/*
- * Copyright (C) 2000-2005 Manuel Novoa III
+ * Copyright (C) 2000-2006 Manuel Novoa III <mjn3@uclibc.org>
*
* Licensed under the LGPL v2.1, see the file COPYING.LIB in this tarball.
*/
-/* Notes:
- *
- * The primary objective of this implementation was minimal size and
- * portablility, while providing robustness and resonable accuracy.
- *
- * This implementation depends on IEEE floating point behavior and expects
- * to be able to generate +/- infinity as a result.
- *
- * There are a number of compile-time options below.
- */
-
-/* July 27, 2003
- *
- * General cleanup and some minor size optimizations.
- * Change implementation to support __strtofpmax() rather than strtod().
- * Now all the strto{floating pt}() funcs are implemented in terms of
- * of the internal __strtofpmax() function.
- * Support "nan", "inf", and "infinity" strings (case-insensitive).
- * Support hexadecimal floating point notation.
- * Support wchar variants.
- * Support xlocale variants.
- *
- * TODO:
- *
- * Consider accumulating blocks of digits in longs to save floating pt mults.
- * This would likely be much better on anything that only supported floats
- * where DECIMAL_DIG == 9. Actually, if floats have FLT_MAX_10_EXP == 38,
- * we could calculate almost all the exponent multipliers (p_base) in
- * long arithmetic as well.
- */
-
-/**********************************************************************/
-/* OPTIONS */
-/**********************************************************************/
-
-/* Defined if we want to recognize "nan", "inf", and "infinity". (C99) */
-#define _STRTOD_NAN_INF_STRINGS 1
-
-/* Defined if we want support hexadecimal floating point notation. (C99) */
-/* Note! Now controlled by uClibc configuration. See below. */
-#define _STRTOD_HEXADECIMAL_FLOATS 1
-
-/* Defined if we want to scale with a O(log2(exp)) multiplications.
- * This is generally a good thing to do unless you are really tight
- * on space and do not expect to convert values of large magnitude. */
-
-#define _STRTOD_LOG_SCALING 1
-
-/* WARNING!!! WARNING!!! WARNING!!! WARNING!!! WARNING!!!
- *
- * Clearing any of the options below this point is not advised (or tested).
- *
- * WARNING!!! WARNING!!! WARNING!!! WARNING!!! WARNING!!! */
-
-/* Defined if we want strtod to set errno appropriately. */
-/* NOTE: Implies all options below. */
-#define _STRTOD_ERRNO 1
-
-/* Defined if we want support for the endptr arg. */
-/* Implied by _STRTOD_ERRNO. */
-#define _STRTOD_ENDPTR 1
-
-/* Defined if we want to prevent overflow in accumulating the exponent. */
-/* Implied by _STRTOD_ERRNO. */
-#define _STRTOD_RESTRICT_EXP 1
-
-/* Defined if we want to process mantissa digits more intelligently. */
-/* Implied by _STRTOD_ERRNO. */
-#define _STRTOD_RESTRICT_DIGITS 1
-
-/* Defined if we want to skip scaling 0 for the exponent. */
-/* Implied by _STRTOD_ERRNO. */
-#define _STRTOD_ZERO_CHECK 1
-
-/**********************************************************************/
-/* Don't change anything that follows. */
-/**********************************************************************/
-
-#ifdef _STRTOD_ERRNO
-#undef _STRTOD_ENDPTR
-#undef _STRTOD_RESTRICT_EXP
-#undef _STRTOD_RESTRICT_DIGITS
-#undef _STRTOD_ZERO_CHECK
-#define _STRTOD_ENDPTR 1
-#define _STRTOD_RESTRICT_EXP 1
-#define _STRTOD_RESTRICT_DIGITS 1
-#define _STRTOD_ZERO_CHECK 1
-#endif
-
-/**********************************************************************/
-
-#define _ISOC99_SOURCE 1
-#include <stdlib.h>
-#include <string.h>
-#include <ctype.h>
-#include <errno.h>
-#include <limits.h>
-#include <float.h>
-#include <bits/uClibc_fpmax.h>
-
-#include <locale.h>
-
-#ifdef __UCLIBC_HAS_WCHAR__
-
-#include <wchar.h>
-#include <wctype.h>
-#include <bits/uClibc_uwchar.h>
-libc_hidden_proto(iswspace)
-#endif
-
-#ifdef __UCLIBC_HAS_XLOCALE__
-#include <xlocale.h>
-libc_hidden_proto(iswspace_l)
-#endif /* __UCLIBC_HAS_XLOCALE__ */
-
-/* Handle _STRTOD_HEXADECIMAL_FLOATS via uClibc config now. */
-#undef _STRTOD_HEXADECIMAL_FLOATS
-#ifdef __UCLIBC_HAS_HEXADECIMAL_FLOATS__
-#define _STRTOD_HEXADECIMAL_FLOATS 1
-#endif /* __UCLIBC_HAS_HEXADECIMAL_FLOATS__ */
-
-/**********************************************************************/
-
-#undef _STRTOD_FPMAX
-
-#if FPMAX_TYPE == 3
-
-#define NEED_STRTOLD_WRAPPER
-#define NEED_STRTOD_WRAPPER
-#define NEED_STRTOF_WRAPPER
-
-#elif FPMAX_TYPE == 2
-
-#define NEED_STRTOD_WRAPPER
-#define NEED_STRTOF_WRAPPER
-
-#elif FPMAX_TYPE == 1
-
-#define NEED_STRTOF_WRAPPER
-
-#else
-
-#error unknown FPMAX_TYPE!
-
-#endif
-
-extern void __fp_range_check(__fpmax_t y, __fpmax_t x) attribute_hidden;
-
-/**********************************************************************/
-
-#ifdef _STRTOD_RESTRICT_DIGITS
-#define EXP_DENORM_ADJUST DECIMAL_DIG
-#define MAX_ALLOWED_EXP (DECIMAL_DIG + EXP_DENORM_ADJUST - FPMAX_MIN_10_EXP)
-
-#if MAX_ALLOWED_EXP > INT_MAX
-#error size assumption violated for MAX_ALLOWED_EXP
-#endif
-#else
-/* We want some excess if we're not restricting mantissa digits. */
-#define MAX_ALLOWED_EXP ((20 - FPMAX_MIN_10_EXP) * 2)
-#endif
-
-
-#if defined(_STRTOD_RESTRICT_DIGITS) || defined(_STRTOD_ENDPTR) || defined(_STRTOD_HEXADECIMAL_FLOATS)
-#undef _STRTOD_NEED_NUM_DIGITS
-#define _STRTOD_NEED_NUM_DIGITS 1
-#endif
-
-/**********************************************************************/
-#if defined(L___strtofpmax) || defined(L___strtofpmax_l) || defined(L___wcstofpmax) || defined(L___wcstofpmax_l)
-
-#ifdef __UCLIBC_HAS_XLOCALE__
-libc_hidden_proto(__ctype_b_loc)
-#else
-#ifdef __UCLIBC_HAS_LOCALE__
-libc_hidden_proto(__global_locale)
-#endif
-libc_hidden_proto(__ctype_b)
-libc_hidden_proto(__ctype_tolower)
-#endif
-
-#if defined(L___wcstofpmax) || defined(L___wcstofpmax_l)
-
-#define __strtofpmax __wcstofpmax
-#define __strtofpmax_l __wcstofpmax_l
-
-#define Wchar wchar_t
-#ifdef __UCLIBC_DO_XLOCALE
-#define ISSPACE(C) iswspace_l((C), locale_arg)
-#else
-#define ISSPACE(C) iswspace((C))
-#endif
-
-#else /* defined(L___wcstofpmax) || defined(L___wcstofpmax_l) */
-
-#define Wchar char
-#ifdef __UCLIBC_DO_XLOCALE
-#define ISSPACE(C) isspace_l((C), locale_arg)
-#else
-#define ISSPACE(C) isspace((C))
-#endif
-
-#endif /* defined(L___wcstofpmax) || defined(L___wcstofpmax_l) */
-
-
-#if defined(__UCLIBC_HAS_XLOCALE__) && !defined(__UCLIBC_DO_XLOCALE)
-
-__fpmax_t attribute_hidden __strtofpmax(const Wchar *str, Wchar **endptr, int exponent_power)
-{
- return __strtofpmax_l(str, endptr, exponent_power, __UCLIBC_CURLOCALE);
-}
-
-#else /* defined(__UCLIBC_HAS_XLOCALE__) && !defined(__UCLIBC_DO_XLOCALE) */
-
-libc_hidden_proto(memcmp)
-
-__fpmax_t attribute_hidden __XL_NPP(__strtofpmax)(const Wchar *str, Wchar **endptr, int exponent_power
- __LOCALE_PARAM )
-{
- __fpmax_t number;
- __fpmax_t p_base = 10; /* Adjusted to 16 in the hex case. */
- Wchar *pos0;
-#ifdef _STRTOD_ENDPTR
- Wchar *pos1;
-#endif
- Wchar *pos = (Wchar *) str;
- int exponent_temp;
- int negative; /* A flag for the number, a multiplier for the exponent. */
-#ifdef _STRTOD_NEED_NUM_DIGITS
- int num_digits;
-#endif
-#ifdef __UCLIBC_HAS_LOCALE__
-#if defined(L___wcstofpmax) || defined(L___wcstofpmax_l)
- wchar_t decpt_wc = __LOCALE_PTR->decimal_point;
-#else
- const char *decpt = __LOCALE_PTR->decimal_point;
- int decpt_len = __LOCALE_PTR->decimal_point_len;
-#endif
-#endif
-
-#ifdef _STRTOD_HEXADECIMAL_FLOATS
- Wchar expchar = 'e';
- Wchar *poshex = NULL;
- __uint16_t is_mask = _ISdigit;
-#define EXPCHAR expchar
-#define IS_X_DIGIT(C) __isctype((C), is_mask)
-#else /* _STRTOD_HEXADECIMAL_FLOATS */
-#define EXPCHAR 'e'
-#define IS_X_DIGIT(C) isdigit((C))
-#endif /* _STRTOD_HEXADECIMAL_FLOATS */
-
- while (ISSPACE(*pos)) { /* Skip leading whitespace. */
- ++pos;
- }
-
- negative = 0;
- switch(*pos) { /* Handle optional sign. */
- case '-': negative = 1; /* Fall through to increment position. */
- case '+': ++pos;
- }
-
-#ifdef _STRTOD_HEXADECIMAL_FLOATS
- if ((*pos == '0') && (((pos[1])|0x20) == 'x')) {
- poshex = ++pos; /* Save position of 'x' in case no digits */
- ++pos; /* and advance past it. */
- is_mask = _ISxdigit; /* Used by IS_X_DIGIT. */
- expchar = 'p'; /* Adjust exponent char. */
- p_base = 16; /* Adjust base multiplier. */
- }
-#endif
-
- number = 0.;
-#ifdef _STRTOD_NEED_NUM_DIGITS
- num_digits = -1;
-#endif
-/* exponent_power = 0; */
- pos0 = NULL;
-
- LOOP:
- while (IS_X_DIGIT(*pos)) { /* Process string of (hex) digits. */
-#ifdef _STRTOD_RESTRICT_DIGITS
- if (num_digits < 0) { /* First time through? */
- ++num_digits; /* We've now seen a digit. */
- }
- if (num_digits || (*pos != '0')) { /* Had/have nonzero. */
- ++num_digits;
- if (num_digits <= DECIMAL_DIG) { /* Is digit significant? */
-#ifdef _STRTOD_HEXADECIMAL_FLOATS
- number = number * p_base
- + (isdigit(*pos)
- ? (*pos - '0')
- : (((*pos)|0x20) - ('a' - 10)));
-#else /* _STRTOD_HEXADECIMAL_FLOATS */
- number = number * p_base + (*pos - '0');
-#endif /* _STRTOD_HEXADECIMAL_FLOATS */
- }
- }
-#else /* _STRTOD_RESTRICT_DIGITS */
-#ifdef _STRTOD_NEED_NUM_DIGITS
- ++num_digits;
-#endif
-#ifdef _STRTOD_HEXADECIMAL_FLOATS
- number = number * p_base
- + (isdigit(*pos)
- ? (*pos - '0')
- : (((*pos)|0x20) - ('a' - 10)));
-#else /* _STRTOD_HEXADECIMAL_FLOATS */
- number = number * p_base + (*pos - '0');
-#endif /* _STRTOD_HEXADECIMAL_FLOATS */
-#endif /* _STRTOD_RESTRICT_DIGITS */
- ++pos;
- }
-
-#ifdef __UCLIBC_HAS_LOCALE__
-#if defined(L___wcstofpmax) || defined(L___wcstofpmax_l)
- if (!pos0 && (*pos == decpt_wc)) { /* First decimal point? */
- pos0 = ++pos;
- goto LOOP;
- }
-#else
- if (!pos0 && !memcmp(pos, decpt, decpt_len)) { /* First decimal point? */
- pos0 = (pos += decpt_len);
- goto LOOP;
- }
-#endif
-#else /* __UCLIBC_HAS_LOCALE__ */
- if ((*pos == '.') && !pos0) { /* First decimal point? */
- pos0 = ++pos; /* Save position of decimal point */
- goto LOOP; /* and process rest of digits. */
- }
-#endif /* __UCLIBC_HAS_LOCALE__ */
-
-#ifdef _STRTOD_NEED_NUM_DIGITS
- if (num_digits<0) { /* Must have at least one digit. */
-#ifdef _STRTOD_HEXADECIMAL_FLOATS
- if (poshex) { /* Back up to '0' in '0x' prefix. */
- pos = poshex;
- goto DONE;
- }
-#endif /* _STRTOD_HEXADECIMAL_FLOATS */
-
-#ifdef _STRTOD_NAN_INF_STRINGS
- if (!pos0) { /* No decimal point, so check for inf/nan. */
- /* Note: nan is the first string so 'number = i/0.;' works. */
- static const char nan_inf_str[] = "\05nan\0\012infinity\0\05inf\0";
- int i = 0;
-
-#ifdef __UCLIBC_HAS_LOCALE__
- /* Avoid tolower problems for INFINITY in the tr_TR locale. (yuk)*/
-#undef _tolower
-#define _tolower(C) ((C)|0x20)
-#endif /* __UCLIBC_HAS_LOCALE__ */
-
- do {
- /* Unfortunately, we have no memcasecmp(). */
- int j = 0;
- while (_tolower(pos[j]) == nan_inf_str[i+1+j]) {
- ++j;
- if (!nan_inf_str[i+1+j]) {
- number = i / 0.;
- if (negative) { /* Correct for sign. */
- number = -number;
- }
- pos += nan_inf_str[i] - 2;
- goto DONE;
- }
- }
- i += nan_inf_str[i];
- } while (nan_inf_str[i]);
- }
-
-#endif /* STRTOD_NAN_INF_STRINGS */
-#ifdef _STRTOD_ENDPTR
- pos = (Wchar *) str;
-#endif
- goto DONE;
- }
-#endif /* _STRTOD_NEED_NUM_DIGITS */
-
-#ifdef _STRTOD_RESTRICT_DIGITS
- if (num_digits > DECIMAL_DIG) { /* Adjust exponent for skipped digits. */
- exponent_power += num_digits - DECIMAL_DIG;
- }
-#endif
-
- if (pos0) {
- exponent_power += pos0 - pos; /* Adjust exponent for decimal point. */
- }
-
-#ifdef _STRTOD_HEXADECIMAL_FLOATS
- if (poshex) {
- exponent_power *= 4; /* Above is 2**4, but below is 2. */
- p_base = 2;
- }
-#endif /* _STRTOD_HEXADECIMAL_FLOATS */
-
- if (negative) { /* Correct for sign. */
- number = -number;
- }
-
- /* process an exponent string */
- if (((*pos)|0x20) == EXPCHAR) {
-#ifdef _STRTOD_ENDPTR
- pos1 = pos;
-#endif
- negative = 1;
- switch(*++pos) { /* Handle optional sign. */
- case '-': negative = -1; /* Fall through to increment pos. */
- case '+': ++pos;
- }
-
- pos0 = pos;
- exponent_temp = 0;
- while (isdigit(*pos)) { /* Process string of digits. */
-#ifdef _STRTOD_RESTRICT_EXP
- if (exponent_temp < MAX_ALLOWED_EXP) { /* Avoid overflow. */
- exponent_temp = exponent_temp * 10 + (*pos - '0');
- }
-#else
- exponent_temp = exponent_temp * 10 + (*pos - '0');
-#endif
- ++pos;
- }
-
-#ifdef _STRTOD_ENDPTR
- if (pos == pos0) { /* No digits? */
- pos = pos1; /* Back up to {e|E}/{p|P}. */
- } /* else */
-#endif
-
- exponent_power += negative * exponent_temp;
- }
-
-#ifdef _STRTOD_ZERO_CHECK
- if (number == 0.) {
- goto DONE;
- }
-#endif
-
- /* scale the result */
-#ifdef _STRTOD_LOG_SCALING
- exponent_temp = exponent_power;
-
- if (exponent_temp < 0) {
- exponent_temp = -exponent_temp;
- }
-
- while (exponent_temp) {
- if (exponent_temp & 1) {
- if (exponent_power < 0) {
- /* Warning... caluclating a factor for the exponent and
- * then dividing could easily be faster. But doing so
- * might cause problems when dealing with denormals. */
- number /= p_base;
- } else {
- number *= p_base;
- }
- }
- exponent_temp >>= 1;
- p_base *= p_base;
- }
-
-#else /* _STRTOD_LOG_SCALING */
- while (exponent_power) {
- if (exponent_power < 0) {
- number /= p_base;
- exponent_power++;
- } else {
- number *= p_base;
- exponent_power--;
- }
- }
-#endif /* _STRTOD_LOG_SCALING */
-
-#ifdef _STRTOD_ERRNO
- if (__FPMAX_ZERO_OR_INF_CHECK(number)) {
- __set_errno(ERANGE);
- }
-#endif
-
- DONE:
-#ifdef _STRTOD_ENDPTR
- if (endptr) {
- *endptr = pos;
- }
-#endif
-
- return number;
-}
-
-#endif /* defined(__UCLIBC_HAS_XLOCALE__) && !defined(__UCLIBC_DO_XLOCALE) */
-
-#endif
-/**********************************************************************/
-#ifdef L___fp_range_check
-#if defined(NEED_STRTOF_WRAPPER) || defined(NEED_STRTOD_WRAPPER)
-
-void attribute_hidden __fp_range_check(__fpmax_t y, __fpmax_t x)
-{
- if (__FPMAX_ZERO_OR_INF_CHECK(y) /* y is 0 or +/- infinity */
- && (y != 0) /* y is not 0 (could have x>0, y==0 if underflow) */
- && !__FPMAX_ZERO_OR_INF_CHECK(x) /* x is not 0 or +/- infinity */
- ) {
- __set_errno(ERANGE); /* Then x is not in y's range. */
- }
-}
-
-#endif
-#endif
-/**********************************************************************/
-#if defined(L_strtof) || defined(L_strtof_l) || defined(L_wcstof) || defined(L_wcstof_l)
-#if defined(NEED_STRTOF_WRAPPER)
-
-#if defined(L_wcstof) || defined(L_wcstof_l)
-#define strtof wcstof
-#define strtof_l wcstof_l
-#define __strtofpmax __wcstofpmax
-#define __strtofpmax_l __wcstofpmax_l
-#define Wchar wchar_t
-#else
-#define Wchar char
-#endif
-
-
-libc_hidden_proto(__XL_NPP(strtof))
-float __XL_NPP(strtof)(const Wchar *str, Wchar **endptr __LOCALE_PARAM )
-{
-#if FPMAX_TYPE == 1
- return __XL_NPP(__strtofpmax)(str, endptr, 0 __LOCALE_ARG );
-#else
- __fpmax_t x;
- float y;
-
- x = __XL_NPP(__strtofpmax)(str, endptr, 0 __LOCALE_ARG );
- y = (float) x;
-
- __fp_range_check(y, x);
-
- return y;
-#endif
-}
-libc_hidden_def(__XL_NPP(strtof))
-
-#endif
-#endif
-/**********************************************************************/
-#if defined(L_strtod) || defined(L_strtod_l) || defined(L_wcstod) || defined(L_wcstod_l)
-#if defined(NEED_STRTOD_WRAPPER)
-
-#if defined(L_wcstod) || defined(L_wcstod_l)
-#define strtod wcstod
-#define strtod_l wcstod_l
-#define __strtofpmax __wcstofpmax
-#define __strtofpmax_l __wcstofpmax_l
-#define Wchar wchar_t
-#else
-#define Wchar char
-#endif
-
-libc_hidden_proto(__XL_NPP(strtod))
-double __XL_NPP(strtod)(const Wchar *__restrict str,
- Wchar **__restrict endptr __LOCALE_PARAM )
-{
-#if FPMAX_TYPE == 2
- return __XL_NPP(__strtofpmax)(str, endptr, 0 __LOCALE_ARG );
-#else
- __fpmax_t x;
- double y;
-
- x = __XL_NPP(__strtofpmax)(str, endptr, 0 __LOCALE_ARG );
- y = (double) x;
-
- __fp_range_check(y, x);
-
- return y;
-#endif
-}
-libc_hidden_def(__XL_NPP(strtod))
-
-#endif
-#endif
-/**********************************************************************/
-#if defined(L_strtold) || defined(L_strtold_l) || defined(L_wcstold) || defined(L_wcstold_l)
-#if defined(NEED_STRTOLD_WRAPPER)
-
-#if defined(L_wcstold) || defined(L_wcstold_l)
-#define strtold wcstold
-#define strtold_l wcstold_l
-#define __strtofpmax __wcstofpmax
-#define __strtofpmax_l __wcstofpmax_l
-#define Wchar wchar_t
-#else
-#define Wchar char
-#endif
-
-libc_hidden_proto(__XL_NPP(strtold))
-long double __XL_NPP(strtold) (const Wchar *str, Wchar **endptr __LOCALE_PARAM )
-{
-#if FPMAX_TYPE == 3
- return __XL_NPP(__strtofpmax)(str, endptr, 0 __LOCALE_ARG );
-#else
- __fpmax_t x;
- long double y;
-
- x = __XL_NPP(__strtofpmax)(str, endptr, 0 __LOCALE_ARG );
- y = (long double) x;
-
- __fp_range_check(y, x);
-
- return y;
-#endif
-}
-libc_hidden_def(__XL_NPP(strtold))
-
-#endif
-#endif
-/**********************************************************************/
+#define L_strtod
+#include "_strtod.c"
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