зеркало из https://github.com/mozilla/pjs.git
bug 450392 - fixing -Wstrict-aliasing warnings, r=crowder
This commit is contained in:
Igor Bukanov
Родитель
92b66a1337
Коммит
24b731fa18
101
js/src/dtoa.c
101
js/src/dtoa.c
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@ -1,3 +1,4 @@
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/* -*- Mode: C; tab-width: 8; indent-tabs-mode: t; c-basic-offset: 8 -*- */
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/****************************************************************
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*
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* The author of this software is David M. Gay.
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@ -141,11 +142,6 @@
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* floating-point numbers and flushes underflows to zero rather
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* than implementing gradual underflow, then you must also #define
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* Sudden_Underflow.
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* #define YES_ALIAS to permit aliasing certain double values with
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* arrays of ULongs. This leads to slightly better code with
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* some compilers and was always used prior to 19990916, but it
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* is not strictly legal and can cause trouble with aggressively
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* optimizing compilers (e.g., gcc 2.95.1 under -O2).
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* #define USE_LOCALE to use the current locale's decimal_point value.
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* #define SET_INEXACT if IEEE arithmetic is being used and extra
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* computation should be done to set the inexact flag when the
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@ -277,24 +273,13 @@ Exactly one of IEEE_8087, IEEE_MC68k, VAX, or IBM should be defined.
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typedef union { double d; ULong L[2]; } U;
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#ifdef YES_ALIAS
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#define dval(x) x
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#define dval(x) ((x).d)
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#ifdef IEEE_8087
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#define word0(x) ((ULong *)&x)[1]
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#define word1(x) ((ULong *)&x)[0]
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#define word0(x) ((x).L[1])
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#define word1(x) ((x).L[0])
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#else
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#define word0(x) ((ULong *)&x)[0]
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#define word1(x) ((ULong *)&x)[1]
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#endif
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#else
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#ifdef IEEE_8087
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#define word0(x) ((U*)&x)->L[1]
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#define word1(x) ((U*)&x)->L[0]
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#else
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#define word0(x) ((U*)&x)->L[0]
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#define word1(x) ((U*)&x)->L[1]
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#endif
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#define dval(x) ((U*)&x)->d
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#define word0(x) ((x).L[0])
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#define word1(x) ((x).L[1])
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#endif
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/* The following definition of Storeinc is appropriate for MIPS processors.
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@ -1103,13 +1088,13 @@ diff
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static double
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ulp
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#ifdef KR_headers
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(x) double x;
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(x) U x;
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#else
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(double x)
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(U x)
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#endif
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{
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register Long L;
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double a;
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U a;
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L = (word0(x) & Exp_mask) - (P-1)*Exp_msk1;
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#ifndef Avoid_Underflow
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@ -1152,7 +1137,7 @@ b2d
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{
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ULong *xa, *xa0, w, y, z;
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int k;
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double d;
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U d;
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#ifdef VAX
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ULong d0, d1;
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#else
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@ -1215,9 +1200,9 @@ b2d
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static Bigint *
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d2b
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#ifdef KR_headers
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(d, e, bits) double d; int *e, *bits;
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(d, e, bits) U d; int *e, *bits;
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#else
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(double d, int *e, int *bits)
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(U d, int *e, int *bits)
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#endif
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{
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Bigint *b;
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@ -1358,7 +1343,7 @@ ratio
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(Bigint *a, Bigint *b)
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#endif
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{
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double da, db;
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U da, db;
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int k, ka, kb;
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dval(da) = b2d(a, &ka);
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@ -1463,9 +1448,9 @@ match
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static void
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hexnan
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#ifdef KR_headers
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(rvp, sp) double *rvp; CONST char **sp;
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(rvp, sp) U *rvp; CONST char **sp;
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#else
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(double *rvp, CONST char **sp)
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(U *rvp, CONST char **sp)
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#endif
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{
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ULong c, x[2];
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@ -1545,7 +1530,8 @@ _strtod
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int bb2, bb5, bbe, bd2, bd5, bbbits, bs2, c, dsign,
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e, e1, esign, i, j, k, nd, nd0, nf, nz, nz0, sign;
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CONST char *s, *s0, *s1;
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double aadj, aadj1, adj, rv, rv0;
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double aadj, adj;
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U aadj1, rv, rv0;
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Long L;
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ULong y, z;
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Bigint *bb, *bb1, *bd, *bd0, *bs, *delta;
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@ -1962,7 +1948,7 @@ _strtod
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for(;;) {
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bd = Balloc(bd0->k);
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Bcopy(bd, bd0);
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bb = d2b(dval(rv), &bbe, &bbbits); /* rv = bb * 2^bbe */
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bb = d2b(rv, &bbe, &bbbits); /* rv = bb * 2^bbe */
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bs = i2b(1);
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if (e >= 0) {
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@ -2079,13 +2065,13 @@ _strtod
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if ((word0(rv) & Exp_mask) <=
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P*Exp_msk1) {
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word0(rv) += P*Exp_msk1;
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dval(rv) += adj*ulp(dval(rv));
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dval(rv) += adj*ulp(rv);
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word0(rv) -= P*Exp_msk1;
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}
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else
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#endif /*Sudden_Underflow*/
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#endif /*Avoid_Underflow*/
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dval(rv) += adj*ulp(dval(rv));
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dval(rv) += adj*ulp(rv);
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}
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break;
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}
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@ -2108,7 +2094,7 @@ _strtod
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#ifdef Sudden_Underflow
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if ((word0(rv) & Exp_mask) <= P*Exp_msk1) {
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word0(rv) += P*Exp_msk1;
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adj *= ulp(dval(rv));
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adj *= ulp(rv);
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if (dsign)
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dval(rv) += adj;
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else
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@ -2118,7 +2104,7 @@ _strtod
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}
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#endif /*Sudden_Underflow*/
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#endif /*Avoid_Underflow*/
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adj *= ulp(dval(rv));
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adj *= ulp(rv);
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if (dsign)
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dval(rv) += adj;
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else
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@ -2227,10 +2213,10 @@ _strtod
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break;
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#endif
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if (dsign)
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dval(rv) += ulp(dval(rv));
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dval(rv) += ulp(rv);
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#ifndef ROUND_BIASED
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else {
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dval(rv) -= ulp(dval(rv));
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dval(rv) -= ulp(rv);
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#ifndef Sudden_Underflow
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if (!dval(rv))
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goto undfl;
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@ -2244,14 +2230,14 @@ _strtod
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}
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if ((aadj = ratio(delta, bs)) <= 2.) {
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if (dsign)
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aadj = aadj1 = 1.;
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aadj = dval(aadj1) = 1.;
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else if (word1(rv) || word0(rv) & Bndry_mask) {
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#ifndef Sudden_Underflow
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if (word1(rv) == Tiny1 && !word0(rv))
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goto undfl;
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#endif
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aadj = 1.;
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aadj1 = -1.;
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dval(aadj1) = -1.;
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}
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else {
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/* special case -- power of FLT_RADIX to be */
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@ -2261,24 +2247,24 @@ _strtod
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aadj = 1./FLT_RADIX;
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else
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aadj *= 0.5;
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aadj1 = -aadj;
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dval(aadj1) = -aadj;
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}
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}
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else {
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aadj *= 0.5;
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aadj1 = dsign ? aadj : -aadj;
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dval(aadj1) = dsign ? aadj : -aadj;
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#ifdef Check_FLT_ROUNDS
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switch(Rounding) {
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case 2: /* towards +infinity */
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aadj1 -= 0.5;
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dval(aadj1) -= 0.5;
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break;
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case 0: /* towards 0 */
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case 3: /* towards -infinity */
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aadj1 += 0.5;
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dval(aadj1) += 0.5;
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}
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#else
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if (Flt_Rounds == 0)
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aadj1 += 0.5;
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dval(aadj1) += 0.5;
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#endif /*Check_FLT_ROUNDS*/
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}
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y = word0(rv) & Exp_mask;
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@ -2288,7 +2274,7 @@ _strtod
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if (y == Exp_msk1*(DBL_MAX_EXP+Bias-1)) {
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dval(rv0) = dval(rv);
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word0(rv) -= P*Exp_msk1;
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adj = aadj1 * ulp(dval(rv));
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adj = dval(aadj1) * ulp(rv);
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dval(rv) += adj;
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if ((word0(rv) & Exp_mask) >=
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Exp_msk1*(DBL_MAX_EXP+Bias-P)) {
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@ -2308,18 +2294,18 @@ _strtod
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if ((z = (ULong) aadj) <= 0)
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z = 1;
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aadj = z;
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aadj1 = dsign ? aadj : -aadj;
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dval(aadj1) = dsign ? aadj : -aadj;
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}
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word0(aadj1) += (2*P+1)*Exp_msk1 - y;
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}
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adj = aadj1 * ulp(dval(rv));
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adj = dval(aadj1) * ulp(rv);
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dval(rv) += adj;
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#else
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#ifdef Sudden_Underflow
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if ((word0(rv) & Exp_mask) <= P*Exp_msk1) {
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dval(rv0) = dval(rv);
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word0(rv) += P*Exp_msk1;
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adj = aadj1 * ulp(dval(rv));
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adj = dval(aadj1) * ulp(rv);
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dval(rv) += adj;
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#ifdef IBM
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if ((word0(rv) & Exp_mask) < P*Exp_msk1)
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@ -2338,7 +2324,7 @@ _strtod
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word0(rv) -= P*Exp_msk1;
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}
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else {
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adj = aadj1 * ulp(dval(rv));
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adj = dval(aadj1) * ulp(rv);
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dval(rv) += adj;
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}
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#else /*Sudden_Underflow*/
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@ -2350,11 +2336,11 @@ _strtod
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* example: 1.2e-307 .
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*/
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if (y <= (P-1)*Exp_msk1 && aadj > 1.) {
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aadj1 = (double)(int)(aadj + 0.5);
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dval(aadj1) = (double)(int)(aadj + 0.5);
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if (!dsign)
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aadj1 = -aadj1;
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dval(aadj1) = -dval(aadj1);
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}
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adj = aadj1 * ulp(dval(rv));
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adj = dval(aadj1) * ulp(rv);
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dval(rv) += adj;
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#endif /*Sudden_Underflow*/
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#endif /*Avoid_Underflow*/
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@ -2646,9 +2632,9 @@ freedtoa(char *s)
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dtoa
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#ifdef KR_headers
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(d, mode, ndigits, decpt, sign, rve)
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double d; int mode, ndigits, *decpt, *sign; char **rve;
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U d; int mode, ndigits, *decpt, *sign; char **rve;
|
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#else
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(double d, int mode, int ndigits, int *decpt, int *sign, char **rve)
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(U d, int mode, int ndigits, int *decpt, int *sign, char **rve)
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#endif
|
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{
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/* Arguments ndigits, decpt, sign are similar to those
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|
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@ -2694,7 +2680,8 @@ dtoa
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ULong x;
|
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#endif
|
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Bigint *b, *b1, *delta, *mlo, *mhi, *S;
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double d2, ds, eps;
|
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U d2, eps;
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double ds;
|
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char *s, *s0;
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#ifdef Honor_FLT_ROUNDS
|
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int rounding;
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@ -2761,7 +2748,7 @@ dtoa
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}
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#endif
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b = d2b(dval(d), &be, &bbits);
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b = d2b(d, &be, &bbits);
|
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#ifdef Sudden_Underflow
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i = (int)(word0(d) >> Exp_shift1 & (Exp_mask>>Exp_shift1));
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#else
|
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|
|
|
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|
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@ -1361,10 +1361,12 @@ JS_InitStandardClasses(JSContext *cx, JSObject *obj)
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js_InitDateClass(cx, obj);
|
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}
|
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|
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#define CLASP(name) ((JSClass *)&js_##name##Class)
|
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#define CLASP(name) (&js_##name##Class)
|
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#define EXT_CLASP(name) (&js_##name##Class.base)
|
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#define EAGER_ATOM(name) ATOM_OFFSET(name), NULL
|
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#define EAGER_CLASS_ATOM(name) CLASS_ATOM_OFFSET(name), NULL
|
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#define EAGER_ATOM_AND_CLASP(name) EAGER_CLASS_ATOM(name), CLASP(name)
|
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#define EAGER_ATOM_AND_EXT_CLASP(name) EAGER_CLASS_ATOM(name), EXT_CLASP(name)
|
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#define LAZY_ATOM(name) ATOM_OFFSET(lazy.name), js_##name##_str
|
||||
|
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typedef struct JSStdName {
|
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|
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@ -1415,8 +1417,8 @@ static JSStdName standard_class_atoms[] = {
|
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#endif
|
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#if JS_HAS_XML_SUPPORT
|
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{js_InitXMLClass, EAGER_ATOM_AND_CLASP(XML)},
|
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{js_InitNamespaceClass, EAGER_ATOM_AND_CLASP(Namespace)},
|
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{js_InitQNameClass, EAGER_ATOM_AND_CLASP(QName)},
|
||||
{js_InitNamespaceClass, EAGER_ATOM_AND_EXT_CLASP(Namespace)},
|
||||
{js_InitQNameClass, EAGER_ATOM_AND_EXT_CLASP(QName)},
|
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#endif
|
||||
#if JS_HAS_FILE_OBJECT
|
||||
{js_InitFileClass, EAGER_ATOM_AND_CLASP(File)},
|
||||
|
|
|
|||
|
|
@ -510,9 +510,7 @@ js_ContextIterator(JSRuntime *rt, JSBool unlocked, JSContext **iterp)
|
|||
|
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if (unlocked)
|
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JS_LOCK_GC(rt);
|
||||
if (!cx)
|
||||
cx = (JSContext *)&rt->contextList;
|
||||
cx = (JSContext *)cx->links.next;
|
||||
cx = (JSContext *) (cx ? cx->links.next : rt->contextList.next);
|
||||
if (&cx->links == &rt->contextList)
|
||||
cx = NULL;
|
||||
*iterp = cx;
|
||||
|
|
|
|||
|
|
@ -86,7 +86,7 @@ FindTrap(JSRuntime *rt, JSScript *script, jsbytecode *pc)
|
|||
JSTrap *trap;
|
||||
|
||||
for (trap = (JSTrap *)rt->trapList.next;
|
||||
trap != (JSTrap *)&rt->trapList;
|
||||
&trap->links != &rt->trapList;
|
||||
trap = (JSTrap *)trap->links.next) {
|
||||
if (trap->script == script && trap->pc == pc)
|
||||
return trap;
|
||||
|
|
@ -105,7 +105,8 @@ js_UntrapScriptCode(JSContext *cx, JSScript *script)
|
|||
rt = cx->runtime;
|
||||
DBG_LOCK(rt);
|
||||
for (trap = (JSTrap *)rt->trapList.next;
|
||||
trap != (JSTrap *)&rt->trapList;
|
||||
&trap->links !=
|
||||
&rt->trapList;
|
||||
trap = (JSTrap *)trap->links.next) {
|
||||
if (trap->script == script &&
|
||||
(size_t)(trap->pc - script->code) < script->length) {
|
||||
|
|
@ -240,7 +241,7 @@ JS_ClearScriptTraps(JSContext *cx, JSScript *script)
|
|||
rt = cx->runtime;
|
||||
DBG_LOCK(rt);
|
||||
for (trap = (JSTrap *)rt->trapList.next;
|
||||
trap != (JSTrap *)&rt->trapList;
|
||||
&trap->links != &rt->trapList;
|
||||
trap = next) {
|
||||
next = (JSTrap *)trap->links.next;
|
||||
if (trap->script == script) {
|
||||
|
|
@ -264,7 +265,7 @@ JS_ClearAllTraps(JSContext *cx)
|
|||
rt = cx->runtime;
|
||||
DBG_LOCK(rt);
|
||||
for (trap = (JSTrap *)rt->trapList.next;
|
||||
trap != (JSTrap *)&rt->trapList;
|
||||
&trap->links != &rt->trapList;
|
||||
trap = next) {
|
||||
next = (JSTrap *)trap->links.next;
|
||||
sample = rt->debuggerMutations;
|
||||
|
|
@ -430,7 +431,7 @@ js_TraceWatchPoints(JSTracer *trc, JSObject *obj)
|
|||
rt = trc->context->runtime;
|
||||
|
||||
for (wp = (JSWatchPoint *)rt->watchPointList.next;
|
||||
wp != (JSWatchPoint *)&rt->watchPointList;
|
||||
&wp->links != &rt->watchPointList;
|
||||
wp = (JSWatchPoint *)wp->links.next) {
|
||||
if (wp->object == obj) {
|
||||
TRACE_SCOPE_PROPERTY(trc, wp->sprop);
|
||||
|
|
@ -454,7 +455,7 @@ js_SweepWatchPoints(JSContext *cx)
|
|||
rt = cx->runtime;
|
||||
DBG_LOCK(rt);
|
||||
for (wp = (JSWatchPoint *)rt->watchPointList.next;
|
||||
wp != (JSWatchPoint *)&rt->watchPointList;
|
||||
&wp->links != &rt->watchPointList;
|
||||
wp = next) {
|
||||
next = (JSWatchPoint *)wp->links.next;
|
||||
if (js_IsAboutToBeFinalized(cx, wp->object)) {
|
||||
|
|
@ -481,7 +482,7 @@ FindWatchPoint(JSRuntime *rt, JSScope *scope, jsid id)
|
|||
JSWatchPoint *wp;
|
||||
|
||||
for (wp = (JSWatchPoint *)rt->watchPointList.next;
|
||||
wp != (JSWatchPoint *)&rt->watchPointList;
|
||||
&wp->links != &rt->watchPointList;
|
||||
wp = (JSWatchPoint *)wp->links.next) {
|
||||
if (wp->object == scope->object && wp->sprop->id == id)
|
||||
return wp;
|
||||
|
|
@ -517,7 +518,7 @@ js_GetWatchedSetter(JSRuntime *rt, JSScope *scope,
|
|||
if (scope)
|
||||
DBG_LOCK(rt);
|
||||
for (wp = (JSWatchPoint *)rt->watchPointList.next;
|
||||
wp != (JSWatchPoint *)&rt->watchPointList;
|
||||
&wp->links != &rt->watchPointList;
|
||||
wp = (JSWatchPoint *)wp->links.next) {
|
||||
if ((!scope || wp->object == scope->object) && wp->sprop == sprop) {
|
||||
setter = wp->setter;
|
||||
|
|
@ -542,7 +543,7 @@ js_watch_set(JSContext *cx, JSObject *obj, jsval id, jsval *vp)
|
|||
rt = cx->runtime;
|
||||
DBG_LOCK(rt);
|
||||
for (wp = (JSWatchPoint *)rt->watchPointList.next;
|
||||
wp != (JSWatchPoint *)&rt->watchPointList;
|
||||
&wp->links != &rt->watchPointList;
|
||||
wp = (JSWatchPoint *)wp->links.next) {
|
||||
sprop = wp->sprop;
|
||||
if (wp->object == obj && SPROP_USERID(sprop) == id &&
|
||||
|
|
@ -860,7 +861,7 @@ JS_ClearWatchPoint(JSContext *cx, JSObject *obj, jsval id,
|
|||
rt = cx->runtime;
|
||||
DBG_LOCK(rt);
|
||||
for (wp = (JSWatchPoint *)rt->watchPointList.next;
|
||||
wp != (JSWatchPoint *)&rt->watchPointList;
|
||||
&wp->links != &rt->watchPointList;
|
||||
wp = (JSWatchPoint *)wp->links.next) {
|
||||
if (wp->object == obj && SPROP_USERID(wp->sprop) == id) {
|
||||
if (handlerp)
|
||||
|
|
@ -888,7 +889,7 @@ JS_ClearWatchPointsForObject(JSContext *cx, JSObject *obj)
|
|||
rt = cx->runtime;
|
||||
DBG_LOCK(rt);
|
||||
for (wp = (JSWatchPoint *)rt->watchPointList.next;
|
||||
wp != (JSWatchPoint *)&rt->watchPointList;
|
||||
&wp->links != &rt->watchPointList;
|
||||
wp = next) {
|
||||
next = (JSWatchPoint *)wp->links.next;
|
||||
if (wp->object == obj) {
|
||||
|
|
@ -914,7 +915,7 @@ JS_ClearAllWatchPoints(JSContext *cx)
|
|||
rt = cx->runtime;
|
||||
DBG_LOCK(rt);
|
||||
for (wp = (JSWatchPoint *)rt->watchPointList.next;
|
||||
wp != (JSWatchPoint *)&rt->watchPointList;
|
||||
&wp->links != &rt->watchPointList;
|
||||
wp = next) {
|
||||
next = (JSWatchPoint *)wp->links.next;
|
||||
sample = rt->debuggerMutations;
|
||||
|
|
|
|||
|
|
@ -139,8 +139,9 @@ JS_strtod(const char *s00, char **se, int *err)
|
|||
}
|
||||
|
||||
JS_FRIEND_API(char *)
|
||||
JS_dtostr(char *buffer, size_t bufferSize, JSDToStrMode mode, int precision, double d)
|
||||
JS_dtostr(char *buffer, size_t bufferSize, JSDToStrMode mode, int precision, double dinput)
|
||||
{
|
||||
U d;
|
||||
int decPt; /* Offset of decimal point from first digit */
|
||||
int sign; /* Nonzero if the sign bit was set in d */
|
||||
int nDigits; /* Number of significand digits returned by js_dtoa */
|
||||
|
|
@ -155,10 +156,11 @@ JS_dtostr(char *buffer, size_t bufferSize, JSDToStrMode mode, int precision, dou
|
|||
* Change mode here rather than below because the buffer may not be large
|
||||
* enough to hold a large integer.
|
||||
*/
|
||||
if (mode == DTOSTR_FIXED && (d >= 1e21 || d <= -1e21))
|
||||
if (mode == DTOSTR_FIXED && (dinput >= 1e21 || dinput <= -1e21))
|
||||
mode = DTOSTR_STANDARD;
|
||||
|
||||
LOCK_DTOA();
|
||||
dval(d) = dinput;
|
||||
numBegin = dtoa(d, dtoaModes[mode], precision, &decPt, &sign, &numEnd);
|
||||
if (!numBegin) {
|
||||
UNLOCK_DTOA();
|
||||
|
|
@ -352,28 +354,30 @@ static uint32 quorem2(Bigint *b, int32 k)
|
|||
#define BASEDIGIT(digit) ((char)(((digit) >= 10) ? 'a' - 10 + (digit) : '0' + (digit)))
|
||||
|
||||
JS_FRIEND_API(char *)
|
||||
JS_dtobasestr(int base, double d)
|
||||
JS_dtobasestr(int base, double dinput)
|
||||
{
|
||||
U d;
|
||||
char *buffer; /* The output string */
|
||||
char *p; /* Pointer to current position in the buffer */
|
||||
char *pInt; /* Pointer to the beginning of the integer part of the string */
|
||||
char *q;
|
||||
uint32 digit;
|
||||
double di; /* d truncated to an integer */
|
||||
double df; /* The fractional part of d */
|
||||
U di; /* d truncated to an integer */
|
||||
U df; /* The fractional part of d */
|
||||
|
||||
JS_ASSERT(base >= 2 && base <= 36);
|
||||
|
||||
dval(d) = dinput;
|
||||
buffer = (char*) malloc(DTOBASESTR_BUFFER_SIZE);
|
||||
if (buffer) {
|
||||
p = buffer;
|
||||
if (d < 0.0
|
||||
if (dval(d) < 0.0
|
||||
#if defined(XP_WIN) || defined(XP_OS2)
|
||||
&& !((word0(d) & Exp_mask) == Exp_mask && ((word0(d) & Frac_mask) || word1(d))) /* Visual C++ doesn't know how to compare against NaN */
|
||||
#endif
|
||||
) {
|
||||
*p++ = '-';
|
||||
d = -d;
|
||||
dval(d) = -dval(d);
|
||||
}
|
||||
|
||||
/* Check for Infinity and NaN */
|
||||
|
|
@ -385,9 +389,9 @@ JS_dtobasestr(int base, double d)
|
|||
LOCK_DTOA();
|
||||
/* Output the integer part of d with the digits in reverse order. */
|
||||
pInt = p;
|
||||
di = fd_floor(d);
|
||||
if (di <= 4294967295.0) {
|
||||
uint32 n = (uint32)di;
|
||||
dval(di) = fd_floor(dval(d));
|
||||
if (dval(di) <= 4294967295.0) {
|
||||
uint32 n = (uint32)dval(di);
|
||||
if (n)
|
||||
do {
|
||||
uint32 m = n / base;
|
||||
|
|
@ -426,8 +430,8 @@ JS_dtobasestr(int base, double d)
|
|||
*q-- = ch;
|
||||
}
|
||||
|
||||
df = d - di;
|
||||
if (df != 0.0) {
|
||||
dval(df) = dval(d) - dval(di);
|
||||
if (dval(df) != 0.0) {
|
||||
/* We have a fraction. */
|
||||
int e, bbits;
|
||||
int32 s2, done;
|
||||
|
|
|
|||
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Ссылка в новой задаче