| /* quotearg.c - quote arguments for output |
| |
| Copyright (C) 1998-2002, 2004-2012 Free Software Foundation, Inc. |
| |
| This program is free software: you can redistribute it and/or modify |
| it under the terms of the GNU General Public License as published by |
| the Free Software Foundation; either version 3 of the License, or |
| (at your option) any later version. |
| |
| This program 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 General Public License for more details. |
| |
| You should have received a copy of the GNU General Public License |
| along with this program. If not, see <http://www.gnu.org/licenses/>. */ |
| |
| /* Written by Paul Eggert <eggert@twinsun.com> */ |
| |
| /* Without this pragma, gcc 4.7.0 20111124 mistakenly suggests that |
| the quoting_options_from_style function might be candidate for |
| attribute 'pure' */ |
| #if (__GNUC__ == 4 && 6 <= __GNUC_MINOR__) || 4 < __GNUC__ |
| # pragma GCC diagnostic ignored "-Wsuggest-attribute=pure" |
| #endif |
| |
| #include <config.h> |
| |
| #include "quotearg.h" |
| #include "quote.h" |
| |
| #include "xalloc.h" |
| #include "c-strcaseeq.h" |
| #include "localcharset.h" |
| |
| #include <ctype.h> |
| #include <errno.h> |
| #include <limits.h> |
| #include <stdbool.h> |
| #include <stdlib.h> |
| #include <string.h> |
| #include <wchar.h> |
| #include <wctype.h> |
| |
| #include "gettext.h" |
| #define _(msgid) gettext (msgid) |
| #define N_(msgid) msgid |
| |
| #ifndef SIZE_MAX |
| # define SIZE_MAX ((size_t) -1) |
| #endif |
| |
| #define INT_BITS (sizeof (int) * CHAR_BIT) |
| |
| struct quoting_options |
| { |
| /* Basic quoting style. */ |
| enum quoting_style style; |
| |
| /* Additional flags. Bitwise combination of enum quoting_flags. */ |
| int flags; |
| |
| /* Quote the characters indicated by this bit vector even if the |
| quoting style would not normally require them to be quoted. */ |
| unsigned int quote_these_too[(UCHAR_MAX / INT_BITS) + 1]; |
| |
| /* The left quote for custom_quoting_style. */ |
| char const *left_quote; |
| |
| /* The right quote for custom_quoting_style. */ |
| char const *right_quote; |
| }; |
| |
| /* Names of quoting styles. */ |
| char const *const quoting_style_args[] = |
| { |
| "literal", |
| "shell", |
| "shell-always", |
| "c", |
| "c-maybe", |
| "escape", |
| "locale", |
| "clocale", |
| 0 |
| }; |
| |
| /* Correspondences to quoting style names. */ |
| enum quoting_style const quoting_style_vals[] = |
| { |
| literal_quoting_style, |
| shell_quoting_style, |
| shell_always_quoting_style, |
| c_quoting_style, |
| c_maybe_quoting_style, |
| escape_quoting_style, |
| locale_quoting_style, |
| clocale_quoting_style |
| }; |
| |
| /* The default quoting options. */ |
| static struct quoting_options default_quoting_options; |
| |
| /* Allocate a new set of quoting options, with contents initially identical |
| to O if O is not null, or to the default if O is null. |
| It is the caller's responsibility to free the result. */ |
| struct quoting_options * |
| clone_quoting_options (struct quoting_options *o) |
| { |
| int e = errno; |
| struct quoting_options *p = xmemdup (o ? o : &default_quoting_options, |
| sizeof *o); |
| errno = e; |
| return p; |
| } |
| |
| /* Get the value of O's quoting style. If O is null, use the default. */ |
| enum quoting_style |
| get_quoting_style (struct quoting_options *o) |
| { |
| return (o ? o : &default_quoting_options)->style; |
| } |
| |
| /* In O (or in the default if O is null), |
| set the value of the quoting style to S. */ |
| void |
| set_quoting_style (struct quoting_options *o, enum quoting_style s) |
| { |
| (o ? o : &default_quoting_options)->style = s; |
| } |
| |
| /* In O (or in the default if O is null), |
| set the value of the quoting options for character C to I. |
| Return the old value. Currently, the only values defined for I are |
| 0 (the default) and 1 (which means to quote the character even if |
| it would not otherwise be quoted). */ |
| int |
| set_char_quoting (struct quoting_options *o, char c, int i) |
| { |
| unsigned char uc = c; |
| unsigned int *p = |
| (o ? o : &default_quoting_options)->quote_these_too + uc / INT_BITS; |
| int shift = uc % INT_BITS; |
| int r = (*p >> shift) & 1; |
| *p ^= ((i & 1) ^ r) << shift; |
| return r; |
| } |
| |
| /* In O (or in the default if O is null), |
| set the value of the quoting options flag to I, which can be a |
| bitwise combination of enum quoting_flags, or 0 for default |
| behavior. Return the old value. */ |
| int |
| set_quoting_flags (struct quoting_options *o, int i) |
| { |
| int r; |
| if (!o) |
| o = &default_quoting_options; |
| r = o->flags; |
| o->flags = i; |
| return r; |
| } |
| |
| void |
| set_custom_quoting (struct quoting_options *o, |
| char const *left_quote, char const *right_quote) |
| { |
| if (!o) |
| o = &default_quoting_options; |
| o->style = custom_quoting_style; |
| if (!left_quote || !right_quote) |
| abort (); |
| o->left_quote = left_quote; |
| o->right_quote = right_quote; |
| } |
| |
| /* Return quoting options for STYLE, with no extra quoting. */ |
| static struct quoting_options /* NOT PURE!! */ |
| quoting_options_from_style (enum quoting_style style) |
| { |
| struct quoting_options o = { 0, 0, { 0 }, NULL, NULL }; |
| if (style == custom_quoting_style) |
| abort (); |
| o.style = style; |
| return o; |
| } |
| |
| /* MSGID approximates a quotation mark. Return its translation if it |
| has one; otherwise, return either it or "\"", depending on S. |
| |
| S is either clocale_quoting_style or locale_quoting_style. */ |
| static char const * |
| gettext_quote (char const *msgid, enum quoting_style s) |
| { |
| char const *translation = _(msgid); |
| char const *locale_code; |
| |
| if (translation != msgid) |
| return translation; |
| |
| /* For UTF-8 and GB-18030, use single quotes U+2018 and U+2019. |
| Here is a list of other locales that include U+2018 and U+2019: |
| |
| ISO-8859-7 0xA1 KOI8-T 0x91 |
| CP869 0x8B CP874 0x91 |
| CP932 0x81 0x65 CP936 0xA1 0xAE |
| CP949 0xA1 0xAE CP950 0xA1 0xA5 |
| CP1250 0x91 CP1251 0x91 |
| CP1252 0x91 CP1253 0x91 |
| CP1254 0x91 CP1255 0x91 |
| CP1256 0x91 CP1257 0x91 |
| EUC-JP 0xA1 0xC6 EUC-KR 0xA1 0xAE |
| EUC-TW 0xA1 0xE4 BIG5 0xA1 0xA5 |
| BIG5-HKSCS 0xA1 0xA5 EUC-CN 0xA1 0xAE |
| GBK 0xA1 0xAE Georgian-PS 0x91 |
| PT154 0x91 |
| |
| None of these is still in wide use; using iconv is overkill. */ |
| locale_code = locale_charset (); |
| if (STRCASEEQ (locale_code, "UTF-8", 'U','T','F','-','8',0,0,0,0)) |
| return msgid[0] == '`' ? "\xe2\x80\x98": "\xe2\x80\x99"; |
| if (STRCASEEQ (locale_code, "GB18030", 'G','B','1','8','0','3','0',0,0)) |
| return msgid[0] == '`' ? "\xa1\ae": "\xa1\xaf"; |
| |
| return (s == clocale_quoting_style ? "\"" : "'"); |
| } |
| |
| /* Place into buffer BUFFER (of size BUFFERSIZE) a quoted version of |
| argument ARG (of size ARGSIZE), using QUOTING_STYLE, FLAGS, and |
| QUOTE_THESE_TOO to control quoting. |
| Terminate the output with a null character, and return the written |
| size of the output, not counting the terminating null. |
| If BUFFERSIZE is too small to store the output string, return the |
| value that would have been returned had BUFFERSIZE been large enough. |
| If ARGSIZE is SIZE_MAX, use the string length of the argument for ARGSIZE. |
| |
| This function acts like quotearg_buffer (BUFFER, BUFFERSIZE, ARG, |
| ARGSIZE, O), except it breaks O into its component pieces and is |
| not careful about errno. */ |
| |
| static size_t |
| quotearg_buffer_restyled (char *buffer, size_t buffersize, |
| char const *arg, size_t argsize, |
| enum quoting_style quoting_style, int flags, |
| unsigned int const *quote_these_too, |
| char const *left_quote, |
| char const *right_quote) |
| { |
| size_t i; |
| size_t len = 0; |
| char const *quote_string = 0; |
| size_t quote_string_len = 0; |
| bool backslash_escapes = false; |
| bool unibyte_locale = MB_CUR_MAX == 1; |
| bool elide_outer_quotes = (flags & QA_ELIDE_OUTER_QUOTES) != 0; |
| |
| #define STORE(c) \ |
| do \ |
| { \ |
| if (len < buffersize) \ |
| buffer[len] = (c); \ |
| len++; \ |
| } \ |
| while (0) |
| |
| switch (quoting_style) |
| { |
| case c_maybe_quoting_style: |
| quoting_style = c_quoting_style; |
| elide_outer_quotes = true; |
| /* Fall through. */ |
| case c_quoting_style: |
| if (!elide_outer_quotes) |
| STORE ('"'); |
| backslash_escapes = true; |
| quote_string = "\""; |
| quote_string_len = 1; |
| break; |
| |
| case escape_quoting_style: |
| backslash_escapes = true; |
| elide_outer_quotes = false; |
| break; |
| |
| case locale_quoting_style: |
| case clocale_quoting_style: |
| case custom_quoting_style: |
| { |
| if (quoting_style != custom_quoting_style) |
| { |
| /* TRANSLATORS: |
| Get translations for open and closing quotation marks. |
| The message catalog should translate "`" to a left |
| quotation mark suitable for the locale, and similarly for |
| "'". For example, a French Unicode local should translate |
| these to U+00AB (LEFT-POINTING DOUBLE ANGLE |
| QUOTATION MARK), and U+00BB (RIGHT-POINTING DOUBLE ANGLE |
| QUOTATION MARK), respectively. |
| |
| If the catalog has no translation, we will try to |
| use Unicode U+2018 (LEFT SINGLE QUOTATION MARK) and |
| Unicode U+2019 (RIGHT SINGLE QUOTATION MARK). If the |
| current locale is not Unicode, locale_quoting_style |
| will quote 'like this', and clocale_quoting_style will |
| quote "like this". You should always include translations |
| for "`" and "'" even if U+2018 and U+2019 are appropriate |
| for your locale. |
| |
| If you don't know what to put here, please see |
| <http://en.wikipedia.org/wiki/Quotation_marks_in_other_languages> |
| and use glyphs suitable for your language. */ |
| left_quote = gettext_quote (N_("`"), quoting_style); |
| right_quote = gettext_quote (N_("'"), quoting_style); |
| } |
| if (!elide_outer_quotes) |
| for (quote_string = left_quote; *quote_string; quote_string++) |
| STORE (*quote_string); |
| backslash_escapes = true; |
| quote_string = right_quote; |
| quote_string_len = strlen (quote_string); |
| } |
| break; |
| |
| case shell_quoting_style: |
| quoting_style = shell_always_quoting_style; |
| elide_outer_quotes = true; |
| /* Fall through. */ |
| case shell_always_quoting_style: |
| if (!elide_outer_quotes) |
| STORE ('\''); |
| quote_string = "'"; |
| quote_string_len = 1; |
| break; |
| |
| case literal_quoting_style: |
| elide_outer_quotes = false; |
| break; |
| |
| default: |
| abort (); |
| } |
| |
| for (i = 0; ! (argsize == SIZE_MAX ? arg[i] == '\0' : i == argsize); i++) |
| { |
| unsigned char c; |
| unsigned char esc; |
| bool is_right_quote = false; |
| |
| if (backslash_escapes |
| && quote_string_len |
| && i + quote_string_len <= argsize |
| && memcmp (arg + i, quote_string, quote_string_len) == 0) |
| { |
| if (elide_outer_quotes) |
| goto force_outer_quoting_style; |
| is_right_quote = true; |
| } |
| |
| c = arg[i]; |
| switch (c) |
| { |
| case '\0': |
| if (backslash_escapes) |
| { |
| if (elide_outer_quotes) |
| goto force_outer_quoting_style; |
| STORE ('\\'); |
| /* If quote_string were to begin with digits, we'd need to |
| test for the end of the arg as well. However, it's |
| hard to imagine any locale that would use digits in |
| quotes, and set_custom_quoting is documented not to |
| accept them. */ |
| if (i + 1 < argsize && '0' <= arg[i + 1] && arg[i + 1] <= '9') |
| { |
| STORE ('0'); |
| STORE ('0'); |
| } |
| c = '0'; |
| /* We don't have to worry that this last '0' will be |
| backslash-escaped because, again, quote_string should |
| not start with it and because quote_these_too is |
| documented as not accepting it. */ |
| } |
| else if (flags & QA_ELIDE_NULL_BYTES) |
| continue; |
| break; |
| |
| case '?': |
| switch (quoting_style) |
| { |
| case shell_always_quoting_style: |
| if (elide_outer_quotes) |
| goto force_outer_quoting_style; |
| break; |
| |
| case c_quoting_style: |
| if ((flags & QA_SPLIT_TRIGRAPHS) |
| && i + 2 < argsize && arg[i + 1] == '?') |
| switch (arg[i + 2]) |
| { |
| case '!': case '\'': |
| case '(': case ')': case '-': case '/': |
| case '<': case '=': case '>': |
| /* Escape the second '?' in what would otherwise be |
| a trigraph. */ |
| if (elide_outer_quotes) |
| goto force_outer_quoting_style; |
| c = arg[i + 2]; |
| i += 2; |
| STORE ('?'); |
| STORE ('"'); |
| STORE ('"'); |
| STORE ('?'); |
| break; |
| |
| default: |
| break; |
| } |
| break; |
| |
| default: |
| break; |
| } |
| break; |
| |
| case '\a': esc = 'a'; goto c_escape; |
| case '\b': esc = 'b'; goto c_escape; |
| case '\f': esc = 'f'; goto c_escape; |
| case '\n': esc = 'n'; goto c_and_shell_escape; |
| case '\r': esc = 'r'; goto c_and_shell_escape; |
| case '\t': esc = 't'; goto c_and_shell_escape; |
| case '\v': esc = 'v'; goto c_escape; |
| case '\\': esc = c; |
| /* No need to escape the escape if we are trying to elide |
| outer quotes and nothing else is problematic. */ |
| if (backslash_escapes && elide_outer_quotes && quote_string_len) |
| goto store_c; |
| |
| c_and_shell_escape: |
| if (quoting_style == shell_always_quoting_style |
| && elide_outer_quotes) |
| goto force_outer_quoting_style; |
| /* Fall through. */ |
| c_escape: |
| if (backslash_escapes) |
| { |
| c = esc; |
| goto store_escape; |
| } |
| break; |
| |
| case '{': case '}': /* sometimes special if isolated */ |
| if (! (argsize == SIZE_MAX ? arg[1] == '\0' : argsize == 1)) |
| break; |
| /* Fall through. */ |
| case '#': case '~': |
| if (i != 0) |
| break; |
| /* Fall through. */ |
| case ' ': |
| case '!': /* special in bash */ |
| case '"': case '$': case '&': |
| case '(': case ')': case '*': case ';': |
| case '<': |
| case '=': /* sometimes special in 0th or (with "set -k") later args */ |
| case '>': case '[': |
| case '^': /* special in old /bin/sh, e.g. SunOS 4.1.4 */ |
| case '`': case '|': |
| /* A shell special character. In theory, '$' and '`' could |
| be the first bytes of multibyte characters, which means |
| we should check them with mbrtowc, but in practice this |
| doesn't happen so it's not worth worrying about. */ |
| if (quoting_style == shell_always_quoting_style |
| && elide_outer_quotes) |
| goto force_outer_quoting_style; |
| break; |
| |
| case '\'': |
| if (quoting_style == shell_always_quoting_style) |
| { |
| if (elide_outer_quotes) |
| goto force_outer_quoting_style; |
| STORE ('\''); |
| STORE ('\\'); |
| STORE ('\''); |
| } |
| break; |
| |
| case '%': case '+': case ',': case '-': case '.': case '/': |
| case '0': case '1': case '2': case '3': case '4': case '5': |
| case '6': case '7': case '8': case '9': case ':': |
| case 'A': case 'B': case 'C': case 'D': case 'E': case 'F': |
| case 'G': case 'H': case 'I': case 'J': case 'K': case 'L': |
| case 'M': case 'N': case 'O': case 'P': case 'Q': case 'R': |
| case 'S': case 'T': case 'U': case 'V': case 'W': case 'X': |
| case 'Y': case 'Z': case ']': case '_': case 'a': case 'b': |
| case 'c': case 'd': case 'e': case 'f': case 'g': case 'h': |
| case 'i': case 'j': case 'k': case 'l': case 'm': case 'n': |
| case 'o': case 'p': case 'q': case 'r': case 's': case 't': |
| case 'u': case 'v': case 'w': case 'x': case 'y': case 'z': |
| /* These characters don't cause problems, no matter what the |
| quoting style is. They cannot start multibyte sequences. |
| A digit or a special letter would cause trouble if it |
| appeared at the beginning of quote_string because we'd then |
| escape by prepending a backslash. However, it's hard to |
| imagine any locale that would use digits or letters as |
| quotes, and set_custom_quoting is documented not to accept |
| them. Also, a digit or a special letter would cause |
| trouble if it appeared in quote_these_too, but that's also |
| documented as not accepting them. */ |
| break; |
| |
| default: |
| /* If we have a multibyte sequence, copy it until we reach |
| its end, find an error, or come back to the initial shift |
| state. For C-like styles, if the sequence has |
| unprintable characters, escape the whole sequence, since |
| we can't easily escape single characters within it. */ |
| { |
| /* Length of multibyte sequence found so far. */ |
| size_t m; |
| |
| bool printable; |
| |
| if (unibyte_locale) |
| { |
| m = 1; |
| printable = isprint (c) != 0; |
| } |
| else |
| { |
| mbstate_t mbstate; |
| memset (&mbstate, 0, sizeof mbstate); |
| |
| m = 0; |
| printable = true; |
| if (argsize == SIZE_MAX) |
| argsize = strlen (arg); |
| |
| do |
| { |
| wchar_t w; |
| size_t bytes = mbrtowc (&w, &arg[i + m], |
| argsize - (i + m), &mbstate); |
| if (bytes == 0) |
| break; |
| else if (bytes == (size_t) -1) |
| { |
| printable = false; |
| break; |
| } |
| else if (bytes == (size_t) -2) |
| { |
| printable = false; |
| while (i + m < argsize && arg[i + m]) |
| m++; |
| break; |
| } |
| else |
| { |
| /* Work around a bug with older shells that "see" a '\' |
| that is really the 2nd byte of a multibyte character. |
| In practice the problem is limited to ASCII |
| chars >= '@' that are shell special chars. */ |
| if ('[' == 0x5b && elide_outer_quotes |
| && quoting_style == shell_always_quoting_style) |
| { |
| size_t j; |
| for (j = 1; j < bytes; j++) |
| switch (arg[i + m + j]) |
| { |
| case '[': case '\\': case '^': |
| case '`': case '|': |
| goto force_outer_quoting_style; |
| |
| default: |
| break; |
| } |
| } |
| |
| if (! iswprint (w)) |
| printable = false; |
| m += bytes; |
| } |
| } |
| while (! mbsinit (&mbstate)); |
| } |
| |
| if (1 < m || (backslash_escapes && ! printable)) |
| { |
| /* Output a multibyte sequence, or an escaped |
| unprintable unibyte character. */ |
| size_t ilim = i + m; |
| |
| for (;;) |
| { |
| if (backslash_escapes && ! printable) |
| { |
| if (elide_outer_quotes) |
| goto force_outer_quoting_style; |
| STORE ('\\'); |
| STORE ('0' + (c >> 6)); |
| STORE ('0' + ((c >> 3) & 7)); |
| c = '0' + (c & 7); |
| } |
| else if (is_right_quote) |
| { |
| STORE ('\\'); |
| is_right_quote = false; |
| } |
| if (ilim <= i + 1) |
| break; |
| STORE (c); |
| c = arg[++i]; |
| } |
| |
| goto store_c; |
| } |
| } |
| } |
| |
| if (! ((backslash_escapes || elide_outer_quotes) |
| && quote_these_too |
| && quote_these_too[c / INT_BITS] & (1 << (c % INT_BITS))) |
| && !is_right_quote) |
| goto store_c; |
| |
| store_escape: |
| if (elide_outer_quotes) |
| goto force_outer_quoting_style; |
| STORE ('\\'); |
| |
| store_c: |
| STORE (c); |
| } |
| |
| if (len == 0 && quoting_style == shell_always_quoting_style |
| && elide_outer_quotes) |
| goto force_outer_quoting_style; |
| |
| if (quote_string && !elide_outer_quotes) |
| for (; *quote_string; quote_string++) |
| STORE (*quote_string); |
| |
| if (len < buffersize) |
| buffer[len] = '\0'; |
| return len; |
| |
| force_outer_quoting_style: |
| /* Don't reuse quote_these_too, since the addition of outer quotes |
| sufficiently quotes the specified characters. */ |
| return quotearg_buffer_restyled (buffer, buffersize, arg, argsize, |
| quoting_style, |
| flags & ~QA_ELIDE_OUTER_QUOTES, NULL, |
| left_quote, right_quote); |
| } |
| |
| /* Place into buffer BUFFER (of size BUFFERSIZE) a quoted version of |
| argument ARG (of size ARGSIZE), using O to control quoting. |
| If O is null, use the default. |
| Terminate the output with a null character, and return the written |
| size of the output, not counting the terminating null. |
| If BUFFERSIZE is too small to store the output string, return the |
| value that would have been returned had BUFFERSIZE been large enough. |
| If ARGSIZE is SIZE_MAX, use the string length of the argument for |
| ARGSIZE. */ |
| size_t |
| quotearg_buffer (char *buffer, size_t buffersize, |
| char const *arg, size_t argsize, |
| struct quoting_options const *o) |
| { |
| struct quoting_options const *p = o ? o : &default_quoting_options; |
| int e = errno; |
| size_t r = quotearg_buffer_restyled (buffer, buffersize, arg, argsize, |
| p->style, p->flags, p->quote_these_too, |
| p->left_quote, p->right_quote); |
| errno = e; |
| return r; |
| } |
| |
| /* Equivalent to quotearg_alloc (ARG, ARGSIZE, NULL, O). */ |
| char * |
| quotearg_alloc (char const *arg, size_t argsize, |
| struct quoting_options const *o) |
| { |
| return quotearg_alloc_mem (arg, argsize, NULL, o); |
| } |
| |
| /* Like quotearg_buffer (..., ARG, ARGSIZE, O), except return newly |
| allocated storage containing the quoted string, and store the |
| resulting size into *SIZE, if non-NULL. The result can contain |
| embedded null bytes only if ARGSIZE is not SIZE_MAX, SIZE is not |
| NULL, and set_quoting_flags has not set the null byte elision |
| flag. */ |
| char * |
| quotearg_alloc_mem (char const *arg, size_t argsize, size_t *size, |
| struct quoting_options const *o) |
| { |
| struct quoting_options const *p = o ? o : &default_quoting_options; |
| int e = errno; |
| /* Elide embedded null bytes if we can't return a size. */ |
| int flags = p->flags | (size ? 0 : QA_ELIDE_NULL_BYTES); |
| size_t bufsize = quotearg_buffer_restyled (0, 0, arg, argsize, p->style, |
| flags, p->quote_these_too, |
| p->left_quote, |
| p->right_quote) + 1; |
| char *buf = xcharalloc (bufsize); |
| quotearg_buffer_restyled (buf, bufsize, arg, argsize, p->style, flags, |
| p->quote_these_too, |
| p->left_quote, p->right_quote); |
| errno = e; |
| if (size) |
| *size = bufsize - 1; |
| return buf; |
| } |
| |
| /* A storage slot with size and pointer to a value. */ |
| struct slotvec |
| { |
| size_t size; |
| char *val; |
| }; |
| |
| /* Preallocate a slot 0 buffer, so that the caller can always quote |
| one small component of a "memory exhausted" message in slot 0. */ |
| static char slot0[256]; |
| static unsigned int nslots = 1; |
| static struct slotvec slotvec0 = {sizeof slot0, slot0}; |
| static struct slotvec *slotvec = &slotvec0; |
| |
| void |
| quotearg_free (void) |
| { |
| struct slotvec *sv = slotvec; |
| unsigned int i; |
| for (i = 1; i < nslots; i++) |
| free (sv[i].val); |
| if (sv[0].val != slot0) |
| { |
| free (sv[0].val); |
| slotvec0.size = sizeof slot0; |
| slotvec0.val = slot0; |
| } |
| if (sv != &slotvec0) |
| { |
| free (sv); |
| slotvec = &slotvec0; |
| } |
| nslots = 1; |
| } |
| |
| /* Use storage slot N to return a quoted version of argument ARG. |
| ARG is of size ARGSIZE, but if that is SIZE_MAX, ARG is a |
| null-terminated string. |
| OPTIONS specifies the quoting options. |
| The returned value points to static storage that can be |
| reused by the next call to this function with the same value of N. |
| N must be nonnegative. N is deliberately declared with type "int" |
| to allow for future extensions (using negative values). */ |
| static char * |
| quotearg_n_options (int n, char const *arg, size_t argsize, |
| struct quoting_options const *options) |
| { |
| int e = errno; |
| |
| unsigned int n0 = n; |
| struct slotvec *sv = slotvec; |
| |
| if (n < 0) |
| abort (); |
| |
| if (nslots <= n0) |
| { |
| /* FIXME: technically, the type of n1 should be 'unsigned int', |
| but that evokes an unsuppressible warning from gcc-4.0.1 and |
| older. If gcc ever provides an option to suppress that warning, |
| revert to the original type, so that the test in xalloc_oversized |
| is once again performed only at compile time. */ |
| size_t n1 = n0 + 1; |
| bool preallocated = (sv == &slotvec0); |
| |
| if (xalloc_oversized (n1, sizeof *sv)) |
| xalloc_die (); |
| |
| slotvec = sv = xrealloc (preallocated ? NULL : sv, n1 * sizeof *sv); |
| if (preallocated) |
| *sv = slotvec0; |
| memset (sv + nslots, 0, (n1 - nslots) * sizeof *sv); |
| nslots = n1; |
| } |
| |
| { |
| size_t size = sv[n].size; |
| char *val = sv[n].val; |
| /* Elide embedded null bytes since we don't return a size. */ |
| int flags = options->flags | QA_ELIDE_NULL_BYTES; |
| size_t qsize = quotearg_buffer_restyled (val, size, arg, argsize, |
| options->style, flags, |
| options->quote_these_too, |
| options->left_quote, |
| options->right_quote); |
| |
| if (size <= qsize) |
| { |
| sv[n].size = size = qsize + 1; |
| if (val != slot0) |
| free (val); |
| sv[n].val = val = xcharalloc (size); |
| quotearg_buffer_restyled (val, size, arg, argsize, options->style, |
| flags, options->quote_these_too, |
| options->left_quote, |
| options->right_quote); |
| } |
| |
| errno = e; |
| return val; |
| } |
| } |
| |
| char * |
| quotearg_n (int n, char const *arg) |
| { |
| return quotearg_n_options (n, arg, SIZE_MAX, &default_quoting_options); |
| } |
| |
| char * |
| quotearg_n_mem (int n, char const *arg, size_t argsize) |
| { |
| return quotearg_n_options (n, arg, argsize, &default_quoting_options); |
| } |
| |
| char * |
| quotearg (char const *arg) |
| { |
| return quotearg_n (0, arg); |
| } |
| |
| char * |
| quotearg_mem (char const *arg, size_t argsize) |
| { |
| return quotearg_n_mem (0, arg, argsize); |
| } |
| |
| char * |
| quotearg_n_style (int n, enum quoting_style s, char const *arg) |
| { |
| struct quoting_options const o = quoting_options_from_style (s); |
| return quotearg_n_options (n, arg, SIZE_MAX, &o); |
| } |
| |
| char * |
| quotearg_n_style_mem (int n, enum quoting_style s, |
| char const *arg, size_t argsize) |
| { |
| struct quoting_options const o = quoting_options_from_style (s); |
| return quotearg_n_options (n, arg, argsize, &o); |
| } |
| |
| char * |
| quotearg_style (enum quoting_style s, char const *arg) |
| { |
| return quotearg_n_style (0, s, arg); |
| } |
| |
| char * |
| quotearg_style_mem (enum quoting_style s, char const *arg, size_t argsize) |
| { |
| return quotearg_n_style_mem (0, s, arg, argsize); |
| } |
| |
| char * |
| quotearg_char_mem (char const *arg, size_t argsize, char ch) |
| { |
| struct quoting_options options; |
| options = default_quoting_options; |
| set_char_quoting (&options, ch, 1); |
| return quotearg_n_options (0, arg, argsize, &options); |
| } |
| |
| char * |
| quotearg_char (char const *arg, char ch) |
| { |
| return quotearg_char_mem (arg, SIZE_MAX, ch); |
| } |
| |
| char * |
| quotearg_colon (char const *arg) |
| { |
| return quotearg_char (arg, ':'); |
| } |
| |
| char * |
| quotearg_colon_mem (char const *arg, size_t argsize) |
| { |
| return quotearg_char_mem (arg, argsize, ':'); |
| } |
| |
| char * |
| quotearg_n_custom (int n, char const *left_quote, |
| char const *right_quote, char const *arg) |
| { |
| return quotearg_n_custom_mem (n, left_quote, right_quote, arg, |
| SIZE_MAX); |
| } |
| |
| char * |
| quotearg_n_custom_mem (int n, char const *left_quote, |
| char const *right_quote, |
| char const *arg, size_t argsize) |
| { |
| struct quoting_options o = default_quoting_options; |
| set_custom_quoting (&o, left_quote, right_quote); |
| return quotearg_n_options (n, arg, argsize, &o); |
| } |
| |
| char * |
| quotearg_custom (char const *left_quote, char const *right_quote, |
| char const *arg) |
| { |
| return quotearg_n_custom (0, left_quote, right_quote, arg); |
| } |
| |
| char * |
| quotearg_custom_mem (char const *left_quote, char const *right_quote, |
| char const *arg, size_t argsize) |
| { |
| return quotearg_n_custom_mem (0, left_quote, right_quote, arg, |
| argsize); |
| } |
| |
| |
| /* The quoting option used by the functions of quote.h. */ |
| struct quoting_options quote_quoting_options = |
| { |
| locale_quoting_style, |
| 0, |
| { 0 }, |
| NULL, NULL |
| }; |
| |
| char const * |
| quote_n_mem (int n, char const *arg, size_t argsize) |
| { |
| return quotearg_n_options (n, arg, argsize, "e_quoting_options); |
| } |
| |
| char const * |
| quote_mem (char const *arg, size_t argsize) |
| { |
| return quote_n_mem (0, arg, argsize); |
| } |
| |
| char const * |
| quote_n (int n, char const *arg) |
| { |
| return quote_n_mem (n, arg, SIZE_MAX); |
| } |
| |
| char const * |
| quote (char const *arg) |
| { |
| return quote_n (0, arg); |
| } |
