Mon, 03 Nov 2014 15:43:04 +0100
added property-set and property-get command
/* * 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; switch (whence) { case SEEK_CUR: npos = buffer->pos; break; case SEEK_END: npos = buffer->size; break; default: npos = 0; } 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_puts(UcxBuffer *buffer, char *str) { return ucx_buffer_write((const void*)str, 1, strlen(str), buffer); }