d/freebsd-dev
1
0
Fork 0
Code Issues Pull Requests Packages Projects Releases Wiki Activity
ff6b7ba98e
freebsd-dev/contrib/perl5/util.c

2880 lines
64 KiB
C
Raw Blame History

/* util.c
*
* Copyright (c) 1991-1997, 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
#ifndef SIG_ERR
# define SIG_ERR ((Sighandler_t) -1)
#endif
/* XXX If this causes problems, set i_unistd=undef in the hint file. */
#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
#ifdef I_SYS_WAIT
# include <sys/wait.h>
#endif
#define FLUSH
#ifdef LEAKTEST
static void xstat _((int));
long xcount[MAXXCOUNT];
long lastxcount[MAXXCOUNT];
long xycount[MAXXCOUNT][MAXYCOUNT];
long lastxycount[MAXXCOUNT][MAXYCOUNT];
#endif
#ifndef MYMALLOC
/* 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.
* XXX This advice seems to be widely ignored :-( --AD August 1996.
*/
Malloc_t
safemalloc(MEM_SIZE size)
{
Malloc_t ptr;
#ifdef HAS_64K_LIMIT
if (size > 0xffff) {
PerlIO_printf(PerlIO_stderr(), "Allocation too large: %lx\n", size) FLUSH;
my_exit(1);
}
#endif /* HAS_64K_LIMIT */
#ifdef DEBUGGING
if ((long)size < 0)
croak("panic: malloc");
#endif
ptr = PerlMem_malloc(size?size:1); /* malloc(0) is NASTY on our system */
#if !(defined(I286) || defined(atarist))
DEBUG_m(PerlIO_printf(Perl_debug_log, "0x%x: (%05d) malloc %ld bytes\n",ptr,PL_an++,(long)size));
#else
DEBUG_m(PerlIO_printf(Perl_debug_log, "0x%lx: (%05d) malloc %ld bytes\n",ptr,PL_an++,(long)size));
#endif
if (ptr != Nullch)
return ptr;
else if (PL_nomemok)
return Nullch;
else {
PerlIO_puts(PerlIO_stderr(),no_mem) FLUSH;
my_exit(1);
return Nullch;
}
/*NOTREACHED*/
}
/* paranoid version of realloc */
Malloc_t
saferealloc(Malloc_t where,MEM_SIZE size)
{
Malloc_t ptr;
#if !defined(STANDARD_C) && !defined(HAS_REALLOC_PROTOTYPE)
Malloc_t PerlMem_realloc();
#endif /* !defined(STANDARD_C) && !defined(HAS_REALLOC_PROTOTYPE) */
#ifdef HAS_64K_LIMIT
if (size > 0xffff) {
PerlIO_printf(PerlIO_stderr(),
"Reallocation too large: %lx\n", size) FLUSH;
my_exit(1);
}
#endif /* HAS_64K_LIMIT */
if (!size) {
safefree(where);
return NULL;
}
if (!where)
return safemalloc(size);
#ifdef DEBUGGING
if ((long)size < 0)
croak("panic: realloc");
#endif
ptr = PerlMem_realloc(where,size);
#if !(defined(I286) || defined(atarist))
DEBUG_m( {
PerlIO_printf(Perl_debug_log, "0x%x: (%05d) rfree\n",where,PL_an++);
PerlIO_printf(Perl_debug_log, "0x%x: (%05d) realloc %ld bytes\n",ptr,PL_an++,(long)size);
} )
#else
DEBUG_m( {
PerlIO_printf(Perl_debug_log, "0x%lx: (%05d) rfree\n",where,PL_an++);
PerlIO_printf(Perl_debug_log, "0x%lx: (%05d) realloc %ld bytes\n",ptr,PL_an++,(long)size);
} )
#endif
if (ptr != Nullch)
return ptr;
else if (PL_nomemok)
return Nullch;
else {
PerlIO_puts(PerlIO_stderr(),no_mem) FLUSH;
my_exit(1);
return Nullch;
}
/*NOTREACHED*/
}
/* safe version of free */
Free_t
safefree(Malloc_t where)
{
#if !(defined(I286) || defined(atarist))
DEBUG_m( PerlIO_printf(Perl_debug_log, "0x%x: (%05d) free\n",(char *) where,PL_an++));
#else
DEBUG_m( PerlIO_printf(Perl_debug_log, "0x%lx: (%05d) free\n",(char *) where,PL_an++));
#endif
if (where) {
/*SUPPRESS 701*/
PerlMem_free(where);
}
}
/* safe version of calloc */
Malloc_t
safecalloc(MEM_SIZE count, MEM_SIZE size)
{
Malloc_t ptr;
#ifdef HAS_64K_LIMIT
if (size * count > 0xffff) {
PerlIO_printf(PerlIO_stderr(),
"Allocation too large: %lx\n", size * count) FLUSH;
my_exit(1);
}
#endif /* HAS_64K_LIMIT */
#ifdef DEBUGGING
if ((long)size < 0 || (long)count < 0)
croak("panic: calloc");
#endif
size *= count;
ptr = PerlMem_malloc(size?size:1); /* malloc(0) is NASTY on our system */
#if !(defined(I286) || defined(atarist))
DEBUG_m(PerlIO_printf(Perl_debug_log, "0x%x: (%05d) calloc %ld x %ld bytes\n",ptr,PL_an++,(long)count,(long)size));
#else
DEBUG_m(PerlIO_printf(Perl_debug_log, "0x%lx: (%05d) calloc %ld x %ld bytes\n",ptr,PL_an++,(long)count,(long)size));
#endif
if (ptr != Nullch) {
memset((void*)ptr, 0, size);
return ptr;
}
else if (PL_nomemok)
return Nullch;
else {
PerlIO_puts(PerlIO_stderr(),no_mem) FLUSH;
my_exit(1);
return Nullch;
}
/*NOTREACHED*/
}
#endif /* !MYMALLOC */
#ifdef LEAKTEST
struct mem_test_strut {
union {
long type;
char c[2];
} u;
long size;
};
# define ALIGN sizeof(struct mem_test_strut)
# define sizeof_chunk(ch) (((struct mem_test_strut*) (ch))->size)
# define typeof_chunk(ch) \
(((struct mem_test_strut*) (ch))->u.c[0] + ((struct mem_test_strut*) (ch))->u.c[1]*100)
# define set_typeof_chunk(ch,t) \
(((struct mem_test_strut*) (ch))->u.c[0] = t % 100, ((struct mem_test_strut*) (ch))->u.c[1] = t / 100)
#define SIZE_TO_Y(size) ( (size) > MAXY_SIZE \
? MAXYCOUNT - 1 \
: ( (size) > 40 \
? ((size) - 1)/8 + 5 \
: ((size) - 1)/4))
Malloc_t
safexmalloc(I32 x, MEM_SIZE size)
{
register char* where = (char*)safemalloc(size + ALIGN);
xcount[x] += size;
xycount[x][SIZE_TO_Y(size)]++;
set_typeof_chunk(where, x);
sizeof_chunk(where) = size;
return (Malloc_t)(where + ALIGN);
}
Malloc_t
safexrealloc(Malloc_t wh, MEM_SIZE size)
{
char *where = (char*)wh;
if (!wh)
return safexmalloc(0,size);
{
MEM_SIZE old = sizeof_chunk(where - ALIGN);
int t = typeof_chunk(where - ALIGN);
register char* new = (char*)saferealloc(where - ALIGN, size + ALIGN);
xycount[t][SIZE_TO_Y(old)]--;
xycount[t][SIZE_TO_Y(size)]++;
xcount[t] += size - old;
sizeof_chunk(new) = size;
return (Malloc_t)(new + ALIGN);
}
}
void
safexfree(Malloc_t wh)
{
I32 x;
char *where = (char*)wh;
MEM_SIZE size;
if (!where)
return;
where -= ALIGN;
size = sizeof_chunk(where);
x = where[0] + 100 * where[1];
xcount[x] -= size;
xycount[x][SIZE_TO_Y(size)]--;
safefree(where);
}
Malloc_t
safexcalloc(I32 x,MEM_SIZE count, MEM_SIZE size)
{
register char * where = (char*)safexmalloc(x, size * count + ALIGN);
xcount[x] += size;
xycount[x][SIZE_TO_Y(size)]++;
memset((void*)(where + ALIGN), 0, size * count);
set_typeof_chunk(where, x);
sizeof_chunk(where) = size;
return (Malloc_t)(where + ALIGN);
}
static void
xstat(int flag)
{
register I32 i, j, total = 0;
I32 subtot[MAXYCOUNT];
for (j = 0; j < MAXYCOUNT; j++) {
subtot[j] = 0;
}
PerlIO_printf(PerlIO_stderr(), " Id subtot 4 8 12 16 20 24 28 32 36 40 48 56 64 72 80 80+\n", total);
for (i = 0; i < MAXXCOUNT; i++) {
total += xcount[i];
for (j = 0; j < MAXYCOUNT; j++) {
subtot[j] += xycount[i][j];
}
if (flag == 0
? xcount[i] /* Have something */
: (flag == 2
? xcount[i] != lastxcount[i] /* Changed */
: xcount[i] > lastxcount[i])) { /* Growed */
PerlIO_printf(PerlIO_stderr(),"%2d %02d %7ld ", i / 100, i % 100,
flag == 2 ? xcount[i] - lastxcount[i] : xcount[i]);
lastxcount[i] = xcount[i];
for (j = 0; j < MAXYCOUNT; j++) {
if ( flag == 0
? xycount[i][j] /* Have something */
: (flag == 2
? xycount[i][j] != lastxycount[i][j] /* Changed */
: xycount[i][j] > lastxycount[i][j])) { /* Growed */
PerlIO_printf(PerlIO_stderr(),"%3ld ",
flag == 2
? xycount[i][j] - lastxycount[i][j]
: xycount[i][j]);
lastxycount[i][j] = xycount[i][j];
} else {
PerlIO_printf(PerlIO_stderr(), " . ", xycount[i][j]);
}
}
PerlIO_printf(PerlIO_stderr(), "\n");
}
}
if (flag != 2) {
PerlIO_printf(PerlIO_stderr(), "Total %7ld ", total);
for (j = 0; j < MAXYCOUNT; j++) {
if (subtot[j]) {
PerlIO_printf(PerlIO_stderr(), "%3ld ", subtot[j]);
} else {
PerlIO_printf(PerlIO_stderr(), " . ");
}
}
PerlIO_printf(PerlIO_stderr(), "\n");
}
}
#endif /* LEAKTEST */
/* copy a string up to some (non-backslashed) delimiter, if any */
char *
delimcpy(register char *to, register char *toend, register char *from, register char *fromend, register int delim, I32 *retlen)
{
register I32 tolen;
for (tolen = 0; from < fromend; from++, tolen++) {
if (*from == '\\') {
if (from[1] == delim)
from++;
else {
if (to < toend)
*to++ = *from;
tolen++;
from++;
}
}
else if (*from == delim)
break;
if (to < toend)
*to++ = *from;
}
if (to < toend)
*to = '\0';
*retlen = tolen;
return from;
}
/* return ptr to little string in big string, NULL if not found */
/* This routine was donated by Corey Satten. */
char *
instr(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(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(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;
}
/*
* Set up for a new ctype locale.
*/
void
perl_new_ctype(char *newctype)
{
#ifdef USE_LOCALE_CTYPE
int i;
for (i = 0; i < 256; i++) {
if (isUPPER_LC(i))
fold_locale[i] = toLOWER_LC(i);
else if (isLOWER_LC(i))
fold_locale[i] = toUPPER_LC(i);
else
fold_locale[i] = i;
}
#endif /* USE_LOCALE_CTYPE */
}
/*
* Set up for a new collation locale.
*/
void
perl_new_collate(char *newcoll)
{
#ifdef USE_LOCALE_COLLATE
if (! newcoll) {
if (PL_collation_name) {
++PL_collation_ix;
Safefree(PL_collation_name);
PL_collation_name = NULL;
PL_collation_standard = TRUE;
PL_collxfrm_base = 0;
PL_collxfrm_mult = 2;
}
return;
}
if (! PL_collation_name || strNE(PL_collation_name, newcoll)) {
++PL_collation_ix;
Safefree(PL_collation_name);
PL_collation_name = savepv(newcoll);
PL_collation_standard = (strEQ(newcoll, "C") || strEQ(newcoll, "POSIX"));
{
/* 2: at most so many chars ('a', 'b'). */
/* 50: surely no system expands a char more. */
#define XFRMBUFSIZE (2 * 50)
char xbuf[XFRMBUFSIZE];
Size_t fa = strxfrm(xbuf, "a", XFRMBUFSIZE);
Size_t fb = strxfrm(xbuf, "ab", XFRMBUFSIZE);
SSize_t mult = fb - fa;
if (mult < 1)
croak("strxfrm() gets absurd");
PL_collxfrm_base = (fa > mult) ? (fa - mult) : 0;
PL_collxfrm_mult = mult;
}
}
#endif /* USE_LOCALE_COLLATE */
}
/*
* Set up for a new numeric locale.
*/
void
perl_new_numeric(char *newnum)
{
#ifdef USE_LOCALE_NUMERIC
if (! newnum) {
if (PL_numeric_name) {
Safefree(PL_numeric_name);
PL_numeric_name = NULL;
PL_numeric_standard = TRUE;
PL_numeric_local = TRUE;
}
return;
}
if (! PL_numeric_name || strNE(PL_numeric_name, newnum)) {
Safefree(PL_numeric_name);
PL_numeric_name = savepv(newnum);
PL_numeric_standard = (strEQ(newnum, "C") || strEQ(newnum, "POSIX"));
PL_numeric_local = TRUE;
}
#endif /* USE_LOCALE_NUMERIC */
}
void
perl_set_numeric_standard(void)
{
#ifdef USE_LOCALE_NUMERIC
if (! PL_numeric_standard) {
setlocale(LC_NUMERIC, "C");
PL_numeric_standard = TRUE;
PL_numeric_local = FALSE;
}
#endif /* USE_LOCALE_NUMERIC */
}
void
perl_set_numeric_local(void)
{
#ifdef USE_LOCALE_NUMERIC
if (! PL_numeric_local) {
setlocale(LC_NUMERIC, PL_numeric_name);
PL_numeric_standard = FALSE;
PL_numeric_local = TRUE;
}
#endif /* USE_LOCALE_NUMERIC */
}
/*
* Initialize locale awareness.
*/
int
perl_init_i18nl10n(int printwarn)
{
int ok = 1;
/* returns
* 1 = set ok or not applicable,
* 0 = fallback to C locale,
* -1 = fallback to C locale failed
*/
#ifdef USE_LOCALE
#ifdef USE_LOCALE_CTYPE
char *curctype = NULL;
#endif /* USE_LOCALE_CTYPE */
#ifdef USE_LOCALE_COLLATE
char *curcoll = NULL;
#endif /* USE_LOCALE_COLLATE */
#ifdef USE_LOCALE_NUMERIC
char *curnum = NULL;
#endif /* USE_LOCALE_NUMERIC */
char *lc_all = PerlEnv_getenv("LC_ALL");
char *lang = PerlEnv_getenv("LANG");
bool setlocale_failure = FALSE;
#ifdef LOCALE_ENVIRON_REQUIRED
/*
* Ultrix setlocale(..., "") fails if there are no environment
* variables from which to get a locale name.
*/
bool done = FALSE;
#ifdef LC_ALL
if (lang) {
if (setlocale(LC_ALL, ""))
done = TRUE;
else
setlocale_failure = TRUE;
}
if (!setlocale_failure)
#endif /* LC_ALL */
{
#ifdef USE_LOCALE_CTYPE
if (! (curctype = setlocale(LC_CTYPE,
(!done && (lang || PerlEnv_getenv("LC_CTYPE")))
? "" : Nullch)))
setlocale_failure = TRUE;
#endif /* USE_LOCALE_CTYPE */
#ifdef USE_LOCALE_COLLATE
if (! (curcoll = setlocale(LC_COLLATE,
(!done && (lang || PerlEnv_getenv("LC_COLLATE")))
? "" : Nullch)))
setlocale_failure = TRUE;
#endif /* USE_LOCALE_COLLATE */
#ifdef USE_LOCALE_NUMERIC
if (! (curnum = setlocale(LC_NUMERIC,
(!done && (lang || PerlEnv_getenv("LC_NUMERIC")))
? "" : Nullch)))
setlocale_failure = TRUE;
#endif /* USE_LOCALE_NUMERIC */
}
#else /* !LOCALE_ENVIRON_REQUIRED */
#ifdef LC_ALL
if (! setlocale(LC_ALL, ""))
setlocale_failure = TRUE;
else {
#ifdef USE_LOCALE_CTYPE
curctype = setlocale(LC_CTYPE, Nullch);
#endif /* USE_LOCALE_CTYPE */
#ifdef USE_LOCALE_COLLATE
curcoll = setlocale(LC_COLLATE, Nullch);
#endif /* USE_LOCALE_COLLATE */
#ifdef USE_LOCALE_NUMERIC
curnum = setlocale(LC_NUMERIC, Nullch);
#endif /* USE_LOCALE_NUMERIC */
}
#else /* !LC_ALL */
#ifdef USE_LOCALE_CTYPE
if (! (curctype = setlocale(LC_CTYPE, "")))
setlocale_failure = TRUE;
#endif /* USE_LOCALE_CTYPE */
#ifdef USE_LOCALE_COLLATE
if (! (curcoll = setlocale(LC_COLLATE, "")))
setlocale_failure = TRUE;
#endif /* USE_LOCALE_COLLATE */
#ifdef USE_LOCALE_NUMERIC
if (! (curnum = setlocale(LC_NUMERIC, "")))
setlocale_failure = TRUE;
#endif /* USE_LOCALE_NUMERIC */
#endif /* LC_ALL */
#endif /* !LOCALE_ENVIRON_REQUIRED */
if (setlocale_failure) {
char *p;
bool locwarn = (printwarn > 1 ||
printwarn &&
(!(p = PerlEnv_getenv("PERL_BADLANG")) || atoi(p)));
if (locwarn) {
#ifdef LC_ALL
PerlIO_printf(PerlIO_stderr(),
"perl: warning: Setting locale failed.\n");
#else /* !LC_ALL */
PerlIO_printf(PerlIO_stderr(),
"perl: warning: Setting locale failed for the categories:\n\t");
#ifdef USE_LOCALE_CTYPE
if (! curctype)
PerlIO_printf(PerlIO_stderr(), "LC_CTYPE ");
#endif /* USE_LOCALE_CTYPE */
#ifdef USE_LOCALE_COLLATE
if (! curcoll)
PerlIO_printf(PerlIO_stderr(), "LC_COLLATE ");
#endif /* USE_LOCALE_COLLATE */
#ifdef USE_LOCALE_NUMERIC
if (! curnum)
PerlIO_printf(PerlIO_stderr(), "LC_NUMERIC ");
#endif /* USE_LOCALE_NUMERIC */
PerlIO_printf(PerlIO_stderr(), "\n");
#endif /* LC_ALL */
PerlIO_printf(PerlIO_stderr(),
"perl: warning: Please check that your locale settings:\n");
PerlIO_printf(PerlIO_stderr(),
"\tLC_ALL = %c%s%c,\n",
lc_all ? '"' : '(',
lc_all ? lc_all : "unset",
lc_all ? '"' : ')');
{
char **e;
for (e = environ; *e; e++) {
if (strnEQ(*e, "LC_", 3)
&& strnNE(*e, "LC_ALL=", 7)
&& (p = strchr(*e, '=')))
PerlIO_printf(PerlIO_stderr(), "\t%.*s = \"%s\",\n",
(int)(p - *e), *e, p + 1);
}
}
PerlIO_printf(PerlIO_stderr(),
"\tLANG = %c%s%c\n",
lang ? '"' : '(',
lang ? lang : "unset",
lang ? '"' : ')');
PerlIO_printf(PerlIO_stderr(),
" are supported and installed on your system.\n");
}
#ifdef LC_ALL
if (setlocale(LC_ALL, "C")) {
if (locwarn)
PerlIO_printf(PerlIO_stderr(),
"perl: warning: Falling back to the standard locale (\"C\").\n");
ok = 0;
}
else {
if (locwarn)
PerlIO_printf(PerlIO_stderr(),
"perl: warning: Failed to fall back to the standard locale (\"C\").\n");
ok = -1;
}
#else /* ! LC_ALL */
if (0
#ifdef USE_LOCALE_CTYPE
|| !(curctype || setlocale(LC_CTYPE, "C"))
#endif /* USE_LOCALE_CTYPE */
#ifdef USE_LOCALE_COLLATE
|| !(curcoll || setlocale(LC_COLLATE, "C"))
#endif /* USE_LOCALE_COLLATE */
#ifdef USE_LOCALE_NUMERIC
|| !(curnum || setlocale(LC_NUMERIC, "C"))
#endif /* USE_LOCALE_NUMERIC */
)
{
if (locwarn)
PerlIO_printf(PerlIO_stderr(),
"perl: warning: Cannot fall back to the standard locale (\"C\").\n");
ok = -1;
}
#endif /* ! LC_ALL */
#ifdef USE_LOCALE_CTYPE
curctype = setlocale(LC_CTYPE, Nullch);
#endif /* USE_LOCALE_CTYPE */
#ifdef USE_LOCALE_COLLATE
curcoll = setlocale(LC_COLLATE, Nullch);
#endif /* USE_LOCALE_COLLATE */
#ifdef USE_LOCALE_NUMERIC
curnum = setlocale(LC_NUMERIC, Nullch);
#endif /* USE_LOCALE_NUMERIC */
}
#ifdef USE_LOCALE_CTYPE
perl_new_ctype(curctype);
#endif /* USE_LOCALE_CTYPE */
#ifdef USE_LOCALE_COLLATE
perl_new_collate(curcoll);
#endif /* USE_LOCALE_COLLATE */
#ifdef USE_LOCALE_NUMERIC
perl_new_numeric(curnum);
#endif /* USE_LOCALE_NUMERIC */
#endif /* USE_LOCALE */
return ok;
}
/* Backwards compatibility. */
int
perl_init_i18nl14n(int printwarn)
{
return perl_init_i18nl10n(printwarn);
}
#ifdef USE_LOCALE_COLLATE
/*
* mem_collxfrm() is a bit like strxfrm() but with two important
* differences. First, it handles embedded NULs. Second, it allocates
* a bit more memory than needed for the transformed data itself.
* The real transformed data begins at offset sizeof(collationix).
* Please see sv_collxfrm() to see how this is used.
*/
char *
mem_collxfrm(const char *s, STRLEN len, STRLEN *xlen)
{
char *xbuf;
STRLEN xAlloc, xin, xout; /* xalloc is a reserved word in VC */
/* the first sizeof(collationix) bytes are used by sv_collxfrm(). */
/* the +1 is for the terminating NUL. */
xAlloc = sizeof(PL_collation_ix) + PL_collxfrm_base + (PL_collxfrm_mult * len) + 1;
New(171, xbuf, xAlloc, char);
if (! xbuf)
goto bad;
*(U32*)xbuf = PL_collation_ix;
xout = sizeof(PL_collation_ix);
for (xin = 0; xin < len; ) {
SSize_t xused;
for (;;) {
xused = strxfrm(xbuf + xout, s + xin, xAlloc - xout);
if (xused == -1)
goto bad;
if (xused < xAlloc - xout)
break;
xAlloc = (2 * xAlloc) + 1;
Renew(xbuf, xAlloc, char);
if (! xbuf)
goto bad;
}
xin += strlen(s + xin) + 1;
xout += xused;
/* Embedded NULs are understood but silently skipped
* because they make no sense in locale collation. */
}
xbuf[xout] = '\0';
*xlen = xout - sizeof(PL_collation_ix);
return xbuf;
bad:
Safefree(xbuf);
*xlen = 0;
return NULL;
}
#endif /* USE_LOCALE_COLLATE */
void
fbm_compile(SV *sv, U32 flags /* not used yet */)
{
register unsigned char *s;
register unsigned char *table;
register U32 i;
register U32 len = SvCUR(sv);
I32 rarest = 0;
U32 frequency = 256;
sv_upgrade(sv, SVt_PVBM);
if (len > 255 || len == 0) /* TAIL might be on on a zero-length string. */
return; /* can't have offsets that big */
if (len > 2) {
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)
table[*s] = i;
s--,i++;
}
}
sv_magic(sv, Nullsv, 'B', Nullch, 0); /* deep magic */
SvVALID_on(sv);
s = (unsigned char*)(SvPVX(sv)); /* deeper magic */
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(PerlIO_printf(Perl_debug_log, "rarest char %c at %d\n",BmRARE(sv),BmPREVIOUS(sv)));
}
char *
fbm_instr(unsigned char *big, register unsigned char *bigend, SV *littlestr, U32 flags)
{
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) {
if (SvTAIL(littlestr)) { /* Can be only 0-len constant
substr => we can ignore SvVALID */
if (PL_multiline) {
char *t = "\n";
if ((s = (unsigned char*)ninstr((char*)big, (char*)bigend,
t, t + len))) {
return (char*)s;
}
}
if (bigend > big && bigend[-1] == '\n')
return (char *)(bigend - 1);
else
return (char *) bigend;
}
return (char*)big;
}
return ninstr((char*)big,(char*)bigend, l, l + len);
}
littlelen = SvCUR(littlestr);
if (SvTAIL(littlestr) && !PL_multiline) { /* tail anchored? */
if (littlelen > bigend - big)
return Nullch;
little = (unsigned char*)SvPVX(littlestr);
s = bigend - littlelen;
if (s > big
&& bigend[-1] == '\n'
&& s[-1] == *little && memEQ((char*)s - 1,(char*)little,littlelen))
return (char*)s - 1; /* how sweet it is */
else if (*s == *little && memEQ((char*)s,(char*)little,littlelen))
return (char*)s; /* how sweet it is */
return Nullch;
}
if (littlelen <= 2) {
unsigned char c1 = (unsigned char)SvPVX(littlestr)[0];
unsigned char c2 = (unsigned char)SvPVX(littlestr)[1];
/* This may do extra comparisons if littlelen == 2, but this
should be hidden in the noise since we do less indirection. */
s = big;
bigend -= littlelen;
while (s <= bigend) {
if (s[0] == c1
&& (littlelen == 1 || s[1] == c2)
&& (!SvTAIL(littlestr)
|| s == bigend
|| s[littlelen] == '\n')) /* Automatically multiline */
{
return (char*)s;
}
s++;
}
return Nullch;
}
table = (unsigned char*)(SvPVX(littlestr) + littlelen + 1);
if (--littlelen >= bigend - big)
return Nullch;
s = big + littlelen;
oldlittle = little = table - 2;
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;
differ:
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;
}
if (SvTAIL(littlestr) /* automatically multiline */
&& olds + 1 != bigend
&& olds[1] != '\n')
goto differ;
return (char *)s;
}
}
return Nullch;
}
/* start_shift, end_shift are positive quantities which give offsets
of ends of some substring of bigstr.
If `last' we want the last occurence.
old_posp is the way of communication between consequent calls if
the next call needs to find the .
The initial *old_posp should be -1.
Note that we do not take into account SvTAIL, so it may give wrong
positives if _ALL flag is set.
*/
char *
screaminstr(SV *bigstr, SV *littlestr, I32 start_shift, I32 end_shift, I32 *old_posp, I32 last)
{
dTHR;
register unsigned char *s, *x;
register unsigned char *big;
register I32 pos;
register I32 previous;
register I32 first;
register unsigned char *little;
register I32 stop_pos;
register unsigned char *littleend;
I32 found = 0;
if (*old_posp == -1
? (pos = PL_screamfirst[BmRARE(littlestr)]) < 0
: (((pos = *old_posp), pos += PL_screamnext[pos]) == 0))
return Nullch;
little = (unsigned char *)(SvPVX(littlestr));
littleend = little + SvCUR(littlestr);
first = *little++;
/* The value of pos we can start at: */
previous = BmPREVIOUS(littlestr);
big = (unsigned char *)(SvPVX(bigstr));
/* The value of pos we can stop at: */
stop_pos = SvCUR(bigstr) - end_shift - (SvCUR(littlestr) - 1 - previous);
if (previous + start_shift > stop_pos) return Nullch;
while (pos < previous + start_shift) {
if (!(pos += PL_screamnext[pos]))
return Nullch;
}
#ifdef POINTERRIGOR
do {
if (pos >= stop_pos) break;
if (big[pos-previous] != first)
continue;
for (x=big+pos+1-previous,s=little; s < littleend; /**/ ) {
if (*s++ != *x++) {
s--;
break;
}
}
if (s == littleend) {
*old_posp = pos;
if (!last) return (char *)(big+pos-previous);
found = 1;
}
} while ( pos += PL_screamnext[pos] );
return (last && found) ? (char *)(big+(*old_posp)-previous) : Nullch;
#else /* !POINTERRIGOR */
big -= previous;
do {
if (pos >= stop_pos) break;
if (big[pos] != first)
continue;
for (x=big+pos+1,s=little; s < littleend; /**/ ) {
if (*s++ != *x++) {
s--;
break;
}
}
if (s == littleend) {
*old_posp = pos;
if (!last) return (char *)(big+pos);
found = 1;
}
} while ( pos += PL_screamnext[pos] );
return (last && found) ? (char *)(big+(*old_posp)) : Nullch;
#endif /* POINTERRIGOR */
}
I32
ibcmp(char *s1, char *s2, register I32 len)
{
register U8 *a = (U8 *)s1;
register U8 *b = (U8 *)s2;
while (len--) {
if (*a != *b && *a != fold[*b])
return 1;
a++,b++;
}
return 0;
}
I32
ibcmp_locale(char *s1, char *s2, register I32 len)
{
register U8 *a = (U8 *)s1;
register U8 *b = (U8 *)s2;
while (len--) {
if (*a != *b && *a != fold_locale[*b])
return 1;
a++,b++;
}
return 0;
}
/* copy a string to a safe spot */
char *
savepv(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(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;
}
/* the SV for form() and mess() is not kept in an arena */
STATIC SV *
mess_alloc(void)
{
SV *sv;
XPVMG *any;
/* Create as PVMG now, to avoid any upgrading later */
New(905, sv, 1, SV);
Newz(905, any, 1, XPVMG);
SvFLAGS(sv) = SVt_PVMG;
SvANY(sv) = (void*)any;
SvREFCNT(sv) = 1 << 30; /* practically infinite */
return sv;
}
char *
form(const char* pat, ...)
{
va_list args;
va_start(args, pat);
if (!PL_mess_sv)
PL_mess_sv = mess_alloc();
sv_vsetpvfn(PL_mess_sv, pat, strlen(pat), &args, Null(SV**), 0, Null(bool*));
va_end(args);
return SvPVX(PL_mess_sv);
}
char *
mess(const char *pat, va_list *args)
{
SV *sv;
static char dgd[] = " during global destruction.\n";
if (!PL_mess_sv)
PL_mess_sv = mess_alloc();
sv = PL_mess_sv;
sv_vsetpvfn(sv, pat, strlen(pat), args, Null(SV**), 0, Null(bool*));
if (!SvCUR(sv) || *(SvEND(sv) - 1) != '\n') {
dTHR;
if (PL_dirty)
sv_catpv(sv, dgd);
else {
if (PL_curcop->cop_line)
sv_catpvf(sv, " at %_ line %ld",
GvSV(PL_curcop->cop_filegv), (long)PL_curcop->cop_line);
if (GvIO(PL_last_in_gv) && IoLINES(GvIOp(PL_last_in_gv))) {
bool line_mode = (RsSIMPLE(PL_rs) &&
SvLEN(PL_rs) == 1 && *SvPVX(PL_rs) == '\n');
sv_catpvf(sv, ", <%s> %s %ld",
PL_last_in_gv == PL_argvgv ? "" : GvNAME(PL_last_in_gv),
line_mode ? "line" : "chunk",
(long)IoLINES(GvIOp(PL_last_in_gv)));
}
sv_catpv(sv, ".\n");
}
}
return SvPVX(sv);
}
OP *
die(const char* pat, ...)
{
dTHR;
va_list args;
char *message;
int was_in_eval = PL_in_eval;
HV *stash;
GV *gv;
CV *cv;
DEBUG_S(PerlIO_printf(PerlIO_stderr(),
"%p: die: curstack = %p, mainstack = %p\n",
thr, PL_curstack, PL_mainstack));
va_start(args, pat);
message = pat ? mess(pat, &args) : Nullch;
va_end(args);
DEBUG_S(PerlIO_printf(PerlIO_stderr(),
"%p: die: message = %s\ndiehook = %p\n",
thr, message, PL_diehook));
if (PL_diehook) {
/* sv_2cv might call croak() */
SV *olddiehook = PL_diehook;
ENTER;
SAVESPTR(PL_diehook);
PL_diehook = Nullsv;
cv = sv_2cv(olddiehook, &stash, &gv, 0);
LEAVE;
if (cv && !CvDEPTH(cv) && (CvROOT(cv) || CvXSUB(cv))) {
dSP;
SV *msg;
ENTER;
if(message) {
msg = newSVpv(message, 0);
SvREADONLY_on(msg);
SAVEFREESV(msg);
}
else {
msg = ERRSV;
}
PUSHSTACKi(PERLSI_DIEHOOK);
PUSHMARK(SP);
XPUSHs(msg);
PUTBACK;
perl_call_sv((SV*)cv, G_DISCARD);
POPSTACK;
LEAVE;
}
}
PL_restartop = die_where(message);
DEBUG_S(PerlIO_printf(PerlIO_stderr(),
"%p: die: restartop = %p, was_in_eval = %d, top_env = %p\n",
thr, PL_restartop, was_in_eval, PL_top_env));
if ((!PL_restartop && was_in_eval) || PL_top_env->je_prev)
JMPENV_JUMP(3);
return PL_restartop;
}
void
croak(const char* pat, ...)
{
dTHR;
va_list args;
char *message;
HV *stash;
GV *gv;
CV *cv;
va_start(args, pat);
message = mess(pat, &args);
va_end(args);
DEBUG_S(PerlIO_printf(PerlIO_stderr(), "croak: 0x%lx %s", (unsigned long) thr, message));
if (PL_diehook) {
/* sv_2cv might call croak() */
SV *olddiehook = PL_diehook;
ENTER;
SAVESPTR(PL_diehook);
PL_diehook = Nullsv;
cv = sv_2cv(olddiehook, &stash, &gv, 0);
LEAVE;
if (cv && !CvDEPTH(cv) && (CvROOT(cv) || CvXSUB(cv))) {
dSP;
SV *msg;
ENTER;
msg = newSVpv(message, 0);
SvREADONLY_on(msg);
SAVEFREESV(msg);
PUSHSTACKi(PERLSI_DIEHOOK);
PUSHMARK(SP);
XPUSHs(msg);
PUTBACK;
perl_call_sv((SV*)cv, G_DISCARD);
POPSTACK;
LEAVE;
}
}
if (PL_in_eval) {
PL_restartop = die_where(message);
JMPENV_JUMP(3);
}
PerlIO_puts(PerlIO_stderr(),message);
(void)PerlIO_flush(PerlIO_stderr());
my_failure_exit();
}
void
warn(const char* pat,...)
{
va_list args;
char *message;
HV *stash;
GV *gv;
CV *cv;
va_start(args, pat);
message = mess(pat, &args);
va_end(args);
if (PL_warnhook) {
/* sv_2cv might call warn() */
dTHR;
SV *oldwarnhook = PL_warnhook;
ENTER;
SAVESPTR(PL_warnhook);
PL_warnhook = Nullsv;
cv = sv_2cv(oldwarnhook, &stash, &gv, 0);
LEAVE;
if (cv && !CvDEPTH(cv) && (CvROOT(cv) || CvXSUB(cv))) {
dSP;
SV *msg;
ENTER;
msg = newSVpv(message, 0);
SvREADONLY_on(msg);
SAVEFREESV(msg);
PUSHSTACKi(PERLSI_WARNHOOK);
PUSHMARK(SP);
XPUSHs(msg);
PUTBACK;
perl_call_sv((SV*)cv, G_DISCARD);
POPSTACK;
LEAVE;
return;
}
}
PerlIO_puts(PerlIO_stderr(),message);
#ifdef LEAKTEST
DEBUG_L(*message == '!'
? (xstat(message[1]=='!'
? (message[2]=='!' ? 2 : 1)
: 0)
, 0)
: 0);
#endif
(void)PerlIO_flush(PerlIO_stderr());
}
#ifndef VMS /* VMS' my_setenv() is in VMS.c */
#ifndef WIN32
void
my_setenv(char *nam, char *val)
{
register I32 i=setenv_getix(nam); /* where does it go? */
if (environ == PL_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) {
Safefree(environ[i]);
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 */
}
#else /* if WIN32 */
void
my_setenv(char *nam,char *val)
{
#ifdef USE_WIN32_RTL_ENV
register char *envstr;
STRLEN namlen = strlen(nam);
STRLEN vallen;
char *oldstr = environ[setenv_getix(nam)];
/* putenv() has totally broken semantics in both the Borland
* and Microsoft CRTLs. They either store the passed pointer in
* the environment without making a copy, or make a copy and don't
* free it. And on top of that, they dont free() old entries that
* are being replaced/deleted. This means the caller must
* free any old entries somehow, or we end up with a memory
* leak every time my_setenv() is called. One might think
* one could directly manipulate environ[], like the UNIX code
* above, but direct changes to environ are not allowed when
* calling putenv(), since the RTLs maintain an internal
* *copy* of environ[]. Bad, bad, *bad* stink.
* GSAR 97-06-07
*/
if (!val) {
if (!oldstr)
return;
val = "";
vallen = 0;
}
else
vallen = strlen(val);
New(904, envstr, namlen + vallen + 3, char);
(void)sprintf(envstr,"%s=%s",nam,val);
(void)PerlEnv_putenv(envstr);
if (oldstr)
Safefree(oldstr);
#ifdef _MSC_VER
Safefree(envstr); /* MSVCRT leaks without this */
#endif
#else /* !USE_WIN32_RTL_ENV */
/* The sane way to deal with the environment.
* Has these advantages over putenv() & co.:
* * enables us to store a truly empty value in the
* environment (like in UNIX).
* * we don't have to deal with RTL globals, bugs and leaks.
* * Much faster.
* Why you may want to enable USE_WIN32_RTL_ENV:
* * environ[] and RTL functions will not reflect changes,
* which might be an issue if extensions want to access
* the env. via RTL. This cuts both ways, since RTL will
* not see changes made by extensions that call the Win32
* functions directly, either.
* GSAR 97-06-07
*/
SetEnvironmentVariable(nam,val);
#endif
}
#endif /* WIN32 */
I32
setenv_getix(char *nam)
{
register I32 i, len = strlen(nam);
for (i = 0; environ[i]; i++) {
if (
#ifdef WIN32
strnicmp(environ[i],nam,len) == 0
#else
strnEQ(environ[i],nam,len)
#endif
&& environ[i][len] == '=')
break; /* strnEQ must come first to avoid */
} /* potential SEGV's */
return i;
}
#endif /* !VMS */
#ifdef UNLINK_ALL_VERSIONS
I32
unlnk(f) /* unlink all versions of a file */
char *f;
{
I32 i;
for (i = 0; PerlLIO_unlink(f) >= 0; i++) ;
return i ? 0 : -1;
}
#endif
#if !defined(HAS_BCOPY) || !defined(HAS_SAFE_BCOPY)
char *
my_bcopy(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
#ifndef HAS_MEMSET
void *
my_memset(loc,ch,len)
register char *loc;
register I32 ch;
register I32 len;
{
char *retval = loc;
while (len--)
*loc++ = ch;
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
#if !defined(HAS_MEMCMP) || !defined(HAS_SANE_MEMCMP)
I32
my_memcmp(s1,s2,len)
char *s1;
char *s2;
register I32 len;
{
register U8 *a = (U8 *)s1;
register U8 *b = (U8 *)s2;
register I32 tmp;
while (len--) {
if (tmp = *a++ - *b++)
return tmp;
}
return 0;
}
#endif /* !HAS_MEMCMP || !HAS_SANE_MEMCMP */
#ifndef HAS_VPRINTF
#ifdef USE_CHAR_VSPRINTF
char *
#else
int
#endif
vsprintf(dest, pat, args)
char *dest;
const char *pat;
char *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
}
#endif /* HAS_VPRINTF */
#ifdef MYSWAP
#if BYTEORDER != 0x4321
short
my_swap(short s)
{
#if (BYTEORDER & 1) == 0
short result;
result = ((s & 255) << 8) + ((s >> 8) & 255);
return result;
#else
return s;
#endif
}
long
my_htonl(long l)
{
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
my_ntohl(long l)
{
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
/* VMS' my_popen() is in VMS.c, same with OS/2. */
#if (!defined(DOSISH) || defined(HAS_FORK) || defined(AMIGAOS)) && !defined(VMS)
PerlIO *
my_popen(char *cmd, char *mode)
{
int p[2];
register I32 This, that;
register I32 pid;
SV *sv;
I32 doexec = strNE(cmd,"-");
#ifdef OS2
if (doexec) {
return my_syspopen(cmd,mode);
}
#endif
This = (*mode == 'w');
that = !This;
if (doexec && PL_tainting) {
taint_env();
taint_proper("Insecure %s%s", "EXEC");
}
if (PerlProc_pipe(p) < 0)
return Nullfp;
while ((pid = (doexec?vfork():fork())) < 0) {
if (errno != EAGAIN) {
PerlLIO_close(p[This]);
if (!doexec)
croak("Can't fork");
return Nullfp;
}
sleep(5);
}
if (pid == 0) {
GV* tmpgv;
#undef THIS
#undef THAT
#define THIS that
#define THAT This
PerlLIO_close(p[THAT]);
if (p[THIS] != (*mode == 'r')) {
PerlLIO_dup2(p[THIS], *mode == 'r');
PerlLIO_close(p[THIS]);
}
if (doexec) {
#if !defined(HAS_FCNTL) || !defined(F_SETFD)
int fd;
#ifndef NOFILE
#define NOFILE 20
#endif
for (fd = PL_maxsysfd + 1; fd < NOFILE; fd++)
PerlLIO_close(fd);
#endif
do_exec(cmd); /* may or may not use the shell */
PerlProc__exit(1);
}
/*SUPPRESS 560*/
if (tmpgv = gv_fetchpv("$",TRUE, SVt_PV))
sv_setiv(GvSV(tmpgv), (IV)getpid());
PL_forkprocess = 0;
hv_clear(PL_pidstatus); /* we have no children */
return Nullfp;
#undef THIS
#undef THAT
}
do_execfree(); /* free any memory malloced by child on vfork */
PerlLIO_close(p[that]);
if (p[that] < p[This]) {
PerlLIO_dup2(p[This], p[that]);
PerlLIO_close(p[This]);
p[This] = p[that];
}
sv = *av_fetch(PL_fdpid,p[This],TRUE);
(void)SvUPGRADE(sv,SVt_IV);
SvIVX(sv) = pid;
PL_forkprocess = pid;
return PerlIO_fdopen(p[This], mode);
}
#else
#if defined(atarist) || defined(DJGPP)
FILE *popen();
PerlIO *
my_popen(cmd,mode)
char *cmd;
char *mode;
{
/* Needs work for PerlIO ! */
/* used 0 for 2nd parameter to PerlIO-exportFILE; apparently not used */
return popen(PerlIO_exportFILE(cmd, 0), mode);
}
#endif
#endif /* !DOSISH */
#ifdef DUMP_FDS
void
dump_fds(char *s)
{
int fd;
struct stat tmpstatbuf;
PerlIO_printf(PerlIO_stderr(),"%s", s);
for (fd = 0; fd < 32; fd++) {
if (PerlLIO_fstat(fd,&tmpstatbuf) >= 0)
PerlIO_printf(PerlIO_stderr()," %d",fd);
}
PerlIO_printf(PerlIO_stderr(),"\n");
}
#endif /* DUMP_FDS */
#ifndef HAS_DUP2
int
dup2(oldfd,newfd)
int oldfd;
int newfd;
{
#if defined(HAS_FCNTL) && defined(F_DUPFD)
if (oldfd == newfd)
return oldfd;
PerlLIO_close(newfd);
return fcntl(oldfd, F_DUPFD, newfd);
#else
#define DUP2_MAX_FDS 256
int fdtmp[DUP2_MAX_FDS];
I32 fdx = 0;
int fd;
if (oldfd == newfd)
return oldfd;
PerlLIO_close(newfd);
/* good enough for low fd's... */
while ((fd = PerlLIO_dup(oldfd)) != newfd && fd >= 0) {
if (fdx >= DUP2_MAX_FDS) {
PerlLIO_close(fd);
fd = -1;
break;
}
fdtmp[fdx++] = fd;
}
while (fdx > 0)
PerlLIO_close(fdtmp[--fdx]);
return fd;
#endif
}
#endif
#ifdef HAS_SIGACTION
Sighandler_t
rsignal(int signo, Sighandler_t handler)
{
struct sigaction act, oact;
act.sa_handler = handler;
sigemptyset(&act.sa_mask);
act.sa_flags = 0;
#ifdef SA_RESTART
act.sa_flags |= SA_RESTART; /* SVR4, 4.3+BSD */
#endif
#ifdef SA_NOCLDWAIT
if (signo == SIGCHLD && handler == (Sighandler_t)SIG_IGN)
act.sa_flags |= SA_NOCLDWAIT;
#endif
if (sigaction(signo, &act, &oact) == -1)
return SIG_ERR;
else
return oact.sa_handler;
}
Sighandler_t
rsignal_state(int signo)
{
struct sigaction oact;
if (sigaction(signo, (struct sigaction *)NULL, &oact) == -1)
return SIG_ERR;
else
return oact.sa_handler;
}
int
rsignal_save(int signo, Sighandler_t handler, Sigsave_t *save)
{
struct sigaction act;
act.sa_handler = handler;
sigemptyset(&act.sa_mask);
act.sa_flags = 0;
#ifdef SA_RESTART
act.sa_flags |= SA_RESTART; /* SVR4, 4.3+BSD */
#endif
#ifdef SA_NOCLDWAIT
if (signo == SIGCHLD && handler == (Sighandler_t)SIG_IGN)
act.sa_flags |= SA_NOCLDWAIT;
#endif
return sigaction(signo, &act, save);
}
int
rsignal_restore(int signo, Sigsave_t *save)
{
return sigaction(signo, save, (struct sigaction *)NULL);
}
#else /* !HAS_SIGACTION */
Sighandler_t
rsignal(int signo, Sighandler_t handler)
{
return PerlProc_signal(signo, handler);
}
static int sig_trapped;
static
Signal_t
sig_trap(int signo)
{
sig_trapped++;
}
Sighandler_t
rsignal_state(int signo)
{
Sighandler_t oldsig;
sig_trapped = 0;
oldsig = PerlProc_signal(signo, sig_trap);
PerlProc_signal(signo, oldsig);
if (sig_trapped)
PerlProc_kill(getpid(), signo);
return oldsig;
}
int
rsignal_save(int signo, Sighandler_t handler, Sigsave_t *save)
{
*save = PerlProc_signal(signo, handler);
return (*save == SIG_ERR) ? -1 : 0;
}
int
rsignal_restore(int signo, Sigsave_t *save)
{
return (PerlProc_signal(signo, *save) == SIG_ERR) ? -1 : 0;
}
#endif /* !HAS_SIGACTION */
/* VMS' my_pclose() is in VMS.c; same with OS/2 */
#if (!defined(DOSISH) || defined(HAS_FORK) || defined(AMIGAOS)) && !defined(VMS)
I32
my_pclose(PerlIO *ptr)
{
Sigsave_t hstat, istat, qstat;
int status;
SV **svp;
int pid;
int pid2;
bool close_failed;
int saved_errno;
#ifdef VMS
int saved_vaxc_errno;
#endif
#ifdef WIN32
int saved_win32_errno;
#endif
svp = av_fetch(PL_fdpid,PerlIO_fileno(ptr),TRUE);
pid = (int)SvIVX(*svp);
SvREFCNT_dec(*svp);
*svp = &PL_sv_undef;
#ifdef OS2
if (pid == -1) { /* Opened by popen. */
return my_syspclose(ptr);
}
#endif
if ((close_failed = (PerlIO_close(ptr) == EOF))) {
saved_errno = errno;
#ifdef VMS
saved_vaxc_errno = vaxc$errno;
#endif
#ifdef WIN32
saved_win32_errno = GetLastError();
#endif
}
#ifdef UTS
if(PerlProc_kill(pid, 0) < 0) { return(pid); } /* HOM 12/23/91 */
#endif
rsignal_save(SIGHUP, SIG_IGN, &hstat);
rsignal_save(SIGINT, SIG_IGN, &istat);
rsignal_save(SIGQUIT, SIG_IGN, &qstat);
do {
pid2 = wait4pid(pid, &status, 0);
} while (pid2 == -1 && errno == EINTR);
rsignal_restore(SIGHUP, &hstat);
rsignal_restore(SIGINT, &istat);
rsignal_restore(SIGQUIT, &qstat);
if (close_failed) {
SETERRNO(saved_errno, saved_vaxc_errno);
return -1;
}
return(pid2 < 0 ? pid2 : status == 0 ? 0 : (errno = 0, status));
}
#endif /* !DOSISH */
#if !defined(DOSISH) || defined(OS2) || defined(WIN32)
I32
wait4pid(int pid, int *statusp, int flags)
{
SV *sv;
SV** svp;
char spid[TYPE_CHARS(int)];
if (!pid)
return -1;
if (pid > 0) {
sprintf(spid, "%d", pid);
svp = hv_fetch(PL_pidstatus,spid,strlen(spid),FALSE);
if (svp && *svp != &PL_sv_undef) {
*statusp = SvIVX(*svp);
(void)hv_delete(PL_pidstatus,spid,strlen(spid),G_DISCARD);
return pid;
}
}
else {
HE *entry;
hv_iterinit(PL_pidstatus);
if (entry = hv_iternext(PL_pidstatus)) {
pid = atoi(hv_iterkey(entry,(I32*)statusp));
sv = hv_iterval(PL_pidstatus,entry);
*statusp = SvIVX(sv);
sprintf(spid, "%d", pid);
(void)hv_delete(PL_pidstatus,spid,strlen(spid),G_DISCARD);
return pid;
}
}
#ifdef HAS_WAITPID
# ifdef HAS_WAITPID_RUNTIME
if (!HAS_WAITPID_RUNTIME)
goto hard_way;
# endif
return PerlProc_waitpid(pid,statusp,flags);
#endif
#if !defined(HAS_WAITPID) && defined(HAS_WAIT4)
return wait4((pid==-1)?0:pid,statusp,flags,Null(struct rusage *));
#endif
#if !defined(HAS_WAITPID) && !defined(HAS_WAIT4) || defined(HAS_WAITPID_RUNTIME)
hard_way:
{
I32 result;
if (flags)
croak("Can't do waitpid with flags");
else {
while ((result = PerlProc_wait(statusp)) != pid && pid > 0 && result >= 0)
pidgone(result,*statusp);
if (result < 0)
*statusp = -1;
}
return result;
}
#endif
}
#endif /* !DOSISH || OS2 || WIN32 */
void
/*SUPPRESS 590*/
pidgone(int pid, int status)
{
register SV *sv;
char spid[TYPE_CHARS(int)];
sprintf(spid, "%d", pid);
sv = *hv_fetch(PL_pidstatus,spid,strlen(spid),TRUE);
(void)SvUPGRADE(sv,SVt_IV);
SvIVX(sv) = status;
return;
}
#if defined(atarist) || defined(OS2) || defined(DJGPP)
int pclose();
#ifdef HAS_FORK
int /* Cannot prototype with I32
in os2ish.h. */
my_syspclose(ptr)
#else
I32
my_pclose(ptr)
#endif
PerlIO *ptr;
{
/* Needs work for PerlIO ! */
FILE *f = PerlIO_findFILE(ptr);
I32 result = pclose(f);
PerlIO_releaseFILE(ptr,f);
return result;
}
#endif
void
repeatcpy(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
/* 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 <doughera@lafcol.lafayette.edu>
*/
/* Code modified to prefer proper named type ranges, I32, IV, or UV, instead
of LONG_(MIN/MAX).
-- Kenneth Albanowski <kjahds@kjahds.com>
*/
#ifndef MY_UV_MAX
# define MY_UV_MAX ((UV)IV_MAX * (UV)2 + (UV)1)
#endif
I32
cast_i32(f)
double f;
{
if (f >= I32_MAX)
return (I32) I32_MAX;
if (f <= I32_MIN)
return (I32) I32_MIN;
return (I32) f;
}
IV
cast_iv(f)
double f;
{
if (f >= IV_MAX)
return (IV) IV_MAX;
if (f <= IV_MIN)
return (IV) IV_MIN;
return (IV) f;
}
UV
cast_uv(f)
double f;
{
if (f >= MY_UV_MAX)
return (UV) MY_UV_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;
SV *tmpsv = sv_newmortal();
if (fa)
fa++;
else
fa = a;
if (fb)
fb++;
else
fb = b;
if (strNE(a,b))
return FALSE;
if (fa == a)
sv_setpv(tmpsv, ".");
else
sv_setpvn(tmpsv, a, fa - a);
if (PerlLIO_stat(SvPVX(tmpsv), &tmpstatbuf1) < 0)
return FALSE;
if (fb == b)
sv_setpv(tmpsv, ".");
else
sv_setpvn(tmpsv, b, fb - b);
if (PerlLIO_stat(SvPVX(tmpsv), &tmpstatbuf2) < 0)
return FALSE;
return tmpstatbuf1.st_dev == tmpstatbuf2.st_dev &&
tmpstatbuf1.st_ino == tmpstatbuf2.st_ino;
}
#endif /* !HAS_RENAME */
UV
scan_oct(char *start, I32 len, I32 *retlen)
{
register char *s = start;
register UV retval = 0;
bool overflowed = FALSE;
while (len && *s >= '0' && *s <= '7') {
register UV n = retval << 3;
if (!overflowed && (n >> 3) != retval) {
warn("Integer overflow in octal number");
overflowed = TRUE;
}
retval = n | (*s++ - '0');
len--;
}
if (PL_dowarn && len && (*s == '8' || *s == '9'))
warn("Illegal octal digit ignored");
*retlen = s - start;
return retval;
}
UV
scan_hex(char *start, I32 len, I32 *retlen)
{
register char *s = start;
register UV retval = 0;
bool overflowed = FALSE;
char *tmp = s;
while (len-- && *s && (tmp = strchr((char *) PL_hexdigit, *s))) {
register UV n = retval << 4;
if (!overflowed && (n >> 4) != retval) {
warn("Integer overflow in hex number");
overflowed = TRUE;
}
retval = n | ((tmp - PL_hexdigit) & 15);
s++;
}
if (PL_dowarn && !tmp) {
warn("Illegal hex digit ignored");
}
*retlen = s - start;
return retval;
}
char*
find_script(char *scriptname, bool dosearch, char **search_ext, I32 flags)
{
dTHR;
char *xfound = Nullch;
char *xfailed = Nullch;
char tmpbuf[512];
register char *s;
I32 len;
int retval;
#if defined(DOSISH) && !defined(OS2) && !defined(atarist)
# define SEARCH_EXTS ".bat", ".cmd", NULL
# define MAX_EXT_LEN 4
#endif
#ifdef OS2
# define SEARCH_EXTS ".cmd", ".btm", ".bat", ".pl", NULL
# define MAX_EXT_LEN 4
#endif
#ifdef VMS
# define SEARCH_EXTS ".pl", ".com", NULL
# define MAX_EXT_LEN 4
#endif
/* additional extensions to try in each dir if scriptname not found */
#ifdef SEARCH_EXTS
char *exts[] = { SEARCH_EXTS };
char **ext = search_ext ? search_ext : exts;
int extidx = 0, i = 0;
char *curext = Nullch;
#else
# define MAX_EXT_LEN 0
#endif
/*
* If dosearch is true and if scriptname does not contain path
* delimiters, search the PATH for scriptname.
*
* If SEARCH_EXTS is also defined, will look for each
* scriptname{SEARCH_EXTS} whenever scriptname is not found
* while searching the PATH.
*
* Assuming SEARCH_EXTS is C<".foo",".bar",NULL>, PATH search
* proceeds as follows:
* If DOSISH or VMSISH:
* + look for ./scriptname{,.foo,.bar}
* + search the PATH for scriptname{,.foo,.bar}
*
* If !DOSISH:
* + look *only* in the PATH for scriptname{,.foo,.bar} (note
* this will not look in '.' if it's not in the PATH)
*/
tmpbuf[0] = '\0';
#ifdef VMS
# ifdef ALWAYS_DEFTYPES
len = strlen(scriptname);
if (!(len == 1 && *scriptname == '-') && scriptname[len-1] != ':') {
int hasdir, idx = 0, deftypes = 1;
bool seen_dot = 1;
hasdir = !dosearch || (strpbrk(scriptname,":[</") != Nullch) ;
# else
if (dosearch) {
int hasdir, idx = 0, deftypes = 1;
bool seen_dot = 1;
hasdir = (strpbrk(scriptname,":[</") != Nullch) ;
# endif
/* The first time through, just add SEARCH_EXTS to whatever we
* already have, so we can check for default file types. */
while (deftypes ||
(!hasdir && my_trnlnm("DCL$PATH",tmpbuf,idx++)) )
{
if (deftypes) {
deftypes = 0;
*tmpbuf = '\0';
}
if ((strlen(tmpbuf) + strlen(scriptname)
+ MAX_EXT_LEN) >= sizeof tmpbuf)
continue; /* don't search dir with too-long name */
strcat(tmpbuf, scriptname);
#else /* !VMS */
#ifdef DOSISH
if (strEQ(scriptname, "-"))
dosearch = 0;
if (dosearch) { /* Look in '.' first. */
char *cur = scriptname;
#ifdef SEARCH_EXTS
if ((curext = strrchr(scriptname,'.'))) /* possible current ext */
while (ext[i])
if (strEQ(ext[i++],curext)) {
extidx = -1; /* already has an ext */
break;
}
do {
#endif
DEBUG_p(PerlIO_printf(Perl_debug_log,
"Looking for %s\n",cur));
if (PerlLIO_stat(cur,&PL_statbuf) >= 0) {
dosearch = 0;
scriptname = cur;
#ifdef SEARCH_EXTS
break;
#endif
}
#ifdef SEARCH_EXTS
if (cur == scriptname) {
len = strlen(scriptname);
if (len+MAX_EXT_LEN+1 >= sizeof(tmpbuf))
break;
cur = strcpy(tmpbuf, scriptname);
}
} while (extidx >= 0 && ext[extidx] /* try an extension? */
&& strcpy(tmpbuf+len, ext[extidx++]));
#endif
}
#endif
if (dosearch && !strchr(scriptname, '/')
#ifdef DOSISH
&& !strchr(scriptname, '\\')
#endif
&& (s = PerlEnv_getenv("PATH"))) {
bool seen_dot = 0;
PL_bufend = s + strlen(s);
while (s < PL_bufend) {
#if defined(atarist) || defined(DOSISH)
for (len = 0; *s
# ifdef atarist
&& *s != ','
# endif
&& *s != ';'; len++, s++) {
if (len < sizeof tmpbuf)
tmpbuf[len] = *s;
}
if (len < sizeof tmpbuf)
tmpbuf[len] = '\0';
#else /* ! (atarist || DOSISH) */
s = delimcpy(tmpbuf, tmpbuf + sizeof tmpbuf, s, PL_bufend,
':',
&len);
#endif /* ! (atarist || DOSISH) */
if (s < PL_bufend)
s++;
if (len + 1 + strlen(scriptname) + MAX_EXT_LEN >= sizeof tmpbuf)
continue; /* don't search dir with too-long name */
if (len
#if defined(atarist) || defined(DOSISH)
&& tmpbuf[len - 1] != '/'
&& tmpbuf[len - 1] != '\\'
#endif
)
tmpbuf[len++] = '/';
if (len == 2 && tmpbuf[0] == '.')
seen_dot = 1;
(void)strcpy(tmpbuf + len, scriptname);
#endif /* !VMS */
#ifdef SEARCH_EXTS
len = strlen(tmpbuf);
if (extidx > 0) /* reset after previous loop */
extidx = 0;
do {
#endif
DEBUG_p(PerlIO_printf(Perl_debug_log, "Looking for %s\n",tmpbuf));
retval = PerlLIO_stat(tmpbuf,&PL_statbuf);
#ifdef SEARCH_EXTS
} while ( retval < 0 /* not there */
&& extidx>=0 && ext[extidx] /* try an extension? */
&& strcpy(tmpbuf+len, ext[extidx++])
);
#endif
if (retval < 0)
continue;
if (S_ISREG(PL_statbuf.st_mode)
&& cando(S_IRUSR,TRUE,&PL_statbuf)
#ifndef DOSISH
&& cando(S_IXUSR,TRUE,&PL_statbuf)
#endif
)
{
xfound = tmpbuf; /* bingo! */
break;
}
if (!xfailed)
xfailed = savepv(tmpbuf);
}
#ifndef DOSISH
if (!xfound && !seen_dot && !xfailed && (PerlLIO_stat(scriptname,&PL_statbuf) < 0))
#endif
seen_dot = 1; /* Disable message. */
if (!xfound) {
if (flags & 1) { /* do or die? */
croak("Can't %s %s%s%s",
(xfailed ? "execute" : "find"),
(xfailed ? xfailed : scriptname),
(xfailed ? "" : " on PATH"),
(xfailed || seen_dot) ? "" : ", '.' not in PATH");
}
scriptname = Nullch;
}
if (xfailed)
Safefree(xfailed);
scriptname = xfound;
}
return (scriptname ? savepv(scriptname) : Nullch);
}
#ifdef USE_THREADS
#ifdef FAKE_THREADS
/* Very simplistic scheduler for now */
void
schedule(void)
{
thr = thr->i.next_run;
}
void
perl_cond_init(cp)
perl_cond *cp;
{
*cp = 0;
}
void
perl_cond_signal(cp)
perl_cond *cp;
{
perl_os_thread t;
perl_cond cond = *cp;
if (!cond)
return;
t = cond->thread;
/* Insert t in the runnable queue just ahead of us */
t->i.next_run = thr->i.next_run;
thr->i.next_run->i.prev_run = t;
t->i.prev_run = thr;
thr->i.next_run = t;
thr->i.wait_queue = 0;
/* Remove from the wait queue */
*cp = cond->next;
Safefree(cond);
}
void
perl_cond_broadcast(cp)
perl_cond *cp;
{
perl_os_thread t;
perl_cond cond, cond_next;
for (cond = *cp; cond; cond = cond_next) {
t = cond->thread;
/* Insert t in the runnable queue just ahead of us */
t->i.next_run = thr->i.next_run;
thr->i.next_run->i.prev_run = t;
t->i.prev_run = thr;
thr->i.next_run = t;
thr->i.wait_queue = 0;
/* Remove from the wait queue */
cond_next = cond->next;
Safefree(cond);
}
*cp = 0;
}
void
perl_cond_wait(cp)
perl_cond *cp;
{
perl_cond cond;
if (thr->i.next_run == thr)
croak("panic: perl_cond_wait called by last runnable thread");
New(666, cond, 1, struct perl_wait_queue);
cond->thread = thr;
cond->next = *cp;
*cp = cond;
thr->i.wait_queue = cond;
/* Remove ourselves from runnable queue */
thr->i.next_run->i.prev_run = thr->i.prev_run;
thr->i.prev_run->i.next_run = thr->i.next_run;
}
#endif /* FAKE_THREADS */
#ifdef OLD_PTHREADS_API
struct perl_thread *
getTHR _((void))
{
pthread_addr_t t;
if (pthread_getspecific(PL_thr_key, &t))
croak("panic: pthread_getspecific");
return (struct perl_thread *) t;
}
#endif /* OLD_PTHREADS_API */
MAGIC *
condpair_magic(SV *sv)
{
MAGIC *mg;
SvUPGRADE(sv, SVt_PVMG);
mg = mg_find(sv, 'm');
if (!mg) {
condpair_t *cp;
New(53, cp, 1, condpair_t);
MUTEX_INIT(&cp->mutex);
COND_INIT(&cp->owner_cond);
COND_INIT(&cp->cond);
cp->owner = 0;
LOCK_SV_MUTEX;
mg = mg_find(sv, 'm');
if (mg) {
/* someone else beat us to initialising it */
UNLOCK_SV_MUTEX;
MUTEX_DESTROY(&cp->mutex);
COND_DESTROY(&cp->owner_cond);
COND_DESTROY(&cp->cond);
Safefree(cp);
}
else {
sv_magic(sv, Nullsv, 'm', 0, 0);
mg = SvMAGIC(sv);
mg->mg_ptr = (char *)cp;
mg->mg_len = sizeof(cp);
UNLOCK_SV_MUTEX;
DEBUG_S(WITH_THR(PerlIO_printf(PerlIO_stderr(),
"%p: condpair_magic %p\n", thr, sv));)
}
}
return mg;
}
/*
* Make a new perl thread structure using t as a prototype. Some of the
* fields for the new thread are copied from the prototype thread, t,
* so t should not be running in perl at the time this function is
* called. The use by ext/Thread/Thread.xs in core perl (where t is the
* thread calling new_struct_thread) clearly satisfies this constraint.
*/
struct perl_thread *
new_struct_thread(struct perl_thread *t)
{
struct perl_thread *thr;
SV *sv;
SV **svp;
I32 i;
sv = newSVpv("", 0);
SvGROW(sv, sizeof(struct perl_thread) + 1);
SvCUR_set(sv, sizeof(struct perl_thread));
thr = (Thread) SvPVX(sv);
/* debug */
memset(thr, 0xab, sizeof(struct perl_thread));
PL_markstack = 0;
PL_scopestack = 0;
PL_savestack = 0;
PL_retstack = 0;
PL_dirty = 0;
PL_localizing = 0;
/* end debug */
thr->oursv = sv;
init_stacks(ARGS);
PL_curcop = &PL_compiling;
thr->cvcache = newHV();
thr->threadsv = newAV();
thr->specific = newAV();
thr->errsv = newSVpv("", 0);
thr->errhv = newHV();
thr->flags = THRf_R_JOINABLE;
MUTEX_INIT(&thr->mutex);
PL_curcop = t->Tcurcop; /* XXX As good a guess as any? */
PL_defstash = t->Tdefstash; /* XXX maybe these should */
PL_curstash = t->Tcurstash; /* always be set to main? */
/* top_env needs to be non-zero. It points to an area
in which longjmp() stuff is stored, as C callstack
info there at least is thread specific this has to
be per-thread. Otherwise a 'die' in a thread gives
that thread the C stack of last thread to do an eval {}!
See comments in scope.h
Initialize top entry (as in perl.c for main thread)
*/
PL_start_env.je_prev = NULL;
PL_start_env.je_ret = -1;
PL_start_env.je_mustcatch = TRUE;
PL_top_env = &PL_start_env;
PL_in_eval = FALSE;
PL_restartop = 0;
PL_tainted = t->Ttainted;
PL_curpm = t->Tcurpm; /* XXX No PMOP ref count */
PL_nrs = newSVsv(t->Tnrs);
PL_rs = SvREFCNT_inc(PL_nrs);
PL_last_in_gv = Nullgv;
PL_ofslen = t->Tofslen;
PL_ofs = savepvn(t->Tofs, PL_ofslen);
PL_defoutgv = (GV*)SvREFCNT_inc(t->Tdefoutgv);
PL_chopset = t->Tchopset;
PL_formtarget = newSVsv(t->Tformtarget);
PL_bodytarget = newSVsv(t->Tbodytarget);
PL_toptarget = newSVsv(t->Ttoptarget);
PL_statname = NEWSV(66,0);
PL_maxscream = -1;
PL_regcompp = FUNC_NAME_TO_PTR(pregcomp);
PL_regexecp = FUNC_NAME_TO_PTR(regexec_flags);
PL_regindent = 0;
PL_reginterp_cnt = 0;
PL_lastscream = Nullsv;
PL_screamfirst = 0;
PL_screamnext = 0;
PL_reg_start_tmp = 0;
PL_reg_start_tmpl = 0;
/* Initialise all per-thread SVs that the template thread used */
svp = AvARRAY(t->threadsv);
for (i = 0; i <= AvFILLp(t->threadsv); i++, svp++) {
if (*svp && *svp != &PL_sv_undef) {
SV *sv = newSVsv(*svp);
av_store(thr->threadsv, i, sv);
sv_magic(sv, 0, 0, &PL_threadsv_names[i], 1);
DEBUG_S(PerlIO_printf(PerlIO_stderr(),
"new_struct_thread: copied threadsv %d %p->%p\n",i, t, thr));
}
}
thr->threadsvp = AvARRAY(thr->threadsv);
MUTEX_LOCK(&PL_threads_mutex);
PL_nthreads++;
thr->tid = ++PL_threadnum;
thr->next = t->next;
thr->prev = t;
t->next = thr;
thr->next->prev = thr;
MUTEX_UNLOCK(&PL_threads_mutex);
#ifdef HAVE_THREAD_INTERN
init_thread_intern(thr);
#endif /* HAVE_THREAD_INTERN */
return thr;
}
#endif /* USE_THREADS */
#ifdef HUGE_VAL
/*
* This hack is to force load of "huge" support from libm.a
* So it is in perl for (say) POSIX to use.
* Needed for SunOS with Sun's 'acc' for example.
*/
double
Perl_huge(void)
{
return HUGE_VAL;
}
#endif
#ifdef PERL_GLOBAL_STRUCT
struct perl_vars *
Perl_GetVars(void)
{
return &PL_Vars;
}
#endif
char **
get_op_names(void)
{
return op_name;
}
char **
get_op_descs(void)
{
return op_desc;
}
char *
get_no_modify(void)
{
return (char*)no_modify;
}
U32 *
get_opargs(void)
{
return opargs;
}
SV **
get_specialsv_list(void)
{
return PL_specialsv_list;
}
Reference in New Issue View Git Blame Copy Permalink