2 * $Id: printbuf.c,v 1.5 2006/01/26 02:16:28 mclark Exp $
4 * Copyright (c) 2004, 2005 Metaparadigm Pte. Ltd.
5 * Michael Clark <michael@metaparadigm.com>
7 * This library is free software; you can redistribute it and/or modify
8 * it under the terms of the MIT license. See COPYING for details.
20 #else /* !HAVE_STDARG_H */
21 # error Not enough var arg support!
22 #endif /* HAVE_STDARG_H */
28 struct printbuf* printbuf_new()
32 if(!(p = calloc(1, sizeof(struct printbuf)))) return NULL;
35 if(!(p->buf = malloc(p->size))) {
43 int printbuf_memappend(struct printbuf *p, char *buf, int size)
46 if(p->size - p->bpos <= size) {
47 int new_size = max(p->size * 2, p->bpos + size + 8);
49 mc_debug("printbuf_memappend: realloc "
50 "bpos=%d wrsize=%d old_size=%d new_size=%d\n",
51 p->bpos, size, p->size, new_size);
52 #endif /* PRINTBUF_DEBUG */
53 if(!(t = realloc(p->buf, new_size))) return -1;
57 memcpy(p->buf + p->bpos, buf, size);
59 p->buf[p->bpos]= '\0';
63 #if !HAVE_VSNPRINTF && defined(WIN32)
64 # define vsnprintf _vsnprintf
65 #elif !HAVE_VSNPRINTF /* !HAVE_VSNPRINTF */
66 # error Need vsnprintf!
67 #endif /* !HAVE_VSNPRINTF && defined(WIN32) */
70 /* CAW: compliant version of vasprintf */
71 static int vasprintf(char **buf, const char *fmt, va_list ap)
74 static char _T_emptybuffer = '\0';
75 #endif /* !defined(WIN32) */
79 if(!buf) { return -1; }
82 chars = _vscprintf(fmt, ap)+1;
83 #else /* !defined(WIN32) */
84 /* CAW: RAWR! We have to hope to god here that vsnprintf doesn't overwrite
85 our buffer like on some 64bit sun systems.... but hey, its time to move on */
86 chars = vsnprintf(&_T_emptybuffer, 0, fmt, ap)+1;
87 if(chars < 0) { chars *= -1; } /* CAW: old glibc versions have this problem */
88 #endif /* defined(WIN32) */
90 b = (char*)malloc(sizeof(char)*chars);
93 if((chars = vsprintf(b, fmt, ap)) < 0)
102 #endif /* !HAVE_VASPRINTF */
104 int sprintbuf(struct printbuf *p, const char *msg, ...)
111 /* user stack buffer first */
113 size = vsnprintf(buf, 128, msg, ap);
115 /* if string is greater than stack buffer, then use dynamic string
116 with vasprintf. Note: some implementation of vsnprintf return -1
117 if output is truncated whereas some return the number of bytes that
118 would have been writen - this code handles both cases. */
119 if(size == -1 || size > 127) {
122 if((size = vasprintf(&t, msg, ap)) == -1) return -1;
124 ret = printbuf_memappend(p, t, size);
128 return printbuf_memappend(p, buf, size);
132 void printbuf_reset(struct printbuf *p)
138 void printbuf_free(struct printbuf *p)