# 2.11BSD#431 - /usr/src/ucb/Mail/strings.c

##### Functions

    salloc            X
    spreserve         X
    sreset            X

       1: /*
       2:  * Copyright (c) 1980 Regents of the University of California.
       3:  * All rights reserved.
       4:  *
       5:  * Redistribution and use in source and binary forms, with or without
       6:  * modification, are permitted provided that the following conditions
       7:  * are met:
       8:  * 1. Redistributions of source code must retain the above copyright
       9:  *    notice, this list of conditions and the following disclaimer.
      10:  * 2. Redistributions in binary form must reproduce the above copyright
      11:  *    notice, this list of conditions and the following disclaimer in the
      12:  *    documentation and/or other materials provided with the distribution.
      13:  * 3. All advertising materials mentioning features or use of this software
      14:  *    must display the following acknowledgement:
      15:  *	This product includes software developed by the University of
      16:  *	California, Berkeley and its contributors.
      17:  * 4. Neither the name of the University nor the names of its contributors
      18:  *    may be used to endorse or promote products derived from this software
      19:  *    without specific prior written permission.
      20:  *
      21:  * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
      22:  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
      23:  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
      24:  * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
      25:  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
      26:  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
      27:  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
      28:  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
      29:  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
      30:  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
      31:  * SUCH DAMAGE.
      32:  */
      33:
      34: #if !defined(lint) && defined(DOSCCS)
      35: static char sccsid[] = "@(#)strings.c	5.9 (Berkeley) 6/1/90";
      36: #endif
      37:
      38: /*
      39:  * Mail -- a mail program
      40:  *
      41:  * String allocation routines.
      42:  * Strings handed out here are reclaimed at the top of the command
      43:  * loop each time, so they need not be freed.
      44:  */
      45:
      46: #include "rcv.h"
      47:
      48: /*
      49:  * Allocate size more bytes of space and return the address of the
      50:  * first byte to the caller.  An even number of bytes are always
      51:  * allocated so that the space will always be on a word boundary.
      52:  * The string spaces are of exponentially increasing size, to satisfy
      53:  * the occasional user with enormous string size requests.
      54:  */
      55:
      56: char *
      57: salloc(size)
      58: {
      59:     register char *t;
      60:     register int s;
      61:     register struct strings *sp;
      62:     int index;
      63:
      64:     s = size;
      65:     s += 3;
      66:     s &= ~03;
      67:     index = 0;
      68:     for (sp = &stringdope[0]; sp < &stringdope[NSPACE]; sp++) {
      69:         if (sp->s_topFree == NOSTR && (STRINGSIZE << index) >= s)
      70:             break;
      71:         if (sp->s_nleft >= s)
      72:             break;
      73:         index++;
      74:     }
      75:     if (sp >= &stringdope[NSPACE])
      76:         panic("String too large");
      77:     if (sp->s_topFree == NOSTR) {
      78:         index = sp - &stringdope[0];
      79:         sp->s_topFree = malloc(STRINGSIZE << index);
      80:         if (sp->s_topFree == NOSTR) {
      81:             fprintf(stderr, "No room for space %d\n", index);
      82:             panic("Internal error");
      83:         }
      84:         sp->s_nextFree = sp->s_topFree;
      85:         sp->s_nleft = STRINGSIZE << index;
      86:     }
      87:     sp->s_nleft -= s;
      88:     t = sp->s_nextFree;
      89:     sp->s_nextFree += s;
      90:     return(t);
      91: }
      92:
      93: /*
      94:  * Reset the string area to be empty.
      95:  * Called to free all strings allocated
      96:  * since last reset.
      97:  */
      98: sreset()
      99: {
     100:     register struct strings *sp;
     101:     register int index;
     102:
     103:     if (noreset)
     104:         return;
     105:     index = 0;
     106:     for (sp = &stringdope[0]; sp < &stringdope[NSPACE]; sp++) {
     107:         if (sp->s_topFree == NOSTR)
     108:             continue;
     109:         sp->s_nextFree = sp->s_topFree;
     110:         sp->s_nleft = STRINGSIZE << index;
     111:         index++;
     112:     }
     113: }
     114:
     115: /*
     116:  * Make the string area permanent.
     117:  * Meant to be called in main, after initialization.
     118:  */
     119: spreserve()
     120: {
     121:     register struct strings *sp;
     122:
     123:     for (sp = &stringdope[0]; sp < &stringdope[NSPACE]; sp++)
     124:         sp->s_topFree = NOSTR;
     125: }

#### Defined functions

salloc defined in line 56; used 11 times

- in /usr/src/ucb/Mail/aux.c line 58
- in /usr/src/ucb/Mail/cmd2.c line 163, 496
- in /usr/src/ucb/Mail/cmd3.c line 267, 362, 448
- in /usr/src/ucb/Mail/collect.c line 509
- in /usr/src/ucb/Mail/def.h line 301
- in /usr/src/ucb/Mail/names.c line 57, 141, 492

spreserve defined in line 119; used 1 times

- in /usr/src/ucb/Mail/main.c line 205

sreset defined in line 98; used 1 times

- in /usr/src/ucb/Mail/lex.c line 188

#### Defined variables

sccsid defined in line 35; never used

Last modified: 1992-10-22 Generated: 2016-12-26 | Generated by src2html V0.67 page hit count: 894 |