/*
* GCI_Dispatcher is the entry point of all GCI registered functions by the
* user.
*
* The function's arguments and return value depend on its usage from case
* to case.
*/
int GCI_Dispatcher( tsd_t *TSD,
PFN func,
void *treeinfo,
int Params,
const PRXSTRING params,
PRXSTRING retstr )
{
GCI_result rc;
GCI_str disposition, direct_retval;
GCI_str args[GCI_REXX_ARGS];
int i, retval;
/*
* This trivial test should come first to be sure not to access nonexisting
* memory. parseTree has fixed this number.
*/
if ( Params > GCI_REXX_ARGS )
GCIcode2ReginaFuncCode( TSD, GCI_InternalError, NULL, 1 );
memset( args, 0, sizeof( args ) );
for ( i = 0; i < Params; i++ )
GCI_migrateRxString( &args[i], ¶ms[i] );
memset( &disposition, 0, sizeof( disposition ) );
memset( &direct_retval, 0, sizeof( direct_retval ) );
rc = GCI_execute( TSD,
(void (*)()) func,
(const GCI_treeinfo *) treeinfo,
Params,
args,
&disposition,
&direct_retval,
TSD->gci_prefix );
if ( rc != GCI_OK )
{
GCI_strfree( TSD, &direct_retval ); /* not really needed hopefully */
GCIcode2ReginaFuncCode( TSD, rc, &disposition, 1 );
}
retval = assignRxString( TSD, retstr, &direct_retval );
GCI_strfree( TSD, &direct_retval );
if ( retval )
exiterror( ERR_STORAGE_EXHAUSTED, 0 );
return 0;
}
/*
* Returns the translated function code from GCI_result to the code that
* Regina shall return to the caller.
* This function set the textual representation of an error code to that value
* that will be accessed by RxFuncErrMsg() and sets the variable GCI_RC to
* that value, too.
*
* dispo is either NULL (or the content is NULL) or contains the position of
* the error within the structure. dispo's content will be deallocated.
*/
static int GCIcode2ReginaFuncCode( tsd_t *TSD,
GCI_result rc,
GCI_str *dispo,
int forceError )
{
GCI_str description, fullinfo, *fi = NULL, *out;
volatile char *tmpDispo, *tmpFull = NULL, *tmpBest;
streng *h;
char GCI_RC[7];
GCI_strOfCharBuffer(GCI_RC);
GCI_strcats( &str_GCI_RC, "GCI_RC" );
GCI_describe( &description, rc );
if ( ( dispo != NULL ) && ( GCI_content( dispo ) == NULL ) )
dispo = NULL;
if ( ( dispo != NULL ) && ( rc != GCI_OK ) )
{
if ( GCI_stralloc( TSD, &fullinfo, GCI_strlen( dispo ) +
GCI_strlen( &description ) +
3 ) == GCI_OK )
{
fi = &fullinfo;
GCI_strcpy( fi, &description );
GCI_strcats( fi, ": " );
GCI_strcat( fi, dispo );
}
}
out = ( fi != NULL ) ? fi : &description;
GCI_writeRexx( TSD, &str_GCI_RC, out, 0 );
if ( ( rc == GCI_OK ) && !forceError )
{
if ( dispo != NULL )
GCI_strfree( TSD, dispo );
if ( fi != NULL )
GCI_strfree( TSD, fi );
return 0;
}
h = streng_of( TSD, &description );
tmpDispo = tmpstr_of( TSD, h );
Free_stringTSD( h );
if ( fi != NULL )
{
h = streng_of( TSD, fi );
tmpFull = tmpstr_of( TSD, h );
Free_stringTSD( h );
}
if ( dispo != NULL )
GCI_strfree( TSD, dispo );
if ( fi != NULL )
GCI_strfree( TSD, fi );
/*
* We have two temporary strings describing the error condition.
* All stuff we have to deallocate is deallocated. Let's go.
*/
tmpBest = ( tmpFull != NULL ) ? tmpFull : tmpDispo;
set_err_message( TSD, (char *) tmpBest, "" );
switch ( rc )
{
case GCI_NoMemory:
exiterror( ERR_STORAGE_EXHAUSTED, 0 );
case GCI_WrongInput:
exiterror( ERR_INCORRECT_CALL, 980, ( tmpDispo ) ? ": " : "", ( tmpDispo ) ? tmpDispo : "" );
case GCI_NumberRange:
exiterror( ERR_INCORRECT_CALL, 981, ( tmpDispo ) ? ": " : "", ( tmpDispo ) ? tmpDispo : "" );
case GCI_StringRange:
exiterror( ERR_INCORRECT_CALL, 982, ( tmpDispo ) ? ": " : "", ( tmpDispo ) ? tmpDispo : "" );
case GCI_UnsupportedType:
if ( !forceError )
return 71; /* RXFUNC_BADTYPE + 1 */
exiterror( ERR_INCORRECT_CALL, 983, ( tmpDispo ) ? ": " : "", ( tmpDispo ) ? tmpDispo : "" );
case GCI_UnsupportedNumber:
exiterror( ERR_INCORRECT_CALL, 984, ( tmpDispo ) ? ": " : "", ( tmpDispo ) ? tmpDispo : "" );
case GCI_BufferTooSmall:
exiterror( ERR_INCORRECT_CALL, 985, ( tmpDispo ) ? ": " : "", ( tmpDispo ) ? tmpDispo : "" );
case GCI_MissingName:
exiterror( ERR_INCORRECT_CALL, 986, ( tmpDispo ) ? ": " : "", ( tmpDispo ) ? tmpDispo : "" );
case GCI_MissingValue:
exiterror( ERR_INCORRECT_CALL, 987, ( tmpDispo ) ? ": " : "", ( tmpDispo ) ? tmpDispo : "" );
case GCI_IllegalName:
exiterror( ERR_INCORRECT_CALL, 988, ( tmpDispo ) ? ": " : "", ( tmpDispo ) ? tmpDispo : "" );
case GCI_RexxError:
exiterror( ERR_INCORRECT_CALL, 989, ( tmpDispo ) ? ": " : "", ( tmpDispo ) ? tmpDispo : "" );
case GCI_NoBaseType:
exiterror( ERR_INCORRECT_CALL, 990, ( tmpDispo ) ? ": " : "", ( tmpDispo ) ? tmpDispo : "" );
case GCI_SyntaxError:
exiterror( ERR_INCORRECT_CALL, 991, ( tmpDispo ) ? ": " : "", ( tmpDispo ) ? tmpDispo : "" );
case GCI_ArgStackOverflow:
exiterror( ERR_INCORRECT_CALL, 992, ( tmpDispo ) ? ": " : "", ( tmpDispo ) ? tmpDispo : "" );
case GCI_NestingOverflow:
exiterror( ERR_INCORRECT_CALL, 993, ( tmpDispo ) ? ": " : "", ( tmpDispo ) ? tmpDispo : "" );
default:
break;
}
exiterror( ERR_INTERPRETER_FAILURE, 1, __FILE__, __LINE__, tmpBest );
return 0; /* Keep the compiler happy */
}
/*
* parse is the local implementation of GCI_parsetree below. Most parameters
* are in *cb. Have a look at callblock at top of file or at GCI_parsestring
* below.
* itemnumber is the iterator of the container item or array item, the later
* always has number 1.
*
* The function loops over a type structure tree, the current node name is
* placed in cb->buffer. We do a depth-first iteration.
*
* Indirect array[x] are replaced by a combination of
* indirect container[1], array[x]. This allows a better addressing later.
* The indirect container is flagged as "generated" in this case.
*
* THE GENERATED TYPES MAY HAVE ILLEGAL BIT SIZES. IT ISN'T CHECKED ALWAYS!
*
* Return values:
* GCI_OK: Everything is fine.
*
* In case of an error cb->buffer will contain the
* variable's name where the problem raises first.
*
* GCI_MissingName: A variable's name isn't set. This is the equivalence
* for GCI_MissingValue in the type parsing step. The
* system may or may not raise a NOVALUE condition instead
* depending on the implementation.
* GCI_BufferTooSmall: The variable's name buffer cb->buffer can't hold the
* complete variable's name or the type string exceeds
* 256 byte.
* GCI_IllegalName: The variables name in cb->buffer is illegal in terms of
* Rexx. In general, the basename of GCI_paretree is
* wrong.
* GCI_RexxError: An unexpected error is returned by the interpreter
* while trying to access Rexx variables.
* GCI_UnsupportedType: Wrong type of input, e.g. FLOAT31 or the empty string
* in a type description string. Another reason is an
* internal error since the default sizes for "unsigned"
* and "integer" are not supported.
* GCI_WrongInput: Strange characters occur in the input string as the
* bit size of the type.
* GCI_NumberRange: Number to small or big to fit into the desired type
* with the desired destbyte-size. This applies to the
* element count of an "ARRAY" or "CONTAINER" type size
* or the bit size of the plain type.
* GCI_NoBaseType: The type won't fit the requirements for basic types.
*
* And there are numerous other possible errors returned by cb->callback.
*/
static GCI_result parse( callblock *cb,
int itemnumber )
{
GCI_parseinfo pi;
GCI_str newName;
static const GCI_parseinfo indirectArray = { GCI_container, 1, 1, 1 };
GCI_result rc;
unsigned i;
int origlen = GCI_strlen( cb->buffer );
GCI_strfromascii( &newName, NULL, 0 );
GCI_strcats( cb->buffer, "." );
GCI_strcats( cb->buffer, cb->prefixChar );
if ( ( rc = GCI_strcats( cb->buffer, "TYPE" ) ) != GCI_OK )
return rc;
if ( ( rc = GCI_readRexx( cb->hidden,
cb->buffer,
&cb->tempbuf,
0,
1,
NULL ) ) != GCI_OK )
{
if ( rc == GCI_MissingValue )
rc = GCI_MissingName;
return rc;
}
GCI_uppercase( cb->hidden, &cb->tempbuf );
if ( ( rc = decode( cb->hidden, &cb->tempbuf, &pi, cb->depth, &newName ) )
!= GCI_OK )
return rc;
GCI_strsetlen( cb->buffer, origlen );
if ( GCI_content( &newName ) != NULL ) {
if (cb->recurCount++ >= 100) {
GCI_strfree( cb->hidden, &newName );
return GCI_NestingOverflow;
}
GCI_strswap( &newName, cb->buffer );
origlen = GCI_strlen( cb->buffer );
}
/*
* Alright, we have it, but we have to fetch the number of elements
* if we parse a container or an array.
*/
if ( ( pi.type == GCI_container ) || ( pi.type == GCI_array ) )
{
if ( ( rc = GCI_strcats( cb->buffer, ".0" ) ) != GCI_OK )
{
/*
* The tmp buffer persists for error displaying, kill the other.
*/
if ( GCI_content( &newName ) != NULL )
GCI_strfree( cb->hidden, &newName );
return rc;
}
if ( ( rc = GCI_readRexx( cb->hidden,
cb->buffer,
&cb->tempbuf,
0,
1,
NULL ) ) != GCI_OK )
{
if ( rc == GCI_MissingValue )
rc = GCI_MissingName;
/*
* The tmp buffer persists for error displaying, kill the other.
*/
if ( GCI_content( &newName ) != NULL )
GCI_strfree( cb->hidden, &newName );
return rc;
}
/*
* The result shall be a whole, positive number. Lets see...
*/
if ( ( rc = GCI_string2bin( cb->hidden,
GCI_content( &cb->tempbuf ),
GCI_strlen( &cb->tempbuf ),
&pi.size,
sizeof( pi.size ),
GCI_unsigned ) ) != GCI_OK )
{
/*
* The tmp buffer persists for error displaying, kill the other.
*/
if ( GCI_content( &newName ) != NULL )
GCI_strfree( cb->hidden, &newName );
return rc;
}
if ( pi.size == 0 )
{
/*
* The tmp buffer persists for error displaying, kill the other.
*/
if ( GCI_content( &newName ) != NULL )
GCI_strfree( cb->hidden, &newName );
return GCI_NumberRange;
}
GCI_strsetlen( cb->buffer, origlen );
}
if ( pi.indirect && ( pi.type == GCI_array ) )
{
if ( ( rc = cb->callback( cb->depth,
itemnumber,
cb->arg,
&indirectArray) ) != GCI_OK )
return rc;
pi.indirect = 0;
if ( ( rc = cb->callback( cb->depth,
itemnumber,
cb->arg,
&pi) ) != GCI_OK )
return rc;
pi.indirect = 1;
}
else
{
if ( ( rc = cb->callback( cb->depth,
itemnumber,
cb->arg,
&pi) ) != GCI_OK )
{
/*
* The tmp buffer persists for error displaying, kill the other.
*/
if ( GCI_content( &newName ) != NULL )
GCI_strfree( cb->hidden, &newName );
return rc;
}
}
if ( ( pi.type != GCI_container ) && ( pi.type != GCI_array ) )
return GCI_OK;
cb->depth++;
for ( i = 0; i < pi.size; i++ )
{
sprintf( cb->helper, ".%u", i + 1 );
if ( ( rc = GCI_strcats( cb->buffer, cb->helper ) ) != GCI_OK )
{
/*
* The tmp buffer persists for error displaying, kill the other.
*/
if ( GCI_content( &newName ) != NULL )
GCI_strfree( cb->hidden, &newName );
return rc;
}
if ( ( rc = parse( cb, i ) ) != GCI_OK )
{
/*
* The tmp buffer persists for error displaying, kill the other.
*/
if ( GCI_content( &newName ) != NULL )
GCI_strfree( cb->hidden, &newName );
return rc;
}
GCI_strsetlen( cb->buffer, origlen );
if ( pi.type == GCI_array )
break;
}
cb->depth--;
cb->recurCount--;
if ( GCI_content( &newName ) != NULL )
{
GCI_strswap( &newName, cb->buffer );
GCI_strfree( cb->hidden, &newName );
}
if ( pi.indirect && ( pi.type == GCI_array ) )
{
pi.indirect = 0;
if ( ( rc = cb->callback( cb->depth, -1, cb->arg, &pi) ) != GCI_OK )
return rc;
return cb->callback( cb->depth, -1, cb->arg, &indirectArray );
}
return cb->callback( cb->depth, -1, cb->arg, &pi );
}
/*
* decode decodes one line of the type structure named str into the
* a parseinfo block called pi. depth is the current depth which may be 0.
*
* newName is set in case of ARRAY (to the empty string) or CONTAINER. In this
* case is set to the LIKE parameter or to the empty string.
*
* Leading and trailing spaces are ignored completely, "INDIRECTFLOAT32" is
* acceptable. Differences in case are ignored.
*
* THE GENERATED TYPE MAY HAVE AN ILLEGAL BIT SIZE. IT ISN'T CHECKED ALWAYS!
*
* Return values:
* GCI_OK: Line understood, *pi filled.
* GCI_UnsupportedType: Wrong type of input, e.g. FLOAT31 or the empty string.
* GCI_NoBaseType: The type won't fit the requirements for basic types.
*/
static GCI_result decode( void *hidden,
const GCI_str *str,
GCI_parseinfo *pi,
int depth,
GCI_str *newName )
{
const char *ptr = GCI_ccontent( str );
int size = GCI_strlen( str );
/*
* Chop off leading and trailing spaces. We really need it.
*/
while ( ( size > 0 ) && GCI_isspace( *ptr ) )
{
ptr++;
size--;
}
while ( ( size > 0 ) && GCI_isspace( ptr[size - 1] ) )
size--;
memset( pi, 0, sizeof( GCI_parseinfo ) );
if ( ( pi->type = checkname( &ptr, &size ) ) == GCI_unknown )
return GCI_UnsupportedType;
if ( pi->type == GCI_indirect )
{
while ( ( size > 0 ) && GCI_isspace( *ptr ) )
{
ptr++;
size--;
}
pi->type = checkname( &ptr, &size );
if ( ( pi->type == GCI_unknown ) || ( pi->type == GCI_indirect ) )
return GCI_UnsupportedType;
pi->indirect = 1;
}
else
pi->indirect = 0;
/*
* Check for a size operand.
*/
while ( ( size > 0 ) && GCI_isspace( *ptr ) )
{
ptr++;
size--;
}
/*
* We may have a size operand only if not an array or container is
* processed!
* This implementation shall support plain types like "INTEGER" without
* any bit size.
*/
switch ( pi->type )
{
case GCI_container:
if ( size > 0 )
{
GCI_str tmp;
if ( checkname( &ptr, &size ) != GCI_like )
return GCI_UnsupportedType;
while ( ( size > 0 ) && GCI_isspace( *ptr ) )
{
ptr++;
size--;
}
if ( size == 0 )
{
/*
* Single "like" after "container".
*/
return GCI_UnsupportedType;
}
while ( GCI_isspace( ptr[size - 1] ) )
size--;
/*
* Cut off a final dot, we append one later.
*/
if ( ptr[size - 1] == '.' )
{
/*
* Check for single "." as stem.
*/
if ( --size == 0 )
return GCI_UnsupportedType;
}
if ( GCI_stralloc( hidden, newName, size + 256 ) != GCI_OK )
return GCI_NoMemory;
GCI_strfromascii( &tmp, (char *) ptr, size );
GCI_strsetlen( &tmp, size );
GCI_strcpy( newName, &tmp );
size = 0;
}
/* fall through */
case GCI_array:
if ( size > 0 )
return GCI_UnsupportedType;
if ( ( depth == 0 ) && !pi->indirect )
{
if ( GCI_content( newName ) != NULL )
GCI_strfree( hidden, newName );
return GCI_NoBaseType;
}
pi->size = 0;
return GCI_OK;
case GCI_integer:
if ( size == 0 )
pi->size = 8 * sizeof( int );
break;
case GCI_unsigned:
if ( size == 0 )
pi->size = 8 * sizeof( unsigned );
break;
case GCI_float:
if ( size == 0 )
pi->size = 8 * sizeof( double ); /* surprised? */
break;
case GCI_char:
if ( size == 0 )
pi->size = 8 * 1; /* always, even in unicode or utf8 systems */
break;
case GCI_string:
if ( size == 0 ) /* length must be supplied */
return GCI_UnsupportedType;
break;
// JLF needed for portability: aliases which depend on the system & bitness.
// Each alias defines a type and a size, no size accepted after these aliases.
case GCI_long:
if ( size > 0 )
return GCI_UnsupportedType;
pi->type = GCI_integer;
pi->size = 8 * sizeof( long );
break;
case GCI_llong:
if ( size > 0 )
return GCI_UnsupportedType;
pi->type = GCI_integer;
pi->size = 8 * sizeof( long long );
break;
case GCI_pointer: // opaque
if ( size > 0 )
return GCI_UnsupportedType;
pi->type = GCI_unsigned;
pi->size = 8 * sizeof( void* );
break;
case GCI_size_t:
if ( size > 0 )
return GCI_UnsupportedType;
pi->type = GCI_unsigned;
pi->size = 8 * sizeof( size_t );
break;
case GCI_ssize_t:
if ( size > 0 )
return GCI_UnsupportedType;
pi->type = GCI_integer;
pi->size = 8 * sizeof( ssize_t );
break;
case GCI_ulong:
if ( size > 0 )
return GCI_UnsupportedType;
pi->type = GCI_unsigned;
pi->size = 8 * sizeof( unsigned long );
break;
case GCI_ullong:
if ( size > 0 )
return GCI_UnsupportedType;
pi->type = GCI_unsigned;
pi->size = 8 * sizeof( unsigned long long );
break;
default:
return GCI_UnsupportedType;
}
if ( size > 0 )
{
if ( GCI_string2bin( hidden,
ptr,
size,
&pi->size,
sizeof( pi->size ),
GCI_unsigned ) != GCI_OK )
return GCI_UnsupportedType;
}
if ( ( pi->type == GCI_string ) && ( pi->size > 0 ) )
return GCI_OK;
/*
* A byte has 8 bit, always! We don't support PDP10.
*/
if ( pi->type != GCI_string )
{
if ( pi->size % 8 )
return GCI_UnsupportedType;
pi->size /= 8;
}
return GCI_validate( pi->size, pi->type, depth || pi->indirect );
}
