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Diffstat (limited to 'camel/camel-stream-buffer.c')
| -rw-r--r-- | camel/camel-stream-buffer.c | 470 |
1 files changed, 0 insertions, 470 deletions
diff --git a/camel/camel-stream-buffer.c b/camel/camel-stream-buffer.c deleted file mode 100644 index fe3458a93f..0000000000 --- a/camel/camel-stream-buffer.c +++ /dev/null @@ -1,470 +0,0 @@ -/* -*- Mode: C; tab-width: 8; indent-tabs-mode: t; c-basic-offset: 8; fill-column: 160 -*- */ - -/* camel-stream-buffer.c : Buffer any other other stream - * - * Authors: Michael Zucchi <notzed@ximian.com> - * - * Copyright 1999, 2000 Ximian, Inc. (www.ximian.com) - * - * This program is free software; you can redistribute it and/or - * modify it under the terms of version 2 of the GNU General Public - * License as published by the Free Software Foundation. - * - * 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., 59 Temple Place, Suite 330, Boston, MA 02111-1307 - * USA - */ - -#ifdef HAVE_CONFIG_H -#include <config.h> -#endif - -#include <string.h> -#include <sys/types.h> -#include <sys/stat.h> -#include <fcntl.h> -#include <errno.h> -#include "camel-stream-buffer.h" - -static CamelStreamClass *parent_class = NULL; - -enum { - BUF_USER = 1<<0, /* user-supplied buffer, do not free */ -}; - -#define BUF_SIZE 1024 - -static ssize_t stream_read (CamelStream *stream, char *buffer, size_t n); -static ssize_t stream_write (CamelStream *stream, const char *buffer, size_t n); -static int stream_flush (CamelStream *stream); -static int stream_close (CamelStream *stream); -static gboolean stream_eos (CamelStream *stream); - -static void init_vbuf(CamelStreamBuffer *sbf, CamelStream *s, CamelStreamBufferMode mode, char *buf, guint32 size); -static void init(CamelStreamBuffer *sbuf, CamelStream *s, CamelStreamBufferMode mode); - -static void -camel_stream_buffer_class_init (CamelStreamBufferClass *camel_stream_buffer_class) -{ - CamelStreamClass *camel_stream_class = CAMEL_STREAM_CLASS (camel_stream_buffer_class); - - parent_class = CAMEL_STREAM_CLASS (camel_type_get_global_classfuncs (camel_stream_get_type ())); - - /* virtual method definition */ - camel_stream_buffer_class->init = init; - camel_stream_buffer_class->init_vbuf = init_vbuf; - - /* virtual method overload */ - camel_stream_class->read = stream_read; - camel_stream_class->write = stream_write; - camel_stream_class->flush = stream_flush; - camel_stream_class->close = stream_close; - camel_stream_class->eos = stream_eos; -} - -static void -camel_stream_buffer_init (gpointer object, gpointer klass) -{ - CamelStreamBuffer *sbf = CAMEL_STREAM_BUFFER (object); - - sbf->flags = 0; - sbf->size = BUF_SIZE; - sbf->buf = g_malloc(BUF_SIZE); - sbf->ptr = sbf->buf; - sbf->end = sbf->buf; - sbf->mode = CAMEL_STREAM_BUFFER_READ | CAMEL_STREAM_BUFFER_BUFFER; - sbf->stream = 0; - sbf->linesize = 80; - sbf->linebuf = g_malloc(sbf->linesize); -} - -static void -camel_stream_buffer_finalize (CamelObject *object) -{ - CamelStreamBuffer *sbf = CAMEL_STREAM_BUFFER (object); - - if (!(sbf->flags & BUF_USER)) { - g_free(sbf->buf); - } - if (sbf->stream) - camel_object_unref(CAMEL_OBJECT(sbf->stream)); - - g_free(sbf->linebuf); -} - - -CamelType -camel_stream_buffer_get_type (void) -{ - static CamelType camel_stream_buffer_type = CAMEL_INVALID_TYPE; - - if (camel_stream_buffer_type == CAMEL_INVALID_TYPE) { - camel_stream_buffer_type = camel_type_register (camel_stream_get_type (), "CamelStreamBuffer", - sizeof (CamelStreamBuffer), - sizeof (CamelStreamBufferClass), - (CamelObjectClassInitFunc) camel_stream_buffer_class_init, - NULL, - (CamelObjectInitFunc) camel_stream_buffer_init, - (CamelObjectFinalizeFunc) camel_stream_buffer_finalize); - } - - return camel_stream_buffer_type; -} - - -static void -set_vbuf(CamelStreamBuffer *sbf, char *buf, CamelStreamBufferMode mode, int size) -{ - if (sbf->buf && !(sbf->flags & BUF_USER)) { - g_free(sbf->buf); - } - if (buf) { - sbf->buf = buf; - sbf->flags |= BUF_USER; - } else { - sbf->buf = g_malloc(size); - sbf->flags &= ~BUF_USER; - } - sbf->size = size; - sbf->mode = mode; -} - -static void -init_vbuf(CamelStreamBuffer *sbf, CamelStream *s, CamelStreamBufferMode mode, char *buf, guint32 size) -{ - set_vbuf(sbf, buf, mode, size); - if (sbf->stream) - camel_object_unref(CAMEL_OBJECT(sbf->stream)); - sbf->stream = s; - camel_object_ref(CAMEL_OBJECT(sbf->stream)); -} - -static void -init(CamelStreamBuffer *sbuf, CamelStream *s, CamelStreamBufferMode mode) -{ - init_vbuf(sbuf, s, mode, NULL, BUF_SIZE); -} - - -/** - * camel_stream_buffer_new: - * @stream: Existing stream to buffer. - * @mode: Operational mode of buffered stream. - * - * Create a new buffered stream of another stream. A default - * buffer size (1024 bytes), automatically managed will be used - * for buffering. - * - * See camel_stream_buffer_new_with_vbuf() for details on the - * @mode parameter. - * - * Return value: A newly created buffered stream. - **/ -CamelStream * -camel_stream_buffer_new (CamelStream *stream, CamelStreamBufferMode mode) -{ - CamelStreamBuffer *sbf; - sbf = CAMEL_STREAM_BUFFER (camel_object_new (camel_stream_buffer_get_type ())); - CAMEL_STREAM_BUFFER_CLASS (CAMEL_OBJECT_GET_CLASS(sbf))->init (sbf, stream, mode); - - return CAMEL_STREAM (sbf); -} - -/** - * camel_stream_buffer_new_with_vbuf: - * @stream: An existing stream to buffer. - * @mode: Mode to buffer in. - * @buf: Memory to use for buffering. - * @size: Size of buffer to use. - * - * Create a new stream which buffers another stream, @stream. - * - * The following values are available for @mode: - * - * CAMEL_STREAM_BUFFER_BUFFER, Buffer the input/output in blocks. - * CAMEL_STREAM_BUFFER_NEWLINE, Buffer on newlines (for output). - * CAMEL_STREAM_BUFFER_NONE, Perform no buffering. - * - * Note that currently this is ignored and CAMEL_STREAM_BUFFER_BUFFER - * is always used. - * - * In addition, one of the following mode options should be or'd - * together with the buffering mode: - * - * CAMEL_STREAM_BUFFER_WRITE, Buffer in write mode. - * CAMEL_STREAM_BUFFER_READ, Buffer in read mode. - * - * Buffering can only be done in one direction for any - * buffer instance. - * - * If @buf is non-NULL, then use the memory pointed to - * (for upto @size bytes) as the buffer for all buffering - * operations. It is upto the application to free this buffer. - * If @buf is NULL, then allocate and manage @size bytes - * for all buffering. - * - * Return value: A new stream with buffering applied. - **/ -CamelStream *camel_stream_buffer_new_with_vbuf (CamelStream *stream, CamelStreamBufferMode mode, char *buf, guint32 size) -{ - CamelStreamBuffer *sbf; - sbf = CAMEL_STREAM_BUFFER (camel_object_new (camel_stream_buffer_get_type ())); - CAMEL_STREAM_BUFFER_CLASS (CAMEL_OBJECT_GET_CLASS(sbf))->init_vbuf (sbf, stream, mode, buf, size); - - return CAMEL_STREAM (sbf); -} - -static ssize_t -stream_read (CamelStream *stream, char *buffer, size_t n) -{ - CamelStreamBuffer *sbf = CAMEL_STREAM_BUFFER (stream); - ssize_t bytes_read = 1; - ssize_t bytes_left; - char *bptr = buffer; - - g_return_val_if_fail( (sbf->mode & CAMEL_STREAM_BUFFER_MODE) == CAMEL_STREAM_BUFFER_READ, 0); - - while (n && bytes_read > 0) { - bytes_left = sbf->end - sbf->ptr; - if (bytes_left < n) { - if (bytes_left > 0) { - memcpy(bptr, sbf->ptr, bytes_left); - n -= bytes_left; - bptr += bytes_left; - sbf->ptr += bytes_left; - } - /* if we are reading a lot, then read directly to the destination buffer */ - if (n >= sbf->size/3) { - bytes_read = camel_stream_read(sbf->stream, bptr, n); - if (bytes_read>0) { - n -= bytes_read; - bptr += bytes_read; - } - } else { - bytes_read = camel_stream_read(sbf->stream, sbf->buf, sbf->size); - if (bytes_read>0) { - size_t bytes_used = bytes_read > n ? n : bytes_read; - sbf->ptr = sbf->buf; - sbf->end = sbf->buf+bytes_read; - memcpy(bptr, sbf->ptr, bytes_used); - sbf->ptr += bytes_used; - bptr += bytes_used; - n -= bytes_used; - } - } - } else { - memcpy(bptr, sbf->ptr, n); - sbf->ptr += n; - bptr += n; - n = 0; - } - } - - return (ssize_t)(bptr - buffer); -} - -/* only returns the number passed in, or -1 on an error */ -static ssize_t -stream_write_all(CamelStream *stream, const char *buffer, size_t n) -{ - size_t left = n, w; - - while (left > 0) { - w = camel_stream_write(stream, buffer, left); - if (w == -1) - return -1; - left -= w; - buffer += w; - } - - return n; -} - -static ssize_t -stream_write (CamelStream *stream, const char *buffer, size_t n) -{ - CamelStreamBuffer *sbf = CAMEL_STREAM_BUFFER (stream); - ssize_t total = n; - ssize_t left, todo; - - g_return_val_if_fail( (sbf->mode & CAMEL_STREAM_BUFFER_MODE) == CAMEL_STREAM_BUFFER_WRITE, 0); - - /* first, copy as much as we can */ - left = sbf->size - (sbf->ptr-sbf->buf); - todo = MIN(left, n); - - memcpy(sbf->ptr, buffer, todo); - n -= todo; - buffer += todo; - sbf->ptr += todo; - - /* if we've filled the buffer, write it out, reset buffer */ - if (left == todo) { - if (stream_write_all(sbf->stream, sbf->buf, sbf->size) == -1) - return -1; - - sbf->ptr = sbf->buf; - } - - /* if we still have more, write directly, or copy to buffer */ - if (n > 0) { - if (n >= sbf->size/3) { - if (stream_write_all(sbf->stream, buffer, n) == -1) - return -1; - } else { - memcpy(sbf->ptr, buffer, n); - sbf->ptr += n; - } - } - - return total; -} - -static int -stream_flush (CamelStream *stream) -{ - CamelStreamBuffer *sbf = CAMEL_STREAM_BUFFER (stream); - - if ((sbf->mode & CAMEL_STREAM_BUFFER_MODE) == CAMEL_STREAM_BUFFER_WRITE) { - int len = sbf->ptr-sbf->buf; - int written = camel_stream_write(sbf->stream, sbf->buf, len); - if (written > 0) - sbf->ptr += written; - if (written != len) - return -1; - } else { - /* nothing to do for read mode 'flush' */ - } - - return camel_stream_flush(sbf->stream); -} - -static int -stream_close (CamelStream *stream) -{ - CamelStreamBuffer *sbf = CAMEL_STREAM_BUFFER (stream); - - if (stream_flush(stream) == -1) - return -1; - return camel_stream_close(sbf->stream); -} - -static gboolean -stream_eos (CamelStream *stream) -{ - CamelStreamBuffer *sbf = CAMEL_STREAM_BUFFER (stream); - - return camel_stream_eos(sbf->stream) && sbf->ptr == sbf->end; -} - -/** - * camel_stream_buffer_gets: - * @sbf: A CamelStreamBuffer. - * @buf: Memory to write the string to. - * @max: Maxmimum number of characters to store. - * - * Read a line of characters up to the next newline character or - * @max-1 characters. - * - * If the newline character is encountered, then it will be - * included in the buffer @buf. The buffer will be #NUL terminated. - * - * Return value: The number of characters read, or 0 for end of file, - * and -1 on error. - **/ -int camel_stream_buffer_gets(CamelStreamBuffer *sbf, char *buf, unsigned int max) -{ - register char *outptr, *inptr, *inend, c, *outend; - int bytes_read; - - outptr = buf; - inptr = sbf->ptr; - inend = sbf->end; - outend = buf+max-1; /* room for NUL */ - - do { - while (inptr<inend && outptr<outend) { - c = *inptr++; - *outptr++ = c; - if (c == '\n') { - *outptr = 0; - sbf->ptr = inptr; - return outptr-buf; - } - } - if (outptr == outend) - break; - - bytes_read = camel_stream_read (sbf->stream, sbf->buf, sbf->size); - if (bytes_read == -1) { - if (buf == outptr) - return -1; - else - bytes_read = 0; - } - inptr = sbf->ptr = sbf->buf; - inend = sbf->end = sbf->buf + bytes_read; - } while (bytes_read>0); - - sbf->ptr = inptr; - *outptr = 0; - - return (int)(outptr - buf); -} - -/** - * camel_stream_buffer_read_line: read a complete line from the stream - * @sbf: A CamelStreamBuffer - * - * This function reads a complete newline-terminated line from the stream - * and returns it in allocated memory. The trailing newline (and carriage - * return if any) are not included in the returned string. - * - * Return value: the line read, which the caller must free when done with, - * or NULL on eof. If an error occurs, @ex will be set. - **/ -char * -camel_stream_buffer_read_line (CamelStreamBuffer *sbf) -{ - unsigned char *p; - int nread; - - p = sbf->linebuf; - - while (1) { - nread = camel_stream_buffer_gets (sbf, p, sbf->linesize - (p - sbf->linebuf)); - if (nread <=0) { - if (p > sbf->linebuf) - break; - return NULL; - } - - p += nread; - if (p[-1] == '\n') - break; - - nread = p - sbf->linebuf; - sbf->linesize *= 2; - sbf->linebuf = g_realloc (sbf->linebuf, sbf->linesize); - p = sbf->linebuf + nread; - } - - p--; - if (p > sbf->linebuf && p[-1] == '\r') - p--; - p[0] = 0; - - return g_strdup(sbf->linebuf); -} - - - - - - |