;
int avail;
/* determine if any space is left */
/*
* remove cc bytes from ioqueue ioq
- * free memory, dequeue io elements
+ * free memory, dequeue I/O elements
* which are no longer used.
*/
static int
-removecc(struct ioqueue *ioq, register int cc)
+removecc(struct ioqueue *ioq, int cc)
{
struct io *io;
struct emp_qelem *qp;
- register int nbytes;
- register int there;
- register int remain;
+ int nbytes, there, remain;
nbytes = 0;
remain = cc;
ioq->cc -= nbytes;
return nbytes;
}
-
-#if defined(_WIN32)
-/*
- * Make an (output) buffer up to the
- * maximum size of the buffer.
- *
- * We don't free the bytes...
- */
-int
-ioq_makebuf(struct ioqueue *ioq, char *pBuf, int nBufLen)
-{
- struct io *io;
- struct emp_qelem *qp;
- struct emp_qelem *head;
- int nbytes;
- int nleft;
- int ncopied;
- s_char *offset;
-
- ncopied = 0;
- nleft = nBufLen;
- offset = pBuf;
- head = &ioq->list.queue;
-
- for (qp = head->q_forw; (qp != head) && (nleft > 0); qp = qp->q_forw) {
- io = (struct io *)qp;
- nbytes = io->nbytes - io->offset;
- if (nbytes < 0) {
- /* Paranoid check for bad buffer. */
- continue;
- }
-
- /* too many bytes, wait till next time. */
- if (nbytes > nleft)
- break;
-
- memcpy(offset, io->data + io->offset, nbytes);
- offset += nbytes;
- nleft -= nbytes;
- ncopied += nbytes;
- }
- return ncopied;
-}
-#endif /* _WIN32 */
projects / empserver / blobdiff