# 2.11BSD#431 - /usr/src/new/PORT/perl.1.0.16/x2p/util.c

##### Functions

    cpy2              X
    cpytill           X
    envix             X
    fatal             X
    growstr           X
    instr             X
    safecat           X
    safecpy           X
    safefree          X
    safemalloc        X
    saferealloc       X
    savestr           X
    setenv            X

##### Macros

    FLUSH             X
    MEM_SIZE          X

       1: /* $Header: util.c,v 1.0 87/12/18 13:07:34 root Exp $
       2:  *
       3:  * $Log:	util.c,v $
       4:  * Revision 1.0  87/12/18  13:07:34  root
       5:  * Initial revision
       6:  *
       7:  */
       8:
       9: #include <stdio.h>
      10:
      11: #include "handy.h"
      12: #include "EXTERN.h"
      13: #include "a2p.h"
      14: #include "INTERN.h"
      15: #include "util.h"
      16:
      17: #define FLUSH
      18: #define MEM_SIZE unsigned int
      19:
      20: static char nomem[] = "Out of memory!\n";
      21:
      22: /* paranoid version of malloc */
      23:
      24: static int an = 0;
      25:
      26: char *
      27: safemalloc(size)
      28: MEM_SIZE size;
      29: {
      30:     char *ptr;
      31:     char *malloc();
      32:
      33:     ptr = malloc(size?size:1);  /* malloc(0) is NASTY on our system */
      34: #ifdef DEBUGGING
      35:     if (debug & 128)
      36:     fprintf(stderr,"0x%x: (%05d) malloc %d bytes\n",ptr,an++,size);
      37: #endif
      38:     if (ptr != Nullch)
      39:     return ptr;
      40:     else {
      41:     fputs(nomem,stdout) FLUSH;
      42:     exit(1);
      43:     }
      44:     /*NOTREACHED*/
      45: }
      46:
      47: /* paranoid version of realloc */
      48:
      49: char *
      50: saferealloc(where,size)
      51: char *where;
      52: MEM_SIZE size;
      53: {
      54:     char *ptr;
      55:     char *realloc();
      56:
      57:     ptr = realloc(where,size?size:1);   /* realloc(0) is NASTY on our system */
      58: #ifdef DEBUGGING
      59:     if (debug & 128) {
      60:     fprintf(stderr,"0x%x: (%05d) rfree\n",where,an++);
      61:     fprintf(stderr,"0x%x: (%05d) realloc %d bytes\n",ptr,an++,size);
      62:     }
      63: #endif
      64:     if (ptr != Nullch)
      65:     return ptr;
      66:     else {
      67:     fputs(nomem,stdout) FLUSH;
      68:     exit(1);
      69:     }
      70:     /*NOTREACHED*/
      71: }
      72:
      73: /* safe version of free */
      74:
      75: safefree(where)
      76: char *where;
      77: {
      78: #ifdef DEBUGGING
      79:     if (debug & 128)
      80:     fprintf(stderr,"0x%x: (%05d) free\n",where,an++);
      81: #endif
      82:     free(where);
      83: }
      84:
      85: /* safe version of string copy */
      86:
      87: char *
      88: safecpy(to,from,len)
      89: char *to;
      90: register char *from;
      91: register int len;
      92: {
      93:     register char *dest = to;
      94:
      95:     if (from != Nullch)
      96:     for (len--; len && (*dest++ = *from++); len--) ;
      97:     *dest = '\0';
      98:     return to;
      99: }
     100:
     101: #ifdef undef
     102: /* safe version of string concatenate, with \n deletion and space padding */
     103:
     104: char *
     105: safecat(to,from,len)
     106: char *to;
     107: register char *from;
     108: register int len;
     109: {
     110:     register char *dest = to;
     111:
     112:     len--;              /* leave room for null */
     113:     if (*dest) {
     114:     while (len && *dest++) len--;
     115:     if (len) {
     116:         len--;
     117:         *(dest-1) = ' ';
     118:     }
     119:     }
     120:     if (from != Nullch)
     121:     while (len && (*dest++ = *from++)) len--;
     122:     if (len)
     123:     dest--;
     124:     if (*(dest-1) == '\n')
     125:     dest--;
     126:     *dest = '\0';
     127:     return to;
     128: }
     129: #endif
     130:
     131: /* copy a string up to some (non-backslashed) delimiter, if any */
     132:
     133: char *
     134: cpytill(to,from,delim)
     135: register char *to, *from;
     136: register int delim;
     137: {
     138:     for (; *from; from++,to++) {
     139:     if (*from == '\\' && from[1] == delim)
     140:         *to++ = *from++;
     141:     else if (*from == delim)
     142:         break;
     143:     *to = *from;
     144:     }
     145:     *to = '\0';
     146:     return from;
     147: }
     148:
     149: char *
     150: cpy2(to,from,delim)
     151: register char *to, *from;
     152: register int delim;
     153: {
     154:     for (; *from; from++,to++) {
     155:     if (*from == '\\' && from[1] == delim)
     156:         *to++ = *from++;
     157:     else if (*from == '$')
     158:         *to++ = '\\';
     159:     else if (*from == delim)
     160:         break;
     161:     *to = *from;
     162:     }
     163:     *to = '\0';
     164:     return from;
     165: }
     166:
     167: /* return ptr to little string in big string, NULL if not found */
     168:
     169: char *
     170: instr(big, little)
     171: char *big, *little;
     172:
     173: {
     174:     register char *t, *s, *x;
     175:
     176:     for (t = big; *t; t++) {
     177:     for (x=t,s=little; *s; x++,s++) {
     178:         if (!*x)
     179:         return Nullch;
     180:         if (*s != *x)
     181:         break;
     182:     }
     183:     if (!*s)
     184:         return t;
     185:     }
     186:     return Nullch;
     187: }
     188:
     189: /* copy a string to a safe spot */
     190:
     191: char *
     192: savestr(str)
     193: char *str;
     194: {
     195:     register char *newaddr = safemalloc((MEM_SIZE)(strlen(str)+1));
     196:
     197:     (void)strcpy(newaddr,str);
     198:     return newaddr;
     199: }
     200:
     201: /* grow a static string to at least a certain length */
     202:
     203: void
     204: growstr(strptr,curlen,newlen)
     205: char **strptr;
     206: int *curlen;
     207: int newlen;
     208: {
     209:     if (newlen > *curlen) {     /* need more room? */
     210:     if (*curlen)
     211:         *strptr = saferealloc(*strptr,(MEM_SIZE)newlen);
     212:     else
     213:         *strptr = safemalloc((MEM_SIZE)newlen);
     214:     *curlen = newlen;
     215:     }
     216: }
     217:
     218: /*VARARGS1*/
     219: fatal(pat,a1,a2,a3,a4)
     220: char *pat;
     221: {
     222:     fprintf(stderr,pat,a1,a2,a3,a4);
     223:     exit(1);
     224: }
     225:
     226: static bool firstsetenv = TRUE;
     227: extern char **environ;
     228:
     229: void
     230: setenv(nam,val)
     231: char *nam, *val;
     232: {
     233:     register int i=envix(nam);      /* where does it go? */
     234:
     235:     if (!environ[i]) {          /* does not exist yet */
     236:     if (firstsetenv) {      /* need we copy environment? */
     237:         int j;
     238: #ifndef lint
     239:         char **tmpenv = (char**)    /* point our wand at memory */
     240:         safemalloc((i+2) * sizeof(char*));
     241: #else
     242:         char **tmpenv = Null(char **);
     243: #endif /* lint */
     244:
     245:         firstsetenv = FALSE;
     246:         for (j=0; j<i; j++)     /* copy environment */
     247:         tmpenv[j] = environ[j];
     248:         environ = tmpenv;       /* tell exec where it is now */
     249:     }
     250: #ifndef lint
     251:     else
     252:         environ = (char**) saferealloc((char*) environ,
     253:         (i+2) * sizeof(char*));
     254:                     /* just expand it a bit */
     255: #endif /* lint */
     256:     environ[i+1] = Nullch;  /* make sure it's null terminated */
     257:     }
     258:     environ[i] = safemalloc(strlen(nam) + strlen(val) + 2);
     259:                     /* this may or may not be in */
     260:                     /* the old environ structure */
     261:     sprintf(environ[i],"%s=%s",nam,val);/* all that work just for this */
     262: }
     263:
     264: int
     265: envix(nam)
     266: char *nam;
     267: {
     268:     register int i, len = strlen(nam);
     269:
     270:     for (i = 0; environ[i]; i++) {
     271:     if (strnEQ(environ[i],nam,len) && environ[i][len] == '=')
     272:         break;          /* strnEQ must come first to avoid */
     273:     }                   /* potential SEGV's */
     274:     return i;
     275: }

#### Defined functions

cpy2 defined in line 149; used 2 times

- in /usr/src/new/PORT/perl.1.0.16/x2p/a2py.c line 341
- in /usr/src/new/PORT/perl.1.0.16/x2p/util.h line 21

cpytill defined in line 133; used 3 times

- in /usr/src/new/PORT/perl.1.0.16/x2p/a2py.c line 540
- in /usr/src/new/PORT/perl.1.0.16/x2p/util.h line 20
- in /usr/src/new/PORT/perl.1.0.16/x2p/walk.c line 693

envix defined in line 264; used 2 times

- in line 233
- in /usr/src/new/PORT/perl.1.0.16/x2p/util.h line 33

fatal defined in line 219; used 15 times

- in /usr/src/new/PORT/perl.1.0.16/x2p/a2py.c line 60, 77, 87, 343, 538-542(2), 604, 616, 630, 646, 664, 684
- in /usr/src/new/PORT/perl.1.0.16/x2p/walk.c line 695, 998, 1441

growstr defined in line 203; used 2 times

- in /usr/src/new/PORT/perl.1.0.16/x2p/a2p.h line 209
- in /usr/src/new/PORT/perl.1.0.16/x2p/util.h line 36

instr defined in line 169; used 1 times

- in /usr/src/new/PORT/perl.1.0.16/x2p/util.h line 22

safecat defined in line 104; used 1 times

- in /usr/src/new/PORT/perl.1.0.16/x2p/util.h line 19

safecpy defined in line 87; used 1 times

- in /usr/src/new/PORT/perl.1.0.16/x2p/util.h line 18

safefree defined in line 75; used 8 times

- in /usr/src/new/PORT/perl.1.0.16/x2p/hash.c line 71, 120-123(3)
- in /usr/src/new/PORT/perl.1.0.16/x2p/str.c line 237, 244
- in /usr/src/new/PORT/perl.1.0.16/x2p/walk.c line 724-725(2)

safemalloc defined in line 26; used 11 times

- in line 195, 213, 240, 258
- in /usr/src/new/PORT/perl.1.0.16/x2p/a2py.c line 592
- in /usr/src/new/PORT/perl.1.0.16/x2p/hash.c line 75, 172-174(2)
- in /usr/src/new/PORT/perl.1.0.16/x2p/str.c line 213, 426
- in /usr/src/new/PORT/perl.1.0.16/x2p/util.h line 16

saferealloc defined in line 49; used 5 times

- in line 211, 252
- in /usr/src/new/PORT/perl.1.0.16/x2p/hash.c line 143
- in /usr/src/new/PORT/perl.1.0.16/x2p/str.c line 423
- in /usr/src/new/PORT/perl.1.0.16/x2p/util.h line 17

savestr defined in line 191; used 7 times

- in /usr/src/new/PORT/perl.1.0.16/x2p/a2py.c line 52, 69
- in /usr/src/new/PORT/perl.1.0.16/x2p/hash.c line 77
- in /usr/src/new/PORT/perl.1.0.16/x2p/util.h line 30
- in /usr/src/new/PORT/perl.1.0.16/x2p/walk.c line 114, 696-697(2)

setenv defined in line 229; used 1 times

- in /usr/src/new/PORT/perl.1.0.16/x2p/util.h line 32

#### Defined variables

an defined in line 24; used 4 times

- in line 36, 60-61(2), 80

nomem defined in line 20; used 2 times

- in line 41, 67

#### Defined macros

FLUSH defined in line 17; used 2 times

- in line 41, 67

MEM_SIZE defined in line 18; used 5 times

- in line 28, 52, 195, 211-213(2)

Last modified: 2002-12-19 Generated: 2016-12-26 | Generated by src2html V0.67 page hit count: 1650 |