#include <sys/cdefs.h>
#if defined(LIBC_SCCS) && !defined(lint)
#if 0
__FBSDID("$FreeBSD: src/lib/libc/stdlib/strfmon.c,v 1.14 2003/03/20 08:18:55 ache Exp $");
#else
__RCSID("$NetBSD: strfmon.c,v 1.7 2009/01/30 23:46:03 lukem Exp $");
#endif
#endif
#if defined(__NetBSD__)
#include "namespace.h"
#include <monetary.h>
#endif
#include "xlocale_private.h"
#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>
#include <stddef.h>
#define NEED_GROUPING 0x01
#define SIGN_POSN_USED 0x02
#define LOCALE_POSN 0x04
#define PARENTH_POSN 0x08
#define SUPRESS_CURR_SYMBOL 0x10
#define LEFT_JUSTIFY 0x20
#define USE_INTL_CURRENCY 0x40
#define IS_NEGATIVE 0x80
#define PRINT(CH) do { \
if (dst >= s + maxsize) \
goto e2big_error; \
*dst++ = CH; \
} while ( 0)
#define PRINTS(STR) do { \
const char *tmps = STR; \
while (*tmps != '\0') \
PRINT(*tmps++); \
} while ( 0)
#define GET_NUMBER(VAR,LOC) do { \
VAR = 0; \
while (isdigit_l((unsigned char)*fmt, (LOC))) { \
VAR *= 10; \
VAR += *fmt - '0'; \
if (VAR > 0x00ffffff) \
goto e2big_error; \
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 *, const char **, struct lconv *);
static int __calc_left_pad(int, char *, struct lconv *);
static char *__format_grouped_double(double, int *, int, int, int, struct lconv *, locale_t);
static ssize_t
_strfmon(char * __restrict s, size_t maxsize, locale_t loc, const char * __restrict format, va_list ap)
{
char *dst;
const char *fmt;
struct lconv *lc;
char *asciivalue;
int flags;
int pad_char;
int pad_size;
int width;
int left_prec;
int right_prec;
double value;
char space_char = ' ';
char cs_precedes,
sep_by_space,
sign_posn,
*currency_symbol;
const char *signstr;
char *tmpptr;
int sverrno;
lc = localeconv_l(loc);
dst = s;
fmt = format;
asciivalue = NULL;
currency_symbol = NULL;
pad_size = 0;
while (*fmt) {
if (*fmt != '%')
goto literal;
if (*(fmt+1) == '%') {
fmt++;
literal:
PRINT(*fmt++);
continue;
}
flags = (NEED_GROUPING|LOCALE_POSN);
pad_char = ' ';
left_prec = -1;
right_prec = -1;
width = -1;
value = 0;
while ( 1) {
switch (*++fmt) {
case '=':
pad_char = *++fmt;
if (pad_char == '\0')
goto format_error;
continue;
case '^':
flags &= ~(NEED_GROUPING);
continue;
case '+':
if (flags & SIGN_POSN_USED)
goto format_error;
flags |= (SIGN_POSN_USED|LOCALE_POSN);
continue;
case '(':
if (flags & SIGN_POSN_USED)
goto format_error;
flags |= (SIGN_POSN_USED|PARENTH_POSN);
continue;
case '!':
flags |= SUPRESS_CURR_SYMBOL;
continue;
case '-':
flags |= LEFT_JUSTIFY;
continue;
default:
break;
}
break;
}
if (isdigit_l((unsigned char)*fmt, loc)) {
ptrdiff_t d = dst - s;
GET_NUMBER(width, loc);
if ((size_t)(d + width) >= maxsize)
goto e2big_error;
}
if (*fmt == '#') {
if (!isdigit_l((unsigned char)*++fmt, loc))
goto format_error;
GET_NUMBER(left_prec, loc);
}
if (*fmt == '.') {
if (!isdigit_l((unsigned char)*++fmt, loc))
goto format_error;
GET_NUMBER(right_prec, loc);
}
switch (*fmt++) {
case 'i':
flags |= USE_INTL_CURRENCY;
break;
case 'n':
flags &= ~(USE_INTL_CURRENCY);
break;
default:
goto format_error;
}
if (currency_symbol)
free(currency_symbol);
if (flags & USE_INTL_CURRENCY) {
currency_symbol = strdup(lc->int_curr_symbol);
if (currency_symbol != NULL) {
space_char = *(currency_symbol+3);
currency_symbol[3] = '\0';
}
} else
currency_symbol = strdup(lc->currency_symbol);
if (currency_symbol == NULL)
goto end_error;
value = va_arg(ap, double);
if (value < 0) {
flags |= IS_NEGATIVE;
value = -value;
}
if (left_prec >= 0) {
pad_size = __calc_left_pad((flags ^ IS_NEGATIVE),
currency_symbol, lc) -
__calc_left_pad(flags, currency_symbol, lc);
if (pad_size < 0)
pad_size = 0;
}
asciivalue = __format_grouped_double(value, &flags,
left_prec, right_prec, pad_char, lc, loc);
if (asciivalue == NULL)
goto end_error;
__setup_vars(flags, &cs_precedes, &sep_by_space,
&sign_posn, &signstr, lc);
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)
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);
if (sep_by_space == 2)
PRINT(' ');
}
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);
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) {
if (flags & IS_NEGATIVE)
PRINT(')');
else if (left_prec >= 0)
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,
(size_t) pad_size);
memset(tmpptr, ' ', (size_t) width-pad_size);
dst += width-pad_size;
}
}
}
PRINT('\0');
free(asciivalue);
free(currency_symbol);
return (dst - s - 1);
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;
return (-1);
}
static void
__setup_vars(int flags, char *cs_precedes, char *sep_by_space,
char *sign_posn, const char **signstr, struct lconv *lc) {
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;
}
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, struct lconv *lc) {
char cs_precedes, sep_by_space, sign_posn;
const char *signstr;
int left_chars = 0;
__setup_vars(flags, &cs_precedes, &sep_by_space, &sign_posn, &signstr, lc);
if (cs_precedes != 0) {
left_chars += strlen(cur_symb);
if (sep_by_space != 0)
left_chars++;
}
switch (sign_posn) {
case 0:
if (flags & IS_NEGATIVE)
left_chars++;
break;
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, const char *grouping) {
int chars = 0;
if (*grouping == CHAR_MAX || *grouping <= 0)
return (0);
while (size > (int)*grouping) {
chars++;
size -= (int)*grouping++;
if (*grouping == CHAR_MAX)
break;
if (*grouping == 0) {
chars += (size - 1) / *(grouping - 1);
break;
}
}
return (chars);
}
__private_extern__ const char *__fix_nogrouping(const char *);
static char *
__format_grouped_double(double value, int *flags,
int left_prec, int right_prec, int pad_char, struct lconv *lc, locale_t loc) {
char *rslt;
char *avalue;
int avalue_size;
char fmt[32];
size_t bufsize;
char *bufend;
int padded;
const char *grouping;
char decimal_point;
char thousands_sep;
int groups = 0;
grouping = __fix_nogrouping(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;
if (left_prec == -1)
left_prec = 0;
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)
right_prec = 2;
}
if (*flags & NEED_GROUPING)
left_prec += get_groups(left_prec, grouping);
snprintf_l(fmt, sizeof(fmt), loc, "%%%d.%df", left_prec + right_prec + 1,
right_prec);
avalue_size = asprintf_l(&avalue, loc, fmt, value);
if (avalue_size < 0)
return (NULL);
bufsize = strlen(avalue)*2+1;
rslt = malloc(bufsize);
if (rslt == NULL) {
free(avalue);
return (NULL);
}
memset(rslt, 0, bufsize);
bufend = rslt + bufsize - 1;
padded = 0;
while (avalue[padded] == ' ') {
padded++;
avalue_size--;
}
if (right_prec > 0) {
bufend -= right_prec;
memcpy(bufend, avalue + avalue_size+padded-right_prec,
(size_t) right_prec);
*--bufend = decimal_point;
avalue_size -= (right_prec + 1);
}
if ((*flags & NEED_GROUPING) &&
thousands_sep != '\0' &&
*grouping != CHAR_MAX &&
*grouping > 0) {
while (avalue_size > (int)*grouping) {
GRPCPY(*grouping);
GRPSEP;
grouping++;
if (*grouping == CHAR_MAX)
break;
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, (size_t) avalue_size);
if (right_prec == 0)
padded--;
}
if (padded > 0) {
bufend -= padded;
memset(bufend, pad_char, (size_t) padded);
}
bufsize = bufsize - (bufend - rslt) + 1;
memmove(rslt, bufend, bufsize);
free(avalue);
return (rslt);
}
ssize_t
strfmon(char * __restrict s, size_t maxsize, const char * __restrict format,
...)
{
ssize_t ret;
va_list ap;
va_start(ap, format);
ret = _strfmon(s, maxsize, __current_locale(), format, ap);
va_end(ap);
return ret;
}
ssize_t
strfmon_l(char * __restrict s, size_t maxsize, locale_t loc,
const char * __restrict format, ...)
{
ssize_t ret;
va_list ap;
NORMALIZE_LOCALE(loc);
va_start(ap, format);
ret = _strfmon(s, maxsize, loc, format, ap);
va_end(ap);
return ret;
}