kolibrios/programs/other/table/parser.cpp
barsuk c24abef1b6 added table sources
git-svn-id: svn://kolibrios.org@990 a494cfbc-eb01-0410-851d-a64ba20cac60
2008-12-29 23:23:33 +00:00

926 lines
14 KiB
C++

#include "func.h"
#include "parser.h"
//#include <math.h>
//#include <stdlib.h>
//#include <stdio.h>
// token types
#define DELIMITER 1
#define VARIABLE 2
#define NUMBER 3
#define FUNCTION 4
#define FINISHED 10
//#define allocmem(x) malloc(x)
//#define freemem(x) free(x)
double epsilon = 1e-6;
// structure for most parser functions
char token[80];
int token_type;
char *prog;
int code; // error code
variable_callback *find_var;
struct double_list
{
double val;
int code; // êîä îøèáêè
double_list *next;
};
double tg(double d)
{
double cosd = cos(d);
if (fabs(cosd) < epsilon)
{
serror(ERR_OVERFLOW);
return 0.0;
}
return sin(d) / cosd;
}
double ctg(double d)
{
double sind = sin(d);
if (fabs(sind) < epsilon)
{
serror(ERR_OVERFLOW);
return 0.0;
}
return cos(d) / sind;
}
double exp(double x)
{
__asm {
fld x
FLDL2E
FMUL
FLD st(0)
FLD1
FXCH
FPREM
F2XM1
fadd
FSCALE
FSTP st(1)
}
}
double log(double x)
{
//return 0.0;
if (x <= 0)
{
serror(ERR_OVERFLOW);
//return 0.0;
__asm {
fldz
}
}
__asm {
FLD1
FLD x
FYL2X
FLDLN2
FMUL
}
}
double sqrt(double x)
{
if (x < 0)
{
serror(ERR_BADPARAM);
__asm {
fldz
}
}
__asm {
fld x
fsqrt
}
}
double atan(double x)
{
serror(ERR_GENERAL);
return 0.0; // â ëîì
}
double pow(double x, double y)
{
return exp(y * log(x)); //
}
double func_pi()
{
return 3.14159265358979;
}
double func_eps()
{
return epsilon;
}
double func_if(double_list *p)
{
double_list *a, *b, *c;
a = p;
b = a->next;
if (!b)
{
serror(ERR_BADPARAM);
return 0.0;
}
c = b->next;
if (!c || c->next)
{
serror(ERR_BADPARAM);
return 0.0;
}
if (a->val != 0.0)
{
if (b->code)
code = b->code;
return b->val;
}
else
{
if (c->code)
code = c->code;
return c->val;
}
}
double sum(double_list *p)
{
double res = 0.0;
while (p)
{
res += p->val;
if (p->code)
code = p->code;
p = p->next;
}
return res;
}
double func_min(double_list *p)
{
if (!p)
serror(ERR_BADPARAM);
double res = p->val;
p = p->next;
while (p)
{
if (p->code)
code = p->code;
if (p->val < res)
res = p->val;
p = p->next;
}
return res;
}
double func_max(double_list *p)
{
if (!p)
serror(ERR_BADPARAM);
double res = p->val;
p = p->next;
while (p)
{
if (p->code)
code = p->code;
if (p->val > res)
res = p->val;
p = p->next;
}
return res;
}
double avg(double_list *p)
{
double res = 0.0;
int count = 0;
while (p)
{
if (p->code)
code = p->code;
res += p->val;
count++;
p = p->next;
}
return res / count;
}
double func_isnull(char *str)
{
if (code != 0)
return 0.0;
double tmp = find_var(str);
int c = code;
code = 0;
if (c != 0)
return 1.0;
return 0.0;
}
const double HALF = 0.5;
double func_ceil(double val) // õîòåë round, à ïîëó÷èëñÿ ceil...
{
int x;
__asm fld val
__asm fld HALF // äà, êðèâîðóêî ^_^
__asm fadd
__asm fistp x
__asm fild x
}
double func_round(double val)
{
int x;
__asm fld val
__asm fld epsilon
__asm fadd
__asm fistp x
__asm fild x
}
const double ALMOST_HALF = 0.5 - epsilon;
double func_floor(double val)
{
int x;
__asm fld val
__asm fld ALMOST_HALF
__asm fsub
__asm fistp x
__asm fild x
}
double logic_xor(double a, double b)
{
if (a == 0.0)
if (b == 0.0)
return 0.0;
else
return 1.0;
else
if (b == 0.0)
return 1.0;
else
return 0.0;
}
double logic_and(double a, double b)
{
if (a == 0.0)
return 0.0;
else
if (b == 0.0)
return 0.0;
else
return 1.0;
}
double logic_or(double a, double b)
{
if (a == 0.0)
if (b == 0.0)
return 0.0;
else
return 1.1;
else
return 1.0;
}
double rand_seed;
double func_rand(double max)
{
double q = (257.0 * rand_seed + 739.0); // ÷èñëà îò áàëäû. íàäî âñòàâèòü ïðàâèëüíûå.
rand_seed = q - 65536.0 * func_floor(q / 65536.0); // äëÿ õîðîøåãî ðàñïðåäåëåíèÿ
return q - max * func_floor(q / max); // äëÿ ìîäóëÿ
}
double func_case(double_list *p)
{
if (!p || !p->next)
{
serror(ERR_BADPARAM);
return 0.0;
}
double x = p->val;
int count = (int)p->next->val;
int i, k;
double_list *cur = p->next->next;
k = count;
for (i = 0; i < count; i++)
{
if (!cur)
{
serror(ERR_BADPARAM);
return 0.0;
}
if (fabs(x - cur->val) < epsilon)
{
if (k != count + 1)
{
serror(ERR_GENERAL);
return 0.0;
}
k = i;
}
cur = cur->next;
}
for (i = 0; i < k; i++)
{
if (!cur)
{
serror(ERR_BADPARAM);
return 0.0;
}
cur = cur->next;
}
if (!cur) // ïðîâåðêè áèï. äîñòàëè áèï.
{
serror(ERR_BADPARAM);
return 0.0;
}
if (cur->code)
code = cur->code;
return cur->val;
}
#define INF_ARGS -1
#define STR_ARG -2
// represents general mathematical function
typedef double(*matfunc0)();
typedef double(*matfunc)(double);
typedef double(*matfunc2)(double,double);
typedef double(*matfunc3)(double,double,double);
typedef double(*matfunc_inf)(double_list*);
typedef double(*matfunc_str)(char*);
// used to link function name to the function
typedef struct
{
char name[10];
int args;
void * f;
} func;
// the list of functions
const int max_func = 29;
func functions[max_func] =
{
"", 1, NULL, // íå ïîìíþ, ñ êàêîé öåëüþ
"sin", 1, &sin,
"cos", 1, &cos,
"exp", 1, &exp,
"sqrt", 1, &sqrt,
"log", 1, &log,
"tg", 1, &tg,
"ctg", 1, &ctg,
"arcsin", 1, &asin,
"arccos", 1, &acos,
"arctg", 1, &atan, // íå ðåàëèçîâàíî. âîçâðàùàåò îøèáêó ERR_GENERAL
"abs", 1, &fabs,
"pow", 2, &pow,
"if", INF_ARGS, &func_if,
"sum",INF_ARGS,&sum,
"isnull",STR_ARG,&func_isnull, // ñëåãêà ÷/æ
"min",INF_ARGS,&func_min,
"max",INF_ARGS,&func_max,
"avg",INF_ARGS,&avg,
"ceil",1,&func_ceil,
"round",1,&func_round,
"floor",1,&func_floor,
"and",2,&logic_and,
"or",2,&logic_or,
"xor",2,&logic_xor,
"rand",1,&func_rand,
"case",INF_ARGS,&func_case,
"pi",0,&func_pi,
"eps",0,&func_eps
};
// all delimiters
#define MAXDELIM 17
const char delim[MAXDELIM]="+-*^/%=;(),><#! "; // not bad words
int isdelim(char c)
{
//return strchr(delim, c) != 0;
for (int i = 0; i < MAXDELIM; i++)
if (c == delim[i])
return 1;
return 0;
}
int isdigit(char c)
{
return (c >= '0' && c <= '9');
}
int isalpha2(char c)
{
return ((c >= 'a' && c <= 'z')
|| (c >= 'A' && c <= 'Z') || (c=='$'));
}
int iswhite(char c)
{
return (c==' ' || c=='\t');
}
void serror(int acode)
{
if (acode != 0)
code = acode;
}
void set_exp(char *exp)
{
prog = exp;
}
int get_token()
{
int tok;
char *temp;
(token_type) = 0;
tok = 0;
temp = (token);
if (*(prog) == '\0')
{
*(token) = 0;
tok = FINISHED;
return ((token_type) = DELIMITER);
}
while (iswhite(*(prog))) ++(prog);
if (isdelim(*(prog)))
{
char t=*temp = *(prog);
(prog)++;
temp++;
if ((t == '>' || t == '<' || t == '!') && (*prog) && (*prog == '='))
{
*temp = *(prog);
(prog)++;
temp++;
}
*temp = 0;
return ((token_type) = DELIMITER);
}
if (isdigit(*(prog)))
{
while (!isdelim(*(prog)))
*temp++=*(prog)++;
*temp = '\0';
return ((token_type) = NUMBER);
}
if (isalpha2(*(prog)))
{
while (!isdelim(*(prog)))
*temp++=*(prog)++;
(token_type) = VARIABLE;
}
*temp = '\0';
if ((token_type) == VARIABLE)
{
tok = look_up((token));
if (tok)
(token_type) = FUNCTION;
}
return (token_type);
}
double sign(double d)
{
if (d > 0.0)
return 1.0;
if (d < 0.0)
return -1.0;
return 0.0;
}
void putback()
{
char *t;
t = (token);
for (;*t;t++)
(prog)--;
}
int get_exp(double *hold)
{
code = 0;
get_token();
if (!*(token))
{
return 0;
}
level1( hold);
putback();
return code==0;
}
void level1(double *hold)
{
char op[2];
double h;
level1_5( hold);
while (op[0] = *token, op[1] = (*(token+1)) ? *(token + 1) : 0,
*op == '<' || *op == '>' || *op == '=' || *op == '#' || *op == '!')
{
get_token();
level1_5( &h);
logic(op, hold, &h);
}
}
void level1_5(double *hold)
{
char op;
op = 0;
if (((token_type) == DELIMITER) && *(token) == '!')
{
op = *(token);
get_token();
}
level2( hold);
if (op)
{
if (*hold == 0.0)
*hold = 1.0;
else
*hold = 0.0;
}
}
void level2(double *hold)
{
char op;
double h;
level3( hold);
while ((op=*(token)) == '+' || op == '-')
{
get_token();
level3( &h);
arith(op, hold, &h);
}
}
void level3(double *hold)
{
char op;
double h;
level4( hold);
while ((op=*(token)) == '*' || op == '/' || op == '%')
{
get_token();
level4( &h);
arith( op, hold, &h);
}
}
void level4(double *hold)
{
double h;
level5( hold);
if (*(token) == '^')
{
get_token();
level5( &h);
arith( '^', hold, &h);
}
}
void level5(double *hold)
{
char op;
op = 0;
if (((token_type) == DELIMITER) && *(token) == '+' || *(token) == '-')
{
op = *(token);
get_token();
}
level6( hold);
if (op)
unary(op, hold);
}
void level6(double *hold)
{
if ((*(token) == '(') && ((token_type) == DELIMITER))
{
get_token();
level1( hold);
if (*(token) != ')')
serror( ERR_NOBRACKET);
get_token();
}
else
primitive( hold);
}
void calc_function(double *hold)
{
double_list *args = NULL, *last = NULL, *t;
double d;
int i,argc=0,save_code;
save_code = code;
code = 0;
i = look_up(token);
if (i == 0)
serror(ERR_BADFUNCTION); // error
get_token();
if (*(token) != '(')
serror(ERR_NOBRACKET); // error
//get_token();
if (functions[i].args == STR_ARG)
{
get_token();
d = ((matfunc_str)(functions[i].f))(token);
*hold = d;
get_token();
if (save_code)
code = save_code;
return;
}
//last = args = (double_list*)malloc(sizeof(double_list));
//args->next = NULL;
//level1(&args->val);
//get_token();
argc=0;
do
{
get_token();
if (*token == ')')
break;
t = (double_list*)allocmem(sizeof(double_list));
code = 0;
level1(&t->val);
t->code = code;
t->next = NULL;
if (last)
last->next = t;
else
args = t;
last = t;
argc++;
} while (*token == ',');
code = save_code;
if (argc != functions[i].args && functions[i].args >= 0)
{
serror(ERR_BADPARAM);
}
else
{
switch (functions[i].args)
{
case 0:
d = ((matfunc0)(functions[i].f))();
break;
case 1:
d = ((matfunc)(functions[i].f))(args->val);
break;
case 2:
d = ((matfunc2)(functions[i].f))(args->val,args->next->val);
break;
case 3:
d = ((matfunc3)(functions[i].f))(args->val,args->next->val,args->next->next->val);
break;
case INF_ARGS:
d = ((matfunc_inf)(functions[i].f))(args);
break;
}
}
t = args;
while (t)
{
args = t->next;
freemem(t);
t = args;
}
*hold = d;
// else
// serror( ERR_OVERFLOW);
}
void primitive(double *hold)
{
switch (token_type)
{
case VARIABLE:
*hold = find_var(token);
get_token();
return;
case NUMBER:
//
*hold = atof((token));
//if (sscanf(token, "%lf", hold) != 1)
*hold = convert(token);
if (convert_error == ERROR)
serror( ERR_BADNUMER);
get_token();
return;
case FUNCTION:
calc_function( hold);
if (*token != ')')
serror(ERR_NOBRACKET);
get_token();
return;
default: // error
return;
}
}
void arith(char op, double *r, double *h)
{
double t;
switch(op)
{
case '-':
*r = *r - *h;
break;
case '+':
*r = *r + *h;
break;
case '*':
*r = *r * *h;
break;
case '/':
if (fabs(*h) < epsilon)
serror( ERR_OVERFLOW);
else
*r = (*r) / (*h);
break;
case '%':
if (fabs(*h) < epsilon)
serror( ERR_OVERFLOW);
else
{
t = func_floor ((*r) / (*h));
*r = *r - (t * (*h));
}
break;
case '^':
*r = pow(*r, *h);
break;
}
}
void logic(char *op, double *r, double *h)
{
double t;
switch (*op)
{
case '<':
if (*(op+1) && *(op+1) == '=')
t = *r <= *h + epsilon ? 1.0 : 0.0;
else
t = *r < *h - epsilon? 1.0 : 0.0;
break;
case '>':
if (*(op+1) && *(op+1) == '=')
t = *r >= *h - epsilon ? 1.0 : 0.0;
else
t = *r > *h + epsilon ? 1.0 : 0.0;
break;
case '=':
t = fabs(*r - *h) <= epsilon ? 1.0 : 0.0;
break;
case '#':
t = fabs(*r - *h) > epsilon ? 1.0 : 0.0;
break;
case '!':
if (*(op+1) && *(op+1) == '=')
t = fabs(*r - *h) > epsilon ? 1.0 : 0.0;
else
serror(ERR_GENERAL);
break;
}
*r = t;
}
void unary(char op, double *r)
{
if (op == '-')
*r = -(*r);
}
bool strcmp(char *s1, char *s2)
{
int i;
if (s1 == NULL)
if (s2 == NULL)
return 0;
else
return 1;
else
if (s2 == NULL)
return 1;
for (i = 0;;i++)
{
if (s1[i] == '\0')
if (s2[i] == '\0')
return 0;
else
return 1;
else
if (s2[i] == '\0')
return 1;
else
{
if (s1[i] != s2[i])
return 1;
}
}
return 0;
}
bool strncmp(char *s1, char *s2, int n)
{
int i;
if (s1 == NULL)
if (s2 == NULL)
return 0;
else
return 1;
else
if (s2 == NULL)
return 1;
for (i = 0;i<n;i++)
{
if (s1[i] == '\0')
if (s2[i] == '\0')
return 0;
else
return 1;
else
if (s2[i] == '\0')
return 1;
else
{
if (s1[i] != s2[i])
return 1;
}
}
return 0;
}
int look_up(char *s)
{
int i;
for (i = 0; i < max_func; i++)
if (strcmp(s, functions[i].name) == 0)
return i;
return 0; // search command/function name
}