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Revision 332 - (hide annotations)
Thu Oct 23 19:03:33 2008 UTC (12 years ago) by siliconforks
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Add SpiderMonkey from Firefox 3.1b1.

The following directories and files were removed:
correct/, correct.js
liveconnect/
nanojit/
t/
v8/
vprof/
xpconnect/
all JavaScript files (Y.js, call.js, if.js, math-partial-sums.js, md5.js, perfect.js, trace-test.js, trace.js)


1 siliconforks 332 /* -*- Mode: C; tab-width: 8; indent-tabs-mode: nil; c-basic-offset: 4 -*-
2     *
3     * ***** BEGIN LICENSE BLOCK *****
4     * Version: MPL 1.1/GPL 2.0/LGPL 2.1
5     *
6     * The contents of this file are subject to the Mozilla Public License Version
7     * 1.1 (the "License"); you may not use this file except in compliance with
8     * the License. You may obtain a copy of the License at
9     * http://www.mozilla.org/MPL/
10     *
11     * Software distributed under the License is distributed on an "AS IS" basis,
12     * WITHOUT WARRANTY OF ANY KIND, either express or implied. See the License
13     * for the specific language governing rights and limitations under the
14     * License.
15     *
16     * The Original Code is Mozilla Communicator client code, released
17     * March 31, 1998.
18     *
19     * The Initial Developer of the Original Code is
20     * Netscape Communications Corporation.
21     * Portions created by the Initial Developer are Copyright (C) 1998
22     * the Initial Developer. All Rights Reserved.
23     *
24     * Contributor(s):
25     *
26     * Alternatively, the contents of this file may be used under the terms of
27     * either of the GNU General Public License Version 2 or later (the "GPL"),
28     * or the GNU Lesser General Public License Version 2.1 or later (the "LGPL"),
29     * in which case the provisions of the GPL or the LGPL are applicable instead
30     * of those above. If you wish to allow use of your version of this file only
31     * under the terms of either the GPL or the LGPL, and not to allow others to
32     * use your version of this file under the terms of the MPL, indicate your
33     * decision by deleting the provisions above and replace them with the notice
34     * and other provisions required by the GPL or the LGPL. If you do not delete
35     * the provisions above, a recipient may use your version of this file under
36     * the terms of any one of the MPL, the GPL or the LGPL.
37     *
38     * ***** END LICENSE BLOCK ***** */
39    
40     #ifndef jsnum_h___
41     #define jsnum_h___
42     /*
43     * JS number (IEEE double) interface.
44     *
45     * JS numbers are optimistically stored in the top 31 bits of 32-bit integers,
46     * but floating point literals, results that overflow 31 bits, and division and
47     * modulus operands and results require a 64-bit IEEE double. These are GC'ed
48     * and pointed to by 32-bit jsvals on the stack and in object properties.
49     */
50    
51     JS_BEGIN_EXTERN_C
52    
53     /*
54     * The ARM architecture supports two floating point models: VFP and FPA. When
55     * targetting FPA, doubles are mixed-endian on little endian ARMs (meaning that
56     * the high and low words are in big endian order).
57     */
58     #if defined(__arm) || defined(__arm32__) || defined(__arm26__) || defined(__arm__)
59     #if !defined(__VFP_FP__)
60     #define FPU_IS_ARM_FPA
61     #endif
62     #endif
63    
64     typedef union jsdpun {
65     struct {
66     #if defined(IS_LITTLE_ENDIAN) && !defined(FPU_IS_ARM_FPA)
67     uint32 lo, hi;
68     #else
69     uint32 hi, lo;
70     #endif
71     } s;
72     uint64 u64;
73     jsdouble d;
74     } jsdpun;
75    
76     #if (__GNUC__ == 2 && __GNUC_MINOR__ > 95) || __GNUC__ > 2
77     /*
78     * This version of the macros is safe for the alias optimizations that gcc
79     * does, but uses gcc-specific extensions.
80     */
81    
82     #define JSDOUBLE_HI32(x) (__extension__ ({ jsdpun u; u.d = (x); u.s.hi; }))
83     #define JSDOUBLE_LO32(x) (__extension__ ({ jsdpun u; u.d = (x); u.s.lo; }))
84     #define JSDOUBLE_SET_HI32(x, y) \
85     (__extension__ ({ jsdpun u; u.d = (x); u.s.hi = (y); (x) = u.d; }))
86     #define JSDOUBLE_SET_LO32(x, y) \
87     (__extension__ ({ jsdpun u; u.d = (x); u.s.lo = (y); (x) = u.d; }))
88    
89     #else /* not or old GNUC */
90    
91     /*
92     * We don't know of any non-gcc compilers that perform alias optimization,
93     * so this code should work.
94     */
95    
96     #if defined(IS_LITTLE_ENDIAN) && !defined(FPU_IS_ARM_FPA)
97     #define JSDOUBLE_HI32(x) (((uint32 *)&(x))[1])
98     #define JSDOUBLE_LO32(x) (((uint32 *)&(x))[0])
99     #else
100     #define JSDOUBLE_HI32(x) (((uint32 *)&(x))[0])
101     #define JSDOUBLE_LO32(x) (((uint32 *)&(x))[1])
102     #endif
103    
104     #define JSDOUBLE_SET_HI32(x, y) (JSDOUBLE_HI32(x)=(y))
105     #define JSDOUBLE_SET_LO32(x, y) (JSDOUBLE_LO32(x)=(y))
106    
107     #endif /* not or old GNUC */
108    
109     #define JSDOUBLE_HI32_SIGNBIT 0x80000000
110     #define JSDOUBLE_HI32_EXPMASK 0x7ff00000
111     #define JSDOUBLE_HI32_MANTMASK 0x000fffff
112    
113     #define JSDOUBLE_IS_NaN(x) \
114     ((JSDOUBLE_HI32(x) & JSDOUBLE_HI32_EXPMASK) == JSDOUBLE_HI32_EXPMASK && \
115     (JSDOUBLE_LO32(x) || (JSDOUBLE_HI32(x) & JSDOUBLE_HI32_MANTMASK)))
116    
117     #define JSDOUBLE_IS_INFINITE(x) \
118     ((JSDOUBLE_HI32(x) & ~JSDOUBLE_HI32_SIGNBIT) == JSDOUBLE_HI32_EXPMASK && \
119     !JSDOUBLE_LO32(x))
120    
121     #define JSDOUBLE_IS_FINITE(x) \
122     ((JSDOUBLE_HI32(x) & JSDOUBLE_HI32_EXPMASK) != JSDOUBLE_HI32_EXPMASK)
123    
124     #define JSDOUBLE_IS_NEGZERO(d) (JSDOUBLE_HI32(d) == JSDOUBLE_HI32_SIGNBIT && \
125     JSDOUBLE_LO32(d) == 0)
126    
127     /*
128     * JSDOUBLE_IS_INT first checks that d is neither NaN nor infinite, to avoid
129     * raising SIGFPE on platforms such as Alpha Linux, then (only if the cast is
130     * safe) leaves i as (jsint)d. This also avoid anomalous NaN floating point
131     * comparisons under MSVC.
132     */
133     #define JSDOUBLE_IS_INT(d, i) (JSDOUBLE_IS_FINITE(d) \
134     && !JSDOUBLE_IS_NEGZERO(d) \
135     && ((d) == (i = (jsint)(d))))
136    
137     #if defined(XP_WIN)
138     #define JSDOUBLE_COMPARE(LVAL, OP, RVAL, IFNAN) \
139     ((JSDOUBLE_IS_NaN(LVAL) || JSDOUBLE_IS_NaN(RVAL)) \
140     ? (IFNAN) \
141     : (LVAL) OP (RVAL))
142     #else
143     #define JSDOUBLE_COMPARE(LVAL, OP, RVAL, IFNAN) ((LVAL) OP (RVAL))
144     #endif
145    
146     extern jsdouble js_NaN;
147    
148     /* Initialize number constants and runtime state for the first context. */
149     extern JSBool
150     js_InitRuntimeNumberState(JSContext *cx);
151    
152     extern void
153     js_TraceRuntimeNumberState(JSTracer *trc);
154    
155     extern void
156     js_FinishRuntimeNumberState(JSContext *cx);
157    
158     /* Initialize the Number class, returning its prototype object. */
159     extern JSClass js_NumberClass;
160    
161     extern JSObject *
162     js_InitNumberClass(JSContext *cx, JSObject *obj);
163    
164     /*
165     * String constants for global function names, used in jsapi.c and jsnum.c.
166     */
167     extern const char js_Infinity_str[];
168     extern const char js_NaN_str[];
169     extern const char js_isNaN_str[];
170     extern const char js_isFinite_str[];
171     extern const char js_parseFloat_str[];
172     extern const char js_parseInt_str[];
173    
174     /*
175     * vp must be a root.
176     */
177     extern JSBool
178     js_NewNumberInRootedValue(JSContext *cx, jsdouble d, jsval *vp);
179    
180     /* Convert a number to a GC'ed string. */
181     extern JSString * JS_FASTCALL
182     js_NumberToString(JSContext *cx, jsdouble d);
183    
184     /*
185     * Convert int to C string. The buf must be big enough for MIN_INT to fit
186     * including '-' and '\0'.
187     */
188     char *
189     js_IntToCString(jsint i, char *buf, size_t bufSize);
190    
191     /*
192     * Convert a number to C string. The buf must be at least
193     * DTOSTR_STANDARD_BUFFER_SIZE.
194     */
195     char *
196     js_NumberToCString(JSContext *cx, jsdouble d, char *buf, size_t bufSize);
197    
198     /*
199     * Convert a value to a number. On exit JSVAL_IS_NULL(*vp) iff there was an
200     * error. If on exit JSVAL_IS_NUMBER(*vp), then *vp holds the jsval that
201     * matches the result. Otherwise *vp is JSVAL_TRUE indicating that the jsval
202     * for result has to be created explicitly using, for example, the
203     * js_NewNumberInRootedValue function.
204     */
205     extern jsdouble
206     js_ValueToNumber(JSContext *cx, jsval* vp);
207    
208     /*
209     * Convert a value to an int32 or uint32, according to the ECMA rules for
210     * ToInt32 and ToUint32. On exit JSVAL_IS_NULL(*vp) iff there was an error. If
211     * on exit JSVAL_IS_INT(*vp), then *vp holds the jsval matching the result.
212     * Otherwise *vp is JSVAL_TRUE indicating that the jsval for result has to be
213     * created explicitly using, for example, the js_NewNumberInRootedValue
214     * function.
215     */
216     extern int32
217     js_ValueToECMAInt32(JSContext *cx, jsval *vp);
218    
219     extern uint32
220     js_ValueToECMAUint32(JSContext *cx, jsval *vp);
221    
222     /*
223     * Specialized ToInt32 and ToUint32 converters for doubles.
224     */
225     extern int32
226     js_DoubleToECMAInt32(jsdouble d);
227    
228     extern uint32
229     js_DoubleToECMAUint32(jsdouble d);
230    
231     /*
232     * Convert a value to a number, then to an int32 if it fits by rounding to
233     * nearest; but failing with an error report if the double is out of range
234     * or unordered. On exit JSVAL_IS_NULL(*vp) iff there was an error. If on exit
235     * JSVAL_IS_INT(*vp), then *vp holds the jsval matching the result. Otherwise
236     * *vp is JSVAL_TRUE indicating that the jsval for result has to be created
237     * explicitly using, for example, the js_NewNumberInRootedValue function.
238     */
239     extern int32
240     js_ValueToInt32(JSContext *cx, jsval *vp);
241    
242     /*
243     * Convert a value to a number, then to a uint16 according to the ECMA rules
244     * for ToUint16. On exit JSVAL_IS_NULL(*vp) iff there was an error, otherwise
245     * vp is jsval matching the result.
246     */
247     extern uint16
248     js_ValueToUint16(JSContext *cx, jsval *vp);
249    
250     /*
251     * Convert a jsdouble to an integral number, stored in a jsdouble.
252     * If d is NaN, return 0. If d is an infinity, return it without conversion.
253     */
254     extern jsdouble
255     js_DoubleToInteger(jsdouble d);
256    
257     /*
258     * Similar to strtod except that it replaces overflows with infinities of the
259     * correct sign, and underflows with zeros of the correct sign. Guaranteed to
260     * return the closest double number to the given input in dp.
261     *
262     * Also allows inputs of the form [+|-]Infinity, which produce an infinity of
263     * the appropriate sign. The case of the "Infinity" string must match exactly.
264     * If the string does not contain a number, set *ep to s and return 0.0 in dp.
265     * Return false if out of memory.
266     */
267     extern JSBool
268     js_strtod(JSContext *cx, const jschar *s, const jschar *send,
269     const jschar **ep, jsdouble *dp);
270    
271     /*
272     * Similar to strtol except that it handles integers of arbitrary size.
273     * Guaranteed to return the closest double number to the given input when radix
274     * is 10 or a power of 2. Callers may see round-off errors for very large
275     * numbers of a different radix than 10 or a power of 2.
276     *
277     * If the string does not contain a number, set *ep to s and return 0.0 in dp.
278     * Return false if out of memory.
279     */
280     extern JSBool
281     js_strtointeger(JSContext *cx, const jschar *s, const jschar *send,
282     const jschar **ep, jsint radix, jsdouble *dp);
283    
284     JS_END_EXTERN_C
285    
286     #endif /* jsnum_h___ */

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