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-rw-r--r--stdlib/strfmon.c504
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diff --git a/stdlib/strfmon.c b/stdlib/strfmon.c
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+++ b/stdlib/strfmon.c
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+/* strfmon -- formating a monetary value according to the current locale
+Copyright (C) 1996 Free Software Foundation, Inc.
+This file is part of the GNU C Library.
+Contributed by Ulrich Drepper <drepper@cygnus.com>
+and Jochen Hein <Jochen.Hein@informatik.TU-Clausthal.de>, 1996.
+
+The GNU C Library is free software; you can redistribute it and/or
+modify it under the terms of the GNU Library General Public License as
+published by the Free Software Foundation; either version 2 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
+Library General Public License for more details.
+
+You should have received a copy of the GNU Library General Public
+License along with the GNU C Library; see the file COPYING.LIB. If
+not, write to the Free Software Foundation, Inc., 59 Temple Place - Suite 330,
+Boston, MA 02111-1307, USA. */
+
+#include <ctype.h>
+#include <errno.h>
+#include <langinfo.h>
+#include <monetary.h>
+#ifdef USE_IN_LIBIO
+# include "../libio/libioP.h"
+# include "../libio/strfile.h"
+#endif
+#include <stdarg.h>
+#include <stdio.h>
+#include <string.h>
+#include "../stdio-common/printf.h"
+#include "../locale/localeinfo.h"
+
+
+#define out_char(Ch) \
+ do { \
+ if (dest >= s + maxsize - 1) \
+ { \
+ errno = E2BIG; \
+ va_end (ap); \
+ return -1; \
+ } \
+ *dest++ = (Ch); \
+ } while (0)
+
+#define out_string(String) \
+ do { \
+ const char *_s = (String); \
+ while (*_s) \
+ out_char (*_s++); \
+ } while (0)
+
+#define to_digit(Ch) ((Ch) - '0')
+
+extern int __printf_fp (FILE *, const struct printf_info *,
+ const void **const);
+/* This function determines the number of digit groups in the output.
+ The definition is in printf_fp.c. */
+extern unsigned int __guess_grouping (unsigned int intdig_max,
+ const char *grouping, wchar_t sepchar);
+
+
+/* We have to overcome some problems with this implementation. On the
+ one hand the strfmon() function is specified by in XPG4 and of
+ course it has to follow this. But on the other hand POSIX.2
+ specifies some information in the LC_MONETARY category which should
+ be used, too. Some of the information contradicts the information
+ which can be specified in format string. */
+ssize_t
+strfmon (char *s, size_t maxsize, const char *format, ...)
+{
+#ifdef USE_IN_LIBIO
+ _IO_strfile f;
+#else
+ FILE f;
+#endif
+ struct printf_info info;
+ va_list ap; /* Scan through the varargs. */
+ char *dest; /* Pointer so copy the output. */
+ const char *fmt; /* Pointer that walks through format. */
+
+ va_start (ap, format);
+
+ dest = s;
+ fmt = format;
+
+ /* Loop through the format-string. */
+ while (*fmt != '\0')
+ {
+ /* The floating-point value to output. */
+ union
+ {
+ double dbl;
+ __long_double_t ldbl;
+ }
+ fpnum;
+ int print_curr_symbol;
+ int left_prec;
+ int right_prec;
+ int group;
+ char pad;
+ int is_long_double;
+ int p_sign_posn;
+ int n_sign_posn;
+ int sign_posn;
+ int left;
+ int is_negative;
+ int sep_by_space;
+ int cs_precedes;
+ char sign_char;
+ int done;
+ const char *currency_symbol;
+ int width;
+ char *startp;
+ const void *ptr;
+
+ /* Process all character which do not introduce a format
+ specification. */
+ if (*fmt != '%')
+ {
+ out_char (*fmt++);
+ continue;
+ }
+
+ /* "%%" means a single '%' character. */
+ if (fmt[1] == '%')
+ {
+ out_char (*++fmt);
+ ++fmt;
+ continue;
+ }
+
+ /* Defaults for formatting. */
+ print_curr_symbol = 1; /* Print the currency symbol. */
+ left_prec = -1; /* No left precision specified. */
+ right_prec = -1; /* No right precision specified. */
+ group = 1; /* Print digits grouped. */
+ pad = ' '; /* Fill character is <SP>. */
+ is_long_double = 0; /* Double argument by default. */
+ p_sign_posn = -1; /* This indicates whether the */
+ n_sign_posn = -1; /* '(' flag is given. */
+ width = -1; /* No width specified so far. */
+ left = 0; /* Right justified by default. */
+
+ /* Parse group characters. */
+ while (1)
+ {
+ switch (*++fmt)
+ {
+ case '=': /* Set fill character. */
+ pad = *++fmt;
+ continue;
+ case '^': /* Don't group digits. */
+ group = 0;
+ continue;
+ case '+': /* Use +/- for sign of number. */
+ if (n_sign_posn != -1)
+ {
+ errno = EINVAL;
+ va_end (ap);
+ return -1;
+ }
+ if (*_NL_CURRENT (LC_MONETARY, P_SIGN_POSN) == '\0')
+ p_sign_posn = 1;
+ else
+ p_sign_posn = *_NL_CURRENT (LC_MONETARY, P_SIGN_POSN);
+ if (*_NL_CURRENT (LC_MONETARY, N_SIGN_POSN) == '\0')
+ n_sign_posn = 1;
+ else
+ n_sign_posn = *_NL_CURRENT (LC_MONETARY, N_SIGN_POSN);
+ continue;
+ case '(': /* Use ( ) for negative sign. */
+ if (n_sign_posn != -1)
+ {
+ errno = EINVAL;
+ va_end (ap);
+ return -1;
+ }
+ n_sign_posn = 5; /* This is a else unused value. */
+ continue;
+ case '!': /* Don't print the currency symbol. */
+ print_curr_symbol = 0;
+ continue;
+ case '-': /* Print left justified. */
+ left = 1;
+ continue;
+ default:
+ /* Will stop the loop. */;
+ }
+ break;
+ }
+
+ if (isdigit (*fmt))
+ {
+ /* Parse field width. */
+ width = to_digit (*fmt);
+
+ while (isdigit (*++fmt))
+ {
+ width *= 10;
+ width += to_digit (*fmt);
+ }
+
+ /* If we don't have enough room for the demanded width we
+ can stop now and return an error. */
+ if (dest + width >= s + maxsize)
+ {
+ errno = E2BIG;
+ va_end (ap);
+ return -1;
+ }
+ }
+
+ /* Recognize left precision. */
+ if (*fmt == '#')
+ {
+ if (!isdigit (*++fmt))
+ {
+ errno = EINVAL;
+ va_end (ap);
+ return -1;
+ }
+ left_prec = to_digit (*fmt);
+
+ while (isdigit (*++fmt))
+ {
+ left_prec *= 10;
+ left_prec += to_digit (*fmt);
+ }
+ }
+
+ /* Recognize right precision. */
+ if (*fmt == '.')
+ {
+ if (!isdigit (*++fmt))
+ {
+ errno = EINVAL;
+ va_end (ap);
+ return -1;
+ }
+ right_prec = to_digit (*fmt);
+
+ while (isdigit (*++fmt))
+ {
+ right_prec *= 10;
+ right_prec += to_digit (*fmt);
+ }
+ }
+
+ /* Handle modifier. This is an extension. */
+ if (*fmt == 'L')
+ {
+ ++fmt;
+ is_long_double = 1;
+ }
+
+ /* Handle format specifier. */
+ switch (*fmt++)
+ {
+ case 'i': /* Use international currency symbol. */
+ currency_symbol = _NL_CURRENT (LC_MONETARY, INT_CURR_SYMBOL);
+ if (right_prec == -1)
+ if (*_NL_CURRENT (LC_MONETARY, INT_FRAC_DIGITS) == '\177')
+ right_prec = 2;
+ else
+ right_prec = *_NL_CURRENT (LC_MONETARY, INT_FRAC_DIGITS);
+ break;
+ case 'n': /* Use national currency symbol. */
+ currency_symbol = _NL_CURRENT (LC_MONETARY, CURRENCY_SYMBOL);
+ if (right_prec == -1)
+ if (*_NL_CURRENT (LC_MONETARY, FRAC_DIGITS) == '\177')
+ right_prec = 2;
+ else
+ right_prec = *_NL_CURRENT (LC_MONETARY, FRAC_DIGITS);
+ break;
+ default: /* Any unrecognized format is an error. */
+ errno = EINVAL;
+ va_end (ap);
+ return -1;
+ }
+
+ /* If we have to print the digits grouped determine how many
+ extra characters this means. */
+ if (group && left_prec != -1)
+ left_prec += __guess_grouping (left_prec,
+ _NL_CURRENT (LC_MONETARY, MON_GROUPING),
+ *_NL_CURRENT (LC_MONETARY,
+ MON_THOUSANDS_SEP));
+
+ /* Now it's time to get the value. */
+ if (is_long_double == 1)
+ {
+ fpnum.ldbl = va_arg (ap, long double);
+ is_negative = fpnum.ldbl < 0;
+ if (is_negative)
+ fpnum.ldbl = -fpnum.ldbl;
+ }
+ else
+ {
+ fpnum.dbl = va_arg (ap, double);
+ is_negative = fpnum.dbl < 0;
+ if (is_negative)
+ fpnum.dbl = -fpnum.dbl;
+ }
+
+ /* We now know the sign of the value and can determine the format. */
+ if (is_negative)
+ {
+ sign_char = *_NL_CURRENT (LC_MONETARY, NEGATIVE_SIGN);
+ /* If the locale does not specify a character for the
+ negative sign we use a '-'. */
+ if (sign_char == '\0')
+ sign_char = '-';
+ cs_precedes = *_NL_CURRENT (LC_MONETARY, N_CS_PRECEDES);
+ sep_by_space = *_NL_CURRENT (LC_MONETARY, N_SEP_BY_SPACE);
+ /* If the '(' flag is not given use the sign position from
+ the current locale. */
+ if (n_sign_posn == -1)
+ sign_posn = *_NL_CURRENT (LC_MONETARY, N_SIGN_POSN);
+ else
+ /* This means use parentheses. */
+ sign_posn = 0;
+ }
+ else
+ {
+ sign_char = *_NL_CURRENT (LC_MONETARY, POSITIVE_SIGN);
+ /* If the locale does not specify a character for the
+ positive sign we use a <SP>. */
+ if (sign_char == '\0')
+ sign_char = ' ';
+ cs_precedes = *_NL_CURRENT (LC_MONETARY, P_CS_PRECEDES);
+ sep_by_space = *_NL_CURRENT (LC_MONETARY, P_SEP_BY_SPACE);
+ if (n_sign_posn == -1)
+ sign_posn = *_NL_CURRENT (LC_MONETARY, P_SIGN_POSN);
+ else
+ /* Here we don't set SIGN_POSN to 0 because we don'want to
+ print <SP> instead of the braces and this is what the
+ value 5 means. */
+ sign_posn = 5;
+ }
+
+ /* Set default values for unspecified information. */
+ if (cs_precedes != 0)
+ cs_precedes = 1;
+ if (sep_by_space == 127)
+ sep_by_space = 0;
+ if (left_prec == -1)
+ left_prec = 0;
+
+
+ /* Perhaps we'll someday make these things configurable so
+ better start using symbolic names now. */
+#define left_paren '('
+#define right_paren ')'
+
+ startp = dest; /* Remember start so we can compute lenght. */
+
+ if (sign_posn == 0)
+ out_char (left_paren);
+ if (sign_posn == 5) /* This is for positive number and ( flag. */
+ out_char (' ');
+
+ if (cs_precedes)
+ {
+ if (sign_posn != 0 && sign_posn != 2 && sign_posn != 4
+ && sign_posn != 5)
+ {
+ out_char (sign_char);
+ if (sep_by_space == 2)
+ out_char (' ');
+ }
+
+ if (print_curr_symbol)
+ {
+ out_string (currency_symbol);
+
+ if (sign_posn == 4)
+ {
+ if (sep_by_space == 2)
+ out_char (' ');
+ out_char (sign_char);
+ }
+ else
+ if (sep_by_space == 1)
+ out_char (' ');
+ }
+ }
+ else
+ if (sign_posn != 0 && sign_posn != 2 && sign_posn != 3
+ && sign_posn != 4 && sign_posn != 5)
+ out_char (sign_char);
+
+ /* Print the number. */
+#ifdef USE_IN_LIBIO
+ _IO_init ((_IO_FILE *) &f, 0);
+ _IO_JUMPS ((_IO_FILE *) &f) = &_IO_str_jumps;
+ _IO_str_init_static ((_IO_FILE *) &f, dest, (s + maxsize) - dest, dest);
+#else
+ memset((PTR) &f, 0, sizeof(f));
+ f.__magic = _IOMAGIC;
+ f.__mode.__write = 1;
+ /* The buffer size is one less than MAXLEN
+ so we have space for the null terminator. */
+ f.__bufp = f.__buffer = (char *) dest;
+ f.__bufsize = (s + maxsize) - dest;
+ f.__put_limit = f.__buffer + f.__bufsize;
+ f.__get_limit = f.__buffer;
+ /* After the buffer is full (MAXLEN characters have been written),
+ any more characters written will go to the bit bucket. */
+ f.__room_funcs = __default_room_functions;
+ f.__io_funcs.__write = NULL;
+ f.__seen = 1;
+#endif
+ /* We clear the last available byte so we can find out whether
+ the numeric representation is too long. */
+ s[maxsize - 1] = '\0';
+
+ info.prec = right_prec;
+ info.width = left_prec + (right_prec ? (right_prec + 1) : 0);
+ info.spec = 'f';
+ info.is_long_double = is_long_double;
+ info.is_short = 0;
+ info.is_long = 0;
+ info.alt = 0;
+ info.space = 0;
+ info.left = left;
+ info.showsign = 0;
+ info.group = group;
+ info.pad = pad;
+ info.extra = 1; /* This means use values from LC_MONETARY. */
+
+ ptr = &fpnum;
+ done = __printf_fp ((FILE *) &f, &info, &ptr);
+ if (done < 0)
+ {
+ va_end (ap);
+ return -1;
+ }
+
+ if (s[maxsize - 1] != '\0')
+ return -1;
+
+ dest += done;
+
+ if (!cs_precedes)
+ {
+ if (sign_posn == 3)
+ {
+ if (sep_by_space == 1)
+ out_char (' ');
+ out_char (sign_char);
+ }
+
+ if (print_curr_symbol)
+ {
+ if (sign_posn == 3 && sep_by_space == 2)
+ out_char (' ');
+ out_string (currency_symbol);
+ }
+ }
+ else
+ if (sign_posn == 2)
+ {
+ if (sep_by_space == 2)
+ out_char (' ');
+ out_char (sign_char);
+ }
+
+ if (sign_posn == 0)
+ out_char (right_paren);
+ if (sign_posn == 5)
+ out_char (' '); /* This is for positive number and ( flag. */
+
+ /* Now test whether the output width is filled. */
+ if (dest - startp < width)
+ if (left)
+ /* We simply have to fill using spaces. */
+ do
+ out_char (' ');
+ while (dest - startp < width);
+ else
+ {
+ int dist = width - (dest - startp);
+ char *cp;
+ for (cp = dest - 1; cp >= startp; --cp)
+ cp[dist] = cp[0];
+
+ dest += dist;
+
+ do
+ startp[--dist] = ' ';
+ while (dist > 0);
+ }
+ }
+
+ /* Terminate the string. */
+ out_char ('\0');
+
+ va_end (ap);
+
+ return dest - s - 1;
+}