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/* $OpenBSD: mem.h,v 1.4 2001/01/29 01:58:30 niklas Exp $ */
/*-
* Copyright (c) 1993, 1994
* The Regents of the University of California. All rights reserved.
* Copyright (c) 1993, 1994, 1995, 1996
* Keith Bostic. All rights reserved.
*
* See the LICENSE file for redistribution information.
*
* @(#)mem.h 10.7 (Berkeley) 3/30/96
*/
/* 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 *L__bincp; \
if ((nlen) > llen) { \
if ((L__bincp = binc(sp, lp, &(llen), nlen)) == NULL) \
goto alloc_err; \
/* \
* !!! \
* Possible pointer conversion. \
*/ \
lp = L__bincp; \
} \
}
#define BINC_RET(sp, lp, llen, nlen) { \
void *L__bincp; \
if ((nlen) > llen) { \
if ((L__bincp = binc(sp, lp, &(llen), nlen)) == NULL) \
return (1); \
/* \
* !!! \
* Possible pointer conversion. \
*/ \
lp = L__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 *L__gp = (sp) == NULL ? NULL : (sp)->gp; \
if (L__gp == NULL || F_ISSET(L__gp, G_TMP_INUSE)) { \
bp = NULL; \
blen = 0; \
BINC_GOTO(sp, bp, blen, nlen); \
} else { \
BINC_GOTO(sp, L__gp->tmp_bp, L__gp->tmp_blen, nlen); \
bp = L__gp->tmp_bp; \
blen = L__gp->tmp_blen; \
F_SET(L__gp, G_TMP_INUSE); \
} \
}
#define GET_SPACE_RET(sp, bp, blen, nlen) { \
GS *L__gp = (sp) == NULL ? NULL : (sp)->gp; \
if (L__gp == NULL || F_ISSET(L__gp, G_TMP_INUSE)) { \
bp = NULL; \
blen = 0; \
BINC_RET(sp, bp, blen, nlen); \
} else { \
BINC_RET(sp, L__gp->tmp_bp, L__gp->tmp_blen, nlen); \
bp = L__gp->tmp_bp; \
blen = L__gp->tmp_blen; \
F_SET(L__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 *L__gp = (sp) == NULL ? NULL : (sp)->gp; \
if (L__gp == NULL || bp == L__gp->tmp_bp) { \
F_CLR(L__gp, G_TMP_INUSE); \
BINC_GOTO(sp, L__gp->tmp_bp, L__gp->tmp_blen, nlen); \
bp = L__gp->tmp_bp; \
blen = L__gp->tmp_blen; \
F_SET(L__gp, G_TMP_INUSE); \
} else \
BINC_GOTO(sp, bp, blen, nlen); \
}
#define ADD_SPACE_RET(sp, bp, blen, nlen) { \
GS *L__gp = (sp) == NULL ? NULL : (sp)->gp; \
if (L__gp == NULL || bp == L__gp->tmp_bp) { \
F_CLR(L__gp, G_TMP_INUSE); \
BINC_RET(sp, L__gp->tmp_bp, L__gp->tmp_blen, nlen); \
bp = L__gp->tmp_bp; \
blen = L__gp->tmp_blen; \
F_SET(L__gp, G_TMP_INUSE); \
} else \
BINC_RET(sp, bp, blen, nlen); \
}
/* Free a GET_SPACE returned buffer. */
#define FREE_SPACE(sp, bp, blen) { \
GS *L__gp = (sp) == NULL ? NULL : (sp)->gp; \
if (L__gp != NULL && bp == L__gp->tmp_bp) \
F_CLR(L__gp, G_TMP_INUSE); \
else \
free(bp); \
}
/*
* 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(sp, p, cast, nmemb, size) { \
if ((p = (cast)calloc(nmemb, size)) == NULL) \
msgq(sp, M_SYSERR, NULL); \
}
#define CALLOC_GOTO(sp, p, cast, nmemb, size) { \
if ((p = (cast)calloc(nmemb, size)) == NULL) \
goto alloc_err; \
}
#define CALLOC_NOMSG(sp, p, cast, nmemb, size) { \
p = (cast)calloc(nmemb, size); \
}
#define CALLOC_RET(sp, p, cast, nmemb, size) { \
if ((p = (cast)calloc(nmemb, size)) == NULL) { \
msgq(sp, M_SYSERR, NULL); \
return (1); \
} \
}
#define MALLOC(sp, p, cast, size) { \
if ((p = (cast)malloc(size)) == NULL) \
msgq(sp, M_SYSERR, NULL); \
}
#define MALLOC_GOTO(sp, p, cast, size) { \
if ((p = (cast)malloc(size)) == NULL) \
goto alloc_err; \
}
#define MALLOC_NOMSG(sp, p, cast, size) { \
p = (cast)malloc(size); \
}
#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)))
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