diff options
Diffstat (limited to 'stdlib/strfmon_l.c')
| -rw-r--r-- | stdlib/strfmon_l.c | 636 |
1 files changed, 633 insertions, 3 deletions
diff --git a/stdlib/strfmon_l.c b/stdlib/strfmon_l.c index b0c82a337e..90076afc45 100644 --- a/stdlib/strfmon_l.c +++ b/stdlib/strfmon_l.c @@ -1,5 +1,5 @@ /* Formatting a monetary value according to the given locale. - Copyright (C) 1996, 1997, 2002 Free Software Foundation, Inc. + Copyright (C) 1996, 1997, 2002, 2004 Free Software Foundation, Inc. This file is part of the GNU C Library. Contributed by Ulrich Drepper <drepper@cygnus.com>, 1996. @@ -18,7 +18,637 @@ Software Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA. */ -#define USE_IN_EXTENDED_LOCALE_MODEL 1 -#include <strfmon.c> +#include <ctype.h> +#include <errno.h> +#include <langinfo.h> +#include <locale.h> +#include <monetary.h> +#ifdef USE_IN_LIBIO +# include "../libio/libioP.h" +# include "../libio/strfile.h" +#endif +#include <printf.h> +#include <stdarg.h> +#include <stdio.h> +#include <string.h> +#include "../locale/localeinfo.h" + +#define out_char(Ch) \ + do { \ + if (dest >= s + maxsize - 1) \ + { \ + __set_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 out_nstring(String, N) \ + do { \ + int _n = (N); \ + const char *_s = (String); \ + while (_n-- > 0) \ + out_char (*_s++); \ + } while (0) + +#define to_digit(Ch) ((Ch) - '0') + + +/* We use this code also for the extended locale handling where the + function gets as an additional argument the locale which has to be + used. To access the values we have to redefine the _NL_CURRENT + macro. */ +#undef _NL_CURRENT +#define _NL_CURRENT(category, item) \ + (current->values[_NL_ITEM_INDEX (item)].string) + +extern int __printf_fp (FILE *, const struct printf_info *, + const void *const *); +libc_hidden_proto (__printf_fp) +/* 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 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 +__vstrfmon_l (char *s, size_t maxsize, __locale_t loc, const char *format, + va_list ap) +{ + struct locale_data *current = loc->__locales[LC_MONETARY]; +#ifdef USE_IN_LIBIO + _IO_strfile f; +# ifdef _IO_MTSAFE_IO + _IO_lock_t lock; +# endif +#else + FILE f; +#endif + struct printf_info info; + char *dest; /* Pointer so copy the output. */ + const char *fmt; /* Pointer that walks through 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 int_format; + int print_curr_symbol; + int left_prec; + int left_pad; + int right_prec; + int group; + char pad; + int is_long_double; + int p_sign_posn; + int n_sign_posn; + int sign_posn; + int other_sign_posn; + int left; + int is_negative; + int sep_by_space; + int other_sep_by_space; + int cs_precedes; + int other_cs_precedes; + const char *sign_string; + const char *other_sign_string; + int done; + const char *currency_symbol; + size_t currency_symbol_len; + int width; + char *startp; + const void *ptr; + char space_char; + + /* 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. */ + int_format = 0; /* Use international curr. symbol */ + 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; + if (pad == '\0') + { + /* Premature EOS. */ + __set_errno (EINVAL); + return -1; + } + continue; + case '^': /* Don't group digits. */ + group = 0; + continue; + case '+': /* Use +/- for sign of number. */ + if (n_sign_posn != -1) + { + __set_errno (EINVAL); + return -1; + } + p_sign_posn = *_NL_CURRENT (LC_MONETARY, P_SIGN_POSN); + n_sign_posn = *_NL_CURRENT (LC_MONETARY, N_SIGN_POSN); + continue; + case '(': /* Use ( ) for negative sign. */ + if (n_sign_posn != -1) + { + __set_errno (EINVAL); + return -1; + } + p_sign_posn = 0; + n_sign_posn = 0; + 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) + { + __set_errno (E2BIG); + return -1; + } + } + + /* Recognize left precision. */ + if (*fmt == '#') + { + if (!isdigit (*++fmt)) + { + __set_errno (EINVAL); + 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)) + { + __set_errno (EINVAL); + 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. */ + char int_symbol[4]; + switch (*fmt++) + { + case 'i': { /* Use international currency symbol. */ + const char *int_curr_symbol; + + int_curr_symbol = _NL_CURRENT (LC_MONETARY, INT_CURR_SYMBOL); + strncpy(int_symbol, int_curr_symbol, 3); + int_symbol[3] = '\0'; + + currency_symbol_len = 3; + currency_symbol = &int_symbol[0]; + space_char = int_curr_symbol[3]; + int_format = 1; + break; + } + case 'n': /* Use national currency symbol. */ + currency_symbol = _NL_CURRENT (LC_MONETARY, CURRENCY_SYMBOL); + currency_symbol_len = strlen (currency_symbol); + space_char = ' '; + int_format = 0; + break; + default: /* Any unrecognized format is an error. */ + __set_errno (EINVAL); + return -1; + } + + /* If not specified by the format string now find the values for + the format specification. */ + if (p_sign_posn == -1) + p_sign_posn = *_NL_CURRENT (LC_MONETARY, int_format ? INT_P_SIGN_POSN : P_SIGN_POSN); + if (n_sign_posn == -1) + n_sign_posn = *_NL_CURRENT (LC_MONETARY, int_format ? INT_N_SIGN_POSN : N_SIGN_POSN); + + if (right_prec == -1) + { + right_prec = *_NL_CURRENT (LC_MONETARY, int_format ? INT_FRAC_DIGITS : FRAC_DIGITS); + + if (right_prec == CHAR_MAX) + right_prec = 2; + } + + /* 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_string = _NL_CURRENT (LC_MONETARY, NEGATIVE_SIGN); + /* If the locale does not specify a character for the + negative sign we use a '-'. */ + if (*sign_string == '\0') + sign_string = (const char *) "-"; + cs_precedes = *_NL_CURRENT (LC_MONETARY, int_format ? INT_N_CS_PRECEDES : N_CS_PRECEDES); + sep_by_space = *_NL_CURRENT (LC_MONETARY, int_format ? INT_N_SEP_BY_SPACE : N_SEP_BY_SPACE); + sign_posn = n_sign_posn; + + other_sign_string = _NL_CURRENT (LC_MONETARY, POSITIVE_SIGN); + other_cs_precedes = *_NL_CURRENT (LC_MONETARY, int_format ? INT_P_CS_PRECEDES : P_CS_PRECEDES); + other_sep_by_space = *_NL_CURRENT (LC_MONETARY, int_format ? INT_P_SEP_BY_SPACE : P_SEP_BY_SPACE); + other_sign_posn = p_sign_posn; + } + else + { + sign_string = _NL_CURRENT (LC_MONETARY, POSITIVE_SIGN); + cs_precedes = *_NL_CURRENT (LC_MONETARY, int_format ? INT_P_CS_PRECEDES : P_CS_PRECEDES); + sep_by_space = *_NL_CURRENT (LC_MONETARY, int_format ? INT_P_SEP_BY_SPACE : P_SEP_BY_SPACE); + sign_posn = p_sign_posn; + + other_sign_string = _NL_CURRENT (LC_MONETARY, NEGATIVE_SIGN); + if (*other_sign_string == '\0') + other_sign_string = (const char *) "-"; + other_cs_precedes = *_NL_CURRENT (LC_MONETARY, int_format ? INT_N_CS_PRECEDES : N_CS_PRECEDES); + other_sep_by_space = *_NL_CURRENT (LC_MONETARY, int_format ? INT_N_SEP_BY_SPACE : N_SEP_BY_SPACE); + other_sign_posn = n_sign_posn; + } + + /* Set default values for unspecified information. */ + if (cs_precedes != 0) + cs_precedes = 1; + if (other_cs_precedes != 0) + other_cs_precedes = 1; + if (sep_by_space == CHAR_MAX) + sep_by_space = 0; + if (other_sep_by_space == CHAR_MAX) + other_sep_by_space = 0; + if (sign_posn == CHAR_MAX) + sign_posn = 1; + if (other_sign_posn == CHAR_MAX) + other_sign_posn = 1; + + /* Check for degenerate cases */ + if (sep_by_space == 2) + { + if (sign_posn == 0 || + (sign_posn == 1 && !cs_precedes) || + (sign_posn == 2 && cs_precedes)) + /* sign and symbol are not adjacent, so no separator */ + sep_by_space = 0; + } + if (other_sep_by_space == 2) + { + if (other_sign_posn == 0 || + (other_sign_posn == 1 && !other_cs_precedes) || + (other_sign_posn == 2 && other_cs_precedes)) + /* sign and symbol are not adjacent, so no separator */ + other_sep_by_space = 0; + } + + /* Set the left precision and padding needed for alignment */ + if (left_prec == -1) + { + left_prec = 0; + left_pad = 0; + } + else + { + /* Set left_pad to number of spaces needed to align positive + and negative formats */ + + int left_bytes = 0; + int other_left_bytes = 0; + + /* Work out number of bytes for currency string and separator + preceding the value */ + if (cs_precedes) + { + left_bytes += currency_symbol_len; + if (sep_by_space != 0) + ++left_bytes; + } + + if (other_cs_precedes) + { + other_left_bytes += currency_symbol_len; + if (other_sep_by_space != 0) + ++other_left_bytes; + } + + /* Work out number of bytes for the sign (or left parenthesis) + preceding the value */ + if (sign_posn == 0 && is_negative) + ++left_bytes; + else if (sign_posn == 1) + left_bytes += strlen (sign_string); + else if (cs_precedes && (sign_posn == 3 || sign_posn == 4)) + left_bytes += strlen (sign_string); + + if (other_sign_posn == 0 && !is_negative) + ++other_left_bytes; + else if (other_sign_posn == 1) + other_left_bytes += strlen (other_sign_string); + else if (other_cs_precedes && + (other_sign_posn == 3 || other_sign_posn == 4)) + other_left_bytes += strlen (other_sign_string); + + /* Compare the number of bytes preceding the value for + each format, and set the padding accordingly */ + if (other_left_bytes > left_bytes) + left_pad = other_left_bytes - left_bytes; + else + left_pad = 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 length. */ + + while (left_pad-- > 0) + out_char (' '); + + if (sign_posn == 0 && is_negative) + out_char (left_paren); + + if (cs_precedes) + { + if (sign_posn != 0 && sign_posn != 2 && sign_posn != 4 + && sign_posn != 5) + { + out_string (sign_string); + 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 (space_char); + out_string (sign_string); + if (sep_by_space == 1) + /* POSIX.2 and SUS are not clear on this case, but C99 + says a space follows the adjacent-symbol-and-sign */ + out_char (' '); + } + else + if (sep_by_space == 1) + out_char (space_char); + } + } + else + if (sign_posn != 0 && sign_posn != 2 && sign_posn != 3 + && sign_posn != 4 && sign_posn != 5) + out_string (sign_string); + + /* Print the number. */ +#ifdef USE_IN_LIBIO +# ifdef _IO_MTSAFE_IO + f._sbf._f._lock = &lock; +# endif + INTUSE(_IO_init) ((_IO_FILE *) &f, 0); + _IO_JUMPS ((struct _IO_FILE_plus *) &f) = &_IO_str_jumps; + INTUSE(_IO_str_init_static) ((_IO_strfile *) &f, dest, + (s + maxsize) - dest, dest); +#else + memset ((void *) &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 = 0; + info.showsign = 0; + info.group = group; + info.pad = pad; + info.extra = 1; /* This means use values from LC_MONETARY. */ + info.wide = 0; + + ptr = &fpnum; + done = __printf_fp ((FILE *) &f, &info, &ptr); + if (done < 0) + return -1; + + if (s[maxsize - 1] != '\0') + { + __set_errno (E2BIG); + return -1; + } + + dest += done; + + if (!cs_precedes) + { + if (sign_posn == 3) + { + if (sep_by_space == 1) + out_char (' '); + out_string (sign_string); + } + + if (print_curr_symbol) + { + if ((sign_posn == 3 && sep_by_space == 2) + || (sign_posn == 4 && sep_by_space == 1) + || (sign_posn == 2 && sep_by_space == 1) + || (sign_posn == 1 && sep_by_space == 1) + || (sign_posn == 0 && sep_by_space == 1)) + out_char (space_char); + out_nstring (currency_symbol, currency_symbol_len); + if (sign_posn == 4) + { + if (sep_by_space == 2) + out_char (' '); + out_string (sign_string); + } + } + } + + if (sign_posn == 2) + { + if (sep_by_space == 2) + out_char (' '); + out_string (sign_string); + } + + if (sign_posn == 0 && is_negative) + out_char (right_paren); + + /* 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. */ + *dest = '\0'; + + return dest - s; +} + +ssize_t +__strfmon_l (char *s, size_t maxsize, __locale_t loc, const char *format, ...) +{ + va_list ap; + + va_start (ap, format); + + ssize_t res = __vstrfmon_l (s, maxsize, loc, format, ap); + + va_end (ap); + + return res; +} weak_alias (__strfmon_l, strfmon_l) |