mirror of
https://github.com/KolibriOS/kolibrios.git
synced 2024-12-29 09:49:41 +03:00
929 lines
14 KiB
C++
929 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 ALMOST_HALF;
|
|
extern void ALMOST_HALF_init(void)
|
|
{ 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
|
|
}
|
|
|