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GCC Code Coverage Report

Directory:	./		Exec	Total	Coverage
File:	usr.bin/make/buf.c	Lines:	22	28	78.6 %
Date:	2016-12-06	Branches:	11	18	61.1 %


/*	$OpenBSD: buf.c,v 1.27 2015/04/29 00:42:12 millert Exp $	*/
/*	$NetBSD: buf.c,v 1.9 1996/12/31 17:53:21 christos Exp $ */

/*
 * Copyright (c) 1999 Marc Espie.
 *
 * Extensive code changes for the OpenBSD project.
 *
 * 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 OPENBSD PROJECT 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 OPENBSD
 * PROJECT 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.
 */
/*
 * Copyright (c) 1988, 1989, 1990 The Regents of the University of California.
 * Copyright (c) 1988, 1989 by Adam de Boor
 * Copyright (c) 1989 by Berkeley Softworks
 * All rights reserved.
 *
 * This code is derived from software contributed to Berkeley by
 * Adam de Boor.
 *
 * 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.
 * 3. Neither the name of the University nor the names of its contributors
 *    may be used to endorse or promote products derived from this software
 *    without specific prior written permission.
 *
 * THIS SOFTWARE IS PROVIDED BY THE REGENTS 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 REGENTS 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.
 */

/*-
 * buf.c --
 *	Functions for automatically expanded buffers.
 */

#include <ctype.h>
#include <limits.h>
#include <stddef.h>
#include <stdint.h>
#include <stdlib.h>
#include <string.h>
#include <stdio.h>
#include <stdarg.h>
#include "config.h"
#include "defines.h"
#include "buf.h"
#include "stats.h"
#include "memory.h"

#ifdef STATS_BUF
#define DO_STAT_BUF(bp, nb)					\
	STAT_BUFS_EXPANSION++;			\
	if ((bp)->endPtr - (bp)->buffer == 1)			\
		STAT_WEIRD_INEFFICIENT++;
#else
#define DO_STAT_BUF(a, b)
#endif

static void
fatal_overflow()
{
	fprintf(stderr, "buffer size overflow\n");
	exit(2);
}

/* BufExpand(bp, nb)
 *	Expand buffer bp to hold upto nb additional
 *	chars.	Makes sure there's room for an extra '\0' char at
 *	the end of the buffer to terminate the string.	*/
#define BufExpand(bp,nb)				\
do {							\
	size_t   occupied = (bp)->inPtr - (bp)->buffer;	\
	size_t   size = (bp)->endPtr - (bp)->buffer;	\
	DO_STAT_BUF(bp, nb);				\
							\
	do {						\
		if (size <= SIZE_MAX/2) {		\
			size *= 2 ;			\
		} else {				\
			fatal_overflow();		\
		}					\
	} while (size - occupied < (nb)+1+BUF_MARGIN);	\
	(bp)->buffer = (bp)->inPtr = (bp)->endPtr = 	\
		erealloc((bp)->buffer, size);		\
	(bp)->inPtr += occupied;			\
	(bp)->endPtr += size;				\
} while (0);

#define BUF_DEF_SIZE	256	/* Default buffer size */
#define BUF_MARGIN	256	/* Make sure we are comfortable */

/* the hard case for Buf_AddChar: buffer must be expanded to accommodate
 * one more char.  */
void
BufOverflow(Buffer bp)
{
	BufExpand(bp, 1);
}


void
Buf_AddChars(Buffer bp, size_t numBytes, const char *bytesPtr)
{

	if ((size_t)(bp->endPtr - bp->inPtr) < numBytes+1)
		BufExpand(bp, numBytes);

	memcpy(bp->inPtr, bytesPtr, numBytes);
	bp->inPtr += numBytes;
}

void
Buf_printf(Buffer bp, const char *fmt, ...)
{
	va_list va;
	int n;
	va_start(va, fmt);
	n = vsnprintf(bp->inPtr, bp->endPtr - bp->inPtr, fmt, va);
	va_end(va);
	if (n > bp->endPtr - bp->inPtr) {
		va_list vb;
		BufExpand(bp, n);
		va_start(vb, fmt);
		(void)vsnprintf(bp->inPtr, bp->endPtr - bp->inPtr, fmt, vb);
		va_end(vb);
	}
	bp->inPtr += n;
}

void
Buf_Init(Buffer bp, size_t size)
{
#ifdef STATS_BUF
	STAT_TOTAL_BUFS++;
	if (size == 0)
		STAT_DEFAULT_BUFS++;
	if (size == 1)
		STAT_WEIRD_BUFS++;
#endif
	if (size == 0)
		size = BUF_DEF_SIZE;
	bp->inPtr = bp->endPtr = bp->buffer = emalloc(size);
	bp->endPtr += size;
}


Generated by: GCOVR (Version 3.3)

Line	Branch	Exec	Source
1			/* $OpenBSD: buf.c,v 1.27 2015/04/29 00:42:12 millert Exp $ */
2			/* $NetBSD: buf.c,v 1.9 1996/12/31 17:53:21 christos Exp $ */
3
4			/*
5			* Copyright (c) 1999 Marc Espie.
6			*
7			* Extensive code changes for the OpenBSD project.
8			*
9			* Redistribution and use in source and binary forms, with or without
10			* modification, are permitted provided that the following conditions
11			* are met:
12			* 1. Redistributions of source code must retain the above copyright
13			* notice, this list of conditions and the following disclaimer.
14			* 2. Redistributions in binary form must reproduce the above copyright
15			* notice, this list of conditions and the following disclaimer in the
16			* documentation and/or other materials provided with the distribution.
17			*
18			* THIS SOFTWARE IS PROVIDED BY THE OPENBSD PROJECT AND CONTRIBUTORS
19			* ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
20			* LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
21			* A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE OPENBSD
22			* PROJECT OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
23			* SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
24			* LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
25			* DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
26			* THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
27			* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
28			* OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
29			*/
30			/*
31			* Copyright (c) 1988, 1989, 1990 The Regents of the University of California.
32			* Copyright (c) 1988, 1989 by Adam de Boor
33			* Copyright (c) 1989 by Berkeley Softworks
34			* All rights reserved.
35			*
36			* This code is derived from software contributed to Berkeley by
37			* Adam de Boor.
38			*
39			* Redistribution and use in source and binary forms, with or without
40			* modification, are permitted provided that the following conditions
41			* are met:
42			* 1. Redistributions of source code must retain the above copyright
43			* notice, this list of conditions and the following disclaimer.
44			* 2. Redistributions in binary form must reproduce the above copyright
45			* notice, this list of conditions and the following disclaimer in the
46			* documentation and/or other materials provided with the distribution.
47			* 3. Neither the name of the University nor the names of its contributors
48			* may be used to endorse or promote products derived from this software
49			* without specific prior written permission.
50			*
51			* THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
52			* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
53			* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
54			* ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
55			* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
56			* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
57			* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
58			* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
59			* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
60			* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
61			* SUCH DAMAGE.
62			*/
63
64			/*-
65			* buf.c --
66			* Functions for automatically expanded buffers.
67			*/
68
69			#include <ctype.h>
70			#include <limits.h>
71			#include <stddef.h>
72			#include <stdint.h>
73			#include <stdlib.h>
74			#include <string.h>
75			#include <stdio.h>
76			#include <stdarg.h>
77			#include "config.h"
78			#include "defines.h"
79			#include "buf.h"
80			#include "stats.h"
81			#include "memory.h"
82
83			#ifdef STATS_BUF
84			#define DO_STAT_BUF(bp, nb) \
85			STAT_BUFS_EXPANSION++; \
86			if ((bp)->endPtr - (bp)->buffer == 1) \
87			STAT_WEIRD_INEFFICIENT++;
88			#else
89			#define DO_STAT_BUF(a, b)
90			#endif
91
92			static void
93			fatal_overflow()
94			{
95			fprintf(stderr, "buffer size overflow\n");
96			exit(2);
97			}
98
99			/* BufExpand(bp, nb)
100			* Expand buffer bp to hold upto nb additional
101			* chars. Makes sure there's room for an extra '\0' char at
102			* the end of the buffer to terminate the string. */
103			#define BufExpand(bp,nb) \
104			do { \
105			size_t occupied = (bp)->inPtr - (bp)->buffer; \
106			size_t size = (bp)->endPtr - (bp)->buffer; \
107			DO_STAT_BUF(bp, nb); \
108			\
109			do { \
110			if (size <= SIZE_MAX/2) { \
111			size *= 2 ; \
112			} else { \
113			fatal_overflow(); \
114			} \
115			} while (size - occupied < (nb)+1+BUF_MARGIN); \
116			(bp)->buffer = (bp)->inPtr = (bp)->endPtr = \
117			erealloc((bp)->buffer, size); \
118			(bp)->inPtr += occupied; \
119			(bp)->endPtr += size; \
120			} while (0);
121
122			#define BUF_DEF_SIZE 256 /* Default buffer size */
123			#define BUF_MARGIN 256 /* Make sure we are comfortable */
124
125			/* the hard case for Buf_AddChar: buffer must be expanded to accommodate
126			* one more char. */
127			void
128			BufOverflow(Buffer bp)
129		5224	{
130	✓✗✓✓	5224	BufExpand(bp, 1);
131		5224	}
132
133
134			void
135			Buf_AddChars(Buffer bp, size_t numBytes, const char *bytesPtr)
136		674198	{
137
138	✓✓	674198	if ((size_t)(bp->endPtr - bp->inPtr) < numBytes+1)
139	✓✗✓✓	5238	BufExpand(bp, numBytes);
140
141		674198	memcpy(bp->inPtr, bytesPtr, numBytes);
142		674198	bp->inPtr += numBytes;
143		674198	}
144
145			void
146			Buf_printf(Buffer bp, const char *fmt, ...)
147		126	{
148			va_list va;
149			int n;
150		126	va_start(va, fmt);
151		126	n = vsnprintf(bp->inPtr, bp->endPtr - bp->inPtr, fmt, va);
152		126	va_end(va);
153	✗✓	126	if (n > bp->endPtr - bp->inPtr) {
154			va_list vb;
155			BufExpand(bp, n);
156			va_start(vb, fmt);
157			(void)vsnprintf(bp->inPtr, bp->endPtr - bp->inPtr, fmt, vb);
158			va_end(vb);
159			}
160		126	bp->inPtr += n;
161		126	}
162
163			void
164			Buf_Init(Buffer bp, size_t size)
165		286026	{
166			#ifdef STATS_BUF
167			STAT_TOTAL_BUFS++;
168			if (size == 0)
169			STAT_DEFAULT_BUFS++;
170			if (size == 1)
171			STAT_WEIRD_BUFS++;
172			#endif
173	✓✓	286026	if (size == 0)
174		60712	size = BUF_DEF_SIZE;
175		286026	bp->inPtr = bp->endPtr = bp->buffer = emalloc(size);
176		286026	bp->endPtr += size;
177		286026	}