169 lines
5.0 KiB
C
169 lines
5.0 KiB
C
/*-
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* Copyright (c) 1993, 1994
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* The Regents of the University of California. All rights reserved.
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* Copyright (c) 1993, 1994, 1995, 1996
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* Keith Bostic. All rights reserved.
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*
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* See the LICENSE file for redistribution information.
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*
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* @(#)mem.h 10.7 (Berkeley) 3/30/96
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*/
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/* Increase the size of a malloc'd buffer. Two versions, one that
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* returns, one that jumps to an error label.
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*/
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#define BINC_GOTO(sp, lp, llen, nlen) { \
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void *L__bincp; \
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if ((nlen) > llen) { \
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if ((L__bincp = binc(sp, lp, &(llen), nlen)) == NULL) \
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goto alloc_err; \
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/* \
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* !!! \
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* Possible pointer conversion. \
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*/ \
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lp = L__bincp; \
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} \
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}
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#define BINC_RET(sp, lp, llen, nlen) { \
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void *L__bincp; \
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if ((nlen) > llen) { \
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if ((L__bincp = binc(sp, lp, &(llen), nlen)) == NULL) \
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return (1); \
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/* \
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* !!! \
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* Possible pointer conversion. \
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*/ \
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lp = L__bincp; \
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} \
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}
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/*
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* Get some temporary space, preferably from the global temporary buffer,
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* from a malloc'd buffer otherwise. Two versions, one that returns, one
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* that jumps to an error label.
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*/
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#define GET_SPACE_GOTO(sp, bp, blen, nlen) { \
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GS *L__gp = (sp) == NULL ? NULL : (sp)->gp; \
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if (L__gp == NULL || F_ISSET(L__gp, G_TMP_INUSE)) { \
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bp = NULL; \
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blen = 0; \
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BINC_GOTO(sp, bp, blen, nlen); \
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} else { \
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BINC_GOTO(sp, L__gp->tmp_bp, L__gp->tmp_blen, nlen); \
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bp = L__gp->tmp_bp; \
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blen = L__gp->tmp_blen; \
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F_SET(L__gp, G_TMP_INUSE); \
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} \
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}
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#define GET_SPACE_RET(sp, bp, blen, nlen) { \
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GS *L__gp = (sp) == NULL ? NULL : (sp)->gp; \
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if (L__gp == NULL || F_ISSET(L__gp, G_TMP_INUSE)) { \
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bp = NULL; \
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blen = 0; \
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BINC_RET(sp, bp, blen, nlen); \
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} else { \
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BINC_RET(sp, L__gp->tmp_bp, L__gp->tmp_blen, nlen); \
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bp = L__gp->tmp_bp; \
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blen = L__gp->tmp_blen; \
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F_SET(L__gp, G_TMP_INUSE); \
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} \
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}
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/*
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* Add space to a GET_SPACE returned buffer. Two versions, one that
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* returns, one that jumps to an error label.
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*/
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#define ADD_SPACE_GOTO(sp, bp, blen, nlen) { \
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GS *L__gp = (sp) == NULL ? NULL : (sp)->gp; \
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if (L__gp == NULL || bp == L__gp->tmp_bp) { \
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F_CLR(L__gp, G_TMP_INUSE); \
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BINC_GOTO(sp, L__gp->tmp_bp, L__gp->tmp_blen, nlen); \
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bp = L__gp->tmp_bp; \
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blen = L__gp->tmp_blen; \
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F_SET(L__gp, G_TMP_INUSE); \
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} else \
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BINC_GOTO(sp, bp, blen, nlen); \
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}
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#define ADD_SPACE_RET(sp, bp, blen, nlen) { \
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GS *L__gp = (sp) == NULL ? NULL : (sp)->gp; \
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if (L__gp == NULL || bp == L__gp->tmp_bp) { \
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F_CLR(L__gp, G_TMP_INUSE); \
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BINC_RET(sp, L__gp->tmp_bp, L__gp->tmp_blen, nlen); \
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bp = L__gp->tmp_bp; \
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blen = L__gp->tmp_blen; \
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F_SET(L__gp, G_TMP_INUSE); \
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} else \
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BINC_RET(sp, bp, blen, nlen); \
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}
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/* Free a GET_SPACE returned buffer. */
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#define FREE_SPACE(sp, bp, blen) { \
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GS *L__gp = (sp) == NULL ? NULL : (sp)->gp; \
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if (L__gp != NULL && (CHAR_T *)bp == (CHAR_T *)L__gp->tmp_bp) \
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F_CLR(L__gp, G_TMP_INUSE); \
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else \
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free(bp); \
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}
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/*
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* Malloc a buffer, casting the return pointer. Various versions.
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*
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* !!!
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* The cast should be unnecessary, malloc(3) and friends return void *'s,
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* which is all we need. However, some systems that nvi needs to run on
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* don't do it right yet, resulting in the compiler printing out roughly
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* a million warnings. After awhile, it seemed easier to put the casts
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* in instead of explaining it all the time.
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*/
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#define CALLOC(sp, p, cast, nmemb, size) { \
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if ((p = (cast)calloc(nmemb, size)) == NULL) \
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msgq(sp, M_SYSERR, NULL); \
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}
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#define CALLOC_GOTO(sp, p, cast, nmemb, size) { \
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if ((p = (cast)calloc(nmemb, size)) == NULL) \
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goto alloc_err; \
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}
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#define CALLOC_NOMSG(sp, p, cast, nmemb, size) { \
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p = (cast)calloc(nmemb, size); \
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}
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#define CALLOC_RET(sp, p, cast, nmemb, size) { \
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if ((p = (cast)calloc(nmemb, size)) == NULL) { \
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msgq(sp, M_SYSERR, NULL); \
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return (1); \
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} \
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}
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#define MALLOC(sp, p, cast, size) { \
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if ((p = (cast)malloc(size)) == NULL) \
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msgq(sp, M_SYSERR, NULL); \
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}
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#define MALLOC_GOTO(sp, p, cast, size) { \
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if ((p = (cast)malloc(size)) == NULL) \
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goto alloc_err; \
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}
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#define MALLOC_NOMSG(sp, p, cast, size) { \
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p = (cast)malloc(size); \
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}
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#define MALLOC_RET(sp, p, cast, size) { \
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if ((p = (cast)malloc(size)) == NULL) { \
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msgq(sp, M_SYSERR, NULL); \
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return (1); \
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} \
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}
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/*
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* XXX
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* Don't depend on realloc(NULL, size) working.
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*/
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#define REALLOC(sp, p, cast, size) { \
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if ((p = (cast)(p == NULL ? \
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malloc(size) : realloc(p, size))) == NULL) \
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msgq(sp, M_SYSERR, NULL); \
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}
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/*
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* Versions of memmove(3) and memset(3) that use the size of the
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* initial pointer to figure out how much memory to manipulate.
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*/
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#define MEMMOVE(p, t, len) memmove(p, t, (len) * sizeof(*(p)))
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#define MEMSET(p, value, len) memset(p, value, (len) * sizeof(*(p)))
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