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/*-
* Copyright (c) 1993, 1994
* The Regents of the University of California. 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.
* 3. All advertising materials mentioning features or use of this software
* must display the following acknowledgement:
* This product includes software developed by the University of
* California, Berkeley and its contributors.
* 4. 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.
*
* @(#)mem.h 8.8 (Berkeley) 8/16/94
*/
/* Increase the size of a malloc'd buffer. Two versions, one that
* returns, one that jumps to an error label.
*/
#define BINC_GOTO(sp, lp, llen, nlen) { \
void *__bincp; \
if ((nlen) > llen) { \
if ((__bincp = binc(sp, lp, &(llen), nlen)) == NULL) \
goto binc_err; \
/* \
* !!! \
* Possible pointer conversion. \
*/ \
lp = __bincp; \
} \
}
#define BINC_RET(sp, lp, llen, nlen) { \
void *__bincp; \
if ((nlen) > llen) { \
if ((__bincp = binc(sp, lp, &(llen), nlen)) == NULL) \
return (1); \
/* \
* !!! \
* Possible pointer conversion. \
*/ \
lp = __bincp; \
} \
}
/*
* Get some temporary space, preferably from the global temporary buffer,
* from a malloc'd buffer otherwise. Two versions, one that returns, one
* that jumps to an error label.
*/
#define GET_SPACE_GOTO(sp, bp, blen, nlen) { \
GS *__gp = (sp)->gp; \
if (F_ISSET(__gp, G_TMP_INUSE)) { \
bp = NULL; \
blen = 0; \
BINC_GOTO(sp, bp, blen, nlen); \
} else { \
BINC_GOTO(sp, __gp->tmp_bp, __gp->tmp_blen, nlen); \
bp = __gp->tmp_bp; \
blen = __gp->tmp_blen; \
F_SET(__gp, G_TMP_INUSE); \
} \
}
#define GET_SPACE_RET(sp, bp, blen, nlen) { \
GS *__gp = (sp)->gp; \
if (F_ISSET(__gp, G_TMP_INUSE)) { \
bp = NULL; \
blen = 0; \
BINC_RET(sp, bp, blen, nlen); \
} else { \
BINC_RET(sp, __gp->tmp_bp, __gp->tmp_blen, nlen); \
bp = __gp->tmp_bp; \
blen = __gp->tmp_blen; \
F_SET(__gp, G_TMP_INUSE); \
} \
}
/*
* Add space to a GET_SPACE returned buffer. Two versions, one that
* returns, one that jumps to an error label.
*/
#define ADD_SPACE_GOTO(sp, bp, blen, nlen) { \
GS *__gp = (sp)->gp; \
if (bp == __gp->tmp_bp) { \
F_CLR(__gp, G_TMP_INUSE); \
BINC_GOTO(sp, __gp->tmp_bp, __gp->tmp_blen, nlen); \
bp = __gp->tmp_bp; \
blen = __gp->tmp_blen; \
F_SET(__gp, G_TMP_INUSE); \
} else \
BINC_GOTO(sp, bp, blen, nlen); \
}
#define ADD_SPACE_RET(sp, bp, blen, nlen) { \
GS *__gp = (sp)->gp; \
if (bp == __gp->tmp_bp) { \
F_CLR(__gp, G_TMP_INUSE); \
BINC_RET(sp, __gp->tmp_bp, __gp->tmp_blen, nlen); \
bp = __gp->tmp_bp; \
blen = __gp->tmp_blen; \
F_SET(__gp, G_TMP_INUSE); \
} else \
BINC_RET(sp, bp, blen, nlen); \
}
/* Free memory, optionally making pointers unusable. */
#ifdef DEBUG
#define FREE(p, sz) { \
memset(p, 0xff, sz); \
free(p); \
}
#else
#define FREE(p, sz) free(p);
#endif
/* Free a GET_SPACE returned buffer. */
#define FREE_SPACE(sp, bp, blen) { \
if (bp == sp->gp->tmp_bp) \
F_CLR(sp->gp, G_TMP_INUSE); \
else \
FREE(bp, blen); \
}
/*
* Malloc a buffer, casting the return pointer. Various versions.
*
* !!!
* The cast should be unnecessary, malloc(3) and friends return void *'s,
* which is all we need. However, some systems that nvi needs to run on
* don't do it right yet, resulting in the compiler printing out roughly
* a million warnings. After awhile, it seemed easier to put the casts
* in instead of explaining it all the time.
*/
#define CALLOC_NOMSG(sp, p, cast, nmemb, size) { \
p = (cast)calloc(nmemb, size); \
}
#define CALLOC(sp, p, cast, nmemb, size) { \
if ((p = (cast)calloc(nmemb, size)) == NULL) \
msgq(sp, M_SYSERR, NULL); \
}
#define CALLOC_RET(sp, p, cast, nmemb, size) { \
if ((p = (cast)calloc(nmemb, size)) == NULL) { \
msgq(sp, M_SYSERR, NULL); \
return (1); \
} \
}
#define MALLOC_NOMSG(sp, p, cast, size) { \
p = (cast)malloc(size); \
}
#define MALLOC(sp, p, cast, size) { \
if ((p = (cast)malloc(size)) == NULL) \
msgq(sp, M_SYSERR, NULL); \
}
#define MALLOC_RET(sp, p, cast, size) { \
if ((p = (cast)malloc(size)) == NULL) { \
msgq(sp, M_SYSERR, NULL); \
return (1); \
} \
}
/*
* XXX
* Don't depend on realloc(NULL, size) working.
*/
#define REALLOC(sp, p, cast, size) { \
if ((p = (cast)(p == NULL ? \
malloc(size) : realloc(p, size))) == NULL) \
msgq(sp, M_SYSERR, NULL); \
}
/*
* Versions of memmove(3) and memset(3) that use the size of the
* initial pointer to figure out how much memory to manipulate.
*/
#define MEMMOVE(p, t, len) memmove(p, t, (len) * sizeof(*(p)))
#define MEMSET(p, value, len) memset(p, value, (len) * sizeof(*(p)))
void *binc __P((SCR *, void *, size_t *, size_t));
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