82 lines
2.0 KiB
C
82 lines
2.0 KiB
C
/*
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* $Id: printbuf.h,v 1.4 2006/01/26 02:16:28 mclark Exp $
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*
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* Copyright (c) 2004, 2005 Metaparadigm Pte. Ltd.
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* Michael Clark <michael@metaparadigm.com>
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*
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* This library is free software; you can redistribute it and/or modify
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* it under the terms of the MIT license. See COPYING for details.
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*
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*
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* Copyright (c) 2008-2009 Yahoo! Inc. All rights reserved.
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* The copyrights to the contents of this file are licensed under the MIT License
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* (http://www.opensource.org/licenses/mit-license.php)
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*/
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#ifndef _printbuf_h_
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#define _printbuf_h_
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#ifdef __cplusplus
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extern "C" {
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#endif
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struct printbuf {
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char *buf;
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size_t bpos;
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size_t size;
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};
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extern struct printbuf*
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printbuf_new(void);
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/* As an optimization, printbuf_memappend_fast is defined as a macro
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* that handles copying data if the buffer is large enough; otherwise
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* it invokes printbuf_memappend_real() which performs the heavy
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* lifting of realloc()ing the buffer and copying data.
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* Your code should not use printbuf_memappend directly--use
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* printbuf_memappend_fast instead.
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*/
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extern size_t printbuf_memappend(struct printbuf *p, const char *buf, size_t size);
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__inline void printbuf_memappend_fast(struct printbuf *p, const char *bufptr, size_t bufsize)
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{
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if ((p->size - p->bpos) > bufsize)
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{
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memcpy(p->buf + p->bpos, (bufptr), bufsize);
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p->bpos += (int)bufsize;
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p->buf[p->bpos] = '\0';
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}
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else
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{
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printbuf_memappend(p, (bufptr), bufsize);
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}
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}
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#define printbuf_length(p) ((p)->bpos)
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/**
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* Set len bytes of the buffer to charvalue, starting at offset offset.
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* Similar to calling memset(x, charvalue, len);
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*
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* The memory allocated for the buffer is extended as necessary.
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*
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* If offset is -1, this starts at the end of the current data in the buffer.
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*/
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extern int
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printbuf_memset(struct printbuf *pb, size_t offset, int charvalue, size_t len);
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extern int
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sprintbuf(struct printbuf *p, const char *msg, ...);
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extern void
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printbuf_reset(struct printbuf *p);
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extern void
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printbuf_free(struct printbuf *p);
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#ifdef __cplusplus
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}
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#endif
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#endif
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