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client.c
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client.c
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/*
* The Regina Rexx Interpreter
* Copyright (C) 1993-1994 Anders Christensen <anders@pvv.unit.no>
*
* 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.
*/
/* JH 20-10-99 */ /* To make Direct setting of stems Direct and not Symbolic. */
#include "regina_c.h"
#if defined(WIN32) && defined(__IBMC__)
# include <windows.h>
# pragma warning(default: 4115 4201 4214)
#else
# if defined(WIN32) && (defined(__WATCOMC__) || defined(__BORLANDC__) || defined(__MINGW32__))
# undef APIENTRY
# include <windows.h>
# else
# if defined(__EMX__) && defined(OS2)
# define DONT_TYPEDEF_PFN
# undef APIENTRY
# include <os2emx.h>
# else
# if defined(__WATCOMC__) && defined(OS2)
# undef APIENTRY
# define DONT_TYPEDEF_PFN
# include <os2.h>
# else
# if defined(_MSC_VER) && !defined(__WINS__)
# undef APIENTRY
# if _MSC_VER >= 1100
/* Stupid MSC can't compile own headers without warning at least in VC 5.0 */
# pragma warning(disable: 4115 4201 4214 4514)
# endif
# include <windows.h>
# if _MSC_VER >= 1100
# pragma warning(default: 4115 4201 4214)
# endif
# else
# define APIENTRY
# endif
# endif
# endif
# endif
#endif
#ifndef RXLIB /* need __regina_faked_main which is known with RXLIB only */
# define RXLIB
#endif
#include "rexx.h"
#ifdef HAVE_UNISTD_H
# include <unistd.h>
#endif
#include "rxiface.h"
#include <stdio.h>
#include <string.h>
#ifdef HAVE_ERRNO_H
#include <errno.h>
#endif
#ifdef HAVE_ASSERT_H
# include <assert.h>
#endif
#ifdef HAVE_STDARG_H
#include <stdarg.h>
#endif
#ifndef min
# define min(a,b) (((a) < (b)) ? (a) : (b))
#endif
static int ReMapHook( const tsd_t *TSD, int NetHook ) ;
typedef struct { /* cli_tsd: static variables of this module (thread-safe) */
char count_params_buf[32]; /* handle_no_of_params() */
/* Buffering of external parameters allows a delayed deletion in case of
* errors.
*/
char * ExternalName ;
int StringsCount ;
int * Lengths ; /* StringsCount + 1 elements */
char ** Strings ; /* StringsCount + 1 elements */
} cli_tsd_t; /* thread-specific but only needed by this module. see
* init_client
*/
/* init_client initializes the module.
* Currently, we set up the thread specific data.
* The function returns 1 on success, 0 if memory is short.
*/
int init_client( tsd_t *TSD )
{
cli_tsd_t *ct;
if ( TSD->cli_tsd != NULL )
return(1);
if ( ( TSD->cli_tsd = MallocTSD( sizeof(cli_tsd_t) ) ) == NULL )
return(0);
ct = (cli_tsd_t *)TSD->cli_tsd;
memset( ct, 0, sizeof(cli_tsd_t) );
ct->StringsCount = -1;
return(1);
}
/* wrapstring makes a streng from external (application) data. If you get
* an exception you may have a wild pointer in your application.
* Returns NULL if string==NULL or length<0.
*/
static streng *wrapstring( const tsd_t *TSD, const char *string, int length )
{
streng *result=NULL ;
if (length>=0 && string)
{
result = Str_makeTSD( length ) ;
memcpy( result->value, string, length ) ;
result->len = length ;
}
else
result = NULL ;
return result ;
}
static int map_type( int in )
{
if (in==RX_TYPE_COMMAND)
return INVO_COMMAND ;
else if (in==RX_TYPE_FUNCTION)
return INVO_FUNCTION ;
else
{
assert( in == RX_TYPE_SUBROUTINE ) ;
return INVO_SUBROUTINE ;
}
}
static paramboxptr parametrize( const tsd_t *TSD, int ArgCount, const int *ParLengths, const char **ParStrings )
{
paramboxptr parms=NULL, root=NULL ;
int count=0, i=0 ;
count = ArgCount ;
for (i=0; count--; i++ )
{
if (parms)
{
parms->next = (paramboxptr)MallocTSD( sizeof(parambox)) ;
parms = parms->next ;
}
else
parms = root = (paramboxptr)MallocTSD( sizeof(parambox )) ;
parms->value = wrapstring( TSD, ParStrings[i], ParLengths[i] ) ;
}
if (parms)
parms->next = NULL ;
return root ;
}
/*
* IfcPrepareReturnString will copy the content of src to the buffer described
* by the pair (*targetlen, *targetbuf). The target is not checked, but a
* value of RX_NO_STRING for *targetlen will be accepted.
*
* If src is a NULL pointer the targetlen will become 0 and targetbuf will
* become NULL.
* Otherwise the length of the target is checked if it can hold the entire
* source string PLUS one string termination character. The terminator won't
* be honoured in *targetlen.
* A new buffer will be allocated using IfcAllocateString on insufficient size,
* but the old one is not freed.
*
* This function is intended to be the opposite of wrapstring.
*/
static void IfcPrepareReturnString( const streng *src, int *targetlen,
char **targetbuf )
{
int len;
/*
* Check for an invalid source first.
*/
if ( ( src == NULL ) || ( Str_val( src ) == NULL ) )
{
*targetlen = 0;
*targetbuf = NULL;
return;
}
len = Str_len( src );
if ( *targetlen < len + 1 )
{
if ( ( *targetbuf = (char *)IfcAllocateMemory( len + 1 ) ) == NULL )
{
/*
* Better idea?
*/
*targetlen = 0;
return;
}
}
memcpy( *targetbuf, Str_val( src ), len );
(*targetbuf)[len] = '\0';
*targetlen = len;
}
/*
* ScriptSetup does the setup step of IfcExecScript.
* This function is part of the technique to bypass problems with
* setjmp/longjmp.
*/
static void ScriptSetup( tsd_t *TSD,
void **instore_buf, unsigned long *instore_length,
streng **command, const char *Name, int NameLen,
paramboxptr *params, int ArgCount,
const int *ParLengths, const char **ParStrings,
int *ctype, int CallType,
int restricted,
int *hooks, int ExitFlags,
streng **environment, int EnvLen, const char *EnvName )
{
int i;
char c;
streng *h;
*instore_buf = NULL;
*instore_length = 0;
*command = wrapstring( TSD, Name, NameLen );
TSD->systeminfo->input_file = *command;
assert( *command );
*params = parametrize( TSD, ArgCount, ParLengths, ParStrings );
*ctype = map_type( CallType );
TSD->restricted = restricted;
*hooks = 0;
for( i = 0; i < 30; i++ )
{
if ( ExitFlags & ( 1 << i ) )
*hooks |= 1 << ReMapHook( TSD, i );
}
*environment = wrapstring( TSD, EnvName, EnvLen );
if ( *environment == NULL )
{
/*
* We have to use the extension of the file. That is what the REXX API
* documentations says and we have been called by the API in this case!
*/
h = TSD->systeminfo->input_file;
for ( i = Str_len( h ) - 1; i >= 0; i-- )
{
c = Str_val( h )[i];
if ( c == '.' )
{
i++;
break;
}
else if ( strchr( FILE_SEPARATORS, c ) != NULL )
{
i = -1;
break;
}
}
/*
* i == -1: no suffix
* i otherwise: position after dot (may lead to empty string, too)
*/
if ( i == -1 )
i = Str_len( h );
*environment = Str_nodupTSD( h, i, Str_len( h ) - i );
}
/*
* When executing a script, check if the environment we are running under exists
* and has been "redirected" by a call to RexxRegisterSubcom???()
*/
if ( envir_exists( TSD, *environment ) )
{
if ( get_subcomed_envir( TSD, *environment ) )
{
add_envir( TSD, Str_dupTSD( *environment ), ENVIR_PIPE, 0 );
}
}
else
{
add_envir( TSD, Str_dupTSD( *environment ), ENVIR_PIPE, 0 );
}
}
/*
* ScriptCleanup does the cleanup step of IfcExecScript.
* 1) script_exit becomes the new old value for a jumped exit.
* 2) environment is deregistered and freed.
* 3) A fresh Ifc-allocated copy of result is put into RetLen/RetString,
* and result is freed. *RetString is either used or replaced.
* 4) InterpreterStatus is reset to the given value.
* This function is part of the technique to bypass problems with
* setjmp/longjmp.
*/
static void ScriptCleanup(tsd_t *TSD, jmp_buf *script_exit, streng *environment,
streng *result, int *RetLen, char **RetString,
unsigned *InterpreterStatus)
{
TSD->systeminfo->script_exit = script_exit;
del_envir( TSD, environment );
Free_stringTSD( environment );
RestoreInterpreterStatus( TSD, InterpreterStatus );
IfcPrepareReturnString( result, RetLen, RetString );
if ( result )
Free_stringTSD( result );
}
int IfcExecScript( tsd_t * volatile TSD, int NameLen, const char *Name,
int ArgCount, const int *ParLengths, const char **ParStrings,
int CallType, int ExitFlags, int EnvLen, const char *EnvName,
int SourceCode, int restricted,
const char *SourceString, unsigned long SourceStringLen,
const void *TinnedTree, unsigned long TinnedTreeLen,
int *RetLen, char **RetString, void **instore_buf,
unsigned long *instore_length )
{
streng * volatile result=NULL;
tsd_t * volatile saved_TSD;
jmp_buf * volatile old_exit_addr;
int volatile RetCode=0;
streng * volatile environment=NULL;
volatile int jumped=0;
jmp_buf exit_addr;
streng * command;
paramboxptr params;
int ctype,hooks,type;
unsigned InterpreterStatus[IPRT_BUFSIZE];
/*
* NOTE:
* setjmp and longjmp will clobber all variables not explicitely marked
* as volatile. The reason is the unexpected jump from anywhere to the
* code following the setjmp() call. Every assumption of the compiler
* about valid register variables are wrong. We have to remove all
* register variables set by the optimizer. This can be done either by
* using volatile, or by not using variables before the setjmp() INCLUDING
* initialization or by using non-inline functions for manipulating
* values.
* We use a combination here.
* If you ever need to change ANY line before the setjmp() code,
* double-check the compiler's chance to cache some variables in registers.
* Florian
*/
saved_TSD = TSD;
SaveInterpreterStatus( TSD, InterpreterStatus );
/* It may be that TSD->systeminfo->script_exit is not set. This may lead to
* an exit() call, e.g. at Rexx "EXIT". We set TSD->systeminfo->script_exit
* if it is not set. If a problem occurs we will be informed by a longjmp
* and we will not completely been killed by an exit(). Remember: This
* function is typically called if a program uses "us" as a subroutine.
* Exiting is very harmful in this case.
* Note: The memory allocated within called subsoutines will NOT be
* freed. We must change many things to do this. Maybe, it's a good
* idea to traverse all called subroutine trees and free the leaves.
* FGC
*/
if ( ( old_exit_addr = TSD->systeminfo->script_exit ) == NULL )
{
TSD->systeminfo->script_exit = &exit_addr;
assert( !TSD->in_protected );
if ( setjmp( *TSD->systeminfo->script_exit ) )
{
TSD = saved_TSD;
result = TSD->systeminfo->result;
TSD->systeminfo->result = NULL;
if ( !RetCode )
{
if ( result )
RetCode = atoi( result->value );
else
RetCode = -1;
}
result = NULL; /* result was a static buffer provided by exiterror */
jumped++;
}
}
if ( !jumped )
{
ScriptSetup( TSD,
instore_buf, instore_length,
&command, Name, NameLen,
¶ms, ArgCount, ParLengths, ParStrings,
&ctype, CallType,
restricted,
&hooks, ExitFlags,
(streng **) &environment, EnvLen, EnvName );
type = SourceCode ;
if ( type == RX_TYPE_EXTERNAL )
{
result = execute_external( TSD, command, params, environment,
(int *) &RetCode, hooks, ctype );
}
else if ( type == RX_TYPE_INSTORE )
{
result = do_instore( TSD, command, params, environment,
(int *) &RetCode, hooks,
TinnedTree, TinnedTreeLen,
SourceString, SourceStringLen, NULL, ctype );
}
else if ( type == RX_TYPE_MACRO )
result = nullstringptr();
else if ( type == RX_TYPE_SOURCE )
{
streng *SrcStr = wrapstring( TSD, SourceString, SourceStringLen );
internal_parser_type ipt;
/*
* Fix for Bug #436. Enable system exit to trap parsing errors
*/
TSD->systeminfo->hooks = hooks;
ipt = enter_macro( TSD, SrcStr, instore_buf, instore_length ) ;
if ( ( CallType == RX_TYPE_COMMAND )
&& ArgCount
&& ( *ParStrings != NULL )
&& ( *ParLengths == 3 )
&& ( memcmp( "//T", *ParStrings, 3 ) == 0 ) )
; /* request for tokenisation only, don't execute */
else
{
ipt.kill = SrcStr;
result = do_instore( TSD, command, params, environment,
(int *) &RetCode, hooks, NULL,0, NULL,0, &ipt,
ctype);
/* do_instore already has deleted the internal structure */
}
}
else
{
exiterror( ERR_INTERPRETER_FAILURE, 1, __FILE__, __LINE__, "" );
return 0;
}
}
ScriptCleanup( TSD, old_exit_addr, environment, result, RetLen, RetString,
InterpreterStatus );
return RetCode;
}
int IfcExecCallBack( tsd_t * volatile TSD, int NameLen, const char *Name,
int ArgCount, const int *ParLengths, const char **ParStrings,
int *RetLen, char **RetString )
{
nodeptr node;
paramboxptr args;
streng *result;
streng *name;
/*
* If we can't find the label, no point in continuing.
*/
name = Str_ncreTSD( Name, NameLen );
if ( ( node = getlabel( TSD, name ) ) == NULL )
{
FreeTSD( name );
return RX_CODE_NOSUCH;
}
FreeTSD( name );
if ( node->u.trace_only )
{
FreeTSD( name );
return RX_CODE_NOSUCH;
}
/*
* Fixes bug 772199
*/
args = initargs( TSD, ArgCount, ParLengths, ParStrings );
result = CallInternalFunction( TSD, node, TSD->currentnode, args );
IfcPrepareReturnString( result, RetLen, RetString );
if ( result )
Free_stringTSD( result );
return 0;
}
static int handle_source( const tsd_t *TSD, int *Length, char **String,
int *allocated )
{
int infile=0, total=0, invoked=0 ;
const char *stype=NULL ;
char *ctmp=NULL ;
int sleng=0 ;
stype = system_type() ;
sleng = strlen( stype ) ;
infile = TSD->systeminfo->input_file->len ;
invoked = strlen(invo_strings[TSD->systeminfo->invoked]) ;
total = sleng + 1 + invoked + 1 + infile ;
ctmp = *String = (char *)MallocTSD( (*Length=total)+2 ) ;
sprintf( ctmp, "%s %s ", stype, invo_strings[TSD->systeminfo->invoked]) ;
strncat( ctmp, TSD->systeminfo->input_file->value, infile ) ;
*allocated = 1;
return RX_CODE_OK ;
}
static int handle_param( tsd_t *TSD, int *Length, char **String )
{
paramboxptr ptr=NULL ;
streng *value=NULL ;
int number=0 ;
ptr = TSD->systeminfo->currlevel0->args ;
value = wrapstring( TSD, *String, *Length ) ;
number = atopos( TSD, value, "internal", 1 ) ;
Free_stringTSD( value ) ;
value = get_parameter( ptr, number ) ;
if (value)
{
*(Length+1) = value->len ;
*(String+1) = value->value ;
}
else
*(Length+1) = RX_NO_STRING ;
return RX_CODE_OK ;
}
static int handle_no_of_params( const tsd_t *TSD, int *Length, char **String )
{
paramboxptr ptr=NULL ;
int count=0 ;
cli_tsd_t *ct;
ct = (cli_tsd_t *)TSD->cli_tsd;
ptr = TSD->systeminfo->currlevel0->args ;
count = count_params( ptr, PARAM_TYPE_HARD ) ;
sprintf( ct->count_params_buf, "%d", count ) ;
*String = ct->count_params_buf;
*Length = strlen(*String) ;
return RX_CODE_OK ;
}
static int get_next_var( tsd_t *TSD, int *Lengths, char **Strings,
int *allocated )
{
variableptr value=NULL, rval=NULL, rrval=NULL ;
int l;
*allocated = 0;
if (TSD->var_indicator==0)
{
get_next_variable( TSD, 1 ) ;
TSD->var_indicator = 1 ;
}
for (;;)
{
value = get_next_variable( TSD, 0 ) ;
for (rval=value; rval && rval->realbox; rval=rval->realbox)
{
;
}
if (rval && !(rval->flag & VFLAG_STR))
{
if (rval->flag & VFLAG_NUM)
{
expand_to_str( TSD, rval ) ;
break ;
}
if (!rval->stem)
continue ;
for (rrval=rval->stem; rrval && rrval->realbox; rrval=rrval->realbox)
{
;
}
if (rrval && !(rrval->flag & VFLAG_STR))
{
if (rval->flag & VFLAG_NUM)
{
expand_to_str( TSD, rval ) ;
break ;
}
else
continue ;
}
}
break ;
}
if (rval)
{
if (rval->stem)
{
*allocated |= 1;
l = Lengths[0] = rval->stem->name->len + rval->name->len ;
Strings[0] = (char *)MallocTSD( (l < 1) ? 1 : l ) ;
memcpy(Strings[0], rval->stem->name->value, rval->stem->name->len);
memcpy(Strings[0]+rval->stem->name->len,
rval->name->value, rval->name->len ) ;
}
else
{
Lengths[0] = rval->name->len ;
Strings[0] = rval->name->value ;
}
if (rval->value)
{
Lengths[1] = rval->value->len ;
Strings[1] = rval->value->value ;
}
else
{
*allocated |= 2;
assert( rval->stem && rrval->value ) ;
l = Lengths[1] = rval->stem->name->len + rval->name->len ;
Strings[1] = (char *)MallocTSD( (l < 1) ? 1 : l ) ;
memcpy( Strings[1], rval->stem->name->value, value->stem->name->len );
memcpy( Strings[1]+value->stem->name->len,
rval->name->value, rval->name->len ) ;
}
return 2 ;
}
else
{
/*
* Once we have reached the end of all variables, reset var_indicator
* so next time we can start from the beginning again.
*/
TSD->var_indicator = 0 ;
return 0 ;
}
}
static int MapHook( const tsd_t *TSD, int RexxHook )
{
switch ( RexxHook )
{
case HOOK_STDOUT: return RX_EXIT_STDOUT ;
case HOOK_STDERR: return RX_EXIT_STDERR ;
case HOOK_TRCIN: return RX_EXIT_TRCIN ;
case HOOK_PULL: return RX_EXIT_PULL ;
case HOOK_INIT: return RX_EXIT_INIT ;
case HOOK_TERMIN: return RX_EXIT_TERMIN ;
case HOOK_SUBCOM: return RX_EXIT_SUBCOM ;
case HOOK_GETENV: return RX_EXIT_GETENV ;
case HOOK_SETENV: return RX_EXIT_SETENV ;
case HOOK_GETCWD: return RX_EXIT_GETCWD ;
case HOOK_SETCWD: return RX_EXIT_SETCWD ;
default:
exiterror( ERR_INTERPRETER_FAILURE, 1, __FILE__, __LINE__, "" );
}
return 0 ;
}
static int ReMapHook( const tsd_t *TSD, int NetHook )
{
switch ( NetHook )
{
case RX_EXIT_STDOUT: return HOOK_STDOUT ;
case RX_EXIT_STDERR: return HOOK_STDERR ;
case RX_EXIT_TRCIN: return HOOK_TRCIN ;
case RX_EXIT_PULL: return HOOK_PULL ;
case RX_EXIT_TERMIN: return HOOK_TERMIN ;
case RX_EXIT_INIT: return HOOK_INIT ;
case RX_EXIT_SUBCOM: return HOOK_SUBCOM ;
case RX_EXIT_FUNC: return HOOK_FUNC ;
case RX_EXIT_GETENV: return HOOK_GETENV ;
case RX_EXIT_SETENV: return HOOK_SETENV ;
case RX_EXIT_GETCWD: return HOOK_GETCWD ;
case RX_EXIT_SETCWD: return HOOK_SETCWD ;
default:
exiterror( ERR_INTERPRETER_FAILURE, 1, __FILE__, __LINE__, "" );
}
return 0 ;
}
int hookup( tsd_t *TSD, int hook )
{
int rcode=0, code=0;
code = MapHook ( TSD, hook );
assert (code == RX_EXIT_INIT || code == RX_EXIT_TERMIN );
rcode = IfcDoExit( TSD, code, 0, NULL, 0, NULL, NULL, NULL ) ;
if (rcode==RX_HOOK_ERROR)
exiterror( ERR_SYSTEM_FAILURE, 0 ) ;
else if (rcode==RX_HOOK_GO_ON)
rcode = HOOK_GO_ON ;
else if (rcode==RX_HOOK_NOPE)
rcode = HOOK_NOPE ;
else
exiterror( ERR_INTERPRETER_FAILURE, 1, __FILE__, __LINE__, "" ) ;
return rcode ;
}
int hookup_output( tsd_t *TSD, int hook, const streng *outdata )
{
int rcode=0, code=0 ;
char *str;
int len = 0;
code = MapHook( TSD, hook );
/*
* Another level of checking to see if we have an exit handler
* This probably should be added to hookup_input etc
*/
if ( !IfcExitHandlerExists( TSD, code ) )
return HOOK_GO_ON;
if (outdata)
{
str = str_of( TSD, outdata ) ;
len = outdata->len ;
}
else
{
str = (char *)MallocTSD( 1 ) ;
str[0] = '\0' ;
len = 0 ;
}
rcode = IfcDoExit( TSD, code, len, str, 0, NULL, NULL, NULL) ;
FreeTSD( str ) ;
if (rcode==RX_HOOK_ERROR)
exiterror( ERR_SYSTEM_FAILURE, 0 ) ;
else if (rcode==RX_HOOK_GO_ON)
rcode = HOOK_GO_ON ;
else if (rcode==RX_HOOK_NOPE)
rcode = HOOK_NOPE ;
else
exiterror( ERR_INTERPRETER_FAILURE, 1, __FILE__, __LINE__, "" ) ;
return rcode ;
}
int hookup_output2( tsd_t *TSD, int hook, const streng *outdata1, const streng *outdata2 )
{
int rcode=0, code=0 ;
char *str1, *str2;
int len1 = 0, len2 = 0;
code = MapHook( TSD, hook );
/* assert (code == RX_EXIT_SETENV ); */
if (outdata1)
{
str1 = str_of( TSD, outdata1 ) ;
len1 = outdata1->len ;
}
else
{
str1 = (char *)MallocTSD( 1 ) ;
str1[0] = '\0' ;
len1 = 0 ;
}
if (outdata2)
{
str2 = str_of( TSD, outdata2 ) ;
len2 = outdata2->len ;
}
else
{
str2 = (char *)MallocTSD( 1 ) ;
str2[0] = '\0' ;
len2 = 0 ;
}
rcode = IfcDoExit( TSD, code, len1, str1, len2, str2, NULL, NULL) ;
FreeTSD( str1 ) ;
FreeTSD( str2 ) ;
if (rcode==RX_HOOK_ERROR)
exiterror( ERR_SYSTEM_FAILURE, 0 ) ;
else if (rcode==RX_HOOK_GO_ON)
rcode = HOOK_GO_ON ;
else if (rcode==RX_HOOK_NOPE)
rcode = HOOK_NOPE ;
else
exiterror( ERR_INTERPRETER_FAILURE, 1, __FILE__, __LINE__, "" ) ;
return rcode ;
}
int hookup_input( tsd_t *TSD, int hook, streng **indata )
{
int rcode=0, code=0 ;
/* The following value allows called programs to call "free" to the return
* parameters without destroying our stack.
*/
#define ILLEGAL_USE_SIZE (8 * sizeof(void *))
char RetBuf[ILLEGAL_USE_SIZE + 256] ;
int retlen=256 ;
char *retstr=RetBuf;
code = MapHook( TSD, hook );
/* assert (code == RX_EXIT_PULL || code == RX_EXIT_TRCIN ); */
strcpy(RetBuf,"");
/* FIXME, FGC: The documentation says that the input of a PULL or TRCIN is
* undefined. Why do we provide a buffer?
*/
rcode = IfcDoExit( TSD, code, 0, NULL, 0, NULL, &retlen, &retstr ) ;
if (rcode==RX_HOOK_ERROR)
exiterror( ERR_SYSTEM_FAILURE, 0 ) ;
else if (rcode==RX_HOOK_GO_ON)
rcode = HOOK_GO_ON ;
else if (rcode==RX_HOOK_NOPE)
rcode = HOOK_NOPE ;
else
exiterror( ERR_INTERPRETER_FAILURE, 1, __FILE__, __LINE__, "" ) ;
*indata = wrapstring( TSD, retstr, retlen ) ;
FreeTSD( retstr ) ; /* retstr was always newly allocated */
#undef ILLEGAL_USE_SIZE
return rcode ;
}
int hookup_input_output( tsd_t *TSD, int hook, const streng *outdata, streng **indata )
{
char *str;
int len = 0;
int rcode=0, code=0 ;
/* The following value allows called programs to call "free" to the return
* parameters without destroying our stack.
*/
#define ILLEGAL_USE_SIZE (8 * sizeof(void *))
char RetBuf[ILLEGAL_USE_SIZE + 256] ;
int retlen=256 ;
char *retstr=RetBuf;
code = MapHook( TSD, hook );
/* assert (code == RX_EXIT_GETENV );*/
if (outdata)
{
str = str_of( TSD, outdata ) ;
len = outdata->len ;
}
else
{
str = (char *)MallocTSD( 1 ) ;
str[0] = '\0' ;
len = 0 ;
}
strcpy(RetBuf,"");
/* FIXME, FGC: The documentation says that the input of a PULL or TRCIN is
* undefined. Why do we provide a buffer?
*/
rcode = IfcDoExit( TSD, code, len, str, 0, NULL, &retlen, &retstr ) ;
FreeTSD( str ) ;
if (rcode==RX_HOOK_ERROR)
exiterror( ERR_SYSTEM_FAILURE, 0 ) ;
else if (rcode==RX_HOOK_GO_ON)
rcode = HOOK_GO_ON ;
else if (rcode==RX_HOOK_NOPE)
rcode = HOOK_NOPE ;
else
exiterror( ERR_INTERPRETER_FAILURE, 1, __FILE__, __LINE__, "" ) ;
*indata = wrapstring( TSD, retstr, retlen ) ;
FreeTSD( retstr ) ; /* retstr was always newly allocated */
#undef ILLEGAL_USE_SIZE
return rcode ;
}
streng *SubCom( tsd_t *TSD, const streng *command, const streng *envir, int *rc )
{
int tmplen ;
char *tmpptr ;
streng *retval ;
*rc = IfcSubCmd( TSD,
envir ? envir->len : RX_NO_STRING,
envir ? envir->value : NULL,
command->len, command->value, &tmplen, &tmpptr ) ;
retval = wrapstring( TSD, tmpptr, tmplen ) ;
FreeTSD( tmpptr ) ;
return retval ;
}
/****************************************************************************
*
* JH 13/12/1999 Trying to satisfy both BUG031 and BUG022.
*
* BUG022 To make Direct setting of stems Direct and not Symbolic.
* - Added new parameter, "Code". Assumed values are RX_GETSVAR, and
* RX_GETVAR. They denote that the actiion is symbolic, or direct
* (respectively).
* - if direct call getdirvalue()
*
* BUG031
* - if default value is being returned, uppercase the whole name for
* symbolics, and only the stem for directs. This should be a moot
* issue, as there is code in variable.c to return default values.
*
****************************************************************************/
static int GetVariable( tsd_t *TSD, int Code, int *Lengths, char *Strings[],
int *allocated)
{
const streng *value;
streng *varbl;
char *retval;
int i,len,state;
varbl = wrapstring( TSD, Strings[0], Lengths[0] );
if ( !varbl )
{
Lengths[1] = RX_NO_STRING;
return RX_CODE_INVNAME;
}
if ( !valid_var_symbol( varbl ) )
{
Free_stringTSD( varbl );
Lengths[1] = RX_NO_STRING;
return RX_CODE_INVNAME;
}
state = variables_per_SAA( TSD );
if ( Code == RX_GETSVAR )
value = getvalue( TSD, varbl, -1 );
else
value = getdirvalue( TSD, varbl );
restore_variable_state( TSD, state );
/*
* getvalue returns varbl or a temporary value on NOVALUE, don't free varbl
* until the final use of value and varbl.
*/
if ( var_was_found( TSD ) )
{
Lengths[1] = value->len;
Strings[1] = (char *) value->value;
*allocated = 0;
Free_stringTSD( varbl );
return RX_CODE_OK;
}
Lengths[1] = len = value->len;
Strings[1] = retval = (char *)MallocTSD( len );
memcpy( retval, value->value, len );
*allocated = 2;