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arxfuncs.c
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arxfuncs.c
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/*
* ARexx functions for regina
* Copyright © 2002, Staf Verhaegen
*
* This library is free software; you can redistribute it and/or
* modify it under the terms of the GNU Library General Public
* License as published by the Free Software Foundation; either
* version 2 of the License, or (at your option) any later version.
*
* This library is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
* Library General Public License for more details.
*
* You should have received a copy of the GNU Library General Public
* License along with this library; if not, write to the Free
* Software Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
*/
/* This files contains functions that are implemented in ARexx
* but that are not standard REXX functions. This file contains
* the functions that can be used on all platforms. amifuncs.c
* contains the ARexx functions that are only usable on the
* amiga platform or compatibles. (not implemented yet)
*/
#ifndef _GNU_SOURCE
# define _GNU_SOURCE
#endif
#include "rexx.h"
#include <stdio.h>
#include <stdlib.h>
#include <limits.h>
#if !defined(__WINS__) && !defined(__EPOC32__)
# include <float.h>
#else
# define DBL_EPSILON 2.2204460492503131e-016
#endif
#include <assert.h>
#ifdef HAVE_UNISTD_H
# include <unistd.h>
#endif
staticstreng(_fname, "F");
staticstreng(_fstem, "FI.F");
#if defined(_AMIGA) || defined(__AROS__)
# if defined(GCC)
# include <memory.h>
# include <sys/exec.h>
# else
# include <exec/memory.h>
# include <proto/exec.h>
# endif
#endif
typedef struct _arexx_tsd_t {
proclevel amilevel;
#ifdef rx_64u
rx_64u a,Xn,c;
#else
unsigned long ah,al,Xnh,Xnl,c;
#endif
} arexx_tsd_t;
#if !defined( HAVE_DIV )
typedef struct _div_t
{
int quot;
int rem;
} div_t;
typedef struct _ldiv_t
{
long quot;
long rem;
} ldiv_t;
div_t div(int x,int y)
{
div_t result;
result.quot = x / y;
result.rem = x % y;
return result;
}
ldiv_t ldiv(long x,long y)
{
ldiv_t result;
result.quot = x / y;
result.rem = x % y;
return result;
}
#endif
/*
* Init thread data for arexx functions.
*/
int init_arexxf( tsd_t *TSD )
{
arexx_tsd_t *at;
if ( TSD->arx_tsd != NULL )
return 1;
if ( ( TSD->arx_tsd = MallocTSD( sizeof( arexx_tsd_t ) ) ) == NULL )
return 0;
at = (arexx_tsd_t *)TSD->arx_tsd;
memset( at, 0, sizeof( arexx_tsd_t ) );
/* glibc's starting value is 0 for the whole Xn, we use a seed of 0x1234ABCD */
#ifdef rx_64u
at->a = rx_mk64u( 0x0005DEECE66D );
at->Xn = rx_mk64u( 0x1234ABCD330E );
at->c = 0xB;
#else
at->ah = 0x5;
at->al = 0xDEECE66Dul;
at->Xnh = 0x1234;
at->Xnl = 0xABCD330Eul;
at->c = 0xB;
#endif
return 1;
}
/*
* The implementation of srand48 and drand48 with fixed values in a thread safe
* manner.
*
* We have to produce a value in the interval [0,1[ (zero until one but
* without one) from a 48 bit unsigned integer. This is done by a division by
* the maximum value corrected by small double. This small double is computed
* from the constant DBL_EPSILON.
*
* / a) 1+e > 1 and e > 0
* DBL_EPSILON = e with both
* \ b) there is no number e', e' < e
*
* We increase the divisor of 2**48-1 by (2**48-1)*DBL_EPSILON and have
* the wanted final divisor. That is with 2**48 - 1 = 281474976710655
*/
#define twoE48m1 281474976710655.0
#define divisor ( twoE48m1 * ( 1.0 + DBL_EPSILON ) )
#ifdef rx_64u
/*
* srand48 sets the upper 32 bit of Xn. The lower 16 bit are set to 330E.
*/
static void rx_srand48( const tsd_t *TSD, unsigned long ul )
{
arexx_tsd_t *at = (arexx_tsd_t *)TSD->arx_tsd;
rx_64u ull;
ull = ul & 0xFFFFFFFF;
ull <<= 16;
at->Xn = ull | 0x330E;
}
/*
* Compute X(n+1) = a * X(n) + c
*/
static double rng( arexx_tsd_t *at )
{
rx_64u Xn1;
Xn1 = at->a * at->Xn + at->c;
at->Xn = Xn1 & rx_mk64u( 0xFFFFFFFFFFFF );
# ifdef _MSC_VER
return (double) (signed __int64) at->Xn;
# else
return (double) at->Xn;
# endif
}
#else
static void rx_srand48( const tsd_t *TSD, unsigned long ul )
{
arexx_tsd_t *at = TSD->arx_tsd;
at->Xnh = ( ul >> 16 ) & 0xFFFF;
at->Xnl = ( ( ul & 0xFFFF ) << 16 ) | 0x330E;
}
static double rng( arexx_tsd_t *at )
{
double retval;
unsigned long Xn1h,Xn1l;
unsigned long h,al,ah,bl,bh;
/*
* Doing 64 bit multiplication and addition by hand.
*
* be H = 2*32.
* be A = ah*H + al, with ah<H and al<H
* be B = bh*H + bl, with bh<H and bl<H
*
* then we can compute A*B as:
*
* (ah*H+al)*(bh*H+bl) = ah*bh*H*H +
* ah*bl*H +
* bh*al*H +
* al*bl
*
* We have to add an additional term c, c small and we operate modulo
* 2**48-1. This keeps life simple because we may throw away the
* term ah*bh*H*H because the number is greater as 2**48 without rest.
*
* Furthermore we don't have to bother about carries in the multiplication
* and addition of ah*bl*H and al*bh*H. Finally the term c is so small that
* al*bl+c won't have any further carrying operation.
*
* Indeed, because we want the lower 16 bit part of ah*bl+bh*al, we can
* compute as usual, add the carry of al*bl+c and that's it.
*
* There is just one lack:
* We need everything of al*bl. So we have to compute as above but with
* 16 bit unsigneds to let the product be littler than 2**32.
*
* Perfrom this 16 bit operations first.
*/
al = at->al & 0xFFFF;
ah = at->al >> 16;
bl = at->Xnl & 0xFFFF;
bh = at->Xnl >> 16;
h = al * bl + at->c;
Xn1l = h & 0xFFFF; /* done lower 16 bit */
/*
* Process the *H, H=16 part. Every overflow in addition will be in the
* 48 bit counted from 0, so the final modulo will cut it. Therefore
* we are allowed to ignore every overflow.
*/
h >>= 16;
h += al * bh + ah * bl;
Xn1l |= (h << 16) & 0xFFFF0000; /* done middle 16 bit */
Xn1h = h >> 16;
Xn1h += ah * bh;
/*
* Now do the ah*bl*H + bh*al+H for the outer 32 bit operation.
*/
Xn1h += at->ah * at->Xnl + at->al * at->Xnh;
at->Xnh = Xn1h & 0xFFFF;
at->Xnl = Xn1l;
retval = at->Xnh;
retval *= 4294967296.0l;
retval += at->Xnl;
return retval;
}
#endif
/*
* Map a random value computed by rng of the range [0,2**48[ to the
* range [0,1[
*/
static double rx_drand48( const tsd_t *TSD )
{
arexx_tsd_t *at = (arexx_tsd_t *)TSD->arx_tsd;
double big;
big = (double) rng( at );
return (double) big / divisor;
}
/*
* Support functions for the ARexx IO functions
*/
/* setamilevel will change the environment to the variables used for open files */
static proclevel setamilevel( tsd_t *TSD )
{
arexx_tsd_t *atsd = (arexx_tsd_t *)TSD->arx_tsd;
proclevel oldlevel = TSD->currlevel;
if (atsd->amilevel!=NULL)
TSD->currlevel = atsd->amilevel;
else
{
char txt[20];
atsd->amilevel = newlevel( TSD, NULL );
TSD->currlevel = atsd->amilevel;
setvalue( TSD, _fname, Str_cre_TSD( TSD, "STDIN" ), -1 );
sprintf( txt, "%p", stdin );
setvalue( TSD, _fstem, Str_cre_TSD( TSD, txt ), -1 );
setvalue( TSD, _fname, Str_cre_TSD( TSD, "STDOUT" ), -1 );
sprintf( txt, "%p", stdout );
setvalue( TSD, _fstem, Str_cre_TSD( TSD, txt ), -1 );
setvalue( TSD, _fname, Str_cre_TSD( TSD, "STDERR" ), -1 );
sprintf( txt, "%p", stderr );
setvalue( TSD, _fstem, Str_cre_TSD( TSD, txt ), -1 );
}
return oldlevel;
}
/* getfile will return the FILE pointer of given name */
static FILE *getfile( tsd_t *TSD, const streng *name )
{
proclevel oldlevel = setamilevel( TSD );
const streng *s;
char *txt;
FILE *file=NULL;
setvalue( TSD, _fname, Str_dup_TSD( TSD, name ), -1 );
if ( isvariable( TSD, _fstem ) )
{
s = getvalue( TSD, _fstem, -1 );
txt = str_of( TSD, s );
sscanf( txt, "%p", &file );
FreeTSD( txt );
}
TSD->currlevel = oldlevel;
return file;
}
/* getfilenames will return a list of all opened files */
static streng *getfilenames( tsd_t *TSD, const streng *sep )
{
proclevel oldlevel = setamilevel( TSD );
streng *retval = NULL, *tmpstr;
int first = 1;
variableptr var;
get_next_variable( TSD, 1 );
for ( var = get_next_variable( TSD, 0);
var != NULL;
var = get_next_variable( TSD, 0) )
{
while ( var != NULL && var->realbox != NULL )
var = var->realbox;
if ( var != NULL && ( (var->flag & (VFLAG_STR | VFLAG_NUM)) || var->stem ) )
{
if ( first )
{
retval = Str_dup_TSD( TSD, var->name );
first = 0;
}
else
{
tmpstr = Str_cat_TSD( TSD, retval, sep );
if ( tmpstr != retval )
{
Free_string_TSD( TSD, retval );
retval = tmpstr;
}
tmpstr = Str_cat_TSD( TSD, retval, var->name );
if ( tmpstr != retval )
{
Free_string_TSD( TSD, retval );
retval = tmpstr;
}
}
}
}
TSD->currlevel = oldlevel;
/* If no variable present return NULL string */
if (first)
retval = nullstringptr();
return retval;
}
/* addfile: store the FILE pointer in a given name */
static void addfile( tsd_t *TSD, const streng *name, FILE *file )
{
proclevel oldlevel = setamilevel( TSD );
char txt[20];
streng *s;
sprintf( txt, "%p", (void *)file );
s = Str_cre_TSD( TSD, txt );
setvalue( TSD, _fname, Str_dup_TSD( TSD, name ), -1 );
setvalue( TSD, _fstem, s, -1 );
TSD->currlevel = oldlevel;
}
/* rmfile: remove a given of open files list */
static void rmfile( tsd_t *TSD, const streng *name )
{
arexx_tsd_t *atsd = (arexx_tsd_t *)TSD->arx_tsd;
proclevel oldlevel = setamilevel( TSD );
TSD->currlevel = atsd->amilevel;
drop_var( TSD, name );
TSD->currlevel = oldlevel;
}
/*
* Implementation of the ARexx IO functions
* See general documentation for more information
* Functions implemented: OPEN, CLOSE, READCH, READLN, WRITECH, WRITELN, EOF, SEEK
*/
streng *arexx_open( tsd_t *TSD, cparamboxptr parm1 )
{
cparamboxptr parm2, parm3;
char *filename;
FILE *file;
int mode;
static const char* modestrings[] = {
"w",
"r+",
"a"
};
checkparam( parm1, 2, 3, "OPEN" );
parm2 = parm1->next;
parm3 = parm2->next;
file = getfile( TSD, parm1->value );
if ( file!=NULL )
{
return int_to_streng( TSD, 0 );
}
filename = str_of( TSD, parm2->value );
if ( parm3==NULL
|| parm3->value==NULL
|| parm3->value->len==0 )
mode=0;
else switch( getoptionchar( TSD, parm3->value, "OPEN", 3, "", "WRA" ) )
{
case 'W':
mode=0;
break;
case 'R':
mode=1;
break;
case 'A':
mode=2;
break;
default:
mode=0;
assert(0);
break;
}
file = fopen( filename, modestrings[mode] );
FreeTSD( filename );
if ( file==NULL )
{
return int_to_streng( TSD, 0 );
}
addfile( TSD, parm1->value, file );
return int_to_streng( TSD, 1);
}
streng *arexx_close( tsd_t *TSD, cparamboxptr parm1 )
{
FILE *file;
checkparam( parm1, 1, 1, "CLOSE" );
file = getfile( TSD, parm1->value );
if ( file==NULL )
return int_to_streng( TSD, 0 );
fclose( file );
rmfile( TSD, parm1->value );
return int_to_streng( TSD, 1 );
}
streng *arexx_writech( tsd_t *TSD, cparamboxptr parm1 )
{
cparamboxptr parm2;
FILE *file;
int count;
checkparam( parm1, 2, 2, "WRITECH" );
parm2 = parm1->next;
file = getfile( TSD, parm1->value );
if ( file==NULL )
exiterror( ERR_INCORRECT_CALL, 27, "WRITECH", tmpstr_of( TSD, parm1->value ));
count = fwrite( parm2->value->value, 1, Str_len(parm2->value), file );
return int_to_streng( TSD, count );
}
streng *arexx_writeln( tsd_t *TSD, cparamboxptr parm1 )
{
cparamboxptr parm2;
char *txt;
FILE *file;
int count;
checkparam( parm1, 2, 2, "WRITELN" );
parm2 = parm1->next;
file = getfile( TSD, parm1->value );
if ( file==NULL )
exiterror( ERR_INCORRECT_CALL, 27, "WRITELN", tmpstr_of( TSD, parm1->value ) );
txt = str_of( TSD, parm2->value );
count = fprintf(file, "%s\n", txt);
FreeTSD( txt );
return int_to_streng( TSD, count );
}
streng *arexx_seek( tsd_t *TSD, cparamboxptr parm1 )
{
cparamboxptr parm2, parm3;
FILE *file;
int pos, error, wench;
long offset;
checkparam( parm1, 2, 3, "SEEK" );
parm2 = parm1->next;
parm3 = parm2->next;
file = getfile( TSD, parm1->value );
if ( file==NULL )
exiterror( ERR_INCORRECT_CALL, 27, "SEEK", tmpstr_of( TSD, parm1->value ) );
offset = streng_to_int( TSD, parm2->value, &error );
if (error)
exiterror( ERR_INCORRECT_CALL, 11, "SEEK", 2, tmpstr_of( TSD, parm2->value ) );
if ( parm3==NULL
|| parm3->value==NULL
|| parm3->value->len == 0 )
wench = SEEK_CUR;
else switch( getoptionchar( TSD, parm3->value, "SEEK", 3, "", "CBE" ) )
{
case 'C':
wench = SEEK_CUR;
break;
case 'B':
wench = SEEK_SET;
break;
case 'E':
wench = SEEK_END;
break;
default:
wench = SEEK_CUR;
assert(0);
break;
}
pos = ftell( file );
if ( fseek( file, offset, wench ) != -1 )
{
pos = ftell( file );
}
return int_to_streng( TSD, pos );
}
streng *arexx_readch( tsd_t *TSD, cparamboxptr parm1 )
{
cparamboxptr parm2;
FILE *file;
checkparam( parm1, 1, 2, "READCH");
parm2 = parm1->next;
file = getfile( TSD, parm1->value );
if ( file==NULL )
exiterror( ERR_INCORRECT_CALL, 27, "READCH", tmpstr_of( TSD, parm1->value ) );
if ( parm2==NULL )
{
char buffer[2] = { 0, 0 };
buffer[0] = (char)getc( file );
return Str_cre_TSD( TSD, buffer );
}
else
{
int count, error;
streng *ret;
count = streng_to_int( TSD, parm2->value, &error );
if ( error )
exiterror( ERR_INCORRECT_CALL, 11, "READCH", 2, tmpstr_of( TSD, parm2->value ) );
if ( count<=0 )
exiterror( ERR_INCORRECT_CALL, 14, "READCH", 2, tmpstr_of( TSD, parm2->value ) );
ret = Str_makeTSD( count );
count = fread( ret->value, 1, count, file );
if ( count == -1 )
{
/*
* Fixme: What shall happen in this case?
* Setting count to 0 seems a little bit weak for me but better
* than doing more strange things. FGC
*/
count = 0;
}
ret->len = count;
return ret;
}
}
streng *arexx_readln( tsd_t *TSD, cparamboxptr parm )
{
FILE *file;
char buffer[1001];
checkparam( parm, 1, 1, "READLN");
file = getfile( TSD, parm->value );
if ( file==NULL )
exiterror( ERR_INCORRECT_CALL, 27, "READLN", tmpstr_of( TSD, parm->value ) );
fgets( buffer, 1001, file );
if ( buffer[strlen(buffer)-1]=='\n' )
buffer[strlen(buffer)-1]=0;
return Str_cre_TSD( TSD, buffer );
}
streng *arexx_eof( tsd_t *TSD, cparamboxptr parm )
{
FILE *file;
checkparam( parm, 1, 1, "EOF" );
file = getfile( TSD, parm->value );
if ( file==NULL )
exiterror( ERR_INCORRECT_CALL, 27, "EOF", tmpstr_of( TSD, parm->value ) );
return int_to_streng( TSD, feof( file )!=0 );
}
/*
* Implementation of the additional conversion functions from ARexx
* Functions: B2C, C2B
*/
streng *arexx_b2c( tsd_t *TSD, cparamboxptr parm )
{
parambox parm2;
streng *ret;
checkparam( parm, 1, 1, "B2C" );
parm2.next = NULL;
parm2.value = std_b2x( TSD, parm );
ret = std_x2c( TSD, &parm2 );
Free_string_TSD( TSD, parm2.value );
return ret;
}
streng *arexx_c2b( tsd_t *TSD, cparamboxptr parm )
{
parambox parm2;
streng *ret;
checkparam( parm, 1, 1, "B2C" );
parm2.next = NULL;
parm2.value = std_c2x( TSD, parm );
ret = std_x2b( TSD, &parm2 );
Free_string_TSD( TSD, parm2.value );
return ret;
}
/*
* Implementation of the bitwise function from ARexx
* Functions: BITCHG, BITCLR, BITSET, BITTST, BITCOMP
*/
streng *arexx_bitchg( tsd_t *TSD, cparamboxptr parm1 )
{
cparamboxptr parm2;
streng *ret;
int bit, error, byte;
div_t dt;
checkparam( parm1, 2, 2, "BITCHG" );
parm2 = parm1->next;
bit = streng_to_int( TSD, parm2->value, &error );
if ( error )
exiterror( ERR_INCORRECT_CALL, 11, "BITCHG", 2, tmpstr_of( TSD, parm2->value ) );
if ( bit<0 )
exiterror( ERR_INCORRECT_CALL, 13, "BITCHG", 2, tmpstr_of( TSD, parm2->value ) );
dt = div( bit, 8 );
byte = parm1->value->len-dt.quot-1;
if ( byte<0 )
exiterror( ERR_INCORRECT_CALL, 0 );
ret = Str_dup_TSD( TSD, parm1->value );
ret->value[byte]^=(char)(1<<dt.rem);
return ret;
}
streng *arexx_bitclr( tsd_t *TSD, cparamboxptr parm1 )
{
cparamboxptr parm2;
streng *ret;
int bit, error, byte;
div_t dt;
checkparam( parm1, 2, 2, "BITCLR" );
parm2 = parm1->next;
bit = streng_to_int( TSD, parm2->value, &error );
if ( error )
exiterror( ERR_INCORRECT_CALL, 11, "BITCLR", 2, tmpstr_of( TSD, parm2->value ) );
if ( bit<0 )
exiterror( ERR_INCORRECT_CALL, 13, "BITCLR", 2, tmpstr_of( TSD, parm2->value ) );
dt = div( bit, 8 );
byte = parm1->value->len-dt.quot-1;
if ( byte<0 )
exiterror( ERR_INCORRECT_CALL, 0 );
ret = Str_dup_TSD( TSD, parm1->value );
ret->value[byte]&=~(char)(1<<dt.rem);
return ret;
}
streng *arexx_bitset( tsd_t *TSD, cparamboxptr parm1 )
{
cparamboxptr parm2;
streng *ret;
int bit, error, byte;
div_t dt;
checkparam( parm1, 2, 2, "BITSET" );
parm2 = parm1->next;
bit = streng_to_int( TSD, parm2->value, &error );
if ( error )
exiterror( ERR_INCORRECT_CALL, 11, "BITSET", 2, tmpstr_of( TSD, parm2->value ) );
if ( bit<0 )
exiterror( ERR_INCORRECT_CALL, 13, "BITSET", 2, tmpstr_of( TSD, parm2->value ) );
dt = div( bit, 8 );
byte = parm1->value->len-dt.quot-1;
if ( byte<0 )
exiterror( ERR_INCORRECT_CALL, 0 );
ret = Str_dup_TSD( TSD, parm1->value );
ret->value[byte]|=(char)(1<<dt.rem);
return ret;
}
streng *arexx_bittst( tsd_t *TSD, cparamboxptr parm1 )
{
cparamboxptr parm2;
streng *ret;
int bit, error, byte;
div_t dt;
checkparam( parm1, 2, 2, "BITTST" );
parm2 = parm1->next;
bit = streng_to_int( TSD, parm2->value, &error );
if ( error )
exiterror( ERR_INCORRECT_CALL, 11, "BITTST", 2, tmpstr_of( TSD, parm2->value ) );
if ( bit<0 )
exiterror( ERR_INCORRECT_CALL, 13, "BITTST", 2, tmpstr_of( TSD, parm2->value ) );
dt = div( bit, 8 );
byte = parm1->value->len-dt.quot-1;
if ( byte<0 )
exiterror( ERR_INCORRECT_CALL, 0 );
ret = int_to_streng( TSD, (parm1->value->value[byte] & (char)(1<<dt.rem))!=0 );
return ret;
}
/* Help function for arexx_bitcomp */
static int firstbit(char c)
{
int i;
assert(c!=0);
for ( i=0; i<8; i++)
{
if (c & 1)
return i;
else
c = (char)(c >> 1);
}
return 8;
}
/* This ARexx function has very weird usage of the pad byte,
* the shortest string is padded on the left with this byte
*/
streng *arexx_bitcomp( tsd_t *TSD, cparamboxptr parm1 )
{
cparamboxptr parm2, parm3;
const streng *s1, *s2;
const char *cp1, *cp2;
char pad;
int i;
checkparam( parm1, 2, 3, "BITCOMP" );
parm2 = parm1->next;
/* Make s2 always shorter or equal to s1 */
if ( parm1->value->len < parm2->value->len )
{
s1 = parm2->value;
s2 = parm1->value;
} else {
s1 = parm1->value;
s2 = parm2->value;
}
for ( cp1=s1->value+s1->len-1, cp2=s2->value+s2->len-1, i=0;
cp2 >= s2->value;
cp1--, cp2--, i++ )
{
if ( *cp1 != *cp2 )
return int_to_streng( TSD, i*8 + firstbit( ( char ) ( *cp1 ^ *cp2 ) ) );
}
parm3 = parm2->next;
if ( parm3==NULL || parm3->value==NULL || parm3->value->len==0 )
pad = 0;
else
pad = parm3->value->value[0];
for ( ;
cp1 >= s1->value;
cp1--, i++ )
{
if ( *cp1 != pad )
return int_to_streng( TSD, i*8 + firstbit( ( char ) ( *cp1 ^ pad ) ) );
}
return int_to_streng( TSD, -1 );
}
/*
* Some more misc. ARexx functions
* Functions: COMPRESS, HASH, RANDU, TRIM, UPPER
*/
streng *arexx_hash( tsd_t *TSD, cparamboxptr parm1 )
{
unsigned char *uc;
int i, sum=0;
checkparam( parm1, 1, 1, "HASH" );
uc = (unsigned char *)parm1->value->value;
for ( i=0; i<parm1->value->len; i++)
{
sum = (sum + uc[i]) & 255;
}
return int_to_streng( TSD, sum );
}
streng *arexx_compress( tsd_t *TSD, cparamboxptr parm1 )
{
const char *match;
int i, start;
streng *ret;
checkparam( parm1, 1, 2, "COMPRESS" );
match = ( parm1->next!=NULL ) ? str_of( TSD, parm1->next->value ) : " ";
ret = Str_dup_TSD( TSD, parm1->value );
for ( i=start=0; i<ret->len; i++ )
{
/* Copy char if not found */
if ( strchr( match, ret->value[i] )==NULL )
{
ret->value[start] = ret->value[i];
start++;
}
}
ret->len = start;
if ( parm1->next!=NULL )
FreeTSD( (char *)match );
return ret;
}
static const streng T_str = { 1, 1, "T" };
static const parambox T_parm = { NULL, 0, (streng *)&T_str };
streng *arexx_trim( tsd_t *TSD, cparamboxptr parm1 )
{
parambox parm;
checkparam( parm1, 1, 1, "TRIM" );
parm = *parm1;
parm.next = (paramboxptr)&T_parm;
return std_strip( TSD, parm1 );
}
streng *arexx_upper( tsd_t *TSD, cparamboxptr parms )
{
rx_64 rlength=0, length=0, start=1, i=0 ;
int changecount;
char padch=' ' ;
streng *str=NULL, *ptr=NULL ;
paramboxptr bptr=NULL ;
/*
* Check that we have between 1 and 4 args
* ( str [,start[,length[,pad]]] )
*/
checkparam( parms, 1, 4 , "UPPER" ) ;
str = parms->value ;
rlength = Str_len( str ) ;
/*
* Get starting position, if supplied...
*/
if ( parms->next != NULL
&& parms->next->value )
start = atoposrx64( TSD, parms->next->value, "UPPER", 2 ) ;
/*
* Get length, if supplied...
*/
if ( parms->next != NULL
&& ( (bptr = parms->next->next) != NULL )
&& ( parms->next->next->value ) )
length = atozposrx64( TSD, parms->next->next->value, "UPPER", 3 ) ;
else
length = ( rlength >= start ) ? rlength - start + 1 : 0;
/*
* Get pad character, if supplied...
*/
if ( (bptr )
&& ( bptr->next )
&& ( bptr->next->value ) )
padch = getonechar( TSD, parms->next->next->next->value, "UPPER", 4) ;
/*
* Create our new starting; duplicate of input string
*/
ptr = Str_makeTSD( rlength );
memcpy( Str_val( ptr ), Str_val( str ), Str_len( str ) );
/*
* Determine where to start changing case...
*/
i = ((rlength>=start)?start-1:rlength) ;