plus_equal_scalar.rar_plus

/* quotearg.c - quote arguments for output Copyright (C) 1998, 1999, 2000, 2001, 2002, 2004, 2005, 2006, 2007, 2008 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> */ #include <config.h> #include "quotearg.h" #include "xalloc.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]; }; /* 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; } /* Return quoting options for STYLE, with no extra quoting. */ static struct quoting_options quoting_options_from_style (enum quoting_style style) { struct quoting_options o; o.style = style; o.flags = 0; memset (o.quote_these_too, 0, sizeof o.quote_these_too); return o; } /* MSGID approximates a quotation mark. Return its translation if it has one; otherwise, return either it or "\"", depending on S. */ static char const * gettext_quote (char const *msgid, enum quoting_style s) { char const *translation = _(msgid); if (translation == msgid && s == clocale_quoting_style) translation = "\""; return translation; } /* 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) { 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: { /* 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 "'". If the catalog has no translation, locale_quoting_style quotes `like this', and clocale_quoting_style quotes "like this". For example, an American English Unicode locale should translate "`" to U+201C (LEFT DOUBLE QUOTATION MARK), and should translate "'" to U+201D (RIGHT DOUBLE QUOTATION MARK). A British English Unicode locale should instead translate these to U+2018 (LEFT SINGLE QUOTATION MARK) and U+2019 (RIGHT SINGLE QUOTATION MARK), respectively. If you don't know what to put here, please see <http://en.wikipedia.org/wiki/Quotation_mark#Glyphs> and use glyphs suitable for your language. */ char const *left = gettext_quote (N_("`"), quoting_style); char const *right = gettext_quote (N_("'"), quoting_style); if (!elide_outer_quotes) for (quote_string = left; *quote_string; quote_string++) STORE (*quote_string); backslash_escapes = true; quote_string = right; 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 (); } f