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77 lines
2.1 KiB
77 lines
2.1 KiB
/* |
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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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int bpos; |
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int 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 int |
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printbuf_memappend(struct printbuf *p, const char *buf, int size); |
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#define printbuf_memappend_fast(p, bufptr, bufsize) \ |
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do { \ |
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if ((p->size - p->bpos) > bufsize) { \ |
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memcpy(p->buf + p->bpos, (bufptr), bufsize); \ |
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p->bpos += bufsize; \ |
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p->buf[p->bpos]= '\0'; \ |
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} else { printbuf_memappend(p, (bufptr), bufsize); } \ |
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} while (0) |
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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, int offset, int charvalue, int 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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