-/*-
- * Copyright (c) 2001 Alexey Zelkin <phantom@FreeBSD.org>
- * All rights reserved.
- *
- * Redistribution and use in source and binary forms, with or without
- * modification, are permitted provided that the following conditions
- * are met:
- * 1. Redistributions of source code must retain the above copyright
- * notice, this list of conditions and the following disclaimer.
- * 2. Redistributions in binary form must reproduce the above copyright
- * notice, this list of conditions and the following disclaimer in the
- * documentation and/or other materials provided with the distribution.
- *
- * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
- * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
- * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
- * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
- * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
- * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
- * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
- * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
- * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
- * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
- * SUCH DAMAGE.
- *
- */
-
-#include <sys/cdefs.h>
-__FBSDID("$FreeBSD: src/lib/libc/stdlib/strfmon.c,v 1.14 2003/03/20 08:18:55 ache Exp $");
-
-#include <sys/types.h>
-#include <ctype.h>
-#include <errno.h>
-#include <limits.h>
-#include <locale.h>
-#include <stdarg.h>
-#include <stdio.h>
-#include <stdlib.h>
-#include <string.h>
-
-/* internal flags */
-#define NEED_GROUPING 0x01 /* print digits grouped (default) */
-#define SIGN_POSN_USED 0x02 /* '+' or '(' usage flag */
-#define LOCALE_POSN 0x04 /* use locale defined +/- (default) */
-#define PARENTH_POSN 0x08 /* enclose negative amount in () */
-#define SUPRESS_CURR_SYMBOL 0x10 /* supress the currency from output */
-#define LEFT_JUSTIFY 0x20 /* left justify */
-#define USE_INTL_CURRENCY 0x40 /* use international currency symbol */
-#define IS_NEGATIVE 0x80 /* is argument value negative ? */
-
-/* internal macros */
-#define PRINT(CH) do { \
- if (dst >= s + maxsize) \
- goto e2big_error; \
- *dst++ = CH; \
-} while (0)
-
-#define PRINTS(STR) do { \
- char *tmps = STR; \
- while (*tmps != '\0') \
- PRINT(*tmps++); \
-} while (0)
-
-#define GET_NUMBER(VAR) do { \
- VAR = 0; \
- while (isdigit((unsigned char)*fmt)) { \
- VAR *= 10; \
- VAR += *fmt - '0'; \
- fmt++; \
- } \
-} while (0)
-
-#define GRPCPY(howmany) do { \
- int i = howmany; \
- while (i-- > 0) { \
- avalue_size--; \
- *--bufend = *(avalue+avalue_size+padded); \
- } \
-} while (0)
-
-#define GRPSEP do { \
- *--bufend = thousands_sep; \
- groups++; \
-} while (0)
-
-static void __setup_vars(int, char *, char *, char *, char **);
-static int __calc_left_pad(int, char *);
-static char *__format_grouped_double(double, int *, int, int, int);
-
-ssize_t
-strfmon(char * __restrict s, size_t maxsize, const char * __restrict format,
- ...)
-{
- va_list ap;
- char *dst; /* output destination pointer */
- const char *fmt; /* current format poistion pointer */
- struct lconv *lc; /* pointer to lconv structure */
- char *asciivalue; /* formatted double pointer */
-
- int flags; /* formatting options */
- int pad_char; /* padding character */
- int pad_size; /* pad size */
- int width; /* field width */
- int left_prec; /* left precision */
- int right_prec; /* right precision */
- double value; /* just value */
- char space_char = ' '; /* space after currency */
-
- char cs_precedes, /* values gathered from struct lconv */
- sep_by_space,
- sign_posn,
- *signstr,
- *currency_symbol;
-
- char *tmpptr; /* temporary vars */
- int sverrno;
-
- va_start(ap, format);
-
- lc = localeconv();
- dst = s;
- fmt = format;
- asciivalue = NULL;
- currency_symbol = NULL;
- pad_size = 0;
-
- while (*fmt) {
- /* pass nonformating characters AS IS */
- if (*fmt != '%')
- goto literal;
-
- /* '%' found ! */
-
- /* "%%" mean just '%' */
- if (*(fmt+1) == '%') {
- fmt++;
- literal:
- PRINT(*fmt++);
- continue;
- }
-
- /* set up initial values */
- flags = (NEED_GROUPING|LOCALE_POSN);
- pad_char = ' '; /* padding character is "space" */
- left_prec = -1; /* no left precision specified */
- right_prec = -1; /* no right precision specified */
- width = -1; /* no width specified */
- value = 0; /* we have no value to print now */
-
- /* Flags */
- while (1) {
- switch (*++fmt) {
- case '=': /* fill character */
- pad_char = *++fmt;
- if (pad_char == '\0')
- goto format_error;
- continue;
- case '^': /* not group currency */
- flags &= ~(NEED_GROUPING);
- continue;
- case '+': /* use locale defined signs */
- if (flags & SIGN_POSN_USED)
- goto format_error;
- flags |= (SIGN_POSN_USED|LOCALE_POSN);
- continue;
- case '(': /* enclose negatives with () */
- if (flags & SIGN_POSN_USED)
- goto format_error;
- flags |= (SIGN_POSN_USED|PARENTH_POSN);
- continue;
- case '!': /* suppress currency symbol */
- flags |= SUPRESS_CURR_SYMBOL;
- continue;
- case '-': /* alignment (left) */
- flags |= LEFT_JUSTIFY;
- continue;
- default:
- break;
- }
- break;
- }
-
- /* field Width */
- if (isdigit((unsigned char)*fmt)) {
- GET_NUMBER(width);
- /* Do we have enough space to put number with
- * required width ?
- */
- if (dst + width >= s + maxsize)
- goto e2big_error;
- }
-
- /* Left precision */
- if (*fmt == '#') {
- if (!isdigit((unsigned char)*++fmt))
- goto format_error;
- GET_NUMBER(left_prec);
- }
-
- /* Right precision */
- if (*fmt == '.') {
- if (!isdigit((unsigned char)*++fmt))
- goto format_error;
- GET_NUMBER(right_prec);
- }
-
- /* Conversion Characters */
- switch (*fmt++) {
- case 'i': /* use internaltion currency format */
- flags |= USE_INTL_CURRENCY;
- break;
- case 'n': /* use national currency format */
- flags &= ~(USE_INTL_CURRENCY);
- break;
- default: /* required character is missing or
- premature EOS */
- goto format_error;
- }
-
- if (flags & USE_INTL_CURRENCY) {
- currency_symbol = strdup(lc->int_curr_symbol);
- if (currency_symbol != NULL)
- space_char = *(currency_symbol+3);
- } else
- currency_symbol = strdup(lc->currency_symbol);
-
- if (currency_symbol == NULL)
- goto end_error; /* ENOMEM. */
-
- /* value itself */
- value = va_arg(ap, double);
-
- /* detect sign */
- if (value < 0) {
- flags |= IS_NEGATIVE;
- value = -value;
- }
-
- /* fill left_prec with amount of padding chars */
- if (left_prec >= 0) {
- pad_size = __calc_left_pad((flags ^ IS_NEGATIVE),
- currency_symbol) -
- __calc_left_pad(flags, currency_symbol);
- if (pad_size < 0)
- pad_size = 0;
- }
-
- asciivalue = __format_grouped_double(value, &flags,
- left_prec, right_prec, pad_char);
- if (asciivalue == NULL)
- goto end_error; /* errno already set */
- /* to ENOMEM by malloc() */
-
- /* set some variables for later use */
- __setup_vars(flags, &cs_precedes, &sep_by_space,
- &sign_posn, &signstr);
-
- /*
- * Description of some LC_MONETARY's values:
- *
- * p_cs_precedes & n_cs_precedes
- *
- * = 1 - $currency_symbol precedes the value
- * for a monetary quantity with a non-negative value
- * = 0 - symbol succeeds the value
- *
- * p_sep_by_space & n_sep_by_space
- *
- * = 0 - no space separates $currency_symbol
- * from the value for a monetary quantity with a
- * non-negative value
- * = 1 - space separates the symbol from the value
- * = 2 - space separates the symbol and the sign string,
- * if adjacent.
- *
- * p_sign_posn & n_sign_posn
- *
- * = 0 - parentheses enclose the quantity and the
- * $currency_symbol
- * = 1 - the sign string precedes the quantity and the
- * $currency_symbol
- * = 2 - the sign string succeeds the quantity and the
- * $currency_symbol
- * = 3 - the sign string precedes the $currency_symbol
- * = 4 - the sign string succeeds the $currency_symbol
- *
- */
-
- tmpptr = dst;
-
- while (pad_size-- > 0)
- PRINT(' ');
-
- if (sign_posn == 0 && (flags & IS_NEGATIVE))
- PRINT('(');
-
- if (cs_precedes == 1) {
- if (sign_posn == 1 || sign_posn == 3) {
- PRINTS(signstr);
- if (sep_by_space == 2) /* XXX: ? */
- PRINT(' ');
- }
-
- if (!(flags & SUPRESS_CURR_SYMBOL)) {
- PRINTS(currency_symbol);
-
- if (sign_posn == 4) {
- if (sep_by_space == 2)
- PRINT(space_char);
- PRINTS(signstr);
- if (sep_by_space == 1)
- PRINT(' ');
- } else if (sep_by_space == 1)
- PRINT(space_char);
- }
- } else if (sign_posn == 1)
- PRINTS(signstr);
-
- PRINTS(asciivalue);
-
- if (cs_precedes == 0) {
- if (sign_posn == 3) {
- if (sep_by_space == 1)
- PRINT(' ');
- PRINTS(signstr);
- }
-
- if (!(flags & SUPRESS_CURR_SYMBOL)) {
- if ((sign_posn == 3 && sep_by_space == 2)
- || (sep_by_space == 1
- && (sign_posn == 0
- || sign_posn == 1
- || sign_posn == 2
- || sign_posn == 4)))
- PRINT(space_char);
- PRINTS(currency_symbol); /* XXX: len */
- if (sign_posn == 4) {
- if (sep_by_space == 2)
- PRINT(' ');
- PRINTS(signstr);
- }
- }
- }
-
- if (sign_posn == 2) {
- if (sep_by_space == 2)
- PRINT(' ');
- PRINTS(signstr);
- }
-
- if (sign_posn == 0 && (flags & IS_NEGATIVE))
- PRINT(')');
-
- if (dst - tmpptr < width) {
- if (flags & LEFT_JUSTIFY) {
- while (dst - tmpptr < width)
- PRINT(' ');
- } else {
- pad_size = dst-tmpptr;
- memmove(tmpptr + width-pad_size, tmpptr,
- pad_size);
- memset(tmpptr, ' ', width-pad_size);
- dst += width-pad_size;
- }
- }
- }
-
- PRINT('\0');
- va_end(ap);
- free(asciivalue);
- free(currency_symbol);
- return (dst - s - 1); /* return size of put data except trailing '\0' */
-
-e2big_error:
- errno = E2BIG;
- goto end_error;
-
-format_error:
- errno = EINVAL;
-
-end_error:
- sverrno = errno;
- if (asciivalue != NULL)
- free(asciivalue);
- if (currency_symbol != NULL)
- free(currency_symbol);
- errno = sverrno;
- va_end(ap);
- return (-1);
-}
-
-static void
-__setup_vars(int flags, char *cs_precedes, char *sep_by_space,
- char *sign_posn, char **signstr) {
-
- struct lconv *lc = localeconv();
-
- if ((flags & IS_NEGATIVE) && (flags & USE_INTL_CURRENCY)) {
- *cs_precedes = lc->int_n_cs_precedes;
- *sep_by_space = lc->int_n_sep_by_space;
- *sign_posn = (flags & PARENTH_POSN) ? 0 : lc->int_n_sign_posn;
- *signstr = (lc->negative_sign == '\0') ? "-"
- : lc->negative_sign;
- } else if (flags & USE_INTL_CURRENCY) {
- *cs_precedes = lc->int_p_cs_precedes;
- *sep_by_space = lc->int_p_sep_by_space;
- *sign_posn = (flags & PARENTH_POSN) ? 0 : lc->int_p_sign_posn;
- *signstr = lc->positive_sign;
- } else if (flags & IS_NEGATIVE) {
- *cs_precedes = lc->n_cs_precedes;
- *sep_by_space = lc->n_sep_by_space;
- *sign_posn = (flags & PARENTH_POSN) ? 0 : lc->n_sign_posn;
- *signstr = (lc->negative_sign == '\0') ? "-"
- : lc->negative_sign;
- } else {
- *cs_precedes = lc->p_cs_precedes;
- *sep_by_space = lc->p_sep_by_space;
- *sign_posn = (flags & PARENTH_POSN) ? 0 : lc->p_sign_posn;
- *signstr = lc->positive_sign;
- }
-
- /* Set defult values for unspecified information. */
- if (*cs_precedes != 0)
- *cs_precedes = 1;
- if (*sep_by_space == CHAR_MAX)
- *sep_by_space = 0;
- if (*sign_posn == CHAR_MAX)
- *sign_posn = 0;
-}
-
-static int
-__calc_left_pad(int flags, char *cur_symb) {
-
- char cs_precedes, sep_by_space, sign_posn, *signstr;
- int left_chars = 0;
-
- __setup_vars(flags, &cs_precedes, &sep_by_space, &sign_posn, &signstr);
-
- if (cs_precedes != 0) {
- left_chars += strlen(cur_symb);
- if (sep_by_space != 0)
- left_chars++;
- }
-
- switch (sign_posn) {
- case 1:
- left_chars += strlen(signstr);
- break;
- case 3:
- case 4:
- if (cs_precedes != 0)
- left_chars += strlen(signstr);
- }
- return (left_chars);
-}
-
-static int
-get_groups(int size, char *grouping) {
-
- int chars = 0;
-
- if (*grouping == CHAR_MAX || *grouping <= 0) /* no grouping ? */
- return (0);
-
- while (size > (int)*grouping) {
- chars++;
- size -= (int)*grouping++;
- /* no more grouping ? */
- if (*grouping == CHAR_MAX)
- break;
- /* rest grouping with same value ? */
- if (*grouping == 0) {
- chars += (size - 1) / *(grouping - 1);
- break;
- }
- }
- return (chars);
-}
-
-/* convert double to ASCII */
-static char *
-__format_grouped_double(double value, int *flags,
- int left_prec, int right_prec, int pad_char) {
-
- char *rslt;
- char *avalue;
- int avalue_size;
- char fmt[32];
-
- size_t bufsize;
- char *bufend;
-
- int padded;
-
- struct lconv *lc = localeconv();
- char *grouping;
- char decimal_point;
- char thousands_sep;
-
- int groups = 0;
-
- grouping = lc->mon_grouping;
- decimal_point = *lc->mon_decimal_point;
- if (decimal_point == '\0')
- decimal_point = *lc->decimal_point;
- thousands_sep = *lc->mon_thousands_sep;
- if (thousands_sep == '\0')
- thousands_sep = *lc->thousands_sep;
-
- /* fill left_prec with default value */
- if (left_prec == -1)
- left_prec = 0;
-
- /* fill right_prec with default value */
- if (right_prec == -1) {
- if (*flags & USE_INTL_CURRENCY)
- right_prec = lc->int_frac_digits;
- else
- right_prec = lc->frac_digits;
-
- if (right_prec == CHAR_MAX) /* POSIX locale ? */
- right_prec = 2;
- }
-
- if (*flags & NEED_GROUPING)
- left_prec += get_groups(left_prec, grouping);
-
- /* convert to string */
- snprintf(fmt, sizeof(fmt), "%%%d.%df", left_prec + right_prec + 1,
- right_prec);
- avalue_size = asprintf(&avalue, fmt, value);
- if (avalue_size < 0)
- return (NULL);
-
- /* make sure that we've enough space for result string */
- bufsize = strlen(avalue)*2+1;
- rslt = malloc(bufsize);
- if (rslt == NULL) {
- free(avalue);
- return (NULL);
- }
- memset(rslt, 0, bufsize);
- bufend = rslt + bufsize - 1; /* reserve space for trailing '\0' */
-
- /* skip spaces at beggining */
- padded = 0;
- while (avalue[padded] == ' ') {
- padded++;
- avalue_size--;
- }
-
- if (right_prec > 0) {
- bufend -= right_prec;
- memcpy(bufend, avalue + avalue_size+padded-right_prec,
- right_prec);
- *--bufend = decimal_point;
- avalue_size -= (right_prec + 1);
- }
-
- if ((*flags & NEED_GROUPING) &&
- thousands_sep != '\0' && /* XXX: need investigation */
- *grouping != CHAR_MAX &&
- *grouping > 0) {
- while (avalue_size > (int)*grouping) {
- GRPCPY(*grouping);
- GRPSEP;
- grouping++;
-
- /* no more grouping ? */
- if (*grouping == CHAR_MAX)
- break;
-
- /* rest grouping with same value ? */
- if (*grouping == 0) {
- grouping--;
- while (avalue_size > *grouping) {
- GRPCPY(*grouping);
- GRPSEP;
- }
- }
- }
- if (avalue_size != 0)
- GRPCPY(avalue_size);
- padded -= groups;
-
- } else {
- bufend -= avalue_size;
- memcpy(bufend, avalue+padded, avalue_size);
- if (right_prec == 0)
- padded--; /* decrease assumed $decimal_point */
- }
-
- /* do padding with pad_char */
- if (padded > 0) {
- bufend -= padded;
- memset(bufend, pad_char, padded);
- }
-
- bufsize = bufsize - (bufend - rslt) + 1;
- memmove(rslt, bufend, bufsize);
- free(avalue);
- return (rslt);
-}
projects / apple / libc.git / blobdiff