aboutsummaryrefslogtreecommitdiff
path: root/system/lib/libc/musl/src/internal
diff options
context:
space:
mode:
Diffstat (limited to 'system/lib/libc/musl/src/internal')
-rw-r--r--system/lib/libc/musl/src/internal/floatscan.c496
-rw-r--r--system/lib/libc/musl/src/internal/floatscan.h8
-rw-r--r--system/lib/libc/musl/src/internal/intscan.c99
-rw-r--r--system/lib/libc/musl/src/internal/intscan.h8
-rw-r--r--system/lib/libc/musl/src/internal/libm.h169
-rw-r--r--system/lib/libc/musl/src/internal/shgetc.c27
-rw-r--r--system/lib/libc/musl/src/internal/shgetc.h9
7 files changed, 816 insertions, 0 deletions
diff --git a/system/lib/libc/musl/src/internal/floatscan.c b/system/lib/libc/musl/src/internal/floatscan.c
new file mode 100644
index 00000000..f6e331d4
--- /dev/null
+++ b/system/lib/libc/musl/src/internal/floatscan.c
@@ -0,0 +1,496 @@
+#include <stdint.h>
+#include <stdio.h>
+#include <math.h>
+#include <float.h>
+#include <limits.h>
+#include <errno.h>
+#include <ctype.h>
+
+#include "shgetc.h"
+#include "floatscan.h"
+
+#if LDBL_MANT_DIG == 53 && LDBL_MAX_EXP == 1024
+
+#define LD_B1B_DIG 2
+#define LD_B1B_MAX 9007199, 254740991
+#define KMAX 128
+
+#else /* LDBL_MANT_DIG == 64 && LDBL_MAX_EXP == 16384 */
+
+#define LD_B1B_DIG 3
+#define LD_B1B_MAX 18, 446744073, 709551615
+#define KMAX 2048
+
+#endif
+
+#define MASK (KMAX-1)
+
+#define CONCAT2(x,y) x ## y
+#define CONCAT(x,y) CONCAT2(x,y)
+
+static long long scanexp(FILE *f, int pok)
+{
+ int c;
+ int x;
+ long long y;
+ int neg = 0;
+
+ c = shgetc(f);
+ if (c=='+' || c=='-') {
+ neg = (c=='-');
+ c = shgetc(f);
+ if (c-'0'>=10U && pok) shunget(f);
+ }
+ if (c-'0'>=10U) {
+ shunget(f);
+ return LLONG_MIN;
+ }
+ for (x=0; c-'0'<10U && x<INT_MAX/10; c = shgetc(f))
+ x = 10*x + c-'0';
+ for (y=x; c-'0'<10U && y<LLONG_MAX/100; c = shgetc(f))
+ y = 10*y + c-'0';
+ for (; c-'0'<10U; c = shgetc(f));
+ shunget(f);
+ return neg ? -y : y;
+}
+
+
+static long double decfloat(FILE *f, int c, int bits, int emin, int sign, int pok)
+{
+ uint32_t x[KMAX];
+ static const uint32_t th[] = { LD_B1B_MAX };
+ int i, j, k, a, z;
+ long long lrp=0, dc=0;
+ long long e10=0;
+ int lnz = 0;
+ int gotdig = 0, gotrad = 0;
+ int rp;
+ int e2;
+ int emax = -emin-bits+3;
+ int denormal = 0;
+ long double y;
+ long double frac=0;
+ long double bias=0;
+ static const int p10s[] = { 10, 100, 1000, 10000,
+ 100000, 1000000, 10000000, 100000000 };
+
+ j=0;
+ k=0;
+
+ /* Don't let leading zeros consume buffer space */
+ for (; c=='0'; c = shgetc(f)) gotdig=1;
+ if (c=='.') {
+ gotrad = 1;
+ for (c = shgetc(f); c=='0'; c = shgetc(f)) gotdig=1, lrp--;
+ }
+
+ x[0] = 0;
+ for (; c-'0'<10U || c=='.'; c = shgetc(f)) {
+ if (c == '.') {
+ if (gotrad) break;
+ gotrad = 1;
+ lrp = dc;
+ } else if (k < KMAX-3) {
+ dc++;
+ if (c!='0') lnz = dc;
+ if (j) x[k] = x[k]*10 + c-'0';
+ else x[k] = c-'0';
+ if (++j==9) {
+ k++;
+ j=0;
+ }
+ gotdig=1;
+ } else {
+ dc++;
+ if (c!='0') x[KMAX-4] |= 1;
+ }
+ }
+ if (!gotrad) lrp=dc;
+
+ if (gotdig && (c|32)=='e') {
+ e10 = scanexp(f, pok);
+ if (e10 == LLONG_MIN) {
+ if (pok) {
+ shunget(f);
+ } else {
+ shlim(f, 0);
+ return 0;
+ }
+ e10 = 0;
+ }
+ lrp += e10;
+ } else if (c>=0) {
+ shunget(f);
+ }
+ if (!gotdig) {
+ errno = EINVAL;
+ shlim(f, 0);
+ return 0;
+ }
+
+ /* Handle zero specially to avoid nasty special cases later */
+ if (!x[0]) return sign * 0.0;
+
+ /* Optimize small integers (w/no exponent) and over/under-flow */
+ if (lrp==dc && dc<10 && (bits>30 || x[0]>>bits==0))
+ return sign * (long double)x[0];
+ if (lrp > -emin/2) {
+ errno = ERANGE;
+ return sign * LDBL_MAX * LDBL_MAX;
+ }
+ if (lrp < emin-2*LDBL_MANT_DIG) {
+ errno = ERANGE;
+ return sign * LDBL_MIN * LDBL_MIN;
+ }
+
+ /* Align incomplete final B1B digit */
+ if (j) {
+ for (; j<9; j++) x[k]*=10;
+ k++;
+ j=0;
+ }
+
+ a = 0;
+ z = k;
+ e2 = 0;
+ rp = lrp;
+
+ /* Optimize small to mid-size integers (even in exp. notation) */
+ if (lnz<9 && lnz<=rp && rp < 18) {
+ if (rp == 9) return sign * (long double)x[0];
+ if (rp < 9) return sign * (long double)x[0] / p10s[8-rp];
+ int bitlim = bits-3*(int)(rp-9);
+ if (bitlim>30 || x[0]>>bitlim==0)
+ return sign * (long double)x[0] * p10s[rp-10];
+ }
+
+ /* Align radix point to B1B digit boundary */
+ if (rp % 9) {
+ int rpm9 = rp>=0 ? rp%9 : rp%9+9;
+ int p10 = p10s[8-rpm9];
+ uint32_t carry = 0;
+ for (k=a; k!=z; k++) {
+ uint32_t tmp = x[k] % p10;
+ x[k] = x[k]/p10 + carry;
+ carry = 1000000000/p10 * tmp;
+ if (k==a && !x[k]) {
+ a = (a+1 & MASK);
+ rp -= 9;
+ }
+ }
+ if (carry) x[z++] = carry;
+ rp += 9-rpm9;
+ }
+
+ /* Upscale until desired number of bits are left of radix point */
+ while (rp < 9*LD_B1B_DIG || (rp == 9*LD_B1B_DIG && x[a]<th[0])) {
+ uint32_t carry = 0;
+ e2 -= 29;
+ for (k=(z-1 & MASK); ; k=(k-1 & MASK)) {
+ uint64_t tmp = ((uint64_t)x[k] << 29) + carry;
+ if (tmp > 1000000000) {
+ carry = tmp / 1000000000;
+ x[k] = tmp % 1000000000;
+ } else {
+ carry = 0;
+ x[k] = tmp;
+ }
+ if (k==(z-1 & MASK) && k!=a && !x[k]) z = k;
+ if (k==a) break;
+ }
+ if (carry) {
+ rp += 9;
+ a = (a-1 & MASK);
+ if (a == z) {
+ z = (z-1 & MASK);
+ x[z-1 & MASK] |= x[z];
+ }
+ x[a] = carry;
+ }
+ }
+
+ /* Downscale until exactly number of bits are left of radix point */
+ for (;;) {
+ uint32_t carry = 0;
+ int sh = 1;
+ for (i=0; i<LD_B1B_DIG; i++) {
+ k = (a+i & MASK);
+ if (k == z || x[k] < th[i]) {
+ i=LD_B1B_DIG;
+ break;
+ }
+ if (x[a+i & MASK] > th[i]) break;
+ }
+ if (i==LD_B1B_DIG && rp==9*LD_B1B_DIG) break;
+ /* FIXME: find a way to compute optimal sh */
+ if (rp > 9+9*LD_B1B_DIG) sh = 9;
+ e2 += sh;
+ for (k=a; k!=z; k=(k+1 & MASK)) {
+ uint32_t tmp = x[k] & (1<<sh)-1;
+ x[k] = (x[k]>>sh) + carry;
+ carry = (1000000000>>sh) * tmp;
+ if (k==a && !x[k]) {
+ a = (a+1 & MASK);
+ i--;
+ rp -= 9;
+ }
+ }
+ if (carry) {
+ if ((z+1 & MASK) != a) {
+ x[z] = carry;
+ z = (z+1 & MASK);
+ } else x[z-1 & MASK] |= 1;
+ }
+ }
+
+ /* Assemble desired bits into floating point variable */
+ for (y=i=0; i<LD_B1B_DIG; i++) {
+ if ((a+i & MASK)==z) x[(z=(z+1 & MASK))-1] = 0;
+ y = 1000000000.0L * y + x[a+i & MASK];
+ }
+
+ y *= sign;
+
+ /* Limit precision for denormal results */
+ if (bits > LDBL_MANT_DIG+e2-emin) {
+ bits = LDBL_MANT_DIG+e2-emin;
+ if (bits<0) bits=0;
+ denormal = 1;
+ }
+
+ /* Calculate bias term to force rounding, move out lower bits */
+ if (bits < LDBL_MANT_DIG) {
+ bias = copysignl(scalbn(1, 2*LDBL_MANT_DIG-bits-1), y);
+ frac = fmodl(y, scalbn(1, LDBL_MANT_DIG-bits));
+ y -= frac;
+ y += bias;
+ }
+
+ /* Process tail of decimal input so it can affect rounding */
+ if ((a+i & MASK) != z) {
+ uint32_t t = x[a+i & MASK];
+ if (t < 500000000 && (t || (a+i+1 & MASK) != z))
+ frac += 0.25*sign;
+ else if (t > 500000000)
+ frac += 0.75*sign;
+ else if (t == 500000000) {
+ if ((a+i+1 & MASK) == z)
+ frac += 0.5*sign;
+ else
+ frac += 0.75*sign;
+ }
+ if (LDBL_MANT_DIG-bits >= 2 && !fmodl(frac, 1))
+ frac++;
+ }
+
+ y += frac;
+ y -= bias;
+
+ if ((e2+LDBL_MANT_DIG & INT_MAX) > emax-5) {
+ if (fabs(y) >= CONCAT(0x1p, LDBL_MANT_DIG)) {
+ if (denormal && bits==LDBL_MANT_DIG+e2-emin)
+ denormal = 0;
+ y *= 0.5;
+ e2++;
+ }
+ if (e2+LDBL_MANT_DIG>emax || (denormal && frac))
+ errno = ERANGE;
+ }
+
+ return scalbnl(y, e2);
+}
+
+static long double hexfloat(FILE *f, int bits, int emin, int sign, int pok)
+{
+ uint32_t x = 0;
+ long double y = 0;
+ long double scale = 1;
+ long double bias = 0;
+ int gottail = 0, gotrad = 0, gotdig = 0;
+ long long rp = 0;
+ long long dc = 0;
+ long long e2 = 0;
+ int d;
+ int c;
+
+ c = shgetc(f);
+
+ /* Skip leading zeros */
+ for (; c=='0'; c = shgetc(f)) gotdig = 1;
+
+ if (c=='.') {
+ gotrad = 1;
+ c = shgetc(f);
+ /* Count zeros after the radix point before significand */
+ for (rp=0; c=='0'; c = shgetc(f), rp--) gotdig = 1;
+ }
+
+ for (; c-'0'<10U || (c|32)-'a'<6U || c=='.'; c = shgetc(f)) {
+ if (c=='.') {
+ if (gotrad) break;
+ rp = dc;
+ gotrad = 1;
+ } else {
+ gotdig = 1;
+ if (c > '9') d = (c|32)+10-'a';
+ else d = c-'0';
+ if (dc<8) {
+ x = x*16 + d;
+ } else if (dc < LDBL_MANT_DIG/4+1) {
+ y += d*(scale/=16);
+ } else if (d && !gottail) {
+ y += 0.5*scale;
+ gottail = 1;
+ }
+ dc++;
+ }
+ }
+ if (!gotdig) {
+ shunget(f);
+ if (pok) {
+ shunget(f);
+ if (gotrad) shunget(f);
+ } else {
+ shlim(f, 0);
+ }
+ return sign * 0.0;
+ }
+ if (!gotrad) rp = dc;
+ while (dc<8) x *= 16, dc++;
+ if ((c|32)=='p') {
+ e2 = scanexp(f, pok);
+ if (e2 == LLONG_MIN) {
+ if (pok) {
+ shunget(f);
+ } else {
+ shlim(f, 0);
+ return 0;
+ }
+ e2 = 0;
+ }
+ } else {
+ shunget(f);
+ }
+ e2 += 4*rp - 32;
+
+ if (!x) return sign * 0.0;
+ if (e2 > -emin) {
+ errno = ERANGE;
+ return sign * LDBL_MAX * LDBL_MAX;
+ }
+ if (e2 < emin-2*LDBL_MANT_DIG) {
+ errno = ERANGE;
+ return sign * LDBL_MIN * LDBL_MIN;
+ }
+
+ while (x < 0x80000000) {
+ if (y>=0.5) {
+ x += x + 1;
+ y += y - 1;
+ } else {
+ x += x;
+ y += y;
+ }
+ e2--;
+ }
+
+ if (bits > 32+e2-emin) {
+ bits = 32+e2-emin;
+ if (bits<0) bits=0;
+ }
+
+ if (bits < LDBL_MANT_DIG)
+ bias = copysignl(scalbn(1, 32+LDBL_MANT_DIG-bits-1), sign);
+
+ if (bits<32 && y && !(x&1)) x++, y=0;
+
+ y = bias + sign*(long double)x + sign*y;
+ y -= bias;
+
+ if (!y) errno = ERANGE;
+
+ return scalbnl(y, e2);
+}
+
+long double __floatscan(FILE *f, int prec, int pok)
+{
+ int sign = 1;
+ size_t i;
+ int bits;
+ int emin;
+ int c;
+
+ switch (prec) {
+ case 0:
+ bits = FLT_MANT_DIG;
+ emin = FLT_MIN_EXP-bits;
+ break;
+ case 1:
+ bits = DBL_MANT_DIG;
+ emin = DBL_MIN_EXP-bits;
+ break;
+ case 2:
+ bits = LDBL_MANT_DIG;
+ emin = LDBL_MIN_EXP-bits;
+ break;
+ default:
+ return 0;
+ }
+
+ while (isspace((c=shgetc(f))));
+
+ if (c=='+' || c=='-') {
+ sign -= 2*(c=='-');
+ c = shgetc(f);
+ }
+
+ for (i=0; i<8 && (c|32)=="infinity"[i]; i++)
+ if (i<7) c = shgetc(f);
+ if (i==3 || i==8 || (i>3 && pok)) {
+ if (i!=8) {
+ shunget(f);
+ if (pok) for (; i>3; i--) shunget(f);
+ }
+ return sign * INFINITY;
+ }
+ if (!i) for (i=0; i<3 && (c|32)=="nan"[i]; i++)
+ if (i<2) c = shgetc(f);
+ if (i==3) {
+ if (shgetc(f) != '(') {
+ shunget(f);
+ return NAN;
+ }
+ for (i=1; ; i++) {
+ c = shgetc(f);
+ if (c-'0'<10U || c-'A'<26U || c-'a'<26U || c=='_')
+ continue;
+ if (c==')') return NAN;
+ shunget(f);
+ if (!pok) {
+ errno = EINVAL;
+ shlim(f, 0);
+ return 0;
+ }
+ while (i--) shunget(f);
+ return NAN;
+ }
+ return NAN;
+ }
+
+ if (i) {
+ shunget(f);
+ errno = EINVAL;
+ shlim(f, 0);
+ return 0;
+ }
+
+ if (c=='0') {
+ c = shgetc(f);
+ if ((c|32) == 'x')
+ return hexfloat(f, bits, emin, sign, pok);
+ shunget(f);
+ c = '0';
+ }
+
+ return decfloat(f, c, bits, emin, sign, pok);
+}
diff --git a/system/lib/libc/musl/src/internal/floatscan.h b/system/lib/libc/musl/src/internal/floatscan.h
new file mode 100644
index 00000000..e027fa08
--- /dev/null
+++ b/system/lib/libc/musl/src/internal/floatscan.h
@@ -0,0 +1,8 @@
+#ifndef FLOATSCAN_H
+#define FLOATSCAN_H
+
+#include <stdio.h>
+
+long double __floatscan(FILE *, int, int);
+
+#endif
diff --git a/system/lib/libc/musl/src/internal/intscan.c b/system/lib/libc/musl/src/internal/intscan.c
new file mode 100644
index 00000000..69350efa
--- /dev/null
+++ b/system/lib/libc/musl/src/internal/intscan.c
@@ -0,0 +1,99 @@
+#include <limits.h>
+#include <errno.h>
+#include <ctype.h>
+#include "shgetc.h"
+
+/* Lookup table for digit values. -1==255>=36 -> invalid */
+static const unsigned char table[] = { -1,
+-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,
+-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,
+-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,
+ 0, 1, 2, 3, 4, 5, 6, 7, 8, 9,-1,-1,-1,-1,-1,-1,
+-1,10,11,12,13,14,15,16,17,18,19,20,21,22,23,24,
+25,26,27,28,29,30,31,32,33,34,35,-1,-1,-1,-1,-1,
+-1,10,11,12,13,14,15,16,17,18,19,20,21,22,23,24,
+25,26,27,28,29,30,31,32,33,34,35,-1,-1,-1,-1,-1,
+-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,
+-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,
+-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,
+-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,
+-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,
+-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,
+-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,
+-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,
+};
+
+unsigned long long __intscan(FILE *f, unsigned base, int pok, unsigned long long lim)
+{
+ const unsigned char *val = table+1;
+ int c, neg=0;
+ unsigned x;
+ unsigned long long y;
+ if (base > 36) {
+ errno = EINVAL;
+ return 0;
+ }
+ while (isspace((c=shgetc(f))));
+ if (c=='+' || c=='-') {
+ neg = -(c=='-');
+ c = shgetc(f);
+ }
+ if ((base == 0 || base == 16) && c=='0') {
+ c = shgetc(f);
+ if ((c|32)=='x') {
+ c = shgetc(f);
+ if (val[c]>=16) {
+ shunget(f);
+ if (pok) shunget(f);
+ else shlim(f, 0);
+ return 0;
+ }
+ base = 16;
+ } else if (base == 0) {
+ base = 8;
+ }
+ } else {
+ if (base == 0) base = 10;
+ if (val[c] >= base) {
+ shunget(f);
+ shlim(f, 0);
+ errno = EINVAL;
+ return 0;
+ }
+ }
+ if (base == 10) {
+ for (x=0; c-'0'<10U && x<=UINT_MAX/10-1; c=shgetc(f))
+ x = x*10 + (c-'0');
+ for (y=x; c-'0'<10U && y<=ULLONG_MAX/10 && 10*y<=ULLONG_MAX-(c-'0'); c=shgetc(f))
+ y = y*10 + (c-'0');
+ if (c-'0'>=10U) goto done;
+ } else if (!(base & base-1)) {
+ int bs = "\0\1\2\4\7\3\6\5"[(0x17*base)>>5&7];
+ for (x=0; val[c]<base && x<=UINT_MAX/32; c=shgetc(f))
+ x = x<<bs | val[c];
+ for (y=x; val[c]<base && y<=ULLONG_MAX>>bs; c=shgetc(f))
+ y = y<<bs | val[c];
+ } else {
+ for (x=0; val[c]<base && x<=UINT_MAX/36-1; c=shgetc(f))
+ x = x*base + val[c];
+ for (y=x; val[c]<base && y<=ULLONG_MAX/base && base*y<=ULLONG_MAX-val[c]; c=shgetc(f))
+ y = y*base + val[c];
+ }
+ if (val[c]<base) {
+ for (; val[c]<base; c=shgetc(f));
+ errno = ERANGE;
+ y = lim;
+ }
+done:
+ shunget(f);
+ if (y>=lim) {
+ if (!(lim&1) && !neg) {
+ errno = ERANGE;
+ return lim-1;
+ } else if (y>lim) {
+ errno = ERANGE;
+ return lim;
+ }
+ }
+ return (y^neg)-neg;
+}
diff --git a/system/lib/libc/musl/src/internal/intscan.h b/system/lib/libc/musl/src/internal/intscan.h
new file mode 100644
index 00000000..994c5e7d
--- /dev/null
+++ b/system/lib/libc/musl/src/internal/intscan.h
@@ -0,0 +1,8 @@
+#ifndef INTSCAN_H
+#define INTSCAN_H
+
+#include <stdio.h>
+
+unsigned long long __intscan(FILE *, unsigned, int, unsigned long long);
+
+#endif
diff --git a/system/lib/libc/musl/src/internal/libm.h b/system/lib/libc/musl/src/internal/libm.h
new file mode 100644
index 00000000..9f0d3bc8
--- /dev/null
+++ b/system/lib/libc/musl/src/internal/libm.h
@@ -0,0 +1,169 @@
+/* origin: FreeBSD /usr/src/lib/msun/src/math_private.h */
+/*
+ * ====================================================
+ * Copyright (C) 1993 by Sun Microsystems, Inc. All rights reserved.
+ *
+ * Developed at SunPro, a Sun Microsystems, Inc. business.
+ * Permission to use, copy, modify, and distribute this
+ * software is freely granted, provided that this notice
+ * is preserved.
+ * ====================================================
+ */
+
+#ifndef _LIBM_H
+#define _LIBM_H
+
+#include <stdint.h>
+#include <float.h>
+#include <math.h>
+#include <complex.h>
+#include <endian.h>
+
+#if LDBL_MANT_DIG == 53 && LDBL_MAX_EXP == 1024
+#elif LDBL_MANT_DIG == 64 && LDBL_MAX_EXP == 16384 && __BYTE_ORDER == __LITTLE_ENDIAN
+union ldshape {
+ long double f;
+ struct {
+ uint64_t m;
+ uint16_t se;
+ } i;
+};
+#elif LDBL_MANT_DIG == 113 && LDBL_MAX_EXP == 16384 && __BYTE_ORDER == __LITTLE_ENDIAN
+union ldshape {
+ long double f;
+ struct {
+ uint64_t lo;
+ uint32_t mid;
+ uint16_t top;
+ uint16_t se;
+ } i;
+ struct {
+ uint64_t lo;
+ uint64_t hi;
+ } i2;
+};
+#else
+#error Unsupported long double representation
+#endif
+
+#define FORCE_EVAL(x) do { \
+ if (sizeof(x) == sizeof(float)) { \
+ volatile float __x; \
+ __x = (x); \
+ } else if (sizeof(x) == sizeof(double)) { \
+ volatile double __x; \
+ __x = (x); \
+ } else { \
+ volatile long double __x; \
+ __x = (x); \
+ } \
+} while(0)
+
+/* Get two 32 bit ints from a double. */
+#define EXTRACT_WORDS(hi,lo,d) \
+do { \
+ union {double f; uint64_t i;} __u; \
+ __u.f = (d); \
+ (hi) = __u.i >> 32; \
+ (lo) = (uint32_t)__u.i; \
+} while (0)
+
+/* Get the more significant 32 bit int from a double. */
+#define GET_HIGH_WORD(hi,d) \
+do { \
+ union {double f; uint64_t i;} __u; \
+ __u.f = (d); \
+ (hi) = __u.i >> 32; \
+} while (0)
+
+/* Get the less significant 32 bit int from a double. */
+#define GET_LOW_WORD(lo,d) \
+do { \
+ union {double f; uint64_t i;} __u; \
+ __u.f = (d); \
+ (lo) = (uint32_t)__u.i; \
+} while (0)
+
+/* Set a double from two 32 bit ints. */
+#define INSERT_WORDS(d,hi,lo) \
+do { \
+ union {double f; uint64_t i;} __u; \
+ __u.i = ((uint64_t)(hi)<<32) | (uint32_t)(lo); \
+ (d) = __u.f; \
+} while (0)
+
+/* Set the more significant 32 bits of a double from an int. */
+#define SET_HIGH_WORD(d,hi) \
+do { \
+ union {double f; uint64_t i;} __u; \
+ __u.f = (d); \
+ __u.i &= 0xffffffff; \
+ __u.i |= (uint64_t)(hi) << 32; \
+ (d) = __u.f; \
+} while (0)
+
+/* Set the less significant 32 bits of a double from an int. */
+#define SET_LOW_WORD(d,lo) \
+do { \
+ union {double f; uint64_t i;} __u; \
+ __u.f = (d); \
+ __u.i &= 0xffffffff00000000ull; \
+ __u.i |= (uint32_t)(lo); \
+ (d) = __u.f; \
+} while (0)
+
+/* Get a 32 bit int from a float. */
+#define GET_FLOAT_WORD(w,d) \
+do { \
+ union {float f; uint32_t i;} __u; \
+ __u.f = (d); \
+ (w) = __u.i; \
+} while (0)
+
+/* Set a float from a 32 bit int. */
+#define SET_FLOAT_WORD(d,w) \
+do { \
+ union {float f; uint32_t i;} __u; \
+ __u.i = (w); \
+ (d) = __u.f; \
+} while (0)
+
+/* fdlibm kernel functions */
+
+int __rem_pio2_large(double*,double*,int,int,int);
+
+int __rem_pio2(double,double*);
+double __sin(double,double,int);
+double __cos(double,double);
+double __tan(double,double,int);
+double __expo2(double);
+double complex __ldexp_cexp(double complex,int);
+
+int __rem_pio2f(float,double*);
+float __sindf(double);
+float __cosdf(double);
+float __tandf(double,int);
+float __expo2f(float);
+float complex __ldexp_cexpf(float complex,int);
+
+int __rem_pio2l(long double, long double *);
+long double __sinl(long double, long double, int);
+long double __cosl(long double, long double);
+long double __tanl(long double, long double, int);
+
+/* polynomial evaluation */
+long double __polevll(long double, const long double *, int);
+long double __p1evll(long double, const long double *, int);
+
+#if 0
+/* Attempt to get strict C99 semantics for assignment with non-C99 compilers. */
+#define STRICT_ASSIGN(type, lval, rval) do { \
+ volatile type __v = (rval); \
+ (lval) = __v; \
+} while (0)
+#else
+/* Should work with -fexcess-precision=standard (>=gcc-4.5) or -ffloat-store */
+#define STRICT_ASSIGN(type, lval, rval) ((lval) = (type)(rval))
+#endif
+
+#endif
diff --git a/system/lib/libc/musl/src/internal/shgetc.c b/system/lib/libc/musl/src/internal/shgetc.c
new file mode 100644
index 00000000..e878b00a
--- /dev/null
+++ b/system/lib/libc/musl/src/internal/shgetc.c
@@ -0,0 +1,27 @@
+#include "shgetc.h"
+
+void __shlim(FILE *f, off_t lim)
+{
+ f->shlim = lim;
+ f->shcnt = f->rend - f->rpos;
+ if (lim && f->shcnt > lim)
+ f->shend = f->rpos + lim;
+ else
+ f->shend = f->rend;
+}
+
+int __shgetc(FILE *f)
+{
+ int c;
+ if (f->shlim && f->shcnt >= f->shlim || (c=__uflow(f)) < 0) {
+ f->shend = 0;
+ return EOF;
+ }
+ if (f->shlim && f->rend - f->rpos > f->shlim - f->shcnt - 1)
+ f->shend = f->rpos + (f->shlim - f->shcnt - 1);
+ else
+ f->shend = f->rend;
+ if (f->rend) f->shcnt += f->rend - f->rpos + 1;
+ if (f->rpos[-1] != c) f->rpos[-1] = c;
+ return c;
+}
diff --git a/system/lib/libc/musl/src/internal/shgetc.h b/system/lib/libc/musl/src/internal/shgetc.h
new file mode 100644
index 00000000..7beb8ce6
--- /dev/null
+++ b/system/lib/libc/musl/src/internal/shgetc.h
@@ -0,0 +1,9 @@
+#include "stdio_impl.h"
+
+void __shlim(FILE *, off_t);
+int __shgetc(FILE *);
+
+#define shcnt(f) ((f)->shcnt + ((f)->rpos - (f)->rend))
+#define shlim(f, lim) __shlim((f), (lim))
+#define shgetc(f) (((f)->rpos < (f)->shend) ? *(f)->rpos++ : __shgetc(f))
+#define shunget(f) ((f)->shend ? (void)(f)->rpos-- : (void)0)
generated by cgit v1.2.3-18-g5258 (git 2.32.0) at 2024-11-21 19:57:10 +0000