| /* |
| * Copyright (c) 2008-2012 Stefan Krah. 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 "mpdecimal.h" |
| #include <stdio.h> |
| #include <stdlib.h> |
| #include <string.h> |
| #include <ctype.h> |
| #include <limits.h> |
| #include <assert.h> |
| #include <errno.h> |
| #include <locale.h> |
| #include "bits.h" |
| #include "constants.h" |
| #include "memory.h" |
| #include "typearith.h" |
| #include "io.h" |
| |
| |
| /* This file contains functions for decimal <-> string conversions, including |
| PEP-3101 formatting for numeric types. */ |
| |
| |
| /* |
| * Work around the behavior of tolower() and strcasecmp() in certain |
| * locales. For example, in tr_TR.utf8: |
| * |
| * tolower((unsigned char)'I') == 'I' |
| * |
| * u is the exact uppercase version of l; n is strlen(l) or strlen(l)+1 |
| */ |
| static inline int |
| _mpd_strneq(const char *s, const char *l, const char *u, size_t n) |
| { |
| while (--n != SIZE_MAX) { |
| if (*s != *l && *s != *u) { |
| return 0; |
| } |
| s++; u++; l++; |
| } |
| |
| return 1; |
| } |
| |
| static mpd_ssize_t |
| strtoexp(const char *s) |
| { |
| char *end; |
| mpd_ssize_t retval; |
| |
| errno = 0; |
| retval = mpd_strtossize(s, &end, 10); |
| if (errno == 0 && !(*s != '\0' && *end == '\0')) |
| errno = EINVAL; |
| |
| return retval; |
| } |
| |
| /* |
| * Scan 'len' words. The most significant word contains 'r' digits, |
| * the remaining words are full words. Skip dpoint. The string 's' must |
| * consist of digits and an optional single decimal point at 'dpoint'. |
| */ |
| static void |
| string_to_coeff(mpd_uint_t *data, const char *s, const char *dpoint, int r, |
| size_t len) |
| { |
| int j; |
| |
| if (r > 0) { |
| data[--len] = 0; |
| for (j = 0; j < r; j++, s++) { |
| if (s == dpoint) s++; |
| data[len] = 10 * data[len] + (*s - '0'); |
| } |
| } |
| |
| while (--len != SIZE_MAX) { |
| data[len] = 0; |
| for (j = 0; j < MPD_RDIGITS; j++, s++) { |
| if (s == dpoint) s++; |
| data[len] = 10 * data[len] + (*s - '0'); |
| } |
| } |
| } |
| |
| /* |
| * Partially verify a numeric string of the form: |
| * |
| * [cdigits][.][cdigits][eE][+-][edigits] |
| * |
| * If successful, return a pointer to the location of the first |
| * relevant coefficient digit. This digit is either non-zero or |
| * part of one of the following patterns: |
| * |
| * ["0\x00", "0.\x00", "0.E", "0.e", "0E", "0e"] |
| * |
| * The locations of a single optional dot or indicator are stored |
| * in 'dpoint' and 'exp'. |
| * |
| * The end of the string is stored in 'end'. If an indicator [eE] |
| * occurs without trailing [edigits], the condition is caught |
| * later by strtoexp(). |
| */ |
| static const char * |
| scan_dpoint_exp(const char *s, const char **dpoint, const char **exp, |
| const char **end) |
| { |
| const char *coeff = NULL; |
| |
| *dpoint = NULL; |
| *exp = NULL; |
| for (; *s != '\0'; s++) { |
| switch (*s) { |
| case '.': |
| if (*dpoint != NULL || *exp != NULL) |
| return NULL; |
| *dpoint = s; |
| break; |
| case 'E': case 'e': |
| if (*exp != NULL) |
| return NULL; |
| *exp = s; |
| if (*(s+1) == '+' || *(s+1) == '-') |
| s++; |
| break; |
| default: |
| if (!isdigit((uchar)*s)) |
| return NULL; |
| if (coeff == NULL && *exp == NULL) { |
| if (*s == '0') { |
| if (!isdigit((uchar)*(s+1))) |
| if (!(*(s+1) == '.' && |
| isdigit((uchar)*(s+2)))) |
| coeff = s; |
| } |
| else { |
| coeff = s; |
| } |
| } |
| break; |
| |
| } |
| } |
| |
| *end = s; |
| return coeff; |
| } |
| |
| /* scan the payload of a NaN */ |
| static const char * |
| scan_payload(const char *s, const char **end) |
| { |
| const char *coeff; |
| |
| while (*s == '0') |
| s++; |
| coeff = s; |
| |
| while (isdigit((uchar)*s)) |
| s++; |
| *end = s; |
| |
| return (*s == '\0') ? coeff : NULL; |
| } |
| |
| /* convert a character string to a decimal */ |
| void |
| mpd_qset_string(mpd_t *dec, const char *s, const mpd_context_t *ctx, |
| uint32_t *status) |
| { |
| mpd_ssize_t q, r, len; |
| const char *coeff, *end; |
| const char *dpoint = NULL, *exp = NULL; |
| size_t digits; |
| uint8_t sign = MPD_POS; |
| |
| mpd_set_flags(dec, 0); |
| dec->len = 0; |
| dec->exp = 0; |
| |
| /* sign */ |
| if (*s == '+') { |
| s++; |
| } |
| else if (*s == '-') { |
| mpd_set_negative(dec); |
| sign = MPD_NEG; |
| s++; |
| } |
| |
| if (_mpd_strneq(s, "nan", "NAN", 3)) { /* NaN */ |
| s += 3; |
| mpd_setspecial(dec, sign, MPD_NAN); |
| if (*s == '\0') |
| return; |
| /* validate payload: digits only */ |
| if ((coeff = scan_payload(s, &end)) == NULL) |
| goto conversion_error; |
| /* payload consists entirely of zeros */ |
| if (*coeff == '\0') |
| return; |
| digits = end - coeff; |
| /* prec >= 1, clamp is 0 or 1 */ |
| if (digits > (size_t)(ctx->prec-ctx->clamp)) |
| goto conversion_error; |
| } /* sNaN */ |
| else if (_mpd_strneq(s, "snan", "SNAN", 4)) { |
| s += 4; |
| mpd_setspecial(dec, sign, MPD_SNAN); |
| if (*s == '\0') |
| return; |
| /* validate payload: digits only */ |
| if ((coeff = scan_payload(s, &end)) == NULL) |
| goto conversion_error; |
| /* payload consists entirely of zeros */ |
| if (*coeff == '\0') |
| return; |
| digits = end - coeff; |
| if (digits > (size_t)(ctx->prec-ctx->clamp)) |
| goto conversion_error; |
| } |
| else if (_mpd_strneq(s, "inf", "INF", 3)) { |
| s += 3; |
| if (*s == '\0' || _mpd_strneq(s, "inity", "INITY", 6)) { |
| /* numeric-value: infinity */ |
| mpd_setspecial(dec, sign, MPD_INF); |
| return; |
| } |
| goto conversion_error; |
| } |
| else { |
| /* scan for start of coefficient, decimal point, indicator, end */ |
| if ((coeff = scan_dpoint_exp(s, &dpoint, &exp, &end)) == NULL) |
| goto conversion_error; |
| |
| /* numeric-value: [exponent-part] */ |
| if (exp) { |
| /* exponent-part */ |
| end = exp; exp++; |
| dec->exp = strtoexp(exp); |
| if (errno) { |
| if (!(errno == ERANGE && |
| (dec->exp == MPD_SSIZE_MAX || |
| dec->exp == MPD_SSIZE_MIN))) |
| goto conversion_error; |
| } |
| } |
| |
| digits = end - coeff; |
| if (dpoint) { |
| size_t fracdigits = end-dpoint-1; |
| if (dpoint > coeff) digits--; |
| |
| if (fracdigits > MPD_MAX_PREC) { |
| goto conversion_error; |
| } |
| if (dec->exp < MPD_SSIZE_MIN+(mpd_ssize_t)fracdigits) { |
| dec->exp = MPD_SSIZE_MIN; |
| } |
| else { |
| dec->exp -= (mpd_ssize_t)fracdigits; |
| } |
| } |
| if (digits > MPD_MAX_PREC) { |
| goto conversion_error; |
| } |
| if (dec->exp > MPD_EXP_INF) { |
| dec->exp = MPD_EXP_INF; |
| } |
| if (dec->exp == MPD_SSIZE_MIN) { |
| dec->exp = MPD_SSIZE_MIN+1; |
| } |
| } |
| |
| _mpd_idiv_word(&q, &r, (mpd_ssize_t)digits, MPD_RDIGITS); |
| |
| len = (r == 0) ? q : q+1; |
| if (len == 0) { |
| goto conversion_error; /* GCOV_NOT_REACHED */ |
| } |
| if (!mpd_qresize(dec, len, status)) { |
| mpd_seterror(dec, MPD_Malloc_error, status); |
| return; |
| } |
| dec->len = len; |
| |
| string_to_coeff(dec->data, coeff, dpoint, (int)r, len); |
| |
| mpd_setdigits(dec); |
| mpd_qfinalize(dec, ctx, status); |
| return; |
| |
| conversion_error: |
| /* standard wants a positive NaN */ |
| mpd_seterror(dec, MPD_Conversion_syntax, status); |
| } |
| |
| /* Print word x with n decimal digits to string s. dot is either NULL |
| or the location of a decimal point. */ |
| #define EXTRACT_DIGIT(s, x, d, dot) \ |
| if (s == dot) *s++ = '.'; *s++ = '0' + (char)(x / d); x %= d |
| static inline char * |
| word_to_string(char *s, mpd_uint_t x, int n, char *dot) |
| { |
| switch(n) { |
| #ifdef CONFIG_64 |
| case 20: EXTRACT_DIGIT(s, x, 10000000000000000000ULL, dot); /* GCOV_NOT_REACHED */ |
| case 19: EXTRACT_DIGIT(s, x, 1000000000000000000ULL, dot); |
| case 18: EXTRACT_DIGIT(s, x, 100000000000000000ULL, dot); |
| case 17: EXTRACT_DIGIT(s, x, 10000000000000000ULL, dot); |
| case 16: EXTRACT_DIGIT(s, x, 1000000000000000ULL, dot); |
| case 15: EXTRACT_DIGIT(s, x, 100000000000000ULL, dot); |
| case 14: EXTRACT_DIGIT(s, x, 10000000000000ULL, dot); |
| case 13: EXTRACT_DIGIT(s, x, 1000000000000ULL, dot); |
| case 12: EXTRACT_DIGIT(s, x, 100000000000ULL, dot); |
| case 11: EXTRACT_DIGIT(s, x, 10000000000ULL, dot); |
| #endif |
| case 10: EXTRACT_DIGIT(s, x, 1000000000UL, dot); |
| case 9: EXTRACT_DIGIT(s, x, 100000000UL, dot); |
| case 8: EXTRACT_DIGIT(s, x, 10000000UL, dot); |
| case 7: EXTRACT_DIGIT(s, x, 1000000UL, dot); |
| case 6: EXTRACT_DIGIT(s, x, 100000UL, dot); |
| case 5: EXTRACT_DIGIT(s, x, 10000UL, dot); |
| case 4: EXTRACT_DIGIT(s, x, 1000UL, dot); |
| case 3: EXTRACT_DIGIT(s, x, 100UL, dot); |
| case 2: EXTRACT_DIGIT(s, x, 10UL, dot); |
| default: if (s == dot) *s++ = '.'; *s++ = '0' + (char)x; |
| } |
| |
| *s = '\0'; |
| return s; |
| } |
| |
| /* Print exponent x to string s. Undefined for MPD_SSIZE_MIN. */ |
| static inline char * |
| exp_to_string(char *s, mpd_ssize_t x) |
| { |
| char sign = '+'; |
| |
| if (x < 0) { |
| sign = '-'; |
| x = -x; |
| } |
| *s++ = sign; |
| |
| return word_to_string(s, x, mpd_word_digits(x), NULL); |
| } |
| |
| /* Print the coefficient of dec to string s. len(dec) > 0. */ |
| static inline char * |
| coeff_to_string(char *s, const mpd_t *dec) |
| { |
| mpd_uint_t x; |
| mpd_ssize_t i; |
| |
| /* most significant word */ |
| x = mpd_msword(dec); |
| s = word_to_string(s, x, mpd_word_digits(x), NULL); |
| |
| /* remaining full words */ |
| for (i=dec->len-2; i >= 0; --i) { |
| x = dec->data[i]; |
| s = word_to_string(s, x, MPD_RDIGITS, NULL); |
| } |
| |
| return s; |
| } |
| |
| /* Print the coefficient of dec to string s. len(dec) > 0. dot is either |
| NULL or a pointer to the location of a decimal point. */ |
| static inline char * |
| coeff_to_string_dot(char *s, char *dot, const mpd_t *dec) |
| { |
| mpd_uint_t x; |
| mpd_ssize_t i; |
| |
| /* most significant word */ |
| x = mpd_msword(dec); |
| s = word_to_string(s, x, mpd_word_digits(x), dot); |
| |
| /* remaining full words */ |
| for (i=dec->len-2; i >= 0; --i) { |
| x = dec->data[i]; |
| s = word_to_string(s, x, MPD_RDIGITS, dot); |
| } |
| |
| return s; |
| } |
| |
| /* Format type */ |
| #define MPD_FMT_LOWER 0x00000000 |
| #define MPD_FMT_UPPER 0x00000001 |
| #define MPD_FMT_TOSCI 0x00000002 |
| #define MPD_FMT_TOENG 0x00000004 |
| #define MPD_FMT_EXP 0x00000008 |
| #define MPD_FMT_FIXED 0x00000010 |
| #define MPD_FMT_PERCENT 0x00000020 |
| #define MPD_FMT_SIGN_SPACE 0x00000040 |
| #define MPD_FMT_SIGN_PLUS 0x00000080 |
| |
| /* Default place of the decimal point for MPD_FMT_TOSCI, MPD_FMT_EXP */ |
| #define MPD_DEFAULT_DOTPLACE 1 |
| |
| /* |
| * Set *result to the string representation of a decimal. Return the length |
| * of *result, not including the terminating '\0' character. |
| * |
| * Formatting is done according to 'flags'. A return value of -1 with *result |
| * set to NULL indicates MPD_Malloc_error. |
| * |
| * 'dplace' is the default place of the decimal point. It is always set to |
| * MPD_DEFAULT_DOTPLACE except for zeros in combination with MPD_FMT_EXP. |
| */ |
| static mpd_ssize_t |
| _mpd_to_string(char **result, const mpd_t *dec, int flags, mpd_ssize_t dplace) |
| { |
| char *decstring = NULL, *cp = NULL; |
| mpd_ssize_t ldigits; |
| mpd_ssize_t mem = 0, k; |
| |
| if (mpd_isspecial(dec)) { |
| |
| mem = sizeof "-Infinity"; |
| if (mpd_isnan(dec) && dec->len > 0) { |
| /* diagnostic code */ |
| mem += dec->digits; |
| } |
| cp = decstring = mpd_alloc(mem, sizeof *decstring); |
| if (cp == NULL) { |
| *result = NULL; |
| return -1; |
| } |
| |
| if (mpd_isnegative(dec)) { |
| *cp++ = '-'; |
| } |
| else if (flags&MPD_FMT_SIGN_SPACE) { |
| *cp++ = ' '; |
| } |
| else if (flags&MPD_FMT_SIGN_PLUS) { |
| *cp++ = '+'; |
| } |
| |
| if (mpd_isnan(dec)) { |
| if (mpd_isqnan(dec)) { |
| strcpy(cp, "NaN"); |
| cp += 3; |
| } |
| else { |
| strcpy(cp, "sNaN"); |
| cp += 4; |
| } |
| if (dec->len > 0) { /* diagnostic code */ |
| cp = coeff_to_string(cp, dec); |
| } |
| } |
| else if (mpd_isinfinite(dec)) { |
| strcpy(cp, "Infinity"); |
| cp += 8; |
| } |
| else { /* debug */ |
| abort(); /* GCOV_NOT_REACHED */ |
| } |
| } |
| else { |
| assert(dec->len > 0); |
| |
| /* |
| * For easier manipulation of the decimal point's location |
| * and the exponent that is finally printed, the number is |
| * rescaled to a virtual representation with exp = 0. Here |
| * ldigits denotes the number of decimal digits to the left |
| * of the decimal point and remains constant once initialized. |
| * |
| * dplace is the location of the decimal point relative to |
| * the start of the coefficient. Note that 3) always holds |
| * when dplace is shifted. |
| * |
| * 1) ldigits := dec->digits - dec->exp |
| * 2) dplace := ldigits (initially) |
| * 3) exp := ldigits - dplace (initially exp = 0) |
| * |
| * 0.00000_.____._____000000. |
| * ^ ^ ^ ^ |
| * | | | | |
| * | | | `- dplace >= digits |
| * | | `- dplace in the middle of the coefficient |
| * | ` dplace = 1 (after the first coefficient digit) |
| * `- dplace <= 0 |
| */ |
| |
| ldigits = dec->digits + dec->exp; |
| |
| if (flags&MPD_FMT_EXP) { |
| ; |
| } |
| else if (flags&MPD_FMT_FIXED || (dec->exp <= 0 && ldigits > -6)) { |
| /* MPD_FMT_FIXED: always use fixed point notation. |
| * MPD_FMT_TOSCI, MPD_FMT_TOENG: for a certain range, |
| * override exponent notation. */ |
| dplace = ldigits; |
| } |
| else if (flags&MPD_FMT_TOENG) { |
| if (mpd_iszero(dec)) { |
| /* If the exponent is divisible by three, |
| * dplace = 1. Otherwise, move dplace one |
| * or two places to the left. */ |
| dplace = -1 + mod_mpd_ssize_t(dec->exp+2, 3); |
| } |
| else { /* ldigits-1 is the adjusted exponent, which |
| * should be divisible by three. If not, move |
| * dplace one or two places to the right. */ |
| dplace += mod_mpd_ssize_t(ldigits-1, 3); |
| } |
| } |
| |
| /* |
| * Basic space requirements: |
| * |
| * [-][.][coeffdigits][E][-][expdigits+1][%]['\0'] |
| * |
| * If the decimal point lies outside of the coefficient digits, |
| * space is adjusted accordingly. |
| */ |
| if (dplace <= 0) { |
| mem = -dplace + dec->digits + 2; |
| } |
| else if (dplace >= dec->digits) { |
| mem = dplace; |
| } |
| else { |
| mem = dec->digits; |
| } |
| mem += (MPD_EXPDIGITS+1+6); |
| |
| cp = decstring = mpd_alloc(mem, sizeof *decstring); |
| if (cp == NULL) { |
| *result = NULL; |
| return -1; |
| } |
| |
| |
| if (mpd_isnegative(dec)) { |
| *cp++ = '-'; |
| } |
| else if (flags&MPD_FMT_SIGN_SPACE) { |
| *cp++ = ' '; |
| } |
| else if (flags&MPD_FMT_SIGN_PLUS) { |
| *cp++ = '+'; |
| } |
| |
| if (dplace <= 0) { |
| /* space: -dplace+dec->digits+2 */ |
| *cp++ = '0'; |
| *cp++ = '.'; |
| for (k = 0; k < -dplace; k++) { |
| *cp++ = '0'; |
| } |
| cp = coeff_to_string(cp, dec); |
| } |
| else if (dplace >= dec->digits) { |
| /* space: dplace */ |
| cp = coeff_to_string(cp, dec); |
| for (k = 0; k < dplace-dec->digits; k++) { |
| *cp++ = '0'; |
| } |
| } |
| else { |
| /* space: dec->digits+1 */ |
| cp = coeff_to_string_dot(cp, cp+dplace, dec); |
| } |
| |
| /* |
| * Conditions for printing an exponent: |
| * |
| * MPD_FMT_TOSCI, MPD_FMT_TOENG: only if ldigits != dplace |
| * MPD_FMT_FIXED: never (ldigits == dplace) |
| * MPD_FMT_EXP: always |
| */ |
| if (ldigits != dplace || flags&MPD_FMT_EXP) { |
| /* space: expdigits+2 */ |
| *cp++ = (flags&MPD_FMT_UPPER) ? 'E' : 'e'; |
| cp = exp_to_string(cp, ldigits-dplace); |
| } |
| |
| if (flags&MPD_FMT_PERCENT) { |
| *cp++ = '%'; |
| } |
| } |
| |
| assert(cp < decstring+mem); |
| assert(cp-decstring < MPD_SSIZE_MAX); |
| |
| *cp = '\0'; |
| *result = decstring; |
| return (mpd_ssize_t)(cp-decstring); |
| } |
| |
| char * |
| mpd_to_sci(const mpd_t *dec, int fmt) |
| { |
| char *res; |
| int flags = MPD_FMT_TOSCI; |
| |
| flags |= fmt ? MPD_FMT_UPPER : MPD_FMT_LOWER; |
| (void)_mpd_to_string(&res, dec, flags, MPD_DEFAULT_DOTPLACE); |
| return res; |
| } |
| |
| char * |
| mpd_to_eng(const mpd_t *dec, int fmt) |
| { |
| char *res; |
| int flags = MPD_FMT_TOENG; |
| |
| flags |= fmt ? MPD_FMT_UPPER : MPD_FMT_LOWER; |
| (void)_mpd_to_string(&res, dec, flags, MPD_DEFAULT_DOTPLACE); |
| return res; |
| } |
| |
| mpd_ssize_t |
| mpd_to_sci_size(char **res, const mpd_t *dec, int fmt) |
| { |
| int flags = MPD_FMT_TOSCI; |
| |
| flags |= fmt ? MPD_FMT_UPPER : MPD_FMT_LOWER; |
| return _mpd_to_string(res, dec, flags, MPD_DEFAULT_DOTPLACE); |
| } |
| |
| mpd_ssize_t |
| mpd_to_eng_size(char **res, const mpd_t *dec, int fmt) |
| { |
| int flags = MPD_FMT_TOENG; |
| |
| flags |= fmt ? MPD_FMT_UPPER : MPD_FMT_LOWER; |
| return _mpd_to_string(res, dec, flags, MPD_DEFAULT_DOTPLACE); |
| } |
| |
| /* Copy a single UTF-8 char to dest. See: The Unicode Standard, version 5.2, |
| chapter 3.9: Well-formed UTF-8 byte sequences. */ |
| static int |
| _mpd_copy_utf8(char dest[5], const char *s) |
| { |
| const uchar *cp = (const uchar *)s; |
| uchar lb, ub; |
| int count, i; |
| |
| |
| if (*cp == 0) { |
| /* empty string */ |
| dest[0] = '\0'; |
| return 0; |
| } |
| else if (*cp <= 0x7f) { |
| /* ascii */ |
| dest[0] = *cp; |
| dest[1] = '\0'; |
| return 1; |
| } |
| else if (0xc2 <= *cp && *cp <= 0xdf) { |
| lb = 0x80; ub = 0xbf; |
| count = 2; |
| } |
| else if (*cp == 0xe0) { |
| lb = 0xa0; ub = 0xbf; |
| count = 3; |
| } |
| else if (*cp <= 0xec) { |
| lb = 0x80; ub = 0xbf; |
| count = 3; |
| } |
| else if (*cp == 0xed) { |
| lb = 0x80; ub = 0x9f; |
| count = 3; |
| } |
| else if (*cp <= 0xef) { |
| lb = 0x80; ub = 0xbf; |
| count = 3; |
| } |
| else if (*cp == 0xf0) { |
| lb = 0x90; ub = 0xbf; |
| count = 4; |
| } |
| else if (*cp <= 0xf3) { |
| lb = 0x80; ub = 0xbf; |
| count = 4; |
| } |
| else if (*cp == 0xf4) { |
| lb = 0x80; ub = 0x8f; |
| count = 4; |
| } |
| else { |
| /* invalid */ |
| goto error; |
| } |
| |
| dest[0] = *cp++; |
| if (*cp < lb || ub < *cp) { |
| goto error; |
| } |
| dest[1] = *cp++; |
| for (i = 2; i < count; i++) { |
| if (*cp < 0x80 || 0xbf < *cp) { |
| goto error; |
| } |
| dest[i] = *cp++; |
| } |
| dest[i] = '\0'; |
| |
| return count; |
| |
| error: |
| dest[0] = '\0'; |
| return -1; |
| } |
| |
| int |
| mpd_validate_lconv(mpd_spec_t *spec) |
| { |
| size_t n; |
| #if CHAR_MAX == SCHAR_MAX |
| const char *cp = spec->grouping; |
| while (*cp != '\0') { |
| if (*cp++ < 0) { |
| return -1; |
| } |
| } |
| #endif |
| n = strlen(spec->dot); |
| if (n == 0 || n > 4) { |
| return -1; |
| } |
| if (strlen(spec->sep) > 4) { |
| return -1; |
| } |
| |
| return 0; |
| } |
| |
| int |
| mpd_parse_fmt_str(mpd_spec_t *spec, const char *fmt, int caps) |
| { |
| char *cp = (char *)fmt; |
| int have_align = 0, n; |
| |
| /* defaults */ |
| spec->min_width = 0; |
| spec->prec = -1; |
| spec->type = caps ? 'G' : 'g'; |
| spec->align = '>'; |
| spec->sign = '-'; |
| spec->dot = ""; |
| spec->sep = ""; |
| spec->grouping = ""; |
| |
| |
| /* presume that the first character is a UTF-8 fill character */ |
| if ((n = _mpd_copy_utf8(spec->fill, cp)) < 0) { |
| return 0; |
| } |
| |
| /* alignment directive, prefixed by a fill character */ |
| if (*cp && (*(cp+n) == '<' || *(cp+n) == '>' || |
| *(cp+n) == '=' || *(cp+n) == '^')) { |
| cp += n; |
| spec->align = *cp++; |
| have_align = 1; |
| } /* alignment directive */ |
| else { |
| /* default fill character */ |
| spec->fill[0] = ' '; |
| spec->fill[1] = '\0'; |
| if (*cp == '<' || *cp == '>' || |
| *cp == '=' || *cp == '^') { |
| spec->align = *cp++; |
| have_align = 1; |
| } |
| } |
| |
| /* sign formatting */ |
| if (*cp == '+' || *cp == '-' || *cp == ' ') { |
| spec->sign = *cp++; |
| } |
| |
| /* zero padding */ |
| if (*cp == '0') { |
| /* zero padding implies alignment, which should not be |
| * specified twice. */ |
| if (have_align) { |
| return 0; |
| } |
| spec->align = 'z'; |
| spec->fill[0] = *cp++; |
| spec->fill[1] = '\0'; |
| } |
| |
| /* minimum width */ |
| if (isdigit((uchar)*cp)) { |
| if (*cp == '0') { |
| return 0; |
| } |
| errno = 0; |
| spec->min_width = mpd_strtossize(cp, &cp, 10); |
| if (errno == ERANGE || errno == EINVAL) { |
| return 0; |
| } |
| } |
| |
| /* thousands separator */ |
| if (*cp == ',') { |
| spec->dot = "."; |
| spec->sep = ","; |
| spec->grouping = "\003\003"; |
| cp++; |
| } |
| |
| /* fraction digits or significant digits */ |
| if (*cp == '.') { |
| cp++; |
| if (!isdigit((uchar)*cp)) { |
| return 0; |
| } |
| errno = 0; |
| spec->prec = mpd_strtossize(cp, &cp, 10); |
| if (errno == ERANGE || errno == EINVAL) { |
| return 0; |
| } |
| } |
| |
| /* type */ |
| if (*cp == 'E' || *cp == 'e' || *cp == 'F' || *cp == 'f' || |
| *cp == 'G' || *cp == 'g' || *cp == '%') { |
| spec->type = *cp++; |
| } |
| else if (*cp == 'N' || *cp == 'n') { |
| /* locale specific conversion */ |
| struct lconv *lc; |
| /* separator has already been specified */ |
| if (*spec->sep) { |
| return 0; |
| } |
| spec->type = *cp++; |
| spec->type = (spec->type == 'N') ? 'G' : 'g'; |
| lc = localeconv(); |
| spec->dot = lc->decimal_point; |
| spec->sep = lc->thousands_sep; |
| spec->grouping = lc->grouping; |
| if (mpd_validate_lconv(spec) < 0) { |
| return 0; /* GCOV_NOT_REACHED */ |
| } |
| } |
| |
| /* check correctness */ |
| if (*cp != '\0') { |
| return 0; |
| } |
| |
| return 1; |
| } |
| |
| /* |
| * The following functions assume that spec->min_width <= MPD_MAX_PREC, which |
| * is made sure in mpd_qformat_spec. Then, even with a spec that inserts a |
| * four-byte separator after each digit, nbytes in the following struct |
| * cannot overflow. |
| */ |
| |
| /* Multibyte string */ |
| typedef struct { |
| mpd_ssize_t nbytes; /* length in bytes */ |
| mpd_ssize_t nchars; /* length in chars */ |
| mpd_ssize_t cur; /* current write index */ |
| char *data; |
| } mpd_mbstr_t; |
| |
| static inline void |
| _mpd_bcopy(char *dest, const char *src, mpd_ssize_t n) |
| { |
| while (--n >= 0) { |
| dest[n] = src[n]; |
| } |
| } |
| |
| static inline void |
| _mbstr_copy_char(mpd_mbstr_t *dest, const char *src, mpd_ssize_t n) |
| { |
| dest->nbytes += n; |
| dest->nchars += (n > 0 ? 1 : 0); |
| dest->cur -= n; |
| |
| if (dest->data != NULL) { |
| _mpd_bcopy(dest->data+dest->cur, src, n); |
| } |
| } |
| |
| static inline void |
| _mbstr_copy_ascii(mpd_mbstr_t *dest, const char *src, mpd_ssize_t n) |
| { |
| dest->nbytes += n; |
| dest->nchars += n; |
| dest->cur -= n; |
| |
| if (dest->data != NULL) { |
| _mpd_bcopy(dest->data+dest->cur, src, n); |
| } |
| } |
| |
| static inline void |
| _mbstr_copy_pad(mpd_mbstr_t *dest, mpd_ssize_t n) |
| { |
| dest->nbytes += n; |
| dest->nchars += n; |
| dest->cur -= n; |
| |
| if (dest->data != NULL) { |
| char *cp = dest->data + dest->cur; |
| while (--n >= 0) { |
| cp[n] = '0'; |
| } |
| } |
| } |
| |
| /* |
| * Copy a numeric string to dest->data, adding separators in the integer |
| * part according to spec->grouping. If leading zero padding is enabled |
| * and the result is smaller than spec->min_width, continue adding zeros |
| * and separators until the minimum width is reached. |
| * |
| * The final length of dest->data is stored in dest->nbytes. The number |
| * of UTF-8 characters is stored in dest->nchars. |
| * |
| * First run (dest->data == NULL): determine the length of the result |
| * string and store it in dest->nbytes. |
| * |
| * Second run (write to dest->data): data is written in chunks and in |
| * reverse order, starting with the rest of the numeric string. |
| */ |
| static void |
| _mpd_add_sep_dot(mpd_mbstr_t *dest, |
| const char *sign, /* location of optional sign */ |
| const char *src, mpd_ssize_t n_src, /* integer part and length */ |
| const char *dot, /* location of optional decimal point */ |
| const char *rest, mpd_ssize_t n_rest, /* remaining part and length */ |
| const mpd_spec_t *spec) |
| { |
| mpd_ssize_t n_sep, n_sign, consume; |
| const char *g; |
| int pad = 0; |
| |
| n_sign = sign ? 1 : 0; |
| n_sep = (mpd_ssize_t)strlen(spec->sep); |
| /* Initial write index: set to location of '\0' in the output string. |
| * Irrelevant for the first run. */ |
| dest->cur = dest->nbytes; |
| dest->nbytes = dest->nchars = 0; |
| |
| _mbstr_copy_ascii(dest, rest, n_rest); |
| |
| if (dot) { |
| _mbstr_copy_char(dest, dot, (mpd_ssize_t)strlen(dot)); |
| } |
| |
| g = spec->grouping; |
| consume = *g; |
| while (1) { |
| /* If the group length is 0 or CHAR_MAX or greater than the |
| * number of source bytes, consume all remaining bytes. */ |
| if (*g == 0 || *g == CHAR_MAX || consume > n_src) { |
| consume = n_src; |
| } |
| n_src -= consume; |
| if (pad) { |
| _mbstr_copy_pad(dest, consume); |
| } |
| else { |
| _mbstr_copy_ascii(dest, src+n_src, consume); |
| } |
| |
| if (n_src == 0) { |
| /* Either the real source of intpart digits or the virtual |
| * source of padding zeros is exhausted. */ |
| if (spec->align == 'z' && |
| dest->nchars + n_sign < spec->min_width) { |
| /* Zero padding is set and length < min_width: |
| * Generate n_src additional characters. */ |
| n_src = spec->min_width - (dest->nchars + n_sign); |
| /* Next iteration: |
| * case *g == 0 || *g == CHAR_MAX: |
| * consume all padding characters |
| * case consume < g*: |
| * fill remainder of current group |
| * case consume == g* |
| * copying is a no-op */ |
| consume = *g - consume; |
| /* Switch on virtual source of zeros. */ |
| pad = 1; |
| continue; |
| } |
| break; |
| } |
| |
| if (n_sep > 0) { |
| /* If padding is switched on, separators are counted |
| * as padding characters. This rule does not apply if |
| * the separator would be the first character of the |
| * result string. */ |
| if (pad && n_src > 1) n_src -= 1; |
| _mbstr_copy_char(dest, spec->sep, n_sep); |
| } |
| |
| /* If non-NUL, use the next value for grouping. */ |
| if (*g && *(g+1)) g++; |
| consume = *g; |
| } |
| |
| if (sign) { |
| _mbstr_copy_ascii(dest, sign, 1); |
| } |
| |
| if (dest->data) { |
| dest->data[dest->nbytes] = '\0'; |
| } |
| } |
| |
| /* |
| * Convert a numeric-string to its locale-specific appearance. |
| * The string must have one of these forms: |
| * |
| * 1) [sign] digits [exponent-part] |
| * 2) [sign] digits '.' [digits] [exponent-part] |
| * |
| * Not allowed, since _mpd_to_string() never returns this form: |
| * |
| * 3) [sign] '.' digits [exponent-part] |
| * |
| * Input: result->data := original numeric string (ASCII) |
| * result->bytes := strlen(result->data) |
| * result->nchars := strlen(result->data) |
| * |
| * Output: result->data := modified or original string |
| * result->bytes := strlen(result->data) |
| * result->nchars := number of characters (possibly UTF-8) |
| */ |
| static int |
| _mpd_apply_lconv(mpd_mbstr_t *result, const mpd_spec_t *spec, uint32_t *status) |
| { |
| const char *sign = NULL, *intpart = NULL, *dot = NULL; |
| const char *rest, *dp; |
| char *decstring; |
| mpd_ssize_t n_int, n_rest; |
| |
| /* original numeric string */ |
| dp = result->data; |
| |
| /* sign */ |
| if (*dp == '+' || *dp == '-' || *dp == ' ') { |
| sign = dp++; |
| } |
| /* integer part */ |
| assert(isdigit((uchar)*dp)); |
| intpart = dp++; |
| while (isdigit((uchar)*dp)) { |
| dp++; |
| } |
| n_int = (mpd_ssize_t)(dp-intpart); |
| /* decimal point */ |
| if (*dp == '.') { |
| dp++; dot = spec->dot; |
| } |
| /* rest */ |
| rest = dp; |
| n_rest = result->nbytes - (mpd_ssize_t)(dp-result->data); |
| |
| if (dot == NULL && (*spec->sep == '\0' || *spec->grouping == '\0')) { |
| /* _mpd_add_sep_dot() would not change anything */ |
| return 1; |
| } |
| |
| /* Determine the size of the new decimal string after inserting the |
| * decimal point, optional separators and optional padding. */ |
| decstring = result->data; |
| result->data = NULL; |
| _mpd_add_sep_dot(result, sign, intpart, n_int, dot, |
| rest, n_rest, spec); |
| |
| result->data = mpd_alloc(result->nbytes+1, 1); |
| if (result->data == NULL) { |
| *status |= MPD_Malloc_error; |
| mpd_free(decstring); |
| return 0; |
| } |
| |
| /* Perform actual writes. */ |
| _mpd_add_sep_dot(result, sign, intpart, n_int, dot, |
| rest, n_rest, spec); |
| |
| mpd_free(decstring); |
| return 1; |
| } |
| |
| /* Add padding to the formatted string if necessary. */ |
| static int |
| _mpd_add_pad(mpd_mbstr_t *result, const mpd_spec_t *spec, uint32_t *status) |
| { |
| if (result->nchars < spec->min_width) { |
| mpd_ssize_t add_chars, add_bytes; |
| size_t lpad = 0, rpad = 0; |
| size_t n_fill, len, i, j; |
| char align = spec->align; |
| uint8_t err = 0; |
| char *cp; |
| |
| n_fill = strlen(spec->fill); |
| add_chars = (spec->min_width - result->nchars); |
| /* max value: MPD_MAX_PREC * 4 */ |
| add_bytes = add_chars * (mpd_ssize_t)n_fill; |
| |
| cp = result->data = mpd_realloc(result->data, |
| result->nbytes+add_bytes+1, |
| sizeof *result->data, &err); |
| if (err) { |
| *status |= MPD_Malloc_error; |
| mpd_free(result->data); |
| return 0; |
| } |
| |
| if (align == 'z') { |
| align = '='; |
| } |
| |
| if (align == '<') { |
| rpad = add_chars; |
| } |
| else if (align == '>' || align == '=') { |
| lpad = add_chars; |
| } |
| else { /* align == '^' */ |
| lpad = add_chars/2; |
| rpad = add_chars-lpad; |
| } |
| |
| len = result->nbytes; |
| if (align == '=' && (*cp == '-' || *cp == '+' || *cp == ' ')) { |
| /* leave sign in the leading position */ |
| cp++; len--; |
| } |
| |
| memmove(cp+n_fill*lpad, cp, len); |
| for (i = 0; i < lpad; i++) { |
| for (j = 0; j < n_fill; j++) { |
| cp[i*n_fill+j] = spec->fill[j]; |
| } |
| } |
| cp += (n_fill*lpad + len); |
| for (i = 0; i < rpad; i++) { |
| for (j = 0; j < n_fill; j++) { |
| cp[i*n_fill+j] = spec->fill[j]; |
| } |
| } |
| |
| result->nbytes += add_bytes; |
| result->nchars += add_chars; |
| result->data[result->nbytes] = '\0'; |
| } |
| |
| return 1; |
| } |
| |
| /* Round a number to prec digits. The adjusted exponent stays the same |
| or increases by one if rounding up crosses a power of ten boundary. |
| If result->digits would exceed MPD_MAX_PREC+1, MPD_Invalid_operation |
| is set and the result is NaN. */ |
| static inline void |
| _mpd_round(mpd_t *result, const mpd_t *a, mpd_ssize_t prec, |
| const mpd_context_t *ctx, uint32_t *status) |
| { |
| mpd_ssize_t exp = a->exp + a->digits - prec; |
| |
| if (prec <= 0) { |
| mpd_seterror(result, MPD_Invalid_operation, status); /* GCOV_NOT_REACHED */ |
| return; /* GCOV_NOT_REACHED */ |
| } |
| if (mpd_isspecial(a) || mpd_iszero(a)) { |
| mpd_qcopy(result, a, status); /* GCOV_NOT_REACHED */ |
| return; /* GCOV_NOT_REACHED */ |
| } |
| |
| mpd_qrescale_fmt(result, a, exp, ctx, status); |
| if (result->digits > prec) { |
| mpd_qrescale_fmt(result, result, exp+1, ctx, status); |
| } |
| } |
| |
| /* |
| * Return the string representation of an mpd_t, formatted according to 'spec'. |
| * The format specification is assumed to be valid. Memory errors are indicated |
| * as usual. This function is quiet. |
| */ |
| char * |
| mpd_qformat_spec(const mpd_t *dec, const mpd_spec_t *spec, |
| const mpd_context_t *ctx, uint32_t *status) |
| { |
| mpd_uint_t dt[MPD_MINALLOC_MAX]; |
| mpd_t tmp = {MPD_STATIC|MPD_STATIC_DATA,0,0,0,MPD_MINALLOC_MAX,dt}; |
| mpd_ssize_t dplace = MPD_DEFAULT_DOTPLACE; |
| mpd_mbstr_t result; |
| mpd_spec_t stackspec; |
| char type = spec->type; |
| int flags = 0; |
| |
| |
| if (spec->min_width > MPD_MAX_PREC) { |
| *status |= MPD_Invalid_operation; |
| return NULL; |
| } |
| |
| if (isupper((uchar)type)) { |
| type = tolower((uchar)type); |
| flags |= MPD_FMT_UPPER; |
| } |
| if (spec->sign == ' ') { |
| flags |= MPD_FMT_SIGN_SPACE; |
| } |
| else if (spec->sign == '+') { |
| flags |= MPD_FMT_SIGN_PLUS; |
| } |
| |
| if (mpd_isspecial(dec)) { |
| if (spec->align == 'z') { |
| stackspec = *spec; |
| stackspec.fill[0] = ' '; |
| stackspec.fill[1] = '\0'; |
| stackspec.align = '>'; |
| spec = &stackspec; |
| } |
| } |
| else { |
| uint32_t workstatus = 0; |
| mpd_ssize_t prec; |
| |
| switch (type) { |
| case 'g': flags |= MPD_FMT_TOSCI; break; |
| case 'e': flags |= MPD_FMT_EXP; break; |
| case '%': flags |= MPD_FMT_PERCENT; |
| if (!mpd_qcopy(&tmp, dec, status)) { |
| return NULL; |
| } |
| tmp.exp += 2; |
| dec = &tmp; |
| type = 'f'; /* fall through */ |
| case 'f': flags |= MPD_FMT_FIXED; break; |
| default: abort(); /* debug: GCOV_NOT_REACHED */ |
| } |
| |
| if (spec->prec >= 0) { |
| if (spec->prec > MPD_MAX_PREC) { |
| *status |= MPD_Invalid_operation; |
| goto error; |
| } |
| |
| switch (type) { |
| case 'g': |
| prec = (spec->prec == 0) ? 1 : spec->prec; |
| if (dec->digits > prec) { |
| _mpd_round(&tmp, dec, prec, ctx, |
| &workstatus); |
| dec = &tmp; |
| } |
| break; |
| case 'e': |
| if (mpd_iszero(dec)) { |
| dplace = 1-spec->prec; |
| } |
| else { |
| _mpd_round(&tmp, dec, spec->prec+1, ctx, |
| &workstatus); |
| dec = &tmp; |
| } |
| break; |
| case 'f': |
| mpd_qrescale(&tmp, dec, -spec->prec, ctx, |
| &workstatus); |
| dec = &tmp; |
| break; |
| } |
| } |
| |
| if (type == 'f') { |
| if (mpd_iszero(dec) && dec->exp > 0) { |
| mpd_qrescale(&tmp, dec, 0, ctx, &workstatus); |
| dec = &tmp; |
| } |
| } |
| |
| if (workstatus&MPD_Errors) { |
| *status |= (workstatus&MPD_Errors); |
| goto error; |
| } |
| } |
| |
| /* |
| * At this point, for all scaled or non-scaled decimals: |
| * 1) 1 <= digits <= MAX_PREC+1 |
| * 2) adjexp(scaled) = adjexp(orig) [+1] |
| * 3) case 'g': MIN_ETINY <= exp <= MAX_EMAX+1 |
| * case 'e': MIN_ETINY-MAX_PREC <= exp <= MAX_EMAX+1 |
| * case 'f': MIN_ETINY <= exp <= MAX_EMAX+1 |
| * 4) max memory alloc in _mpd_to_string: |
| * case 'g': MAX_PREC+36 |
| * case 'e': MAX_PREC+36 |
| * case 'f': 2*MPD_MAX_PREC+30 |
| */ |
| result.nbytes = _mpd_to_string(&result.data, dec, flags, dplace); |
| result.nchars = result.nbytes; |
| if (result.nbytes < 0) { |
| *status |= MPD_Malloc_error; |
| goto error; |
| } |
| |
| if (*spec->dot != '\0' && !mpd_isspecial(dec)) { |
| if (result.nchars > MPD_MAX_PREC+36) { |
| /* Since a group length of one is not explicitly |
| * disallowed, ensure that it is always possible to |
| * insert a four byte separator after each digit. */ |
| *status |= MPD_Invalid_operation; |
| mpd_free(result.data); |
| goto error; |
| } |
| if (!_mpd_apply_lconv(&result, spec, status)) { |
| goto error; |
| } |
| } |
| |
| if (spec->min_width) { |
| if (!_mpd_add_pad(&result, spec, status)) { |
| goto error; |
| } |
| } |
| |
| mpd_del(&tmp); |
| return result.data; |
| |
| error: |
| mpd_del(&tmp); |
| return NULL; |
| } |
| |
| char * |
| mpd_qformat(const mpd_t *dec, const char *fmt, const mpd_context_t *ctx, |
| uint32_t *status) |
| { |
| mpd_spec_t spec; |
| |
| if (!mpd_parse_fmt_str(&spec, fmt, 1)) { |
| *status |= MPD_Invalid_operation; |
| return NULL; |
| } |
| |
| return mpd_qformat_spec(dec, &spec, ctx, status); |
| } |
| |
| /* |
| * The specification has a *condition* called Invalid_operation and an |
| * IEEE *signal* called Invalid_operation. The former corresponds to |
| * MPD_Invalid_operation, the latter to MPD_IEEE_Invalid_operation. |
| * MPD_IEEE_Invalid_operation comprises the following conditions: |
| * |
| * [MPD_Conversion_syntax, MPD_Division_impossible, MPD_Division_undefined, |
| * MPD_Fpu_error, MPD_Invalid_context, MPD_Invalid_operation, |
| * MPD_Malloc_error] |
| * |
| * In the following functions, 'flag' denotes the condition, 'signal' |
| * denotes the IEEE signal. |
| */ |
| |
| static const char *mpd_flag_string[MPD_NUM_FLAGS] = { |
| "Clamped", |
| "Conversion_syntax", |
| "Division_by_zero", |
| "Division_impossible", |
| "Division_undefined", |
| "Fpu_error", |
| "Inexact", |
| "Invalid_context", |
| "Invalid_operation", |
| "Malloc_error", |
| "Not_implemented", |
| "Overflow", |
| "Rounded", |
| "Subnormal", |
| "Underflow", |
| }; |
| |
| static const char *mpd_signal_string[MPD_NUM_FLAGS] = { |
| "Clamped", |
| "IEEE_Invalid_operation", |
| "Division_by_zero", |
| "IEEE_Invalid_operation", |
| "IEEE_Invalid_operation", |
| "IEEE_Invalid_operation", |
| "Inexact", |
| "IEEE_Invalid_operation", |
| "IEEE_Invalid_operation", |
| "IEEE_Invalid_operation", |
| "Not_implemented", |
| "Overflow", |
| "Rounded", |
| "Subnormal", |
| "Underflow", |
| }; |
| |
| /* print conditions to buffer, separated by spaces */ |
| int |
| mpd_snprint_flags(char *dest, int nmemb, uint32_t flags) |
| { |
| char *cp; |
| int n, j; |
| |
| assert(nmemb >= MPD_MAX_FLAG_STRING); |
| |
| *dest = '\0'; cp = dest; |
| for (j = 0; j < MPD_NUM_FLAGS; j++) { |
| if (flags & (1U<<j)) { |
| n = snprintf(cp, nmemb, "%s ", mpd_flag_string[j]); |
| if (n < 0 || n >= nmemb) return -1; |
| cp += n; nmemb -= n; |
| } |
| } |
| |
| if (cp != dest) { |
| *(--cp) = '\0'; |
| } |
| |
| return (int)(cp-dest); |
| } |
| |
| /* print conditions to buffer, in list form */ |
| int |
| mpd_lsnprint_flags(char *dest, int nmemb, uint32_t flags, const char *flag_string[]) |
| { |
| char *cp; |
| int n, j; |
| |
| assert(nmemb >= MPD_MAX_FLAG_LIST); |
| if (flag_string == NULL) { |
| flag_string = mpd_flag_string; |
| } |
| |
| *dest = '['; |
| *(dest+1) = '\0'; |
| cp = dest+1; |
| --nmemb; |
| |
| for (j = 0; j < MPD_NUM_FLAGS; j++) { |
| if (flags & (1U<<j)) { |
| n = snprintf(cp, nmemb, "%s, ", flag_string[j]); |
| if (n < 0 || n >= nmemb) return -1; |
| cp += n; nmemb -= n; |
| } |
| } |
| |
| /* erase the last ", " */ |
| if (cp != dest+1) { |
| cp -= 2; |
| } |
| |
| *cp++ = ']'; |
| *cp = '\0'; |
| |
| return (int)(cp-dest); /* strlen, without NUL terminator */ |
| } |
| |
| /* print signals to buffer, in list form */ |
| int |
| mpd_lsnprint_signals(char *dest, int nmemb, uint32_t flags, const char *signal_string[]) |
| { |
| char *cp; |
| int n, j; |
| int ieee_invalid_done = 0; |
| |
| assert(nmemb >= MPD_MAX_SIGNAL_LIST); |
| if (signal_string == NULL) { |
| signal_string = mpd_signal_string; |
| } |
| |
| *dest = '['; |
| *(dest+1) = '\0'; |
| cp = dest+1; |
| --nmemb; |
| |
| for (j = 0; j < MPD_NUM_FLAGS; j++) { |
| uint32_t f = flags & (1U<<j); |
| if (f) { |
| if (f&MPD_IEEE_Invalid_operation) { |
| if (ieee_invalid_done) { |
| continue; |
| } |
| ieee_invalid_done = 1; |
| } |
| n = snprintf(cp, nmemb, "%s, ", signal_string[j]); |
| if (n < 0 || n >= nmemb) return -1; |
| cp += n; nmemb -= n; |
| } |
| } |
| |
| /* erase the last ", " */ |
| if (cp != dest+1) { |
| cp -= 2; |
| } |
| |
| *cp++ = ']'; |
| *cp = '\0'; |
| |
| return (int)(cp-dest); /* strlen, without NUL terminator */ |
| } |
| |
| /* The following two functions are mainly intended for debugging. */ |
| void |
| mpd_fprint(FILE *file, const mpd_t *dec) |
| { |
| char *decstring; |
| |
| decstring = mpd_to_sci(dec, 1); |
| if (decstring != NULL) { |
| fprintf(file, "%s\n", decstring); |
| mpd_free(decstring); |
| } |
| else { |
| fputs("mpd_fprint: output error\n", file); /* GCOV_NOT_REACHED */ |
| } |
| } |
| |
| void |
| mpd_print(const mpd_t *dec) |
| { |
| char *decstring; |
| |
| decstring = mpd_to_sci(dec, 1); |
| if (decstring != NULL) { |
| printf("%s\n", decstring); |
| mpd_free(decstring); |
| } |
| else { |
| fputs("mpd_fprint: output error\n", stderr); /* GCOV_NOT_REACHED */ |
| } |
| } |
| |
| |