--- /dev/null Thu Jan 01 00:00:00 1970 +0000
+++ b/src/server/ucx/buffer.c Fri Jun 21 12:10:44 2013 +0200
@@ -0,0 +1,260 @@
+/*
+ * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS HEADER.
+ *
+ * Copyright 2013 Olaf Wintermann. All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions are met:
+ *
+ * 1. Redistributions of source code must retain the above copyright
+ * notice, this list of conditions and the following disclaimer.
+ *
+ * 2. Redistributions in binary form must reproduce the above copyright
+ * notice, this list of conditions and the following disclaimer in the
+ * documentation and/or other materials provided with the distribution.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
+ * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
+ * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
+ * ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE
+ * LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
+ * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
+ * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
+ * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
+ * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
+ * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
+ * POSSIBILITY OF SUCH DAMAGE.
+ */
+
+#include "buffer.h"
+#include <stdarg.h>
+#include <stdlib.h>
+#include <string.h>
+
+UcxBuffer *ucx_buffer_new(void *space, size_t size, int flags) {
+ UcxBuffer *buffer = (UcxBuffer*) malloc(sizeof(UcxBuffer));
+ if (buffer) {
+ buffer->flags = flags;
+ if (!space) {
+ buffer->space = (char*)malloc(size);
+ if (!buffer->space) {
+ free(buffer);
+ return NULL;
+ }
+ memset(buffer->space, 0, size);
+ buffer->flags |= UCX_BUFFER_AUTOFREE;
+ } else {
+ buffer->space = (char*)space;
+ }
+ buffer->capacity = size;
+ buffer->size = 0;
+
+ buffer->pos = 0;
+ }
+
+ return buffer;
+}
+
+void ucx_buffer_free(UcxBuffer *buffer) {
+ if ((buffer->flags & UCX_BUFFER_AUTOFREE) == UCX_BUFFER_AUTOFREE) {
+ free(buffer->space);
+ }
+ free(buffer);
+}
+
+UcxBuffer* ucx_buffer_extract(
+ UcxBuffer *src, size_t start, size_t length, int flags) {
+ if(src->size == 0) {
+ return NULL;
+ }
+ if (length == 0) {
+ length = src->size - start;
+ }
+ if (start+length > src->size) {
+ return NULL;
+ }
+
+ UcxBuffer *dst = (UcxBuffer*) malloc(sizeof(UcxBuffer));
+ if (dst) {
+ dst->space = (char*)malloc(length);
+ if (!dst->space) {
+ free(dst);
+ return NULL;
+ }
+ dst->capacity = length;
+ dst->size = length;
+ dst->flags = flags | UCX_BUFFER_AUTOFREE;
+ dst->pos = 0;
+ memcpy(dst->space, src->space+start, length);
+ }
+ return dst;
+}
+
+int ucx_buffer_seek(UcxBuffer *buffer, off_t offset, int whence) {
+ size_t npos = 0;
+ switch (whence) {
+ case SEEK_SET:
+ npos = 0;
+ break;
+ case SEEK_CUR:
+ npos = buffer->pos;
+ break;
+ case SEEK_END:
+ npos = buffer->size;
+ break;
+ }
+
+ npos += offset;
+
+ if (npos > buffer->size) {
+ return -1;
+ } else {
+ buffer->pos = npos;
+ return 0;
+ }
+
+}
+
+int ucx_buffer_eof(UcxBuffer *buffer) {
+ return buffer->pos >= buffer->size;
+}
+
+int ucx_buffer_extend(UcxBuffer *buffer, size_t len) {
+ size_t newcap = buffer->capacity;
+ while (buffer->pos + len > newcap) newcap <<= 1;
+
+ char *newspace = (char*)realloc(buffer->space, newcap);
+ if (newspace) {
+ memset(newspace+buffer->size, 0, newcap-buffer->size);
+ buffer->space = newspace;
+ buffer->capacity = newcap;
+ } else {
+ return -1;
+ }
+
+ return 0;
+}
+
+size_t ucx_buffer_write(const void *ptr, size_t size, size_t nitems,
+ UcxBuffer *buffer) {
+ size_t len = size * nitems;
+ if (buffer->pos + len > buffer->capacity) {
+ if ((buffer->flags & UCX_BUFFER_AUTOEXTEND) == UCX_BUFFER_AUTOEXTEND) {
+ if(ucx_buffer_extend(buffer, len)) {
+ return -1;
+ }
+ } else {
+ len = buffer->capacity - buffer->pos;
+ if (size > 1) len -= len%size;
+ }
+ }
+
+ if (len <= 0) {
+ return len;
+ }
+
+ memcpy(buffer->space + buffer->pos, ptr, len);
+ buffer->pos += len;
+ if(buffer->pos > buffer->size) {
+ buffer->size = buffer->pos;
+ }
+
+ return len / size;
+}
+
+size_t ucx_buffer_read(void *ptr, size_t size, size_t nitems,
+ UcxBuffer *buffer) {
+ size_t len = size * nitems;
+ if (buffer->pos + len > buffer->size) {
+ len = buffer->size - buffer->pos;
+ if (size > 1) len -= len%size;
+ }
+
+ if (len <= 0) {
+ return len;
+ }
+
+ memcpy(ptr, buffer->space + buffer->pos, len);
+ buffer->pos += len;
+
+ return len / size;
+}
+
+int ucx_buffer_putc(UcxBuffer *buffer, int c) {
+ if(buffer->pos >= buffer->capacity) {
+ if ((buffer->flags & UCX_BUFFER_AUTOEXTEND) == UCX_BUFFER_AUTOEXTEND) {
+ if(ucx_buffer_extend(buffer, 1)) {
+ return EOF;
+ }
+ } else {
+ return EOF;
+ }
+ }
+
+ c &= 0xFF;
+ buffer->space[buffer->pos] = (char) c;
+ buffer->pos++;
+ if(buffer->pos > buffer->size) {
+ buffer->size = buffer->pos;
+ }
+ return c;
+}
+
+int ucx_buffer_getc(UcxBuffer *buffer) {
+ if (ucx_buffer_eof(buffer)) {
+ return EOF;
+ } else {
+ int c = buffer->space[buffer->pos];
+ buffer->pos++;
+ return c;
+ }
+}
+
+size_t ucx_buffer_generic_copy(void *s1, void *s2,
+ read_func readfnc, write_func writefnc, size_t bufsize) {
+ size_t ncp = 0;
+ char *buf = (char*)malloc(bufsize);
+ if(buf == NULL) {
+ return 0;
+ }
+
+ size_t r;
+ while((r = readfnc(buf, 1, bufsize, s1)) != 0) {
+ r = writefnc(buf, 1, r, s2);
+ ncp += r;
+ if(r == 0) {
+ break;
+ }
+ }
+
+ free(buf);
+ return ncp;
+}
+
+size_t ucx_buffer_generic_ncopy(void *s1, void *s2,
+ read_func readfnc, write_func writefnc, size_t bufsize, size_t n) {
+ if(n == 0) {
+ return 0;
+ }
+
+ size_t ncp = 0;
+ char *buf = (char*)malloc(bufsize);
+ if(buf == NULL) {
+ return 0;
+ }
+
+ size_t r;
+ size_t rn = bufsize > n ? n : bufsize;
+ while((r = readfnc(buf, 1, rn, s1)) != 0) {
+ r = writefnc(buf, 1, r, s2);
+ ncp += r;
+ n -= r;
+ rn = bufsize > n ? n : bufsize;
+ if(r == 0 || n == 0) {
+ break;
+ }
+ }
+
+ free(buf);
+ return ncp;
+}