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Sweden-Number/dlls/jscript/number.c

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/*
* Copyright 2008 Jacek Caban for CodeWeavers
*
* This library is free software; you can redistribute it and/or
* modify it under the terms of the GNU Lesser General Public
* License as published by the Free Software Foundation; either
* version 2.1 of the License, or (at your option) any later version.
*
* This library 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
* Lesser General Public License for more details.
*
* You should have received a copy of the GNU Lesser General Public
* License along with this library; if not, write to the Free Software
* Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301, USA
*/
#include "config.h"
#include "wine/port.h"
#include <math.h>
#include <assert.h>
#include "jscript.h"
#include "wine/debug.h"
WINE_DEFAULT_DEBUG_CHANNEL(jscript);
typedef struct {
jsdisp_t dispex;
double value;
} NumberInstance;
static const WCHAR toStringW[] = {'t','o','S','t','r','i','n','g',0};
static const WCHAR toLocaleStringW[] = {'t','o','L','o','c','a','l','e','S','t','r','i','n','g',0};
static const WCHAR toFixedW[] = {'t','o','F','i','x','e','d',0};
static const WCHAR toExponentialW[] = {'t','o','E','x','p','o','n','e','n','t','i','a','l',0};
static const WCHAR toPrecisionW[] = {'t','o','P','r','e','c','i','s','i','o','n',0};
static const WCHAR valueOfW[] = {'v','a','l','u','e','O','f',0};
#define NUMBER_TOSTRING_BUF_SIZE 64
#define NUMBER_DTOA_SIZE 18
static inline NumberInstance *number_from_vdisp(vdisp_t *vdisp)
{
return (NumberInstance*)vdisp->u.jsdisp;
}
static inline NumberInstance *number_this(vdisp_t *jsthis)
{
return is_vclass(jsthis, JSCLASS_NUMBER) ? number_from_vdisp(jsthis) : NULL;
}
static inline void dtoa(double d, WCHAR *buf, int size, int *dec_point)
{
ULONGLONG l;
int i;
/* TODO: this function should print doubles with bigger precision */
assert(size>=2 && size<=NUMBER_DTOA_SIZE && d>=0);
if(d == 0)
*dec_point = 0;
else
*dec_point = floor(log10(d));
l = d*pow(10, size-*dec_point-1);
if(l%10 >= 5)
l = l/10+1;
else
l /= 10;
buf[size-1] = 0;
for(i=size-2; i>=0; i--) {
buf[i] = '0'+l%10;
l /= 10;
}
/* log10 was wrong by 1 or rounding changed number of digits */
if(l) {
(*dec_point)++;
memmove(buf+1, buf, size-2);
buf[0] = '0'+l;
}else if(buf[0]=='0' && buf[1]>='1' && buf[1]<='9') {
(*dec_point)--;
memmove(buf, buf+1, size-2);
buf[size-2] = '0';
}
}
static inline jsstr_t *number_to_fixed(double val, int prec)
{
WCHAR buf[NUMBER_DTOA_SIZE];
int dec_point, size, buf_size, buf_pos;
BOOL neg = FALSE;
jsstr_t *ret;
WCHAR *str;
if(val < 0) {
neg = TRUE;
val = -val;
}
if(val<=-1 || val>=1)
buf_size = log10(val)+prec+2;
else
buf_size = prec+1;
if(buf_size > NUMBER_DTOA_SIZE)
buf_size = NUMBER_DTOA_SIZE;
dtoa(val, buf, buf_size, &dec_point);
dec_point++;
size = 0;
if(neg)
size++;
if(dec_point > 0)
size += dec_point;
else
size++;
if(prec)
size += prec+1;
ret = jsstr_alloc_buf(size);
if(!ret)
return NULL;
str = ret->str;
size = buf_pos = 0;
if(neg)
str[size++] = '-';
if(dec_point > 0) {
for(;buf_pos<buf_size-1 && dec_point; dec_point--)
str[size++] = buf[buf_pos++];
}else {
str[size++] = '0';
}
for(; dec_point>0; dec_point--)
str[size++] = '0';
if(prec) {
str[size++] = '.';
for(; dec_point<0 && prec; dec_point++, prec--)
str[size++] = '0';
for(; buf_pos<buf_size-1 && prec; prec--)
str[size++] = buf[buf_pos++];
for(; prec; prec--) {
str[size++] = '0';
}
}
str[size++] = 0;
return ret;
}
static inline jsstr_t *number_to_exponential(double val, int prec)
{
WCHAR buf[NUMBER_DTOA_SIZE], *pbuf;
int dec_point, size, buf_size, exp_size = 1;
BOOL neg = FALSE;
jsstr_t *ret;
WCHAR *str;
if(val < 0) {
neg = TRUE;
val = -val;
}
buf_size = prec+2;
if(buf_size<2 || buf_size>NUMBER_DTOA_SIZE)
buf_size = NUMBER_DTOA_SIZE;
dtoa(val, buf, buf_size, &dec_point);
buf_size--;
if(prec == -1)
for(; buf_size>1 && buf[buf_size-1]=='0'; buf_size--)
buf[buf_size-1] = 0;
size = 10;
while(dec_point>=size || dec_point<=-size) {
size *= 10;
exp_size++;
}
if(buf_size == 1)
size = buf_size+2+exp_size; /* 2 = strlen(e+) */
else if(prec == -1)
size = buf_size+3+exp_size; /* 3 = strlen(.e+) */
else
size = prec+4+exp_size; /* 4 = strlen(0.e+) */
if(neg)
size++;
ret = jsstr_alloc_buf(size);
if(!ret)
return NULL;
str = ret->str;
size = 0;
pbuf = buf;
if(neg)
str[size++] = '-';
str[size++] = *pbuf++;
if(buf_size != 1) {
str[size++] = '.';
while(*pbuf)
str[size++] = *pbuf++;
for(; prec>buf_size-1; prec--)
str[size++] = '0';
}
str[size++] = 'e';
if(dec_point >= 0) {
str[size++] = '+';
}else {
str[size++] = '-';
dec_point = -dec_point;
}
size += exp_size;
do {
str[--size] = '0'+dec_point%10;
dec_point /= 10;
}while(dec_point>0);
size += exp_size;
str[size] = 0;
return ret;
}
/* ECMA-262 3rd Edition 15.7.4.2 */
static HRESULT Number_toString(script_ctx_t *ctx, vdisp_t *jsthis, WORD flags, unsigned argc, jsval_t *argv,
jsval_t *r)
{
NumberInstance *number;
INT radix = 10;
DOUBLE val;
jsstr_t *str;
HRESULT hres;
TRACE("\n");
if(!(number = number_this(jsthis)))
return throw_type_error(ctx, JS_E_NUMBER_EXPECTED, NULL);
if(argc) {
hres = to_int32(ctx, argv[0], &radix);
if(FAILED(hres))
return hres;
if(radix<2 || radix>36)
return throw_type_error(ctx, JS_E_INVALIDARG, NULL);
}
val = number->value;
if(radix==10 || isnan(val) || isinf(val)) {
hres = to_string(ctx, jsval_number(val), &str);
if(FAILED(hres))
return hres;
}else {
INT idx = 0;
DOUBLE integ, frac, log_radix = 0;
WCHAR buf[NUMBER_TOSTRING_BUF_SIZE+16];
BOOL exp = FALSE;
if(val<0) {
val = -val;
buf[idx++] = '-';
}
while(1) {
integ = floor(val);
frac = val-integ;
if(integ == 0)
buf[idx++] = '0';
while(integ>=1 && idx<NUMBER_TOSTRING_BUF_SIZE) {
buf[idx] = fmod(integ, radix);
if(buf[idx]<10) buf[idx] += '0';
else buf[idx] += 'a'-10;
integ /= radix;
idx++;
}
if(idx<NUMBER_TOSTRING_BUF_SIZE) {
INT beg = buf[0]=='-'?1:0;
INT end = idx-1;
WCHAR wch;
while(end > beg) {
wch = buf[beg];
buf[beg++] = buf[end];
buf[end--] = wch;
}
}
if(idx != NUMBER_TOSTRING_BUF_SIZE) buf[idx++] = '.';
while(frac>0 && idx<NUMBER_TOSTRING_BUF_SIZE) {
frac *= radix;
buf[idx] = fmod(frac, radix);
frac -= buf[idx];
if(buf[idx]<10) buf[idx] += '0';
else buf[idx] += 'a'-10;
idx++;
}
if(idx==NUMBER_TOSTRING_BUF_SIZE && !exp) {
exp = TRUE;
idx = (buf[0]=='-') ? 1 : 0;
log_radix = floor(log(val)/log(radix));
val *= pow(radix, -log_radix);
continue;
}
break;
}
while(buf[idx-1] == '0') idx--;
if(buf[idx-1] == '.') idx--;
if(exp) {
if(log_radix==0)
buf[idx] = 0;
else {
static const WCHAR formatW[] = {'(','e','%','c','%','d',')',0};
WCHAR ch;
if(log_radix<0) {
log_radix = -log_radix;
ch = '-';
}
else ch = '+';
sprintfW(&buf[idx], formatW, ch, (int)log_radix);
}
}
else buf[idx] = '\0';
str = jsstr_alloc(buf);
if(!str)
return E_OUTOFMEMORY;
}
if(r)
*r = jsval_string(str);
else
jsstr_release(str);
return S_OK;
}
static HRESULT Number_toLocaleString(script_ctx_t *ctx, vdisp_t *jsthis, WORD flags, unsigned argc, jsval_t *argv,
jsval_t *r)
{
FIXME("\n");
return E_NOTIMPL;
}
static HRESULT Number_toFixed(script_ctx_t *ctx, vdisp_t *jsthis, WORD flags, unsigned argc, jsval_t *argv,
jsval_t *r)
{
NumberInstance *number;
DOUBLE val;
INT prec = 0;
jsstr_t *str;
HRESULT hres;
TRACE("\n");
if(!(number = number_this(jsthis)))
return throw_type_error(ctx, JS_E_NUMBER_EXPECTED, NULL);
if(argc) {
hres = to_int32(ctx, argv[0], &prec);
if(FAILED(hres))
return hres;
if(prec<0 || prec>20)
return throw_range_error(ctx, JS_E_FRACTION_DIGITS_OUT_OF_RANGE, NULL);
}
val = number->value;
if(isinf(val) || isnan(val)) {
hres = to_string(ctx, jsval_number(val), &str);
if(FAILED(hres))
return hres;
}else {
str = number_to_fixed(val, prec);
if(!str)
return E_OUTOFMEMORY;
}
if(r)
*r = jsval_string(str);
else
jsstr_release(str);
return S_OK;
}
static HRESULT Number_toExponential(script_ctx_t *ctx, vdisp_t *jsthis, WORD flags, unsigned argc, jsval_t *argv,
jsval_t *r)
{
NumberInstance *number;
DOUBLE val;
INT prec = 0;
jsstr_t *str;
HRESULT hres;
TRACE("\n");
if(!(number = number_this(jsthis)))
return throw_type_error(ctx, JS_E_NUMBER_EXPECTED, NULL);
if(argc) {
hres = to_int32(ctx, argv[0], &prec);
if(FAILED(hres))
return hres;
if(prec<0 || prec>20)
return throw_range_error(ctx, JS_E_FRACTION_DIGITS_OUT_OF_RANGE, NULL);
}
val = number->value;
if(isinf(val) || isnan(val)) {
hres = to_string(ctx, jsval_number(val), &str);
if(FAILED(hres))
return hres;
}else {
if(!prec)
prec--;
str = number_to_exponential(val, prec);
if(!str)
return E_OUTOFMEMORY;
}
if(r)
*r = jsval_string(str);
else
jsstr_release(str);
return S_OK;
}
static HRESULT Number_toPrecision(script_ctx_t *ctx, vdisp_t *jsthis, WORD flags, unsigned argc, jsval_t *argv,
jsval_t *r)
{
NumberInstance *number;
INT prec = 0, size;
jsstr_t *str;
DOUBLE val;
HRESULT hres;
if(!(number = number_this(jsthis)))
return throw_type_error(ctx, JS_E_NUMBER_EXPECTED, NULL);
if(argc) {
hres = to_int32(ctx, argv[0], &prec);
if(FAILED(hres))
return hres;
if(prec<1 || prec>21)
return throw_range_error(ctx, JS_E_PRECISION_OUT_OF_RANGE, NULL);
}
val = number->value;
if(isinf(val) || isnan(val) || !prec) {
hres = to_string(ctx, jsval_number(val), &str);
if(FAILED(hres))
return hres;
}else {
if(val != 0)
size = floor(log10(val>0 ? val : -val)) + 1;
else
size = 1;
if(size > prec)
str = number_to_exponential(val, prec-1);
else
str = number_to_fixed(val, prec-size);
if(!str)
return E_OUTOFMEMORY;
}
if(r)
*r = jsval_string(str);
else
jsstr_release(str);
return S_OK;
}
static HRESULT Number_valueOf(script_ctx_t *ctx, vdisp_t *jsthis, WORD flags, unsigned argc, jsval_t *argv,
jsval_t *r)
{
NumberInstance *number;
TRACE("\n");
if(!(number = number_this(jsthis)))
return throw_type_error(ctx, JS_E_NUMBER_EXPECTED, NULL);
if(r)
*r = jsval_number(number->value);
return S_OK;
}
static HRESULT Number_value(script_ctx_t *ctx, vdisp_t *jsthis, WORD flags, unsigned argc, jsval_t *argv,
jsval_t *r)
{
NumberInstance *number = number_from_vdisp(jsthis);
switch(flags) {
case INVOKE_FUNC:
return throw_type_error(ctx, JS_E_FUNCTION_EXPECTED, NULL);
case DISPATCH_PROPERTYGET:
*r = jsval_number(number->value);
break;
default:
FIXME("flags %x\n", flags);
return E_NOTIMPL;
}
return S_OK;
}
static const builtin_prop_t Number_props[] = {
{toExponentialW, Number_toExponential, PROPF_METHOD|1},
{toFixedW, Number_toFixed, PROPF_METHOD},
{toLocaleStringW, Number_toLocaleString, PROPF_METHOD},
{toPrecisionW, Number_toPrecision, PROPF_METHOD|1},
{toStringW, Number_toString, PROPF_METHOD|1},
{valueOfW, Number_valueOf, PROPF_METHOD}
};
static const builtin_info_t Number_info = {
JSCLASS_NUMBER,
{NULL, Number_value, 0},
sizeof(Number_props)/sizeof(*Number_props),
Number_props,
NULL,
NULL
};
static const builtin_info_t NumberInst_info = {
JSCLASS_NUMBER,
{NULL, Number_value, 0},
0, NULL,
NULL,
NULL
};
static HRESULT NumberConstr_value(script_ctx_t *ctx, vdisp_t *jsthis, WORD flags, unsigned argc, jsval_t *argv,
jsval_t *r)
{
double n;
HRESULT hres;
TRACE("\n");
switch(flags) {
case INVOKE_FUNC:
if(!argc) {
if(r)
*r = jsval_number(0);
return S_OK;
}
hres = to_number(ctx, argv[0], &n);
if(FAILED(hres))
return hres;
if(r)
*r = jsval_number(n);
break;
case DISPATCH_CONSTRUCT: {
jsdisp_t *obj;
if(argc) {
hres = to_number(ctx, argv[0], &n);
if(FAILED(hres))
return hres;
}else {
n = 0;
}
hres = create_number(ctx, n, &obj);
if(FAILED(hres))
return hres;
*r = jsval_obj(obj);
break;
}
default:
FIXME("unimplemented flags %x\n", flags);
return E_NOTIMPL;
}
return S_OK;
}
static HRESULT alloc_number(script_ctx_t *ctx, jsdisp_t *object_prototype, NumberInstance **ret)
{
NumberInstance *number;
HRESULT hres;
number = heap_alloc_zero(sizeof(NumberInstance));
if(!number)
return E_OUTOFMEMORY;
if(object_prototype)
hres = init_dispex(&number->dispex, ctx, &Number_info, object_prototype);
else
hres = init_dispex_from_constr(&number->dispex, ctx, &NumberInst_info, ctx->number_constr);
if(FAILED(hres))
return hres;
*ret = number;
return S_OK;
}
HRESULT create_number_constr(script_ctx_t *ctx, jsdisp_t *object_prototype, jsdisp_t **ret)
{
NumberInstance *number;
HRESULT hres;
static const WCHAR NumberW[] = {'N','u','m','b','e','r',0};
hres = alloc_number(ctx, object_prototype, &number);
if(FAILED(hres))
return hres;
number->value = 0;
hres = create_builtin_constructor(ctx, NumberConstr_value, NumberW, NULL,
PROPF_CONSTR|1, &number->dispex, ret);
jsdisp_release(&number->dispex);
return hres;
}
HRESULT create_number(script_ctx_t *ctx, double value, jsdisp_t **ret)
{
NumberInstance *number;
HRESULT hres;
hres = alloc_number(ctx, NULL, &number);
if(FAILED(hres))
return hres;
number->value = value;
*ret = &number->dispex;
return S_OK;
}
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