enlightenment/efl
enlightenment
/
efl
8
7
Fork 14
Code Issues 13 Pull Requests 3 Projects Releases Wiki Activity

yuri's math code for the parser! 

SVN revision: 9322
This commit is contained in:
Carsten Haitzler 2004-03-11 03:21:06 +00:00
parent 5e58398b21
commit 3c9d0ec692
1 changed files with 464 additions and 4 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

468
legacy/edje/src/bin/edje_cc_parse.c
View File

@ -8,6 +8,30 @@ static char *stack_id(void);
static void stack_chop_top(void);
static void parse(char *data, off_t size);
/* simple expression parsing protos */
static int my_atoi(const char * s);
static char * _alphai(char *s, int * val);
static char * _betai(char *s, int * val);
static char * _gammai(char *s, int * val);
static char * _deltai(char *s, int * val);
static char * _get_numi(char *s, int * val);
static int _is_numi(char c);
static int _is_op1i(char c);
static int _is_op2i(char c);
static int _calci(char op, int a, int b);
static double my_atof(const char * s);
static char * _alphaf(char *s, double * val);
static char * _betaf(char *s, double * val);
static char * _gammaf(char *s, double * val);
static char * _deltaf(char *s, double * val);
static char * _get_numf(char *s, double * val);
static int _is_numf(char c);
static int _is_op1f(char c);
static int _is_op2f(char c);
static double _calcf(char op, double a, double b);
int line = 0;
Evas_List *stack = NULL;
Evas_List *params = NULL;
@ -538,7 +562,7 @@ parse_int(int n)
progname, file_in, line, n + 1);
exit(-1);
}
i = atoi(str);
i = my_atoi(str);
return i;
}
@ -555,7 +579,7 @@ parse_int_range(int n, int f, int t)
progname, file_in, line, n + 1);
exit(-1);
}
i = atoi(str);
i = my_atoi(str);
if ((i < f) || (i > t))
{
fprintf(stderr, "%s: Error. %s:%i integer %i out of range of %i to %i inclusive\n",
@ -578,7 +602,7 @@ parse_float(int n)
progname, file_in, line, n + 1);
exit(-1);
}
i = atof(str);
i = my_atof(str);
return i;
}
@ -595,7 +619,7 @@ parse_float_range(int n, double f, double t)
progname, file_in, line, n + 1);
exit(-1);
}
i = atof(str);
i = my_atof(str);
if ((i < f) || (i > t))
{
fprintf(stderr, "%s: Error. %s:%i float %3.3f out of range of %3.3f to %3.3f inclusive\n",
@ -604,3 +628,439 @@ parse_float_range(int n, double f, double t)
}
return i;
}
/* simple expression parsing stuff */
/*
* alpha ::= beta + beta || beta
* beta ::= gamma + gamma || gamma
* gamma ::= num || delta
* delta ::= '(' alpha ')'
*
* */
/* int set of function */
int my_atoi(const char * s)
{
int res = 0;
char *p, *p_in, *p_out;
char buf[4096];
if (!s)
return 0;
if (4095 < strlen(s))
{
fprintf(stderr, "%s: Error. %s:%i expression is too long\n",
progname, file_in, line);
return 0;
}
/* remove spaces and tabs */
p_in = s;
p_out = buf;
while(*p_in)
{
if((0x20 != *p_in) && (0x09 != *p_in))
{
*p_out = *p_in;
p_out++;
}
p_in++;
}
*p_out = '\0';
p = _alphai(buf, &res);
return res;
}
char * _deltai(char *s, int * val)
{
if (!val) return;
if ('(' != s[0])
{
fprintf(stderr, "%s: Error. %s:%i unexpected character at %s\n",
progname, file_in, line, s);
return s;
}
else
{
s++;
s = _alphai(s, val);
s++;
return s;
}
return s;
}
char * _gammai(char *s, int * val)
{
if (!val) return;
if (_is_numi(s[0]))
{
s = _get_numi(s, val);
return s;
}
else if ( '(' == s[0])
{
s = _deltai(s, val);
return s;
}
else
fprintf(stderr, "%s: Error. %s:%i unexpected character at %s\n",
progname, file_in, line, s);
return s;
}
char * _betai(char *s, int * val)
{
int a1, a2;
char op;
if (!val)
return;
s = _gammai(s, &a1);
while(_is_op1i(s[0]))
{
op = s[0];
s++;
s = _gammai(s, &a2);
a1 = _calci(op, a1, a2);
}
(*val) = a1;
return s;
}
char * _alphai(char *s, int * val)
{
int a1, a2;
char op;
if (!val)
return;
s = _betai(s, &a1);
while(_is_op2i(s[0]))
{
op = s[0];
s++;
s = _betai(s, &a2);
a1 = _calci(op, a1, a2);
}
(*val) = a1;
return s;
}
char * _get_numi(char *s, int * val)
{
char buf[4096];
int pos = 0;
if (!val)
return s;
while (
(('0' <= s[pos]) && ('9' >= s[pos])) ||
((0 == pos) && ('-' == s[pos]))
)
{
buf[pos] = s[pos];
pos++;
}
buf[pos] = '\0';
(*val) = atoi(buf);
return (s+pos);
}
int _is_numi(char c)
{
if (((c >= '0') && (c <= '9')) || ('-' == c) || ('+' == c))
return 1;
else
return 0;
}
int _is_op1i(char c)
{
switch(c)
{
case '*':;
case '/': return 1;
default: return 0;
}
return 0;
}
int _is_op2i(char c)
{
switch(c)
{
case '+':;
case '-': return 1;
default: return 0;
}
return 0;
}
int _calci(char op, int a, int b)
{
switch(op)
{
case '+':
a += b;
return a;
case '-':
a -= b;
return a;
case '/':
if(0 != b)
a /= b;
else
fprintf(stderr, "%s: Error. %s:%i divide by zero\n",
progname, file_in, line);
return a;
case '*':
a *= b;
return a;
default:
fprintf(stderr, "%s: Error. %s:%i unexpected character '%c'\n",
progname, file_in, line, op);
return a;
}
}
/* float set of functoins */
double my_atof(const char * s)
{
double res = 0;
char *p, *p_in, *p_out;
char buf[4096];
if (!s)
return 0;
if (4095 < strlen(s))
{
fprintf(stderr, "%s: Error. %s:%i expression is too long\n",
progname, file_in, line);
return 0;
}
/* remove spaces and tabs */
p_in = s;
p_out = buf;
while(*p_in)
{
if((0x20 != *p_in) && (0x09 != *p_in))
{
*p_out = *p_in;
p_out++;
}
p_in++;
}
*p_out = '\0';
p = _alphaf(buf, &res);
return res;
}
char * _deltaf(char *s, double * val)
{
if (!val) return;
if ('(' != s[0])
{
fprintf(stderr, "%s: Error. %s:%i unexpected character at %s\n",
progname, file_in, line, s);
return s;
}
else
{
s++;
s = _alphaf(s, val);
s++;
return s;
}
return s;
}
char * _gammaf(char *s, double * val)
{
if (!val) return;
if (_is_numf(s[0]))
{
s = _get_numf(s, val);
return s;
}
else if ( '(' == s[0])
{
s = _deltaf(s, val);
return s;
}
else
fprintf(stderr, "%s: Error. %s:%i unexpected character at %s\n",
progname, file_in, line, s);
return s;
}
char * _betaf(char *s, double * val)
{
double a1=0, a2=0;
char op;
if (!val)
return;
s = _gammaf(s, &a1);
while(_is_op1f(s[0]))
{
op = s[0];
s++;
s = _gammaf(s, &a2);
a1 = _calcf(op, a1, a2);
}
(*val) = a1;
return s;
}
char * _alphaf(char *s, double * val)
{
double a1=0, a2=0;
char op;
if (!val)
return;
s = _betaf(s, &a1);
while(_is_op2f(s[0]))
{
op = s[0];
s++;
s = _betaf(s, &a2);
a1 = _calcf(op, a1, a2);
}
(*val) = a1;
return s;
}
char * _get_numf(char *s, double * val)
{
char buf[4096];
int pos = 0;
if (!val)
return s;
while (
(('0' <= s[pos]) && ('9' >= s[pos])) ||
('.' == s[pos]) ||
((0 == pos) && ('-' == s[pos]))
)
{
buf[pos] = s[pos];
pos++;
}
buf[pos] = '\0';
(*val) = atof(buf);
return (s+pos);
}
int _is_numf(char c)
{
if (((c >= '0') && (c <= '9'))
|| ('-' == c)
|| ('.' == c)
|| ('+' == c))
return 1;
else
return 0;
}
int _is_op1f(char c)
{
switch(c)
{
case '*':;
case '/': return 1;
default: return 0;
}
return 0;
}
int _is_op2f(char c)
{
switch(c)
{
case '+':;
case '-': return 1;
default: return 0;
}
return 0;
}
double _calcf(char op, double a, double b)
{
switch(op)
{
case '+':
a += b;
return a;
case '-':
a -= b;
return a;
case '/':
if(0 != b)
a /= b;
else
fprintf(stderr, "%s: Error. %s:%i divide by zero\n",
progname, file_in, line);
return a;
case '*':
a *= b;
return a;
default:
fprintf(stderr, "%s: Error. %s:%i unexpected character '%c'\n",
progname, file_in, line, op);
return a;
}
}