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/*-----------------------------------------------------------------------
File : cio_basicparser.c
Author: Stephan Schulz
Contents
Parsing routines for useful C build-in Datatypes not covered by the
scanner.
Copyright 1998-2020 by the author.
This code is released under the GNU General Public Licence and
the GNU Lesser General Public License.
See the file COPYING in the main E directory for details..
Run "eprover -h" for contact information.
Created: Sat Jul 5 02:28:25 MET DST 1997
-----------------------------------------------------------------------*/
#include <stdlib.h>
#include "cio_basicparser.h"
/*---------------------------------------------------------------------*/
/* Global Variables */
/*---------------------------------------------------------------------*/
/*---------------------------------------------------------------------*/
/* Forward Declarations */
/*---------------------------------------------------------------------*/
/*---------------------------------------------------------------------*/
/* Internal Functions */
/*---------------------------------------------------------------------*/
/*---------------------------------------------------------------------*/
/* Exported Functions */
/*---------------------------------------------------------------------*/
/*-----------------------------------------------------------------------
//
// Function: ParseBool()
//
// Parse and return a Boolean value (true/false).
//
// Global Variables: -
//
// Side Effects : Input
//
/----------------------------------------------------------------------*/
bool ParseBool(Scanner_p in)
{
bool res = false;
CheckInpId(in, "true|false");
if(TestInpId(in, "true"))
{
res = true;
}
NextToken(in);
return res;
}
/*-----------------------------------------------------------------------
//
// Function: ParseIntMax()
//
// Parses a (possibly negative) Integer, defined as an optional "-",
// followed by a sequence of digits. Returns the value or gives an
// error on overflow.
//
// Global Variables:
//
// Side Effects :
//
/----------------------------------------------------------------------*/
intmax_t ParseIntMax(Scanner_p in)
{
intmax_t value;
if(TestInpTok(in, Hyphen))
{
NextToken(in);
CheckInpTokNoSkip(in, PosInt);
value = - strtoimax(DStrView(AktToken(in)->literal), NULL, 10);
}
else
{
CheckInpTok(in, PosInt);
value = - strtoimax(DStrView(AktToken(in)->literal), NULL, 10);
}
NextToken(in);
return value;
}
/*-----------------------------------------------------------------------
//
// Function: ParseIntLimited()
//
// Parses a (possibly negative) Integer, defined as an optional "-",
// followed by a sequence of digits. Returns the value or gives an
// error on overflow.
//
// Global Variables:
//
// Side Effects :
//
/----------------------------------------------------------------------*/
long ParseIntLimited(Scanner_p in, long lower, long upper)
{
long value;
if(TestInpTok(in, Hyphen))
{
NextToken(in);
CheckInpTokNoSkip(in, PosInt);
if((AktToken(in)->numval-1) > LONG_MAX)
{
AktTokenError(in, "Long integer underflow", false);
}
value = -AktToken(in)->numval;
}
else
{
CheckInpTok(in, PosInt);
if(AktToken(in)->numval > LONG_MAX)
{
AktTokenError(in, "Long integer overflow", false);
}
value = AktToken(in)->numval;
}
if(!((value >= lower) && (value <= upper)))
{
AktTokenError(in, "Long integer out of expected range", false);
}
NextToken(in);
return value;
}
/*-----------------------------------------------------------------------
//
// Function: ParseInt()
//
// Parses a (possibly negative) (long) Integer, defined as an
// optional "-", // followed by a sequence of digits. Returns the
// value or gives an error on overflow.
//
// Global Variables: -
//
// Side Effects : Input is read (and checked)
//
/----------------------------------------------------------------------*/
long ParseInt(Scanner_p in)
{
return ParseIntLimited(in, LONG_MIN, LONG_MAX);
}
/*-----------------------------------------------------------------------
//
// Function: ParseUIntMax()
//
// Parses an uintmax-Integer, a sequence of digits. Returns the
// value or gives an error on overflow.
//
// Global Variables:
//
// Side Effects :
//
/----------------------------------------------------------------------*/
uintmax_t ParseUIntMax(Scanner_p in)
{
uintmax_t value;
CheckInpTok(in, PosInt);
value = AktToken(in)->numval;
NextToken(in);
return value;
}
/*-----------------------------------------------------------------------
//
// Function: ParseFloat()
//
// Parse a float in x.yEz format (optional negative and so on...)
//
// Global Variables: -
//
// Side Effects : Input, may cause error
//
/----------------------------------------------------------------------*/
#ifndef ALLOW_COMMA_AS_DECIMAL_DOT
#define DECIMAL_DOT Fullstop
#else
#define DECIMAL_DOT Fullstop|Comma
#endif
double ParseFloat(Scanner_p in)
{
double value;
DStrReset(in->accu);
if(TestInpTok(in, Hyphen|Plus))
{
DStrAppendDStr(in->accu, AktToken(in)->literal);
NextToken(in);
CheckInpTokNoSkip(in, PosInt);
}
else
{
CheckInpTok(in, PosInt);
}
DStrAppendDStr(in->accu, AktToken(in)->literal);
NextToken(in);
/* Parsed [-]123 so far */
if(TestInpNoSkip(in)&&TestInpTok(in, DECIMAL_DOT))
{
DStrAppendChar(in->accu, '.');
AcceptInpTokNoSkip(in, DECIMAL_DOT);
DStrAppendDStr(in->accu, AktToken(in)->literal);
AcceptInpTokNoSkip(in, PosInt);
}
/* Parsed -123.1123 so far */
if(TestInpNoSkip(in)&&TestInpId(in, "e|E"))
{
DStrAppendDStr(in->accu, AktToken(in)->literal);
NextToken(in); /* Skip E */
DStrAppendDStr(in->accu, AktToken(in)->literal);
AcceptInpTokNoSkip(in, Hyphen|Plus); /* Eat - */
DStrAppendDStr(in->accu, AktToken(in)->literal);
AcceptInpTokNoSkip(in, PosInt);
}
errno = 0;
value = strtod(DStrView(in->accu), NULL);
if(errno)
{
TmpErrno = errno;
AktTokenError(in, "Cannot translate double", true);
}
return value;
}
/*-----------------------------------------------------------------------
//
// Function: ParseNumString()
//
// Parse a (possibly signed) number (Integer, Rational, or Float)
// and return the most specific type compatible with it. The number
// is not evaluated, but its ASCII representation is stored in
// in->accu.
//
// Global Variables: -
//
// Side Effects : Reads input, DStr handling may cause memory
// operations.
//
/----------------------------------------------------------------------*/
StrNumType ParseNumString(Scanner_p in)
{
StrNumType res = SNInteger;
DStr_p accumulator = in->accu;
DStrReset(accumulator);
if(TestInpTok(in, Hyphen|Plus))
{
DStrAppendDStr(accumulator, AktToken(in)->literal);
NextToken(in);
CheckInpTokNoSkip(in, PosInt);
}
else
{
CheckInpTok(in, PosInt);
}
DStrAppendDStr(accumulator, AktToken(in)->literal);
NextToken(in);
if(TestInpTokNoSkip(in, Slash))
{
DStrAppendChar(accumulator, '/');
NextToken(in);
if(TestInpTok(in, Hyphen|Plus))
{
DStrAppendDStr(accumulator, AktToken(in)->literal);
NextToken(in);
}
if(TestInpTok(in, PosInt))
{
if(atol(DStrView(AktToken(in)->literal)) == 0l)
{
AktTokenError(in, "Denominator in rational number cannot be 0", false);
}
}
DStrAppendDStr(accumulator, AktToken(in)->literal);
AcceptInpTokNoSkip(in, PosInt);
res = SNRational;
}
else
{
if(TestInpTokNoSkip(in, DECIMAL_DOT) &&
TestTok(LookToken(in,1), PosInt) &&
!(LookToken(in,1)->skipped))
{
DStrAppendChar(accumulator, '.');
AcceptInpTokNoSkip(in, DECIMAL_DOT);
DStrAppendDStr(accumulator, AktToken(in)->literal);
AcceptInpTokNoSkip(in, PosInt);
res = SNFloat;
}
if(TestInpNoSkip(in))
{
if(TestInpId(in, "e|E"))
{
DStrAppendStr(accumulator, "e");
NextToken(in); /* Skip E */
DStrAppendDStr(accumulator, AktToken(in)->literal);
AcceptInpTokNoSkip(in, Hyphen|Plus); /* Eat - */
DStrAppendDStr(accumulator, AktToken(in)->literal);
AcceptInpTokNoSkip(in, PosInt);
res = SNFloat;
}
else if(TestInpIdnum(in, "e|E"))
{
DStrAppendDStr(accumulator, AktToken(in)->literal);
AcceptInpTokNoSkip(in, Idnum);
res = SNFloat;
}
}
}
return res;
}
/*-----------------------------------------------------------------------
//
// Function: DDArrayParse()
//
// Parse a coma-delimited list of double values into array. If
// brackets is true, expect the list to be enclosed into (). Return
// the number of values parsed.
//
// Global Variables: -
//
// Side Effects : Reads input
//
/----------------------------------------------------------------------*/
long DDArrayParse(Scanner_p in, DDArray_p array, bool brackets)
{
long i=0;
if(brackets)
{
AcceptInpTok(in, OpenBracket);
}
if(TestInpTok(in, Hyphen|Plus|PosInt))
{
DDArrayAssign(array, i, ParseFloat(in));
i++;
while(TestInpTok(in, Comma))
{
NextToken(in); /* We know it's a comma */
DDArrayAssign(array, i, ParseFloat(in));
i++;
}
}
if(brackets)
{
AcceptInpTok(in, CloseBracket);
}
return i;
}
/*-----------------------------------------------------------------------
//
// Function: ParseFilename()
//
// Parse a filename and return
// it. Note that we only allow reasonably "normal" filenames or
// strings, i.e. not spaces, non-printables, most meta-charachters,
// or quotes.
//
// Global Variables: -
//
// Side Effects : Read input, allocates space (which must be freed
// by the caller)
//
/----------------------------------------------------------------------*/
#define PLAIN_FILE_TOKENS String|Name|PosInt|Fullstop|Plus|Hyphen|EqualSign
char* ParseFilename(Scanner_p in)
{
bool first_tok = true;
DStrReset(in->accu);
while((first_tok || TestInpNoSkip(in)) &&
TestInpTok(in, PLAIN_FILE_TOKENS|Slash|Mult))
{
DStrAppendDStr(in->accu, AktToken(in)->literal);
NextToken(in);
first_tok = false;
}
return SecureStrdup(DStrView(in->accu));
}
/*-----------------------------------------------------------------------
//
// Function: ParsePlainFileName()
//
// Parse a local file name (without /) and return it. The caller has
// to free the allocated memory!
//
// Global Variables: -
//
// Side Effects :
//
/----------------------------------------------------------------------*/
char* ParsePlainFilename(Scanner_p in)
{
bool first_tok = true;
DStrReset(in->accu);
while((first_tok || TestInpNoSkip(in)) &&
TestInpTok(in, PLAIN_FILE_TOKENS|Slash))
{
DStrAppendDStr(in->accu, AktToken(in)->literal);
NextToken(in);
first_tok = false;
}
return SecureStrdup(DStrView(in->accu));
}
/*-----------------------------------------------------------------------
//
// Function: ParseBasicInclude()
//
// Parse a basic TPTP-3 include (without optional selector),
// return the file name (which the caller has to free).
//
// Global Variables: -
//
// Side Effects : Input, memory allocation.
//
/----------------------------------------------------------------------*/
char* ParseBasicInclude(Scanner_p in)
{
char* res;
AcceptInpId(in, "include");
AcceptInpTok(in, OpenBracket);
CheckInpTok(in, SQString);
res = DStrCopyCore(AktToken(in)->literal);
NextToken(in);
AcceptInpTok(in, CloseBracket);
AcceptInpTok(in, Fullstop);
return res;
}
/*-----------------------------------------------------------------------
//
// Function: ParseDottedId()
//
// Parse a sequence id1.id2.id2 ... and return it as a string.
//
// Global Variables: -
//
// Side Effects : Input, memory ops.
//
/----------------------------------------------------------------------*/
char* ParseDottedId(Scanner_p in)
{
DStrReset(in->accu);
DStrAppendDStr(in->accu, AktToken(in)->literal);
AcceptInpTok(in, Identifier|PosInt);
while(TestInpNoSkip(in) && TestInpTok(in, Fullstop))
{
DStrAppendDStr(in->accu, AktToken(in)->literal);
AcceptInpTok(in, Fullstop);
DStrAppendDStr(in->accu, AktToken(in)->literal);
AcceptInpTok(in, Identifier|PosInt);
}
return SecureStrdup(DStrView(in->accu));
}
/*-----------------------------------------------------------------------
//
// Function: AcceptDottedId()
//
// Parse a sequence id1.id2.id2..., check it against an expected
// value, and skip it. Print error and terminate on mismatch.
//
// Global Variables: -
//
// Side Effects : Input, memory ops.
//
/----------------------------------------------------------------------*/
void AcceptDottedId(Scanner_p in, char* expected)
{
char* candidate;
char* posrep = TokenPosRep(AktToken(in));
candidate = ParseDottedId(in);
if(strcmp(candidate, expected)!=0)
{
Error("%s %s expected, but %s read", SYNTAX_ERROR,
posrep, expected, candidate);
}
FREE(candidate);
}
/*-----------------------------------------------------------------------
//
// Function: ParseContinous()
//
// Parse a sequence of tokens with no whitespace and return the
// result as a string.
//
// Global Variables: -
//
// Side Effects : Input, memory ops.
//
/----------------------------------------------------------------------*/
char* ParseContinous(Scanner_p in)
{
DStrReset(in->accu);
DStrAppendDStr(in->accu, AktToken(in)->literal);
NextToken(in);
while(TestInpNoSkip(in))
{
DStrAppendDStr(in->accu, AktToken(in)->literal);
NextToken(in);
}
return SecureStrdup(DStrView(in->accu));
}
/*-----------------------------------------------------------------------
//
// Function: ParseSkipParenthesizedExpr()
//
// Skip any expression containing balanced (), [], {}. Print error
// on missmatch. Note that no full syntax check is performed, we are
// only interested in the different braces.
//
// Global Variables: -
//
// Side Effects : Input
//
/----------------------------------------------------------------------*/
void ParseSkipParenthesizedExpr(Scanner_p in)
{
PStack_p paren_stack = PStackAlloc();
TokenType tok;
CheckInpTok(in, OpenBracket|OpenCurly|OpenSquare);
PStackPushInt(paren_stack, AktTokenType(in));
NextToken(in);
while(!PStackEmpty(paren_stack))
{
if(TestInpTok(in, OpenBracket|OpenCurly|OpenSquare))
{
PStackPushInt(paren_stack, AktTokenType(in));
NextToken(in);
}
else if(TestInpTok(in, CloseBracket|CloseCurly|CloseSquare))
{
tok = PStackPopInt(paren_stack);
switch(tok)
{
case OpenBracket:
AcceptInpTok(in,CloseBracket);
break;
case OpenCurly:
AcceptInpTok(in, CloseCurly);
break;
case OpenSquare:
AcceptInpTok(in,CloseSquare);
break;
default:
assert(false && "Impossible value on parentheses stack");
break;
}
}
else
{
NextToken(in);
}
}
PStackFree(paren_stack);
}
/*---------------------------------------------------------------------*/
/* End of File */
/*---------------------------------------------------------------------*/
|