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Diffstat (limited to 'usr.bin/vi/common/mem.h')
| -rw-r--r-- | usr.bin/vi/common/mem.h | 178 |
1 files changed, 178 insertions, 0 deletions
diff --git a/usr.bin/vi/common/mem.h b/usr.bin/vi/common/mem.h new file mode 100644 index 000000000000..e61f7ffb6430 --- /dev/null +++ b/usr.bin/vi/common/mem.h @@ -0,0 +1,178 @@ +/*- + * 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 8.6 (Berkeley) 6/20/94 + */ + +/* 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) { \ + if ((nlen) > llen && binc(sp, &(lp), &(llen), nlen)) \ + goto binc_err; \ +} +#define BINC_RET(sp, lp, llen, nlen) { \ + if ((nlen) > llen && binc(sp, &(lp), &(llen), nlen)) \ + return (1); \ +} + +/* + * 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))) + +int binc __P((SCR *, void *, size_t *, size_t)); |