/* util.c * * Copyright (c) 1991-1994, Larry Wall * * You may distribute under the terms of either the GNU General Public * License or the Artistic License, as specified in the README file. * */ /* * "Very useful, no doubt, that was to Saruman; yet it seems that he was * not content." --Gandalf */ #include "EXTERN.h" #include "perl.h" #if !defined(NSIG) || defined(M_UNIX) || defined(M_XENIX) #include #endif /* Omit this -- it causes too much grief on mixed systems. #ifdef I_UNISTD # include #endif */ #ifdef I_VFORK # include #endif #ifdef I_LIMITS /* Needed for cast_xxx() functions below. */ # include #endif /* Put this after #includes because fork and vfork prototypes may conflict. */ #ifndef HAS_VFORK # define vfork fork #endif #ifdef I_FCNTL # include #endif #ifdef I_SYS_FILE # include #endif #define FLUSH #ifdef LEAKTEST static void xstat _((void)); #endif #ifndef safemalloc /* paranoid version of malloc */ /* NOTE: Do not call the next three routines directly. Use the macros * in handy.h, so that we can easily redefine everything to do tracking of * allocated hunks back to the original New to track down any memory leaks. */ char * safemalloc(size) #ifdef MSDOS unsigned long size; #else MEM_SIZE size; #endif /* MSDOS */ { char *ptr; #ifdef MSDOS if (size > 0xffff) { fprintf(stderr, "Allocation too large: %lx\n", size) FLUSH; my_exit(1); } #endif /* MSDOS */ #ifdef DEBUGGING if ((long)size < 0) croak("panic: malloc"); #endif ptr = malloc(size?size:1); /* malloc(0) is NASTY on our system */ #if !(defined(I286) || defined(atarist)) DEBUG_m(fprintf(stderr,"0x%x: (%05d) malloc %ld bytes\n",ptr,an++,(long)size)); #else DEBUG_m(fprintf(stderr,"0x%lx: (%05d) malloc %ld bytes\n",ptr,an++,(long)size)); #endif if (ptr != Nullch) return ptr; else if (nomemok) return Nullch; else { fputs(no_mem,stderr) FLUSH; my_exit(1); } /*NOTREACHED*/ } /* paranoid version of realloc */ char * saferealloc(where,size) char *where; #ifndef MSDOS MEM_SIZE size; #else unsigned long size; #endif /* MSDOS */ { char *ptr; #if !defined(STANDARD_C) && !defined(HAS_REALLOC_PROTOTYPE) char *realloc(); #endif /* !defined(STANDARD_C) && !defined(HAS_REALLOC_PROTOTYPE) */ #ifdef MSDOS if (size > 0xffff) { fprintf(stderr, "Reallocation too large: %lx\n", size) FLUSH; my_exit(1); } #endif /* MSDOS */ if (!where) croak("Null realloc"); #ifdef DEBUGGING if ((long)size < 0) croak("panic: realloc"); #endif ptr = realloc(where,size?size:1); /* realloc(0) is NASTY on our system */ #if !(defined(I286) || defined(atarist)) DEBUG_m( { fprintf(stderr,"0x%x: (%05d) rfree\n",where,an++); fprintf(stderr,"0x%x: (%05d) realloc %ld bytes\n",ptr,an++,(long)size); } ) #else DEBUG_m( { fprintf(stderr,"0x%lx: (%05d) rfree\n",where,an++); fprintf(stderr,"0x%lx: (%05d) realloc %ld bytes\n",ptr,an++,(long)size); } ) #endif if (ptr != Nullch) return ptr; else if (nomemok) return Nullch; else { fputs(no_mem,stderr) FLUSH; my_exit(1); } /*NOTREACHED*/ } /* safe version of free */ void safefree(where) char *where; { #if !(defined(I286) || defined(atarist)) DEBUG_m( fprintf(stderr,"0x%x: (%05d) free\n",where,an++)); #else DEBUG_m( fprintf(stderr,"0x%lx: (%05d) free\n",where,an++)); #endif if (where) { /*SUPPRESS 701*/ free(where); } } #endif /* !safemalloc */ #ifdef LEAKTEST #define ALIGN sizeof(long) char * safexmalloc(x,size) I32 x; MEM_SIZE size; { register char *where; where = safemalloc(size + ALIGN); xcount[x]++; where[0] = x % 100; where[1] = x / 100; return where + ALIGN; } char * safexrealloc(where,size) char *where; MEM_SIZE size; { register char *new = saferealloc(where - ALIGN, size + ALIGN); return new + ALIGN; } void safexfree(where) char *where; { I32 x; if (!where) return; where -= ALIGN; x = where[0] + 100 * where[1]; xcount[x]--; safefree(where); } static void xstat() { register I32 i; for (i = 0; i < MAXXCOUNT; i++) { if (xcount[i] > lastxcount[i]) { fprintf(stderr,"%2d %2d\t%ld\n", i / 100, i % 100, xcount[i]); lastxcount[i] = xcount[i]; } } } #endif /* LEAKTEST */ /* copy a string up to some (non-backslashed) delimiter, if any */ char * cpytill(to,from,fromend,delim,retlen) register char *to; register char *from; register char *fromend; register int delim; I32 *retlen; { char *origto = to; for (; from < fromend; from++,to++) { if (*from == '\\') { if (from[1] == delim) from++; else if (from[1] == '\\') *to++ = *from++; } else if (*from == delim) break; *to = *from; } *to = '\0'; *retlen = to - origto; return from; } /* return ptr to little string in big string, NULL if not found */ /* This routine was donated by Corey Satten. */ char * instr(big, little) register char *big; register char *little; { register char *s, *x; register I32 first; if (!little) return big; first = *little++; if (!first) return big; while (*big) { if (*big++ != first) continue; for (x=big,s=little; *s; /**/ ) { if (!*x) return Nullch; if (*s++ != *x++) { s--; break; } } if (!*s) return big-1; } return Nullch; } /* same as instr but allow embedded nulls */ char * ninstr(big, bigend, little, lend) register char *big; register char *bigend; char *little; char *lend; { register char *s, *x; register I32 first = *little; register char *littleend = lend; if (!first && little >= littleend) return big; if (bigend - big < littleend - little) return Nullch; bigend -= littleend - little++; while (big <= bigend) { if (*big++ != first) continue; for (x=big,s=little; s < littleend; /**/ ) { if (*s++ != *x++) { s--; break; } } if (s >= littleend) return big-1; } return Nullch; } /* reverse of the above--find last substring */ char * rninstr(big, bigend, little, lend) register char *big; char *bigend; char *little; char *lend; { register char *bigbeg; register char *s, *x; register I32 first = *little; register char *littleend = lend; if (!first && little >= littleend) return bigend; bigbeg = big; big = bigend - (littleend - little++); while (big >= bigbeg) { if (*big-- != first) continue; for (x=big+2,s=little; s < littleend; /**/ ) { if (*s++ != *x++) { s--; break; } } if (s >= littleend) return big+1; } return Nullch; } void fbm_compile(sv, iflag) SV *sv; I32 iflag; { register unsigned char *s; register unsigned char *table; register U32 i; register U32 len = SvCUR(sv); I32 rarest = 0; U32 frequency = 256; if (len > 255) return; /* can't have offsets that big */ Sv_Grow(sv,len+258); table = (unsigned char*)(SvPVX(sv) + len + 1); s = table - 2; for (i = 0; i < 256; i++) { table[i] = len; } i = 0; while (s >= (unsigned char*)(SvPVX(sv))) { if (table[*s] == len) { #ifndef pdp11 if (iflag) table[*s] = table[fold[*s]] = i; #else if (iflag) { I32 j; j = fold[*s]; table[j] = i; table[*s] = i; } #endif /* pdp11 */ else table[*s] = i; } s--,i++; } sv_upgrade(sv, SVt_PVBM); sv_magic(sv, Nullsv, 'B', Nullch, 0); /* deep magic */ SvVALID_on(sv); s = (unsigned char*)(SvPVX(sv)); /* deeper magic */ if (iflag) { register U32 tmp, foldtmp; SvCASEFOLD_on(sv); for (i = 0; i < len; i++) { tmp=freq[s[i]]; foldtmp=freq[fold[s[i]]]; if (tmp < frequency && foldtmp < frequency) { rarest = i; /* choose most frequent among the two */ frequency = (tmp > foldtmp) ? tmp : foldtmp; } } } else { for (i = 0; i < len; i++) { if (freq[s[i]] < frequency) { rarest = i; frequency = freq[s[i]]; } } } BmRARE(sv) = s[rarest]; BmPREVIOUS(sv) = rarest; DEBUG_r(fprintf(stderr,"rarest char %c at %d\n",BmRARE(sv),BmPREVIOUS(sv))); } char * fbm_instr(big, bigend, littlestr) unsigned char *big; register unsigned char *bigend; SV *littlestr; { register unsigned char *s; register I32 tmp; register I32 littlelen; register unsigned char *little; register unsigned char *table; register unsigned char *olds; register unsigned char *oldlittle; if (SvTYPE(littlestr) != SVt_PVBM || !SvVALID(littlestr)) { STRLEN len; char *l = SvPV(littlestr,len); if (!len) return (char*)big; return ninstr((char*)big,(char*)bigend, l, l + len); } littlelen = SvCUR(littlestr); if (SvTAIL(littlestr) && !multiline) { /* tail anchored? */ if (littlelen > bigend - big) return Nullch; little = (unsigned char*)SvPVX(littlestr); if (SvCASEFOLD(littlestr)) { /* oops, fake it */ big = bigend - littlelen; /* just start near end */ if (bigend[-1] == '\n' && little[littlelen-1] != '\n') big--; } else { s = bigend - littlelen; if (*s == *little && bcmp((char*)s,(char*)little,littlelen)==0) return (char*)s; /* how sweet it is */ else if (bigend[-1] == '\n' && little[littlelen-1] != '\n' && s > big) { s--; if (*s == *little && bcmp((char*)s,(char*)little,littlelen)==0) return (char*)s; } return Nullch; } } table = (unsigned char*)(SvPVX(littlestr) + littlelen + 1); if (--littlelen >= bigend - big) return Nullch; s = big + littlelen; oldlittle = little = table - 2; if (SvCASEFOLD(littlestr)) { /* case insensitive? */ if (s < bigend) { top1: /*SUPPRESS 560*/ if (tmp = table[*s]) { #ifdef POINTERRIGOR if (bigend - s > tmp) { s += tmp; goto top1; } #else if ((s += tmp) < bigend) goto top1; #endif return Nullch; } else { tmp = littlelen; /* less expensive than calling strncmp() */ olds = s; while (tmp--) { if (*--s == *--little || fold[*s] == *little) continue; s = olds + 1; /* here we pay the price for failure */ little = oldlittle; if (s < bigend) /* fake up continue to outer loop */ goto top1; return Nullch; } return (char *)s; } } } else { if (s < bigend) { top2: /*SUPPRESS 560*/ if (tmp = table[*s]) { #ifdef POINTERRIGOR if (bigend - s > tmp) { s += tmp; goto top2; } #else if ((s += tmp) < bigend) goto top2; #endif return Nullch; } else { tmp = littlelen; /* less expensive than calling strncmp() */ olds = s; while (tmp--) { if (*--s == *--little) continue; s = olds + 1; /* here we pay the price for failure */ little = oldlittle; if (s < bigend) /* fake up continue to outer loop */ goto top2; return Nullch; } return (char *)s; } } } return Nullch; } char * screaminstr(bigstr, littlestr) SV *bigstr; SV *littlestr; { register unsigned char *s, *x; register unsigned char *big; register I32 pos; register I32 previous; register I32 first; register unsigned char *little; register unsigned char *bigend; register unsigned char *littleend; if ((pos = screamfirst[BmRARE(littlestr)]) < 0) return Nullch; little = (unsigned char *)(SvPVX(littlestr)); littleend = little + SvCUR(littlestr); first = *little++; previous = BmPREVIOUS(littlestr); big = (unsigned char *)(SvPVX(bigstr)); bigend = big + SvCUR(bigstr); while (pos < previous) { if (!(pos += screamnext[pos])) return Nullch; } #ifdef POINTERRIGOR if (SvCASEFOLD(littlestr)) { /* case insignificant? */ do { if (big[pos-previous] != first && big[pos-previous] != fold[first]) continue; for (x=big+pos+1-previous,s=little; s < littleend; /**/ ) { if (x >= bigend) return Nullch; if (*s++ != *x++ && fold[*(s-1)] != *(x-1)) { s--; break; } } if (s == littleend) return (char *)(big+pos-previous); } while ( pos += screamnext[pos] /* does this goof up anywhere? */ ); } else { do { if (big[pos-previous] != first) continue; for (x=big+pos+1-previous,s=little; s < littleend; /**/ ) { if (x >= bigend) return Nullch; if (*s++ != *x++) { s--; break; } } if (s == littleend) return (char *)(big+pos-previous); } while ( pos += screamnext[pos] ); } #else /* !POINTERRIGOR */ big -= previous; if (SvCASEFOLD(littlestr)) { /* case insignificant? */ do { if (big[pos] != first && big[pos] != fold[first]) continue; for (x=big+pos+1,s=little; s < littleend; /**/ ) { if (x >= bigend) return Nullch; if (*s++ != *x++ && fold[*(s-1)] != *(x-1)) { s--; break; } } if (s == littleend) return (char *)(big+pos); } while ( pos += screamnext[pos] /* does this goof up anywhere? */ ); } else { do { if (big[pos] != first) continue; for (x=big+pos+1,s=little; s < littleend; /**/ ) { if (x >= bigend) return Nullch; if (*s++ != *x++) { s--; break; } } if (s == littleend) return (char *)(big+pos); } while ( pos += screamnext[pos] ); } #endif /* POINTERRIGOR */ return Nullch; } I32 ibcmp(a,b,len) register U8 *a; register U8 *b; register I32 len; { while (len--) { if (*a == *b) { a++,b++; continue; } if (fold[*a++] == *b++) continue; return 1; } return 0; } /* copy a string to a safe spot */ char * savepv(sv) char *sv; { register char *newaddr; New(902,newaddr,strlen(sv)+1,char); (void)strcpy(newaddr,sv); return newaddr; } /* same thing but with a known length */ char * savepvn(sv, len) char *sv; register I32 len; { register char *newaddr; New(903,newaddr,len+1,char); Copy(sv,newaddr,len,char); /* might not be null terminated */ newaddr[len] = '\0'; /* is now */ return newaddr; } #if !defined(I_STDARG) && !defined(I_VARARGS) /* * Fallback on the old hackers way of doing varargs */ /*VARARGS1*/ char * mess(pat,a1,a2,a3,a4) char *pat; long a1, a2, a3, a4; { char *s; I32 usermess = strEQ(pat,"%s"); SV *tmpstr; s = buf; if (usermess) { tmpstr = sv_newmortal(); sv_setpv(tmpstr, (char*)a1); *s++ = SvPVX(tmpstr)[SvCUR(tmpstr)-1]; } else { (void)sprintf(s,pat,a1,a2,a3,a4); s += strlen(s); } if (s[-1] != '\n') { if (dirty) strcpy(s, " during global destruction.\n"); else { if (curcop->cop_line) { (void)sprintf(s," at %s line %ld", SvPVX(GvSV(curcop->cop_filegv)), (long)curcop->cop_line); s += strlen(s); } if (GvIO(last_in_gv) && IoLINES(GvIOp(last_in_gv)) ) { (void)sprintf(s,", <%s> %s %ld", last_in_gv == argvgv ? "" : GvENAME(last_in_gv), strEQ(rs,"\n") ? "line" : "chunk", (long)IoLINES(GvIOp(last_in_gv))); s += strlen(s); } (void)strcpy(s,".\n"); } if (usermess) sv_catpv(tmpstr,buf+1); } if (usermess) return SvPVX(tmpstr); else return buf; } /*VARARGS1*/ void croak(pat,a1,a2,a3,a4) char *pat; long a1, a2, a3, a4; { char *tmps; char *message; HV *stash; GV *gv; CV *cv; message = mess(pat,a1,a2,a3,a4); if (diehook && (cv = sv_2cv(diehook, &stash, &gv, 0)) && !CvDEPTH(cv)) { dSP; PUSHMARK(sp); EXTEND(sp, 1); PUSHs(sv_2mortal(newSVpv(message,0))); PUTBACK; perl_call_sv((SV*)cv, G_DISCARD); } if (in_eval) { restartop = die_where(message); longjmp(top_env, 3); } fputs(message,stderr); (void)fflush(stderr); if (e_fp) (void)UNLINK(e_tmpname); statusvalue = SHIFTSTATUS(statusvalue); #ifdef VMS my_exit((U32)vaxc$errno?vaxc$errno:errno?errno:statusvalue?statusvalue:SS$_ABORT); #else my_exit((U32)((errno&255)?errno:((statusvalue&255)?statusvalue:255))); #endif } /*VARARGS1*/ void warn(pat,a1,a2,a3,a4) char *pat; long a1, a2, a3, a4; { char *message; SV *sv; HV *stash; GV *gv; CV *cv; message = mess(pat,a1,a2,a3,a4); if (warnhook && (cv = sv_2cv(warnhook, &stash, &gv, 0)) && !CvDEPTH(cv)) { dSP; PUSHMARK(sp); EXTEND(sp, 1); PUSHs(sv_2mortal(newSVpv(message,0))); PUTBACK; perl_call_sv((SV*)cv, G_DISCARD); } else { fputs(message,stderr); #ifdef LEAKTEST DEBUG_L(xstat()); #endif (void)fflush(stderr); } } #else /* !defined(I_STDARG) && !defined(I_VARARGS) */ #ifdef I_STDARG char * mess(char *pat, va_list *args) #else /*VARARGS0*/ char * mess(pat, args) char *pat; va_list *args; #endif { char *s; SV *tmpstr; I32 usermess; #ifndef HAS_VPRINTF #ifdef USE_CHAR_VSPRINTF char *vsprintf(); #else I32 vsprintf(); #endif #endif s = buf; usermess = strEQ(pat, "%s"); if (usermess) { tmpstr = sv_newmortal(); sv_setpv(tmpstr, va_arg(*args, char *)); *s++ = SvPVX(tmpstr)[SvCUR(tmpstr)-1]; } else { (void) vsprintf(s,pat,*args); s += strlen(s); } va_end(*args); if (s[-1] != '\n') { if (dirty) strcpy(s, " during global destruction.\n"); else { if (curcop->cop_line) { (void)sprintf(s," at %s line %ld", SvPVX(GvSV(curcop->cop_filegv)), (long)curcop->cop_line); s += strlen(s); } if (GvIO(last_in_gv) && IoLINES(GvIOp(last_in_gv))) { bool line_mode = (RsSIMPLE(rs) && SvLEN(rs) == 1 && *SvPVX(rs) == '\n'); (void)sprintf(s,", <%s> %s %ld", last_in_gv == argvgv ? "" : GvNAME(last_in_gv), line_mode ? "line" : "chunk", (long)IoLINES(GvIOp(last_in_gv))); s += strlen(s); } (void)strcpy(s,".\n"); } if (usermess) sv_catpv(tmpstr,buf+1); } if (usermess) return SvPVX(tmpstr); else return buf; } #ifdef I_STDARG void croak(char* pat, ...) #else /*VARARGS0*/ void croak(pat, va_alist) char *pat; va_dcl #endif { va_list args; char *message; HV *stash; GV *gv; CV *cv; #ifdef I_STDARG va_start(args, pat); #else va_start(args); #endif message = mess(pat, &args); va_end(args); if (diehook && (cv = sv_2cv(diehook, &stash, &gv, 0)) && !CvDEPTH(cv)) { dSP; PUSHMARK(sp); EXTEND(sp, 1); PUSHs(sv_2mortal(newSVpv(message,0))); PUTBACK; perl_call_sv((SV*)cv, G_DISCARD); } if (in_eval) { restartop = die_where(message); longjmp(top_env, 3); } fputs(message,stderr); (void)fflush(stderr); if (e_fp) (void)UNLINK(e_tmpname); statusvalue = SHIFTSTATUS(statusvalue); #ifdef VMS my_exit((U32)(vaxc$errno?vaxc$errno:(statusvalue?statusvalue:44))); #else my_exit((U32)((errno&255)?errno:((statusvalue&255)?statusvalue:255))); #endif } void #ifdef I_STDARG warn(char* pat,...) #else /*VARARGS0*/ warn(pat,va_alist) char *pat; va_dcl #endif { va_list args; char *message; HV *stash; GV *gv; CV *cv; #ifdef I_STDARG va_start(args, pat); #else va_start(args); #endif message = mess(pat, &args); va_end(args); if (warnhook && (cv = sv_2cv(warnhook, &stash, &gv, 0)) && !CvDEPTH(cv)) { dSP; PUSHMARK(sp); EXTEND(sp, 1); PUSHs(sv_2mortal(newSVpv(message,0))); PUTBACK; perl_call_sv((SV*)cv, G_DISCARD); } else { fputs(message,stderr); #ifdef LEAKTEST DEBUG_L(xstat()); #endif (void)fflush(stderr); } } #endif /* !defined(I_STDARG) && !defined(I_VARARGS) */ #ifndef VMS /* VMS' my_setenv() is in VMS.c */ void my_setenv(nam,val) char *nam, *val; { register I32 i=setenv_getix(nam); /* where does it go? */ if (environ == origenviron) { /* need we copy environment? */ I32 j; I32 max; char **tmpenv; /*SUPPRESS 530*/ for (max = i; environ[max]; max++) ; New(901,tmpenv, max+2, char*); for (j=0; j= 0; i++) ; return i ? 0 : -1; } #endif #if !defined(HAS_BCOPY) || !defined(HAS_SAFE_BCOPY) char * my_bcopy(from,to,len) register char *from; register char *to; register I32 len; { char *retval = to; if (from - to >= 0) { while (len--) *to++ = *from++; } else { to += len; from += len; while (len--) *(--to) = *(--from); } return retval; } #endif #if !defined(HAS_BZERO) && !defined(HAS_MEMSET) char * my_bzero(loc,len) register char *loc; register I32 len; { char *retval = loc; while (len--) *loc++ = 0; return retval; } #endif #ifndef HAS_MEMCMP I32 my_memcmp(s1,s2,len) register unsigned char *s1; register unsigned char *s2; register I32 len; { register I32 tmp; while (len--) { if (tmp = *s1++ - *s2++) return tmp; } return 0; } #endif /* HAS_MEMCMP */ #if defined(I_STDARG) || defined(I_VARARGS) #ifndef HAS_VPRINTF #ifdef USE_CHAR_VSPRINTF char * #else int #endif vsprintf(dest, pat, args) char *dest, *pat, *args; { FILE fakebuf; fakebuf._ptr = dest; fakebuf._cnt = 32767; #ifndef _IOSTRG #define _IOSTRG 0 #endif fakebuf._flag = _IOWRT|_IOSTRG; _doprnt(pat, args, &fakebuf); /* what a kludge */ (void)putc('\0', &fakebuf); #ifdef USE_CHAR_VSPRINTF return(dest); #else return 0; /* perl doesn't use return value */ #endif } int vfprintf(fd, pat, args) FILE *fd; char *pat, *args; { _doprnt(pat, args, fd); return 0; /* wrong, but perl doesn't use the return value */ } #endif /* HAS_VPRINTF */ #endif /* I_VARARGS || I_STDARGS */ #ifdef MYSWAP #if BYTEORDER != 0x4321 short #ifndef CAN_PROTOTYPE my_swap(s) short s; #else my_swap(short s) #endif { #if (BYTEORDER & 1) == 0 short result; result = ((s & 255) << 8) + ((s >> 8) & 255); return result; #else return s; #endif } long #ifndef CAN_PROTOTYPE my_htonl(l) register long l; #else my_htonl(long l) #endif { union { long result; char c[sizeof(long)]; } u; #if BYTEORDER == 0x1234 u.c[0] = (l >> 24) & 255; u.c[1] = (l >> 16) & 255; u.c[2] = (l >> 8) & 255; u.c[3] = l & 255; return u.result; #else #if ((BYTEORDER - 0x1111) & 0x444) || !(BYTEORDER & 0xf) croak("Unknown BYTEORDER\n"); #else register I32 o; register I32 s; for (o = BYTEORDER - 0x1111, s = 0; s < (sizeof(long)*8); o >>= 4, s += 8) { u.c[o & 0xf] = (l >> s) & 255; } return u.result; #endif #endif } long #ifndef CAN_PROTOTYPE my_ntohl(l) register long l; #else my_ntohl(long l) #endif { union { long l; char c[sizeof(long)]; } u; #if BYTEORDER == 0x1234 u.c[0] = (l >> 24) & 255; u.c[1] = (l >> 16) & 255; u.c[2] = (l >> 8) & 255; u.c[3] = l & 255; return u.l; #else #if ((BYTEORDER - 0x1111) & 0x444) || !(BYTEORDER & 0xf) croak("Unknown BYTEORDER\n"); #else register I32 o; register I32 s; u.l = l; l = 0; for (o = BYTEORDER - 0x1111, s = 0; s < (sizeof(long)*8); o >>= 4, s += 8) { l |= (u.c[o & 0xf] & 255) << s; } return l; #endif #endif } #endif /* BYTEORDER != 0x4321 */ #endif /* MYSWAP */ /* * Little-endian byte order functions - 'v' for 'VAX', or 'reVerse'. * If these functions are defined, * the BYTEORDER is neither 0x1234 nor 0x4321. * However, this is not assumed. * -DWS */ #define HTOV(name,type) \ type \ name (n) \ register type n; \ { \ union { \ type value; \ char c[sizeof(type)]; \ } u; \ register I32 i; \ register I32 s; \ for (i = 0, s = 0; i < sizeof(u.c); i++, s += 8) { \ u.c[i] = (n >> s) & 0xFF; \ } \ return u.value; \ } #define VTOH(name,type) \ type \ name (n) \ register type n; \ { \ union { \ type value; \ char c[sizeof(type)]; \ } u; \ register I32 i; \ register I32 s; \ u.value = n; \ n = 0; \ for (i = 0, s = 0; i < sizeof(u.c); i++, s += 8) { \ n += (u.c[i] & 0xFF) << s; \ } \ return n; \ } #if defined(HAS_HTOVS) && !defined(htovs) HTOV(htovs,short) #endif #if defined(HAS_HTOVL) && !defined(htovl) HTOV(htovl,long) #endif #if defined(HAS_VTOHS) && !defined(vtohs) VTOH(vtohs,short) #endif #if defined(HAS_VTOHL) && !defined(vtohl) VTOH(vtohl,long) #endif #if !defined(DOSISH) && !defined(VMS) /* VMS' my_popen() is in VMS.c */ FILE * my_popen(cmd,mode) char *cmd; char *mode; { int p[2]; register I32 this, that; register I32 pid; SV *sv; I32 doexec = strNE(cmd,"-"); if (pipe(p) < 0) return Nullfp; this = (*mode == 'w'); that = !this; if (tainting) { if (doexec) { taint_env(); taint_proper("Insecure %s%s", "EXEC"); } } while ((pid = (doexec?vfork():fork())) < 0) { if (errno != EAGAIN) { close(p[this]); if (!doexec) croak("Can't fork"); return Nullfp; } sleep(5); } if (pid == 0) { GV* tmpgv; #define THIS that #define THAT this close(p[THAT]); if (p[THIS] != (*mode == 'r')) { dup2(p[THIS], *mode == 'r'); close(p[THIS]); } if (doexec) { #if !defined(HAS_FCNTL) || !defined(F_SETFD) int fd; #ifndef NOFILE #define NOFILE 20 #endif for (fd = maxsysfd + 1; fd < NOFILE; fd++) close(fd); #endif do_exec(cmd); /* may or may not use the shell */ _exit(1); } /*SUPPRESS 560*/ if (tmpgv = gv_fetchpv("$",TRUE, SVt_PV)) sv_setiv(GvSV(tmpgv),(I32)getpid()); forkprocess = 0; hv_clear(pidstatus); /* we have no children */ return Nullfp; #undef THIS #undef THAT } do_execfree(); /* free any memory malloced by child on vfork */ close(p[that]); if (p[that] < p[this]) { dup2(p[this], p[that]); close(p[this]); p[this] = p[that]; } sv = *av_fetch(fdpid,p[this],TRUE); (void)SvUPGRADE(sv,SVt_IV); SvIVX(sv) = pid; forkprocess = pid; return fdopen(p[this], mode); } #else #if defined(atarist) || defined(OS2) FILE *popen(); FILE * my_popen(cmd,mode) char *cmd; char *mode; { return popen(cmd, mode); } #endif #endif /* !DOSISH */ #ifdef DUMP_FDS dump_fds(s) char *s; { int fd; struct stat tmpstatbuf; fprintf(stderr,"%s", s); for (fd = 0; fd < 32; fd++) { if (Fstat(fd,&tmpstatbuf) >= 0) fprintf(stderr," %d",fd); } fprintf(stderr,"\n"); } #endif #ifndef HAS_DUP2 int dup2(oldfd,newfd) int oldfd; int newfd; { #if defined(HAS_FCNTL) && defined(F_DUPFD) if (oldfd == newfd) return oldfd; close(newfd); return fcntl(oldfd, F_DUPFD, newfd); #else int fdtmp[256]; I32 fdx = 0; int fd; if (oldfd == newfd) return oldfd; close(newfd); while ((fd = dup(oldfd)) != newfd && fd >= 0) /* good enough for low fd's */ fdtmp[fdx++] = fd; while (fdx > 0) close(fdtmp[--fdx]); return fd; #endif } #endif #if !defined(DOSISH) && !defined(VMS) /* VMS' my_popen() is in VMS.c */ I32 my_pclose(ptr) FILE *ptr; { Signal_t (*hstat)(), (*istat)(), (*qstat)(); int status; SV **svp; int pid; svp = av_fetch(fdpid,fileno(ptr),TRUE); pid = (int)SvIVX(*svp); SvREFCNT_dec(*svp); *svp = &sv_undef; fclose(ptr); #ifdef UTS if(kill(pid, 0) < 0) { return(pid); } /* HOM 12/23/91 */ #endif hstat = signal(SIGHUP, SIG_IGN); istat = signal(SIGINT, SIG_IGN); qstat = signal(SIGQUIT, SIG_IGN); do { pid = wait4pid(pid, &status, 0); } while (pid == -1 && errno == EINTR); signal(SIGHUP, hstat); signal(SIGINT, istat); signal(SIGQUIT, qstat); return(pid < 0 ? pid : status); } #endif /* !DOSISH */ #if !defined(DOSISH) || defined(OS2) I32 wait4pid(pid,statusp,flags) int pid; int *statusp; int flags; { SV *sv; SV** svp; char spid[16]; if (!pid) return -1; if (pid > 0) { sprintf(spid, "%d", pid); svp = hv_fetch(pidstatus,spid,strlen(spid),FALSE); if (svp && *svp != &sv_undef) { *statusp = SvIVX(*svp); (void)hv_delete(pidstatus,spid,strlen(spid),G_DISCARD); return pid; } } else { HE *entry; hv_iterinit(pidstatus); if (entry = hv_iternext(pidstatus)) { pid = atoi(hv_iterkey(entry,(I32*)statusp)); sv = hv_iterval(pidstatus,entry); *statusp = SvIVX(sv); sprintf(spid, "%d", pid); (void)hv_delete(pidstatus,spid,strlen(spid),G_DISCARD); return pid; } } #ifdef HAS_WAITPID return waitpid(pid,statusp,flags); #else #ifdef HAS_WAIT4 return wait4((pid==-1)?0:pid,statusp,flags,Null(struct rusage *)); #else { I32 result; if (flags) croak("Can't do waitpid with flags"); else { while ((result = wait(statusp)) != pid && pid > 0 && result >= 0) pidgone(result,*statusp); if (result < 0) *statusp = -1; } return result; } #endif #endif } #endif /* !DOSISH */ void /*SUPPRESS 590*/ pidgone(pid,status) int pid; int status; { register SV *sv; char spid[16]; sprintf(spid, "%d", pid); sv = *hv_fetch(pidstatus,spid,strlen(spid),TRUE); (void)SvUPGRADE(sv,SVt_IV); SvIVX(sv) = status; return; } #if defined(atarist) || defined(OS2) int pclose(); I32 my_pclose(ptr) FILE *ptr; { return pclose(ptr); } #endif void repeatcpy(to,from,len,count) register char *to; register char *from; I32 len; register I32 count; { register I32 todo; register char *frombase = from; if (len == 1) { todo = *from; while (count-- > 0) *to++ = todo; return; } while (count-- > 0) { for (todo = len; todo > 0; todo--) { *to++ = *from++; } from = frombase; } } #ifndef CASTNEGFLOAT U32 cast_ulong(f) double f; { long along; #if CASTFLAGS & 2 # define BIGDOUBLE 2147483648.0 if (f >= BIGDOUBLE) return (unsigned long)(f-(long)(f/BIGDOUBLE)*BIGDOUBLE)|0x80000000; #endif if (f >= 0.0) return (unsigned long)f; along = (long)f; return (unsigned long)along; } # undef BIGDOUBLE #endif #ifndef CASTI32 /* Look for MAX and MIN integral values. If we can't find them, we'll use 32-bit two's complement defaults. */ #ifndef LONG_MAX # ifdef MAXLONG /* Often used in */ # define LONG_MAX MAXLONG # else # define LONG_MAX 2147483647L # endif #endif #ifndef LONG_MIN # define LONG_MIN (-LONG_MAX - 1) #endif #ifndef ULONG_MAX # ifdef MAXULONG # define LONG_MAX MAXULONG # else # define ULONG_MAX 4294967295L # endif #endif /* Unfortunately, on some systems the cast_uv() function doesn't work with the system-supplied definition of ULONG_MAX. The comparison (f >= ULONG_MAX) always comes out true. It must be a problem with the compiler constant folding. In any case, this workaround should be fine on any two's complement system. If it's not, supply a '-DMY_ULONG_MAX=whatever' in your ccflags. --Andy Dougherty */ #ifndef MY_ULONG_MAX # define MY_ULONG_MAX ((UV)LONG_MAX * (UV)2 + (UV)1) #endif I32 cast_i32(f) double f; { if (f >= LONG_MAX) return (I32) LONG_MAX; if (f <= LONG_MIN) return (I32) LONG_MIN; return (I32) f; } IV cast_iv(f) double f; { if (f >= LONG_MAX) return (IV) LONG_MAX; if (f <= LONG_MIN) return (IV) LONG_MIN; return (IV) f; } UV cast_uv(f) double f; { if (f >= MY_ULONG_MAX) return (UV) MY_ULONG_MAX; return (UV) f; } #endif #ifndef HAS_RENAME I32 same_dirent(a,b) char *a; char *b; { char *fa = strrchr(a,'/'); char *fb = strrchr(b,'/'); struct stat tmpstatbuf1; struct stat tmpstatbuf2; #ifndef MAXPATHLEN #define MAXPATHLEN 1024 #endif char tmpbuf[MAXPATHLEN+1]; if (fa) fa++; else fa = a; if (fb) fb++; else fb = b; if (strNE(a,b)) return FALSE; if (fa == a) strcpy(tmpbuf,"."); else strncpy(tmpbuf, a, fa - a); if (Stat(tmpbuf, &tmpstatbuf1) < 0) return FALSE; if (fb == b) strcpy(tmpbuf,"."); else strncpy(tmpbuf, b, fb - b); if (Stat(tmpbuf, &tmpstatbuf2) < 0) return FALSE; return tmpstatbuf1.st_dev == tmpstatbuf2.st_dev && tmpstatbuf1.st_ino == tmpstatbuf2.st_ino; } #endif /* !HAS_RENAME */ unsigned long scan_oct(start, len, retlen) char *start; I32 len; I32 *retlen; { register char *s = start; register unsigned long retval = 0; while (len && *s >= '0' && *s <= '7') { retval <<= 3; retval |= *s++ - '0'; len--; } if (dowarn && len && (*s == '8' || *s == '9')) warn("Illegal octal digit ignored"); *retlen = s - start; return retval; } unsigned long scan_hex(start, len, retlen) char *start; I32 len; I32 *retlen; { register char *s = start; register unsigned long retval = 0; char *tmp; while (len-- && *s && (tmp = strchr(hexdigit, *s))) { retval <<= 4; retval |= (tmp - hexdigit) & 15; s++; } *retlen = s - start; return retval; }