/*
-
-buffer.c
-
-Author: Tatu Ylonen <ylo@cs.hut.fi>
-
-Copyright (c) 1995 Tatu Ylonen <ylo@cs.hut.fi>, Espoo, Finland
- All rights reserved
-
-Created: Sat Mar 18 04:15:33 1995 ylo
-
-Functions for manipulating fifo buffers (that can grow if needed).
-
-*/
+ *
+ * buffer.c
+ *
+ * Author: Tatu Ylonen <ylo@cs.hut.fi>
+ *
+ * Copyright (c) 1995 Tatu Ylonen <ylo@cs.hut.fi>, Espoo, Finland
+ * All rights reserved
+ *
+ * Created: Sat Mar 18 04:15:33 1995 ylo
+ *
+ * Functions for manipulating fifo buffers (that can grow if needed).
+ *
+ */
#include "includes.h"
RCSID("$Id$");
/* Initializes the buffer structure. */
-void buffer_init(Buffer *buffer)
+void
+buffer_init(Buffer *buffer)
{
- buffer->alloc = 4096;
- buffer->buf = xmalloc(buffer->alloc);
- buffer->offset = 0;
- buffer->end = 0;
+ buffer->alloc = 4096;
+ buffer->buf = xmalloc(buffer->alloc);
+ buffer->offset = 0;
+ buffer->end = 0;
}
/* Frees any memory used for the buffer. */
-void buffer_free(Buffer *buffer)
+void
+buffer_free(Buffer *buffer)
{
- memset(buffer->buf, 0, buffer->alloc);
- xfree(buffer->buf);
+ memset(buffer->buf, 0, buffer->alloc);
+ xfree(buffer->buf);
}
/* Clears any data from the buffer, making it empty. This does not actually
zero the memory. */
-void buffer_clear(Buffer *buffer)
+void
+buffer_clear(Buffer *buffer)
{
- buffer->offset = 0;
- buffer->end = 0;
+ buffer->offset = 0;
+ buffer->end = 0;
}
/* Appends data to the buffer, expanding it if necessary. */
-void buffer_append(Buffer *buffer, const char *data, unsigned int len)
+void
+buffer_append(Buffer *buffer, const char *data, unsigned int len)
{
- char *cp;
- buffer_append_space(buffer, &cp, len);
- memcpy(cp, data, len);
+ char *cp;
+ buffer_append_space(buffer, &cp, len);
+ memcpy(cp, data, len);
}
/* Appends space to the buffer, expanding the buffer if necessary.
This does not actually copy the data into the buffer, but instead
returns a pointer to the allocated region. */
-void buffer_append_space(Buffer *buffer, char **datap, unsigned int len)
+void
+buffer_append_space(Buffer *buffer, char **datap, unsigned int len)
{
- /* If the buffer is empty, start using it from the beginning. */
- if (buffer->offset == buffer->end)
- {
- buffer->offset = 0;
- buffer->end = 0;
- }
-
- restart:
- /* If there is enough space to store all data, store it now. */
- if (buffer->end + len < buffer->alloc)
- {
- *datap = buffer->buf + buffer->end;
- buffer->end += len;
- return;
- }
-
- /* If the buffer is quite empty, but all data is at the end, move the
- data to the beginning and retry. */
- if (buffer->offset > buffer->alloc / 2)
- {
- memmove(buffer->buf, buffer->buf + buffer->offset,
- buffer->end - buffer->offset);
- buffer->end -= buffer->offset;
- buffer->offset = 0;
- goto restart;
- }
-
- /* Increase the size of the buffer and retry. */
- buffer->alloc += len + 32768;
- buffer->buf = xrealloc(buffer->buf, buffer->alloc);
- goto restart;
+ /* If the buffer is empty, start using it from the beginning. */
+ if (buffer->offset == buffer->end) {
+ buffer->offset = 0;
+ buffer->end = 0;
+ }
+restart:
+ /* If there is enough space to store all data, store it now. */
+ if (buffer->end + len < buffer->alloc) {
+ *datap = buffer->buf + buffer->end;
+ buffer->end += len;
+ return;
+ }
+ /* If the buffer is quite empty, but all data is at the end, move
+ the data to the beginning and retry. */
+ if (buffer->offset > buffer->alloc / 2) {
+ memmove(buffer->buf, buffer->buf + buffer->offset,
+ buffer->end - buffer->offset);
+ buffer->end -= buffer->offset;
+ buffer->offset = 0;
+ goto restart;
+ }
+ /* Increase the size of the buffer and retry. */
+ buffer->alloc += len + 32768;
+ buffer->buf = xrealloc(buffer->buf, buffer->alloc);
+ goto restart;
}
/* Returns the number of bytes of data in the buffer. */
-unsigned int buffer_len(Buffer *buffer)
+unsigned int
+buffer_len(Buffer *buffer)
{
- return buffer->end - buffer->offset;
+ return buffer->end - buffer->offset;
}
/* Gets data from the beginning of the buffer. */
-void buffer_get(Buffer *buffer, char *buf, unsigned int len)
+void
+buffer_get(Buffer *buffer, char *buf, unsigned int len)
{
- if (len > buffer->end - buffer->offset)
- fatal("buffer_get trying to get more bytes than in buffer");
- memcpy(buf, buffer->buf + buffer->offset, len);
- buffer->offset += len;
+ if (len > buffer->end - buffer->offset)
+ fatal("buffer_get trying to get more bytes than in buffer");
+ memcpy(buf, buffer->buf + buffer->offset, len);
+ buffer->offset += len;
}
/* Consumes the given number of bytes from the beginning of the buffer. */
-void buffer_consume(Buffer *buffer, unsigned int bytes)
+void
+buffer_consume(Buffer *buffer, unsigned int bytes)
{
- if (bytes > buffer->end - buffer->offset)
- fatal("buffer_get trying to get more bytes than in buffer");
- buffer->offset += bytes;
-}
+ if (bytes > buffer->end - buffer->offset)
+ fatal("buffer_get trying to get more bytes than in buffer");
+ buffer->offset += bytes;
+}
/* Consumes the given number of bytes from the end of the buffer. */
-void buffer_consume_end(Buffer *buffer, unsigned int bytes)
+void
+buffer_consume_end(Buffer *buffer, unsigned int bytes)
{
- if (bytes > buffer->end - buffer->offset)
- fatal("buffer_get trying to get more bytes than in buffer");
- buffer->end -= bytes;
-}
+ if (bytes > buffer->end - buffer->offset)
+ fatal("buffer_get trying to get more bytes than in buffer");
+ buffer->end -= bytes;
+}
/* Returns a pointer to the first used byte in the buffer. */
-char *buffer_ptr(Buffer *buffer)
+char *
+buffer_ptr(Buffer *buffer)
{
- return buffer->buf + buffer->offset;
+ return buffer->buf + buffer->offset;
}
/* Dumps the contents of the buffer to stderr. */
-void buffer_dump(Buffer *buffer)
+void
+buffer_dump(Buffer *buffer)
{
- int i;
- unsigned char *ucp = (unsigned char *)buffer->buf;
-
- for (i = buffer->offset; i < buffer->end; i++)
- fprintf(stderr, " %02x", ucp[i]);
- fprintf(stderr, "\n");
+ int i;
+ unsigned char *ucp = (unsigned char *) buffer->buf;
+
+ for (i = buffer->offset; i < buffer->end; i++)
+ fprintf(stderr, " %02x", ucp[i]);
+ fprintf(stderr, "\n");
}
andersk / openssh.git / blobdiff