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Diffstat (limited to 'stdlib/strfrom-skeleton.c')
| -rw-r--r-- | stdlib/strfrom-skeleton.c | 155 |
1 files changed, 0 insertions, 155 deletions
diff --git a/stdlib/strfrom-skeleton.c b/stdlib/strfrom-skeleton.c deleted file mode 100644 index 5841919fe4..0000000000 --- a/stdlib/strfrom-skeleton.c +++ /dev/null @@ -1,155 +0,0 @@ -/* Convert a floating-point number to string. - Copyright (C) 2016-2017 Free Software Foundation, Inc. - This file is part of the GNU C Library. - - The GNU C 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. - - The GNU C 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 the GNU C Library; if not, see - <http://www.gnu.org/licenses/>. */ - -/* Generic implementation for strfrom functions. The implementation is generic - for several floating-point types (e.g.: float, double), so that each - function, such as strfromf and strfroml, share the same code, thus avoiding - code duplication. */ - -#include <ctype.h> -#include "../libio/libioP.h" -#include "../libio/strfile.h" -#include <printf.h> -#include <string.h> -#include <locale/localeinfo.h> - -#define UCHAR_T char -#define L_(Str) Str -#define ISDIGIT(Ch) isdigit (Ch) -#include "stdio-common/printf-parse.h" - -int -STRFROM (char *dest, size_t size, const char *format, FLOAT f) -{ - _IO_strnfile sfile; -#ifdef _IO_MTSAFE_IO - sfile.f._sbf._f._lock = NULL; -#endif - - int done; - - /* Single-precision values need to be stored in a double type, because - __printf_fp_l and __printf_fphex do not accept the float type. */ - union { - double flt; - FLOAT value; - } fpnum; - const void *fpptr; - fpptr = &fpnum; - - /* Variables to control the output format. */ - int precision = -1; /* printf_fp and printf_fphex treat this internally. */ - int specifier; - struct printf_info info; - - /* Single-precision values need to be converted into double-precision, - because __printf_fp and __printf_fphex only accept double and long double - as the floating-point argument. */ - if (__builtin_types_compatible_p (FLOAT, float)) - fpnum.flt = f; - else - fpnum.value = f; - - /* Check if the first character in the format string is indeed the '%' - character. Otherwise, abort. */ - if (*format == '%') - format++; - else - abort (); - - /* The optional precision specification always starts with a '.'. If such - character is present, read the precision. */ - if (*format == '.') - { - format++; - - /* Parse the precision. */ - if (ISDIGIT (*format)) - precision = read_int (&format); - /* If only the period is specified, the precision is taken as zero, as - described in ISO/IEC 9899:2011, section 7.21.6.1, 4th paragraph, 3rd - item. */ - else - precision = 0; - } - - /* Now there is only the conversion specifier to be read. */ - switch (*format) - { - case 'a': - case 'A': - case 'e': - case 'E': - case 'f': - case 'F': - case 'g': - case 'G': - specifier = *format; - break; - default: - abort (); - } - - /* The following code to prepare the virtual file has been adapted from the - function _IO_vsnprintf from libio. */ - - if (size == 0) - { - /* When size is zero, nothing is written and dest may be a null pointer. - This is specified for snprintf in ISO/IEC 9899:2011, Section 7.21.6.5, - in the second paragraph. Thus, if size is zero, prepare to use the - overflow buffer right from the start. */ - dest = sfile.overflow_buf; - size = sizeof (sfile.overflow_buf); - } - - /* Prepare the virtual string file. */ - _IO_no_init (&sfile.f._sbf._f, _IO_USER_LOCK, -1, NULL, NULL); - _IO_JUMPS (&sfile.f._sbf) = &_IO_strn_jumps; - _IO_str_init_static_internal (&sfile.f, dest, size - 1, dest); - - /* Prepare the format specification for printf_fp. */ - memset (&info, '\0', sizeof (info)); - - /* The functions strfromd and strfromf pass a floating-point number with - double precision to printf_fp, whereas strfroml passes a floating-point - number with long double precision. The following line informs printf_fp - which type of floating-point number is being passed. */ - info.is_long_double = __builtin_types_compatible_p (FLOAT, long double); - - /* Similarly, the function strfromf128 passes a floating-point number in - _Float128 format to printf_fp. */ -#if __HAVE_DISTINCT_FLOAT128 - info.is_binary128 = __builtin_types_compatible_p (FLOAT, _Float128); -#endif - - /* Set info according to the format string. */ - info.prec = precision; - info.spec = specifier; - - if (info.spec != 'a' && info.spec != 'A') - done = __printf_fp_l (&sfile.f._sbf._f, _NL_CURRENT_LOCALE, &info, &fpptr); - else - done = __printf_fphex (&sfile.f._sbf._f, &info, &fpptr); - - /* Terminate the string. */ - if (sfile.f._sbf._f._IO_buf_base != sfile.overflow_buf) - *sfile.f._sbf._f._IO_write_ptr = '\0'; - - return done; -} |