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util
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Text File
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1995-06-28
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34KB
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1,715 lines
/* 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 <signal.h>
#endif
#ifdef I_UNISTD
# include <unistd.h>
#endif
#ifdef I_VFORK
# include <vfork.h>
#endif
/* Put this after #includes because fork and vfork prototypes may
conflict.
*/
#ifndef HAS_VFORK
# define vfork fork
#endif
#ifdef I_FCNTL
# include <fcntl.h>
#endif
#ifdef I_SYS_FILE
# include <sys/file.h>
#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)) ) {
(void)sprintf(s,", <%s> %s %ld",
last_in_gv == argvgv ? "" : GvNAME(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;
}
#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) */
#if !defined(VMS) && !defined(RISCOS) /* VMS' my_setenv() is in VMS.c */
void /* RISC OS one is in acorn.c */
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<max; j++) /* copy environment */
tmpenv[j] = savepv(environ[j]);
tmpenv[max] = Nullch;
environ = tmpenv; /* tell exec where it is now */
}
if (!val) {
while (environ[i]) {
environ[i] = environ[i+1];
i++;
}
return;
}
if (!environ[i]) { /* does not exist yet */
Renew(environ, i+2, char*); /* just expand it a bit */
environ[i+1] = Nullch; /* make sure it's null terminated */
}
else
Safefree(environ[i]);
New(904, environ[i], strlen(nam) + strlen(val) + 2, char);
#ifndef MSDOS
(void)sprintf(environ[i],"%s=%s",nam,val);/* all that work just for this */
#else
/* MS-DOS requires environment variable names to be in uppercase */
/* [Tom Dinger, 27 August 1990: Well, it doesn't _require_ it, but
* some utilities and applications may break because they only look
* for upper case strings. (Fixed strupr() bug here.)]
*/
strcpy(environ[i],nam); strupr(environ[i]);
(void)sprintf(environ[i] + strlen(nam),"=%s",val);
#endif /* MSDOS */
}
I32
setenv_getix(nam)
char *nam;
{
register I32 i, len = strlen(nam);
for (i = 0; environ[i]; i++) {
if (strnEQ(environ[i],nam,len) && environ[i][len] == '=')
break; /* strnEQ must come first to avoid */
} /* potential SEGV's */
return i;
}
#endif /* !VMS && !RISCOS*/
#ifdef EUNICE
I32
unlnk(f) /* unlink all versions of a file */
char *f;
{
I32 i;
for (i = 0; unlink(f) >= 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 */
#ifdef 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 */
#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) && !defined(RISCOS)/* 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
#ifdef atarist
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 RISCOS
#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
#endif
#if !defined(DOSISH) && !defined(RISCOS)
#ifndef VMS /* VMS' my_pclose() 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 /* !VMS */
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;
}
#ifdef atarist
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
I32
cast_i32(f)
double f;
{
# define BIGDOUBLE 2147483648.0 /* Assume 32 bit int's ! */
# define BIGNEGDOUBLE (-2147483648.0)
if (f >= BIGDOUBLE)
return (I32)fmod(f, BIGDOUBLE);
if (f <= BIGNEGDOUBLE)
return (I32)fmod(f, BIGNEGDOUBLE);
return (I32) f;
}
# undef BIGDOUBLE
# undef BIGNEGDOUBLE
IV
cast_iv(f)
double f;
{
/* XXX This should be fixed. It assumes 32 bit IV's. */
# define BIGDOUBLE 2147483648.0 /* Assume 32 bit IV's ! */
# define BIGNEGDOUBLE (-2147483648.0)
if (f >= BIGDOUBLE)
return (IV)fmod(f, BIGDOUBLE);
if (f <= BIGNEGDOUBLE)
return (IV)fmod(f, BIGNEGDOUBLE);
return (IV) f;
}
# undef BIGDOUBLE
# undef BIGNEGDOUBLE
#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;
}
/* Amazingly enough, some systems (e.g. Dynix 3) don't have fmod.
This is a slow, stupid, but working emulation. (AD)
*/
#ifdef USE_MY_FMOD
double
my_fmod(x, y)
double x, y;
{
double i = 0.0; /* Can't use int because it can overflow */
if ((x == 0) || (y == 0))
return 0;
/* The sign of fmod is the same as the sign of x. */
if ( (x < 0 && y > 0) || (x > 0 && y < 0) )
y = -y;
if (x > 0) {
while (x - i*y > y)
i++;
} else {
while (x - i*y < y)
i++;
}
return x - i * y;
}
#endif