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/* vi:set ts=8 sts=4 sw=4 noet:
*
* VIM - Vi IMproved by Bram Moolenaar
*
* Do ":help uganda" in Vim to read copying and usage conditions.
* Do ":help credits" in Vim to see a list of people who contributed.
* See README.txt for an overview of the Vim source code.
*/
/*
* float.c: Floating point functions
*/
#define USING_FLOAT_STUFF
#include "vim.h"
#if defined(FEAT_EVAL) || defined(PROTO)
#ifdef VMS
# include <float.h>
#endif
/*
* Convert the string "text" to a floating point number.
* This uses strtod(). setlocale(LC_NUMERIC, "C") has been used to make sure
* this always uses a decimal point.
* Returns the length of the text that was consumed.
*/
int
string2float(
char_u *text,
float_T *value, // result stored here
int skip_quotes)
{
char *s = (char *)text;
float_T f;
// MS-Windows does not deal with "inf" and "nan" properly.
if (STRNICMP(text, "inf", 3) == 0)
{
*value = INFINITY;
return 3;
}
if (STRNICMP(text, "-inf", 3) == 0)
{
*value = -INFINITY;
return 4;
}
if (STRNICMP(text, "nan", 3) == 0)
{
*value = NAN;
return 3;
}
if (skip_quotes && vim_strchr((char_u *)s, '\'') != NULL)
{
char_u buf[100];
char_u *p;
int quotes = 0;
vim_strncpy(buf, (char_u *)s, 99);
for (p = buf; ; p = skipdigits(p))
{
// remove single quotes between digits, not in the exponent
if (*p == '\'')
{
++quotes;
mch_memmove(p, p + 1, STRLEN(p));
}
if (!vim_isdigit(*p))
break;
}
s = (char *)buf;
f = strtod(s, &s);
*value = f;
return (int)((char_u *)s - buf) + quotes;
}
f = strtod(s, &s);
*value = f;
return (int)((char_u *)s - text);
}
/*
* Get the float value of "argvars[0]" into "f".
* Returns FAIL when the argument is not a Number or Float.
*/
static int
get_float_arg(typval_T *argvars, float_T *f)
{
if (argvars[0].v_type == VAR_FLOAT)
{
*f = argvars[0].vval.v_float;
return OK;
}
if (argvars[0].v_type == VAR_NUMBER)
{
*f = (float_T)argvars[0].vval.v_number;
return OK;
}
emsg(_(e_number_or_float_required));
return FAIL;
}
/*
* "abs(expr)" function
*/
void
f_abs(typval_T *argvars, typval_T *rettv)
{
if (in_vim9script() && check_for_float_or_nr_arg(argvars, 0) == FAIL)
return;
if (argvars[0].v_type == VAR_FLOAT)
{
rettv->v_type = VAR_FLOAT;
rettv->vval.v_float = fabs(argvars[0].vval.v_float);
}
else
{
varnumber_T n;
int error = FALSE;
n = tv_get_number_chk(&argvars[0], &error);
if (error)
rettv->vval.v_number = -1;
else if (n > 0)
rettv->vval.v_number = n;
else
rettv->vval.v_number = -n;
}
}
/*
* "acos()" function
*/
void
f_acos(typval_T *argvars, typval_T *rettv)
{
float_T f = 0.0;
if (in_vim9script() && check_for_float_or_nr_arg(argvars, 0) == FAIL)
return;
rettv->v_type = VAR_FLOAT;
if (get_float_arg(argvars, &f) == OK)
rettv->vval.v_float = acos(f);
else
rettv->vval.v_float = 0.0;
}
/*
* "asin()" function
*/
void
f_asin(typval_T *argvars, typval_T *rettv)
{
float_T f = 0.0;
if (in_vim9script() && check_for_float_or_nr_arg(argvars, 0) == FAIL)
return;
rettv->v_type = VAR_FLOAT;
if (get_float_arg(argvars, &f) == OK)
rettv->vval.v_float = asin(f);
else
rettv->vval.v_float = 0.0;
}
/*
* "atan()" function
*/
void
f_atan(typval_T *argvars, typval_T *rettv)
{
float_T f = 0.0;
if (in_vim9script() && check_for_float_or_nr_arg(argvars, 0) == FAIL)
return;
rettv->v_type = VAR_FLOAT;
if (get_float_arg(argvars, &f) == OK)
rettv->vval.v_float = atan(f);
else
rettv->vval.v_float = 0.0;
}
/*
* "atan2()" function
*/
void
f_atan2(typval_T *argvars, typval_T *rettv)
{
float_T fx = 0.0, fy = 0.0;
if (in_vim9script()
&& (check_for_float_or_nr_arg(argvars, 0) == FAIL
|| check_for_float_or_nr_arg(argvars, 1) == FAIL))
return;
rettv->v_type = VAR_FLOAT;
if (get_float_arg(argvars, &fx) == OK
&& get_float_arg(&argvars[1], &fy) == OK)
rettv->vval.v_float = atan2(fx, fy);
else
rettv->vval.v_float = 0.0;
}
/*
* "ceil({float})" function
*/
void
f_ceil(typval_T *argvars, typval_T *rettv)
{
float_T f = 0.0;
if (in_vim9script() && check_for_float_or_nr_arg(argvars, 0) == FAIL)
return;
rettv->v_type = VAR_FLOAT;
if (get_float_arg(argvars, &f) == OK)
rettv->vval.v_float = ceil(f);
else
rettv->vval.v_float = 0.0;
}
/*
* "cos()" function
*/
void
f_cos(typval_T *argvars, typval_T *rettv)
{
float_T f = 0.0;
if (in_vim9script() && check_for_float_or_nr_arg(argvars, 0) == FAIL)
return;
rettv->v_type = VAR_FLOAT;
if (get_float_arg(argvars, &f) == OK)
rettv->vval.v_float = cos(f);
else
rettv->vval.v_float = 0.0;
}
/*
* "cosh()" function
*/
void
f_cosh(typval_T *argvars, typval_T *rettv)
{
float_T f = 0.0;
if (in_vim9script() && check_for_float_or_nr_arg(argvars, 0) == FAIL)
return;
rettv->v_type = VAR_FLOAT;
if (get_float_arg(argvars, &f) == OK)
rettv->vval.v_float = cosh(f);
else
rettv->vval.v_float = 0.0;
}
/*
* "exp()" function
*/
void
f_exp(typval_T *argvars, typval_T *rettv)
{
float_T f = 0.0;
if (in_vim9script() && check_for_float_or_nr_arg(argvars, 0) == FAIL)
return;
rettv->v_type = VAR_FLOAT;
if (get_float_arg(argvars, &f) == OK)
rettv->vval.v_float = exp(f);
else
rettv->vval.v_float = 0.0;
}
/*
* "float2nr({float})" function
*/
void
f_float2nr(typval_T *argvars, typval_T *rettv)
{
float_T f = 0.0;
if (in_vim9script() && check_for_float_or_nr_arg(argvars, 0) == FAIL)
return;
if (get_float_arg(argvars, &f) != OK)
return;
if (f <= (float_T)-VARNUM_MAX + DBL_EPSILON)
rettv->vval.v_number = -VARNUM_MAX;
else if (f >= (float_T)VARNUM_MAX - DBL_EPSILON)
rettv->vval.v_number = VARNUM_MAX;
else
rettv->vval.v_number = (varnumber_T)f;
}
/*
* "floor({float})" function
*/
void
f_floor(typval_T *argvars, typval_T *rettv)
{
float_T f = 0.0;
if (in_vim9script() && check_for_float_or_nr_arg(argvars, 0) == FAIL)
return;
rettv->v_type = VAR_FLOAT;
if (get_float_arg(argvars, &f) == OK)
rettv->vval.v_float = floor(f);
else
rettv->vval.v_float = 0.0;
}
/*
* "fmod()" function
*/
void
f_fmod(typval_T *argvars, typval_T *rettv)
{
float_T fx = 0.0, fy = 0.0;
if (in_vim9script()
&& (check_for_float_or_nr_arg(argvars, 0) == FAIL
|| check_for_float_or_nr_arg(argvars, 1) == FAIL))
return;
rettv->v_type = VAR_FLOAT;
if (get_float_arg(argvars, &fx) == OK
&& get_float_arg(&argvars[1], &fy) == OK)
rettv->vval.v_float = fmod(fx, fy);
else
rettv->vval.v_float = 0.0;
}
# if defined(HAVE_MATH_H) || defined(PROTO)
/*
* "isinf()" function
*/
void
f_isinf(typval_T *argvars, typval_T *rettv)
{
if (in_vim9script() && check_for_float_or_nr_arg(argvars, 0) == FAIL)
return;
if (argvars[0].v_type == VAR_FLOAT && isinf(argvars[0].vval.v_float))
rettv->vval.v_number = argvars[0].vval.v_float > 0.0 ? 1 : -1;
}
/*
* "isnan()" function
*/
void
f_isnan(typval_T *argvars, typval_T *rettv)
{
if (in_vim9script() && check_for_float_or_nr_arg(argvars, 0) == FAIL)
return;
rettv->vval.v_number = argvars[0].v_type == VAR_FLOAT
&& isnan(argvars[0].vval.v_float);
}
# endif
/*
* "log()" function
*/
void
f_log(typval_T *argvars, typval_T *rettv)
{
float_T f = 0.0;
if (in_vim9script() && check_for_float_or_nr_arg(argvars, 0) == FAIL)
return;
rettv->v_type = VAR_FLOAT;
if (get_float_arg(argvars, &f) == OK)
rettv->vval.v_float = log(f);
else
rettv->vval.v_float = 0.0;
}
/*
* "log10()" function
*/
void
f_log10(typval_T *argvars, typval_T *rettv)
{
float_T f = 0.0;
if (in_vim9script() && check_for_float_or_nr_arg(argvars, 0) == FAIL)
return;
rettv->v_type = VAR_FLOAT;
if (get_float_arg(argvars, &f) == OK)
rettv->vval.v_float = log10(f);
else
rettv->vval.v_float = 0.0;
}
/*
* "pow()" function
*/
void
f_pow(typval_T *argvars, typval_T *rettv)
{
float_T fx = 0.0, fy = 0.0;
if (in_vim9script()
&& (check_for_float_or_nr_arg(argvars, 0) == FAIL
|| check_for_float_or_nr_arg(argvars, 1) == FAIL))
return;
rettv->v_type = VAR_FLOAT;
if (get_float_arg(argvars, &fx) == OK
&& get_float_arg(&argvars[1], &fy) == OK)
rettv->vval.v_float = pow(fx, fy);
else
rettv->vval.v_float = 0.0;
}
/*
* round() is not in C90, use ceil() or floor() instead.
*/
float_T
vim_round(float_T f)
{
return f > 0 ? floor(f + 0.5) : ceil(f - 0.5);
}
/*
* "round({float})" function
*/
void
f_round(typval_T *argvars, typval_T *rettv)
{
float_T f = 0.0;
if (in_vim9script() && check_for_float_or_nr_arg(argvars, 0) == FAIL)
return;
rettv->v_type = VAR_FLOAT;
if (get_float_arg(argvars, &f) == OK)
rettv->vval.v_float = vim_round(f);
else
rettv->vval.v_float = 0.0;
}
/*
* "sin()" function
*/
void
f_sin(typval_T *argvars, typval_T *rettv)
{
float_T f = 0.0;
if (in_vim9script() && check_for_float_or_nr_arg(argvars, 0) == FAIL)
return;
rettv->v_type = VAR_FLOAT;
if (get_float_arg(argvars, &f) == OK)
rettv->vval.v_float = sin(f);
else
rettv->vval.v_float = 0.0;
}
/*
* "sinh()" function
*/
void
f_sinh(typval_T *argvars, typval_T *rettv)
{
float_T f = 0.0;
if (in_vim9script() && check_for_float_or_nr_arg(argvars, 0) == FAIL)
return;
rettv->v_type = VAR_FLOAT;
if (get_float_arg(argvars, &f) == OK)
rettv->vval.v_float = sinh(f);
else
rettv->vval.v_float = 0.0;
}
/*
* "sqrt()" function
*/
void
f_sqrt(typval_T *argvars, typval_T *rettv)
{
float_T f = 0.0;
if (in_vim9script() && check_for_float_or_nr_arg(argvars, 0) == FAIL)
return;
rettv->v_type = VAR_FLOAT;
if (get_float_arg(argvars, &f) == OK)
rettv->vval.v_float = sqrt(f);
else
rettv->vval.v_float = 0.0;
}
/*
* "str2float()" function
*/
void
f_str2float(typval_T *argvars, typval_T *rettv)
{
char_u *p;
int isneg;
int skip_quotes;
if (in_vim9script() && check_for_string_arg(argvars, 0) == FAIL)
return;
skip_quotes = argvars[1].v_type != VAR_UNKNOWN && tv_get_bool(&argvars[1]);
p = skipwhite(tv_get_string_strict(&argvars[0]));
isneg = (*p == '-');
if (*p == '+' || *p == '-')
p = skipwhite(p + 1);
(void)string2float(p, &rettv->vval.v_float, skip_quotes);
if (isneg)
rettv->vval.v_float *= -1;
rettv->v_type = VAR_FLOAT;
}
/*
* "tan()" function
*/
void
f_tan(typval_T *argvars, typval_T *rettv)
{
float_T f = 0.0;
if (in_vim9script() && check_for_float_or_nr_arg(argvars, 0) == FAIL)
return;
rettv->v_type = VAR_FLOAT;
if (get_float_arg(argvars, &f) == OK)
rettv->vval.v_float = tan(f);
else
rettv->vval.v_float = 0.0;
}
/*
* "tanh()" function
*/
void
f_tanh(typval_T *argvars, typval_T *rettv)
{
float_T f = 0.0;
if (in_vim9script() && check_for_float_or_nr_arg(argvars, 0) == FAIL)
return;
rettv->v_type = VAR_FLOAT;
if (get_float_arg(argvars, &f) == OK)
rettv->vval.v_float = tanh(f);
else
rettv->vval.v_float = 0.0;
}
/*
* "trunc({float})" function
*/
void
f_trunc(typval_T *argvars, typval_T *rettv)
{
float_T f = 0.0;
if (in_vim9script() && check_for_float_or_nr_arg(argvars, 0) == FAIL)
return;
rettv->v_type = VAR_FLOAT;
if (get_float_arg(argvars, &f) == OK)
// trunc() is not in C90, use floor() or ceil() instead.
rettv->vval.v_float = f > 0 ? floor(f) : ceil(f);
else
rettv->vval.v_float = 0.0;
}
#endif
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