lcd4linux: removed trash

1 files changed, 0 insertions, 1430 deletions

diff --git a/oncology/dpfhack_display/lcd4linux/.svn/text-base/evaluator.c.svn-base b/oncology/dpfhack_display/lcd4linux/.svn/text-base/evaluator.c.svn-base
deleted file mode 100644
index d0d49288..00000000
--- a/oncology/dpfhack_display/lcd4linux/.svn/text-base/evaluator.c.svn-base
+++ /dev/null
@@ -1,1430 +0,0 @@
-/* $Id$
- * $URL$
- *
- * expression evaluation
- *
- * Copyright (C) 1999, 2000 Michael Reinelt <michael@reinelt.co.at>
- * Copyright (C) 2004 The LCD4Linux Team <lcd4linux-devel@users.sourceforge.net>
- *
- * This file is part of LCD4Linux.
- *
- * LCD4Linux is free software; you can redistribute it and/or modify
- * it under the terms of the GNU General Public License as published by
- * the Free Software Foundation; either version 2, or (at your option)
- * any later version.
- *
- * LCD4Linux 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 General Public License for more details.
- *
- * You should have received a copy of the GNU General Public License
- * along with this program; if not, write to the Free Software
- * Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
- *
- */
-
-
-/* 
- * exported functions:
- *
- * int SetVariable (char *name, RESULT *value)
- *   adds a generic variable to the evaluator
- *
- * int SetVariableNumeric (char *name, double value)
- *   adds a numerical variable to the evaluator
- *
- * int SetVariableString (char *name, char *value)
- *   adds a numerical variable to the evaluator
- *
- * int AddFunction (char *name, int argc, void (*func)())
- *   adds a function to the evaluator
- *
- * void DeleteVariables    (void);
- *   frees all allocated variables
- *
- * void DeleteFunctions    (void);
- *   frees all allocated functions
- *
- * void DelResult (RESULT *result)
- *   sets a result to none
- *   frees a probably allocated memory
- *
- * RESULT* SetResult (RESULT **result, int type, void *value)
- *   initializes a result
- *
- * double R2N (RESULT *result)
- *   converts a result into a number
- *
- * char* R2S (RESULT *result)
- *   converts a result into a string
- *
- *
- * int Compile (char* expression, void **tree)
- *   compiles a expression into a tree
- * 
- * int Eval (void *tree, RESULT *result)
- *   evaluates an expression
- *
- * void DelTree (void *tree)
- *   frees a compiled tree
- */
-
-
-#include "config.h"
-
-#include <stdlib.h>
-#include <stdio.h>
-#include <string.h>
-#include <ctype.h>
-#include <math.h>
-#include <setjmp.h>
-
-#include "debug.h"
-#include "evaluator.h"
-
-#ifdef WITH_DMALLOC
-#include <dmalloc.h>
-#endif
-
-/* string buffer chunk size */
-#define CHUNK_SIZE 16
-
-typedef enum {
-    T_UNDEF,
-    T_NAME,
-    T_NUMBER,
-    T_STRING,
-    T_OPERATOR,
-    T_VARIABLE,
-    T_FUNCTION
-} TOKEN;
-
-typedef enum {
-    O_UNDEF,			/* undefined */
-    O_LST,			/* expression lists */
-    O_SET,			/* variable assignements */
-    O_CND,			/* conditional a?b:c */
-    O_COL,			/* colon in a?b:c */
-    O_OR,			/* logical OR */
-    O_AND,			/* logical AND */
-    O_NEQ,			/* numeric equal */
-    O_NNE,			/* numeric not equal */
-    O_NLT,			/* numeric less than */
-    O_NLE,			/* numeric less or equal */
-    O_NGT,			/* numeric greater than */
-    O_NGE,			/* numeric greater or equal */
-    O_SEQ,			/* string equal */
-    O_SNE,			/* string not equal */
-    O_SLT,			/* string less than */
-    O_SLE,			/* string less or equal */
-    O_SGT,			/* string greater than */
-    O_SGE,			/* string greater or equal */
-    O_ADD,			/* addition */
-    O_SUB,			/* subtraction */
-    O_SGN,			/* sign '-' */
-    O_CAT,			/* string concatenation */
-    O_MUL,			/* multiplication */
-    O_DIV,			/* division */
-    O_MOD,			/* modulo */
-    O_POW,			/* power */
-    O_NOT,			/* logical NOT */
-    O_BRO,			/* open brace */
-    O_COM,			/* comma (argument seperator) */
-    O_BRC			/* closing brace */
-} OPERATOR;
-
-typedef struct {
-    char *pattern;
-    int len;
-    OPERATOR op;
-} PATTERN;
-
-typedef struct {
-    char *name;
-    RESULT *value;
-} VARIABLE;
-
-typedef struct {
-    char *name;
-    int argc;
-    void (*func) ();
-} FUNCTION;
-
-typedef struct _NODE {
-    TOKEN Token;
-    OPERATOR Operator;
-    RESULT *Result;
-    VARIABLE *Variable;
-    FUNCTION *Function;
-    int Children;
-    struct _NODE **Child;
-} NODE;
-
-
-
-/* non-alphanumeric operators */
-/* IMPORTANT! list must be sorted by length! */
-static PATTERN Pattern1[] = {
-    {";", 1, O_LST},		/* expression lists */
-    {"=", 1, O_SET},		/* variable assignements */
-    {"?", 1, O_CND},		/* conditional a?b:c */
-    {":", 1, O_COL},		/* colon a?b:c */
-    {"|", 1, O_OR},		/* logical OR */
-    {"&", 1, O_AND},		/* logical AND */
-    {"<", 1, O_NLT},		/* numeric less than */
-    {">", 1, O_NGT},		/* numeric greater than */
-    {"+", 1, O_ADD},		/* addition */
-    {"-", 1, O_SUB},		/* subtraction or sign */
-    {".", 1, O_CAT},		/* string concatenation */
-    {"*", 1, O_MUL},		/* multiplication */
-    {"/", 1, O_DIV},		/* division */
-    {"%", 1, O_MOD},		/* modulo */
-    {"^", 1, O_POW},		/* power */
-    {"!", 1, O_NOT},		/* logical NOT */
-    {"(", 1, O_BRO},		/* open brace */
-    {",", 1, O_COM},		/* comma (argument seperator) */
-    {")", 1, O_BRC},		/* closing brace */
-    {"==", 2, O_NEQ},		/* numeric equal */
-    {"!=", 2, O_NNE},		/* numeric not equal */
-    {"<=", 2, O_NLE},		/* numeric less or equal */
-    {">=", 2, O_NGE}		/* numeric greater or equal */
-};
-
-/* alphanumeric operators */
-/* IMPORTANT! list must be sorted by length! */
-static PATTERN Pattern2[] = {
-    {"eq", 2, O_SEQ},		/* string equal */
-    {"ne", 2, O_SNE},		/* string not equal */
-    {"lt", 2, O_SLT},		/* string less than */
-    {"le", 2, O_SLE},		/* string less or equal */
-    {"gt", 2, O_SGT},		/* string greater than */
-    {"ge", 2, O_SGE}		/* string greater or equal */
-};
-
-
-static char *Expression = NULL;
-static char *ExprPtr = NULL;
-static char *Word = NULL;
-static TOKEN Token = T_UNDEF;
-static OPERATOR Operator = O_UNDEF;
-
-static VARIABLE Variable[255];
-static unsigned int nVariable = 0;
-
-static FUNCTION *Function = NULL;
-static unsigned int nFunction = 0;
-
-
-/* strndup() may be not available on several platforms */
-#ifndef HAVE_STRNDUP
-char *strndup(const char *source, size_t len)
-{
-    char *tmp = NULL;
-
-    if (source == NULL)
-	return NULL;
-
-    if (len >= strlen(source))
-	return strdup(source);
-
-    tmp = malloc(len + 1);
-    if (tmp == 0)
-	return NULL;
-
-    strncpy(tmp, source, len);
-    tmp[len] = '\0';
-
-    return (tmp);
-}
-#endif
-
-
-void DelResult(RESULT * result)
-{
-    result->type = 0;
-    result->size = 0;
-    result->number = 0.0;
-    if (result->string) {
-	free(result->string);
-	result->string = NULL;
-    }
-}
-
-
-static void FreeResult(RESULT * result)
-{
-    if (result != NULL) {
-	DelResult(result);
-	free(result);
-    }
-}
-
-
-static RESULT *NewResult(void)
-{
-    RESULT *result = malloc(sizeof(RESULT));
-    if (result == NULL) {
-	error("Evaluator: cannot allocate result: out of memory!");
-	return NULL;
-    }
-    result->type = 0;
-    result->size = 0;
-    result->number = 0.0;
-    result->string = NULL;
-
-    return result;
-}
-
-
-RESULT *SetResult(RESULT ** result, const int type, const void *value)
-{
-    if (*result == NULL) {
-	if ((*result = NewResult()) == NULL)
-	    return NULL;
-    } else if (type == R_NUMBER) {
-	DelResult(*result);
-    }
-
-    if (type == R_NUMBER) {
-	(*result)->type = R_NUMBER;
-	(*result)->size = 0;
-	(*result)->number = *(double *) value;
-	(*result)->string = NULL;
-    }
-
-    else if (type == R_STRING) {
-	int len = strlen((char *) value);
-	(*result)->type = R_STRING;
-	(*result)->number = 0.0;
-	if ((*result)->string == NULL || len >= (*result)->size) {
-	    /* buffer is either empty or too small */
-	    if ((*result)->string)
-		free((*result)->string);
-	    /* allocate memory in multiples of CHUNK_SIZE */
-	    (*result)->size = CHUNK_SIZE * ((len + 1) / CHUNK_SIZE + 1);
-	    (*result)->string = malloc((*result)->size);
-	}
-	strcpy((*result)->string, value);
-    } else {
-	error("Evaluator: internal error: invalid result type %d", type);
-	return NULL;
-    }
-
-    return *result;
-}
-
-
-RESULT *CopyResult(RESULT ** result, RESULT * value)
-{
-    if (*result == NULL) {
-	if ((*result = NewResult()) == NULL)
-	    return NULL;
-    }
-
-    (*result)->type = value->type;
-    (*result)->number = value->number;
-
-    if (value->string == NULL) {
-	(*result)->size = 0;
-	if ((*result)->string)
-	    free((*result)->string);
-	(*result)->string = NULL;
-    } else {
-	/* is buffer large enough? */
-	if ((*result)->string == NULL || value->size > (*result)->size) {
-	    if ((*result)->string)
-		free((*result)->string);
-	    (*result)->size = value->size;
-	    (*result)->string = malloc((*result)->size);
-	}
-	strcpy((*result)->string, value->string);
-    }
-    return *result;
-}
-
-
-double R2N(RESULT * result)
-{
-    if (result == NULL) {
-	error("Evaluator: internal error: NULL result");
-	return 0.0;
-    }
-
-    if (result->type == 0) {
-	return 0.0;
-    }
-
-    if (result->type & R_NUMBER) {
-	return result->number;
-    }
-
-    if (result->type & R_STRING) {
-	result->type |= R_NUMBER;
-	result->number = atof(result->string);
-	return result->number;
-    }
-
-    error("Evaluator: internal error: invalid result type %d", result->type);
-    return 0.0;
-}
-
-
-char *R2S(RESULT * result)
-{
-    if (result == NULL) {
-	error("Evaluator: internal error: NULL result");
-	return NULL;
-    }
-
-    if (result->type == 0) {
-	return NULL;
-    }
-
-    if (result->type & R_STRING) {
-	return result->string;
-    }
-
-    if (result->type & R_NUMBER) {
-	result->type |= R_STRING;
-	if (result->string)
-	    free(result->string);
-	result->size = CHUNK_SIZE;
-	result->string = malloc(result->size);
-	snprintf(result->string, result->size, "%g", result->number);
-	return result->string;
-    }
-
-    error("Evaluator: internal error: invalid result type %d", result->type);
-    return NULL;
-
-}
-
-
-static VARIABLE *FindVariable(const char *name)
-{
-    unsigned int i;
-
-    for (i = 0; i < nVariable; i++) {
-	if (strcmp(name, Variable[i].name) == 0) {
-	    return &Variable[i];
-	}
-    }
-    return NULL;
-}
-
-
-int SetVariable(const char *name, RESULT * value)
-{
-    VARIABLE *V;
-
-    V = FindVariable(name);
-    if (V != NULL) {
-	CopyResult(&V->value, value);
-	return 1;
-    }
-
-    if (nVariable >= sizeof(Variable) / sizeof(Variable[0])) {
-	error("Evaluator: cannot set variable <%s>: out of slots", name);
-	return -1;
-    }
-
-    nVariable++;
-    Variable[nVariable - 1].name = strdup(name);
-    Variable[nVariable - 1].value = NULL;
-    CopyResult(&Variable[nVariable - 1].value, value);
-
-    return 0;
-}
-
-
-int SetVariableNumeric(const char *name, const double value)
-{
-    RESULT result = { 0, 0, 0, NULL };
-    RESULT *rp = &result;
-
-    SetResult(&rp, R_NUMBER, &value);
-
-    return SetVariable(name, rp);
-}
-
-
-int SetVariableString(const char *name, const char *value)
-{
-    RESULT result = { 0, 0, 0, NULL };
-    RESULT *rp = &result;
-
-    SetResult(&rp, R_STRING, value);
-
-    return SetVariable(name, rp);
-}
-
-
-void DeleteVariables(void)
-{
-    unsigned int i;
-
-    for (i = 0; i < nVariable; i++) {
-	free(Variable[i].name);
-	FreeResult(Variable[i].value);
-    }
-    nVariable = 0;
-}
-
-
-/* bsearch compare function for functions */
-static int LookupFunction(const void *a, const void *b)
-{
-    char *n = (char *) a;
-    FUNCTION *f = (FUNCTION *) b;
-
-    return strcmp(n, f->name);
-}
-
-
-/* qsort compare function for functions */
-static int SortFunction(const void *a, const void *b)
-{
-    FUNCTION *fa = (FUNCTION *) a;
-    FUNCTION *fb = (FUNCTION *) b;
-
-    return strcmp(fa->name, fb->name);
-}
-
-
-static FUNCTION *FindFunction(const char *name)
-{
-    return bsearch(name, Function, nFunction, sizeof(FUNCTION), LookupFunction);
-}
-
-
-int AddFunction(const char *name, const int argc, void (*func) ())
-{
-    nFunction++;
-    Function = realloc(Function, nFunction * sizeof(FUNCTION));
-    Function[nFunction - 1].name = strdup(name);
-    Function[nFunction - 1].argc = argc;
-    Function[nFunction - 1].func = func;
-
-    qsort(Function, nFunction, sizeof(FUNCTION), SortFunction);
-
-    return 0;
-}
-
-
-void DeleteFunctions(void)
-{
-    unsigned int i;
-
-    for (i = 0; i < nFunction; i++) {
-	free(Function[i].name);
-    }
-    free(Function);
-    Function = NULL;
-    nFunction = 0;
-}
-
-
-#define is_space(c)  ((c) == ' ' || (c) == '\t')
-#define is_digit(c)  ((c) >= '0' && (c) <= '9')
-#define is_alpha(c) (((c) >= 'A' && (c) <= 'Z') || ((c) >= 'a' && (c) <= 'z') || ((c) == '_'))
-#define is_alnum(c) (is_alpha(c) || is_digit(c))
-
-static void Parse(void)
-{
-    Token = T_UNDEF;
-    Operator = O_UNDEF;
-
-    if (Word) {
-	free(Word);
-	Word = NULL;
-    }
-
-    /* NULL expression? */
-    if (ExprPtr == NULL) {
-	Word = strdup("");
-	return;
-    }
-
-    /* skip leading whitespace */
-    while (is_space(*ExprPtr))
-	ExprPtr++;
-
-    /* names */
-    if (is_alpha(*ExprPtr)) {
-	int i;
-	char *start = ExprPtr;
-	while (is_alnum(*ExprPtr))
-	    ExprPtr++;
-	if (*ExprPtr == ':' && *(ExprPtr + 1) == ':' && is_alpha(*(ExprPtr + 2))) {
-	    ExprPtr += 3;
-	    while (is_alnum(*ExprPtr))
-		ExprPtr++;
-	}
-	Word = strndup(start, ExprPtr - start);
-	Token = T_NAME;
-
-	/* check for alphanumeric operators */
-	for (i = sizeof(Pattern2) / sizeof(Pattern2[0]) - 1; i >= 0; i--) {
-	    if (strcmp(Word, Pattern2[i].pattern) == 0) {
-		Token = T_OPERATOR;
-		Operator = Pattern2[i].op;
-		break;
-	    }
-	}
-
-    }
-
-    /* numbers */
-    else if (is_digit(*ExprPtr) || (*ExprPtr == '.' && is_digit(*(ExprPtr + 1)))) {
-	char *start = ExprPtr;
-	while (is_digit(*ExprPtr))
-	    ExprPtr++;
-	if (*ExprPtr == '.') {
-	    ExprPtr++;
-	    while (is_digit(*ExprPtr))
-		ExprPtr++;
-	}
-	Word = strndup(start, ExprPtr - start);
-	Token = T_NUMBER;
-    }
-
-    /* strings */
-    else if (*ExprPtr == '\'') {
-	size_t length = 0;
-	size_t size = CHUNK_SIZE;
-	Word = malloc(size);
-	ExprPtr++;
-	while (*ExprPtr != '\0' && *ExprPtr != '\'') {
-	    if (*ExprPtr == '\\') {
-		switch (*(ExprPtr + 1)) {
-		case '\\':
-		case '\'':
-		    Word[length++] = *(ExprPtr + 1);
-		    ExprPtr += 2;
-		    break;
-		case 'a':
-		    Word[length++] = '\a';
-		    ExprPtr += 2;
-		    break;
-		case 'b':
-		    Word[length++] = '\b';
-		    ExprPtr += 2;
-		    break;
-		case 't':
-		    Word[length++] = '\t';
-		    ExprPtr += 2;
-		    break;
-		case 'n':
-		    Word[length++] = '\n';
-		    ExprPtr += 2;
-		    break;
-		case 'v':
-		    Word[length++] = '\v';
-		    ExprPtr += 2;
-		    break;
-		case 'f':
-		    Word[length++] = '\f';
-		    ExprPtr += 2;
-		    break;
-		case 'r':
-		    Word[length++] = '\r';
-		    ExprPtr += 2;
-		    break;
-		case '0':
-		case '1':
-		case '2':
-		case '3':
-		    if (*(ExprPtr + 2) >= '0' && *(ExprPtr + 2) <= '7' &&
-			*(ExprPtr + 3) >= '0' && *(ExprPtr + 3) <= '7') {
-			Word[length++] =
-			    (*(ExprPtr + 1) - '0') * 64 + (*(ExprPtr + 2) - '0') * 8 + (*(ExprPtr + 3) - '0');
-			ExprPtr += 4;
-		    } else {
-			error("Evaluator: illegal octal sequence '\\%c%c%c' in <%s>",
-			      *(ExprPtr + 1), *(ExprPtr + 2), *(ExprPtr + 3), Expression);
-			Word[length++] = *ExprPtr++;
-		    }
-		    break;
-		default:
-		    error("Evaluator: unknown escape sequence '\\%c' in <%s>", *(ExprPtr + 1), Expression);
-		    Word[length++] = *ExprPtr++;
-		}
-	    } else {
-		Word[length++] = *ExprPtr++;
-	    }
-	    if (length >= size) {
-		size += CHUNK_SIZE;
-		Word = realloc(Word, size);
-	    }
-	}
-	Word[length] = '\0';
-	Token = T_STRING;
-	if (*ExprPtr == '\'') {
-	    ExprPtr++;
-	} else {
-	    error("Evaluator: unterminated string in <%s>", Expression);
-	}
-    }
-
-    /* non-alpha operators */
-    else {
-	int i;
-	for (i = sizeof(Pattern1) / sizeof(Pattern1[0]) - 1; i >= 0; i--) {
-	    int len = Pattern1[i].len;
-	    if (strncmp(ExprPtr, Pattern1[i].pattern, Pattern1[i].len) == 0) {
-		Word = strndup(ExprPtr, len);
-		Token = T_OPERATOR;
-		Operator = Pattern1[i].op;
-		ExprPtr += len;
-		break;
-	    }
-	}
-    }
-
-    /* syntax check */
-    if (Token == T_UNDEF && *ExprPtr != '\0') {
-	error("Evaluator: parse error in <%s>: garbage <%s>", Expression, ExprPtr);
-    }
-
-    /* skip trailing whitespace */
-    while (is_space(*ExprPtr))
-	ExprPtr++;
-
-    /* empty token */
-    if (Word == NULL)
-	Word = strdup("");
-}
-
-
-static NODE *NewNode(NODE * Child)
-{
-    NODE *N;
-
-    N = malloc(sizeof(NODE));
-    if (N == NULL)
-	return NULL;
-
-    memset(N, 0, sizeof(NODE));
-    N->Token = Token;
-    N->Operator = Operator;
-
-    if (Child != NULL) {
-	N->Children = 1;
-	N->Child = malloc(sizeof(NODE *));
-	N->Child[0] = Child;
-    }
-
-    return N;
-
-}
-
-
-static NODE *JunkNode(void)
-{
-    NODE *Junk;
-
-    Junk = NewNode(NULL);
-    Junk->Token = T_STRING;
-    SetResult(&Junk->Result, R_STRING, "");
-
-    return Junk;
-}
-
-
-static void LinkNode(NODE * Root, NODE * Child)
-{
-
-    if (Child == NULL)
-	return;
-
-    Root->Children++;
-    Root->Child = realloc(Root->Child, Root->Children * sizeof(NODE *));
-    if (Root->Child == NULL)
-	return;
-    Root->Child[Root->Children - 1] = Child;
-}
-
-
-/* forward declaration */
-static NODE *Level01(void);
-
-
-/* literal numbers, variables, functions */
-static NODE *Level12(void)
-{
-    NODE *Root = NULL;
-
-    if (Token == T_OPERATOR && Operator == O_BRO) {
-	Parse();
-	Root = Level01();
-	if (Token != T_OPERATOR || Operator != O_BRC) {
-	    error("Evaluator: unbalanced parentheses in <%s>", Expression);
-	    LinkNode(Root, JunkNode());
-	}
-    }
-
-    else if (Token == T_NUMBER) {
-	double value = atof(Word);
-	Root = NewNode(NULL);
-	SetResult(&Root->Result, R_NUMBER, &value);
-    }
-
-    else if (Token == T_STRING) {
-	Root = NewNode(NULL);
-	SetResult(&Root->Result, R_STRING, Word);
-    }
-
-    else if (Token == T_NAME) {
-
-	/* look-ahead for opening brace */
-	if (*ExprPtr == '(') {
-	    int argc = 0;
-	    Root = NewNode(NULL);
-	    Root->Token = T_FUNCTION;
-	    Root->Result = NewResult();
-	    Root->Function = FindFunction(Word);
-	    if (Root->Function == NULL) {
-		error("Evaluator: unknown function '%s' in <%s>", Word, Expression);
-		Root->Token = T_STRING;
-		SetResult(&Root->Result, R_STRING, "");
-	    }
-
-	    /* opening brace */
-	    Parse();
-	    do {
-		Parse();	/* read argument */
-		if (Token == T_OPERATOR && Operator == O_BRC) {
-		    break;
-		} else if (Token == T_OPERATOR && Operator == O_COM) {
-		    error("Evaluator: empty argument in <%s>", Expression);
-		    LinkNode(Root, JunkNode());
-		} else {
-		    LinkNode(Root, Level01());
-		}
-		argc++;
-	    } while (Token == T_OPERATOR && Operator == O_COM);
-
-	    /* check for closing brace */
-	    if (Token != T_OPERATOR || Operator != O_BRC) {
-		error("Evaluator: missing closing brace in <%s>", Expression);
-	    }
-
-	    /* check number of arguments */
-	    if (Root->Function != NULL && Root->Function->argc >= 0 && Root->Function->argc != argc) {
-		error("Evaluator: wrong number of arguments in <%s>", Expression);
-		while (argc < Root->Function->argc) {
-		    LinkNode(Root, JunkNode());
-		    argc++;
-		}
-	    }
-
-	} else {
-	    Root = NewNode(NULL);
-	    Root->Token = T_VARIABLE;
-	    Root->Result = NewResult();
-	    Root->Variable = FindVariable(Word);
-	    if (Root->Variable == NULL) {
-		SetVariableString(Word, "");
-		Root->Variable = FindVariable(Word);
-	    }
-	}
-    }
-
-    else {
-	error("Evaluator: syntax error in <%s>: <%s>", Expression, Word);
-	Root = NewNode(NULL);
-	Root->Token = T_STRING;
-	SetResult(&Root->Result, R_STRING, "");
-    }
-
-    Parse();
-    return Root;
-
-}
-
-
-/* unary + or - signs or logical 'not' */
-static NODE *Level11(void)
-{
-    NODE *Root;
-    TOKEN sign = T_UNDEF;
-
-    if (Token == T_OPERATOR && (Operator == O_ADD || Operator == O_SUB || Operator == O_NOT)) {
-	sign = Operator;
-	if (sign == O_SUB)
-	    sign = O_SGN;
-	Parse();
-    }
-
-    Root = Level12();
-
-    if (sign == O_SGN || sign == O_NOT) {
-	Root = NewNode(Root);
-	Root->Token = T_OPERATOR;
-	Root->Operator = sign;
-    }
-
-    return Root;
-}
-
-
-/* x^y */
-static NODE *Level10(void)
-{
-    NODE *Root;
-
-    Root = Level11();
-
-    while (Token == T_OPERATOR && Operator == O_POW) {
-	Root = NewNode(Root);
-	Parse();
-	LinkNode(Root, Level11());
-    }
-
-    return Root;
-}
-
-
-/* multiplication, division, modulo */
-static NODE *Level09(void)
-{
-    NODE *Root;
-
-    Root = Level10();
-
-    while (Token == T_OPERATOR && (Operator == O_MUL || Operator == O_DIV || Operator == O_MOD)) {
-	Root = NewNode(Root);
-	Parse();
-	LinkNode(Root, Level10());
-    }
-
-    return Root;
-}
-
-
-/* addition, subtraction, string concatenation */
-static NODE *Level08(void)
-{
-    NODE *Root;
-
-    Root = Level09();
-
-    while (Token == T_OPERATOR && (Operator == O_ADD || Operator == O_SUB || Operator == O_CAT)) {
-	Root = NewNode(Root);
-	Parse();
-	LinkNode(Root, Level09());
-    }
-
-    return Root;
-}
-
-
-/* relational operators */
-static NODE *Level07(void)
-{
-    NODE *Root;
-
-    Root = Level08();
-
-    while (Token == T_OPERATOR && (Operator == O_NGT || Operator == O_NGE || Operator == O_NLT || Operator == O_NLE ||
-				   Operator == O_SGT || Operator == O_SGE || Operator == O_SLT || Operator == O_SLE)) {
-	Root = NewNode(Root);
-	Parse();
-	LinkNode(Root, Level08());
-    }
-
-    return Root;
-}
-
-
-/* equal, not equal */
-static NODE *Level06(void)
-{
-    NODE *Root;
-
-    Root = Level07();
-
-    while (Token == T_OPERATOR && (Operator == O_NEQ || Operator == O_NNE || Operator == O_SEQ || Operator == O_SNE)) {
-	Root = NewNode(Root);
-	Parse();
-	LinkNode(Root, Level07());
-    }
-
-    return Root;
-}
-
-/* logical 'and' */
-static NODE *Level05(void)
-{
-    NODE *Root;
-
-    Root = Level06();
-
-    while (Token == T_OPERATOR && Operator == O_AND) {
-	Root = NewNode(Root);
-	Parse();
-	LinkNode(Root, Level06());
-    }
-
-    return Root;
-}
-
-
-/* logical 'or' */
-static NODE *Level04(void)
-{
-    NODE *Root;
-
-    Root = Level05();
-
-    while (Token == T_OPERATOR && Operator == O_OR) {
-	Root = NewNode(Root);
-	Parse();
-	LinkNode(Root, Level05());
-    }
-
-    return Root;
-}
-
-
-/* conditional expression a?b:c */
-static NODE *Level03(void)
-{
-    NODE *Root;
-
-    Root = Level04();
-
-    if (Token == T_OPERATOR && Operator == O_CND) {
-	Root = NewNode(Root);
-	Parse();
-	LinkNode(Root, Level04());
-	if (Token == T_OPERATOR && Operator == O_COL) {
-	    Parse();
-	    LinkNode(Root, Level04());
-	} else {
-	    error("Evaluator: syntax error in <%s>: expecting ':' got '%s'", Expression, Word);
-	    LinkNode(Root, JunkNode());
-	}
-    }
-
-    return Root;
-}
-
-
-/* variable assignments */
-static NODE *Level02(void)
-{
-    NODE *Root;
-
-    /* we have to do a look-ahead if it's really an assignment */
-    if ((Token == T_NAME) && (*ExprPtr == '=') && (*(ExprPtr + 1) != '=')) {
-	char *name = strdup(Word);
-	VARIABLE *V = FindVariable(name);
-	if (V == NULL) {
-	    SetVariableString(name, "");
-	    V = FindVariable(name);
-	}
-	Parse();
-	Root = NewNode(NULL);
-	Root->Variable = V;
-	Parse();
-	LinkNode(Root, Level03());
-	free(name);
-    } else {
-	Root = Level03();
-    }
-
-    return Root;
-}
-
-
-/* expression lists */
-static NODE *Level01(void)
-{
-    NODE *Root;
-
-    Root = Level02();
-
-    while (Token == T_OPERATOR && Operator == O_LST) {
-	Root = NewNode(Root);
-	Parse();
-	LinkNode(Root, Level02());
-    }
-
-    return Root;
-}
-
-
-static int EvalTree(NODE * Root)
-{
-    int i;
-    int argc;
-    int type = -1;
-    double number = 0.0;
-    double dummy;
-    int freeme = 0;
-    char *string = NULL;
-    char *s1, *s2;
-    RESULT *param[10];
-
-    switch (Root->Token) {
-
-    case T_NUMBER:
-    case T_STRING:
-	/* Root->Result already contains the value */
-	return 0;
-
-    case T_VARIABLE:
-	CopyResult(&Root->Result, Root->Variable->value);
-	return 0;
-
-    case T_FUNCTION:
-	DelResult(Root->Result);
-	/* prepare parameter list */
-	argc = Root->Children;
-	if (argc > 10) {
-	    error("evaluator: more than 10 children (operands) not supported!");
-	    argc = 10;
-	}
-	for (i = 0; i < argc; i++) {
-	    EvalTree(Root->Child[i]);
-	    param[i] = Root->Child[i]->Result;
-	}
-	if (Root->Function->argc < 0) {
-	    /* Function with variable argument list:  */
-	    /* pass number of arguments as first parameter */
-	    Root->Function->func(Root->Result, argc, &param);
-	} else {
-	    Root->Function->func(Root->Result, param[0], param[1], param[2], param[3], param[4], param[5], param[6],
-				 param[7], param[8], param[9]);
-	}
-	return 0;
-
-    case T_OPERATOR:
-	switch (Root->Operator) {
-
-	case O_LST:		/* expression list: result is last expression */
-	    for (i = 0; i < Root->Children; i++) {
-		EvalTree(Root->Child[i]);
-	    }
-	    i = Root->Children - 1;
-	    type = Root->Child[i]->Result->type;
-	    number = Root->Child[i]->Result->number;
-	    string = Root->Child[i]->Result->string;
-	    break;
-
-	case O_SET:		/* variable assignment */
-	    EvalTree(Root->Child[0]);
-	    CopyResult(&Root->Variable->value, Root->Child[0]->Result);
-	    type = Root->Child[0]->Result->type;
-	    number = Root->Child[0]->Result->number;
-	    string = Root->Child[0]->Result->string;
-	    break;
-
-	case O_CND:		/* conditional expression */
-	    EvalTree(Root->Child[0]);
-	    i = 1 + (R2N(Root->Child[0]->Result) == 0.0);
-	    EvalTree(Root->Child[i]);
-	    type = Root->Child[i]->Result->type;
-	    number = Root->Child[i]->Result->number;
-	    string = Root->Child[i]->Result->string;
-	    break;
-
-	case O_OR:		/* logical OR */
-	    type = R_NUMBER;
-	    EvalTree(Root->Child[0]);
-	    if (R2N(Root->Child[0]->Result) == 0.0) {
-		EvalTree(Root->Child[1]);
-		number = (R2N(Root->Child[1]->Result) != 0.0);
-	    } else {
-		number = 1.0;
-	    }
-	    break;
-
-	case O_AND:		/* logical AND */
-	    type = R_NUMBER;
-	    EvalTree(Root->Child[0]);
-	    if (R2N(Root->Child[0]->Result) != 0.0) {
-		EvalTree(Root->Child[1]);
-		number = (R2N(Root->Child[1]->Result) != 0.0);
-	    } else {
-		number = 0.0;
-	    }
-	    break;
-
-	case O_NEQ:		/* numeric equal */
-	    type = R_NUMBER;
-	    EvalTree(Root->Child[0]);
-	    EvalTree(Root->Child[1]);
-	    number = (R2N(Root->Child[0]->Result) == R2N(Root->Child[1]->Result));
-	    break;
-
-	case O_NNE:		/* numeric not equal */
-	    type = R_NUMBER;
-	    EvalTree(Root->Child[0]);
-	    EvalTree(Root->Child[1]);
-	    number = (R2N(Root->Child[0]->Result) != R2N(Root->Child[1]->Result));
-	    break;
-
-	case O_NLT:		/* numeric less than */
-	    type = R_NUMBER;
-	    EvalTree(Root->Child[0]);
-	    EvalTree(Root->Child[1]);
-	    number = (R2N(Root->Child[0]->Result) < R2N(Root->Child[1]->Result));
-	    break;
-
-	case O_NLE:		/* numeric less equal */
-	    type = R_NUMBER;
-	    EvalTree(Root->Child[0]);
-	    EvalTree(Root->Child[1]);
-	    number = (R2N(Root->Child[0]->Result) <= R2N(Root->Child[1]->Result));
-	    break;
-
-	case O_NGT:		/* numeric greater than */
-	    type = R_NUMBER;
-	    EvalTree(Root->Child[0]);
-	    EvalTree(Root->Child[1]);
-	    number = (R2N(Root->Child[0]->Result) > R2N(Root->Child[1]->Result));
-	    break;
-
-	case O_NGE:		/* numeric greater equal */
-	    type = R_NUMBER;
-	    EvalTree(Root->Child[0]);
-	    EvalTree(Root->Child[1]);
-	    number = (R2N(Root->Child[0]->Result) >= R2N(Root->Child[1]->Result));
-	    break;
-
-	case O_SEQ:		/* string equal */
-	    type = R_NUMBER;
-	    EvalTree(Root->Child[0]);
-	    EvalTree(Root->Child[1]);
-	    number = (strcmp(R2S(Root->Child[0]->Result), R2S(Root->Child[1]->Result)) == 0);
-	    break;
-
-	case O_SNE:		/* string not equal */
-	    type = R_NUMBER;
-	    EvalTree(Root->Child[0]);
-	    EvalTree(Root->Child[1]);
-	    number = (strcmp(R2S(Root->Child[0]->Result), R2S(Root->Child[1]->Result)) != 0);
-	    break;
-
-	case O_SLT:		/* string less than */
-	    type = R_NUMBER;
-	    EvalTree(Root->Child[0]);
-	    EvalTree(Root->Child[1]);
-	    number = (strcmp(R2S(Root->Child[0]->Result), R2S(Root->Child[1]->Result)) < 0);
-	    break;
-
-	case O_SLE:		/* string less equal */
-	    type = R_NUMBER;
-	    EvalTree(Root->Child[0]);
-	    EvalTree(Root->Child[1]);
-	    number = (strcmp(R2S(Root->Child[0]->Result), R2S(Root->Child[1]->Result)) <= 0);
-	    break;
-
-	case O_SGT:		/* string greater than */
-	    type = R_NUMBER;
-	    EvalTree(Root->Child[0]);
-	    EvalTree(Root->Child[1]);
-	    number = (strcmp(R2S(Root->Child[0]->Result), R2S(Root->Child[1]->Result)) > 0);
-	    break;
-
-	case O_SGE:		/* string greater equal */
-	    type = R_NUMBER;
-	    EvalTree(Root->Child[0]);
-	    EvalTre