vasilito
facf0c92e0
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291 lines
8.0 KiB
C
291 lines
8.0 KiB
C
/* C# format strings.
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Copyright (C) 2003-2004, 2006-2007, 2009, 2018-2019 Free Software Foundation, Inc.
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Written by Bruno Haible <bruno@clisp.org>, 2003.
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This program is free software: you can redistribute it and/or modify
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it under the terms of the GNU General Public License as published by
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the Free Software Foundation; either version 3 of the License, or
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(at your option) any later version.
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This program is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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GNU General Public License for more details.
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You should have received a copy of the GNU General Public License
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along with this program. If not, see <https://www.gnu.org/licenses/>. */
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#ifdef HAVE_CONFIG_H
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# include <config.h>
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#endif
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#include <stdbool.h>
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#include <stdlib.h>
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#include "format.h"
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#include "c-ctype.h"
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#include "xalloc.h"
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#include "xvasprintf.h"
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#include "gettext.h"
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#define _(str) gettext (str)
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/* C# format strings are described in the description of the .NET System.String
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class and implemented in mcs-0.28/class/corlib/System/String.cs .
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A format string consists of literal text (that is output verbatim), doubled
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braces ('{{' and '}}', that lead to a single brace when output), and
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directives.
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A directive
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- starts with '{',
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- is followed by a nonnegative integer m,
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- is optionally followed by ',' and an integer denoting a width,
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- is optionally followed by ':' and a sequence of format specifiers.
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(But the interpretation of the format specifiers is up to the IFormattable
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implementation, depending on the argument's runtime value. New classes
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implementing IFormattable can be defined by the user.)
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- is finished with '}'.
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*/
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struct spec
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{
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unsigned int directives;
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unsigned int numbered_arg_count;
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};
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static void *
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format_parse (const char *format, bool translated, char *fdi,
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char **invalid_reason)
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{
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const char *const format_start = format;
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struct spec spec;
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struct spec *result;
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spec.directives = 0;
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spec.numbered_arg_count = 0;
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for (; *format != '\0';)
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{
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char c = *format++;
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if (c == '{')
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{
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FDI_SET (format - 1, FMTDIR_START);
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if (*format == '{')
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format++;
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else
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{
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/* A directive. */
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unsigned int number;
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spec.directives++;
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if (!c_isdigit (*format))
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{
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*invalid_reason =
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xasprintf (_("In the directive number %u, '{' is not followed by an argument number."), spec.directives);
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FDI_SET (*format == '\0' ? format - 1 : format, FMTDIR_ERROR);
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return NULL;
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}
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number = 0;
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do
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{
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number = 10 * number + (*format - '0');
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format++;
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}
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while (c_isdigit (*format));
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if (*format == ',')
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{
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/* Parse width. */
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format++;
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if (*format == '-')
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format++;
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if (!c_isdigit (*format))
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{
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*invalid_reason =
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xasprintf (_("In the directive number %u, ',' is not followed by a number."), spec.directives);
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FDI_SET (*format == '\0' ? format - 1 : format,
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FMTDIR_ERROR);
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return NULL;
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}
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do
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format++;
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while (c_isdigit (*format));
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}
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if (*format == ':')
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{
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/* Parse format specifiers. */
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do
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format++;
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while (*format != '\0' && *format != '}');
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}
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if (*format == '\0')
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{
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*invalid_reason =
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xstrdup (_("The string ends in the middle of a directive: found '{' without matching '}'."));
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FDI_SET (format - 1, FMTDIR_ERROR);
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return NULL;
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}
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if (*format != '}')
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{
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*invalid_reason =
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(c_isprint (*format)
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? xasprintf (_("The directive number %u ends with an invalid character '%c' instead of '}'."), spec.directives, *format)
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: xasprintf (_("The directive number %u ends with an invalid character instead of '}'."), spec.directives));
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FDI_SET (format, FMTDIR_ERROR);
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return NULL;
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}
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format++;
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if (spec.numbered_arg_count <= number)
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spec.numbered_arg_count = number + 1;
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}
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FDI_SET (format - 1, FMTDIR_END);
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}
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else if (c == '}')
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{
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FDI_SET (format - 1, FMTDIR_START);
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if (*format == '}')
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format++;
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else
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{
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*invalid_reason =
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(spec.directives == 0
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? xstrdup (_("The string starts in the middle of a directive: found '}' without matching '{'."))
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: xasprintf (_("The string contains a lone '}' after directive number %u."), spec.directives));
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FDI_SET (*format == '\0' ? format - 1 : format, FMTDIR_ERROR);
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return NULL;
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}
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FDI_SET (format - 1, FMTDIR_END);
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}
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}
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result = XMALLOC (struct spec);
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*result = spec;
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return result;
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}
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static void
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format_free (void *descr)
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{
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struct spec *spec = (struct spec *) descr;
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free (spec);
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}
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static int
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format_get_number_of_directives (void *descr)
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{
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struct spec *spec = (struct spec *) descr;
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return spec->directives;
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}
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static bool
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format_check (void *msgid_descr, void *msgstr_descr, bool equality,
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formatstring_error_logger_t error_logger,
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const char *pretty_msgid, const char *pretty_msgstr)
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{
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struct spec *spec1 = (struct spec *) msgid_descr;
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struct spec *spec2 = (struct spec *) msgstr_descr;
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bool err = false;
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/* Check that the argument counts are the same. */
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if (equality
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? spec1->numbered_arg_count != spec2->numbered_arg_count
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: spec1->numbered_arg_count < spec2->numbered_arg_count)
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{
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if (error_logger)
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error_logger (_("number of format specifications in '%s' and '%s' does not match"),
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pretty_msgid, pretty_msgstr);
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err = true;
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}
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return err;
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}
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struct formatstring_parser formatstring_csharp =
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{
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format_parse,
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format_free,
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format_get_number_of_directives,
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NULL,
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format_check
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};
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#ifdef TEST
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/* Test program: Print the argument list specification returned by
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format_parse for strings read from standard input. */
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#include <stdio.h>
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static void
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format_print (void *descr)
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{
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struct spec *spec = (struct spec *) descr;
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unsigned int i;
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if (spec == NULL)
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{
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printf ("INVALID");
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return;
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}
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printf ("(");
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for (i = 0; i < spec->numbered_arg_count; i++)
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{
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if (i > 0)
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printf (" ");
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printf ("*");
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}
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printf (")");
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}
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int
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main ()
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{
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for (;;)
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{
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char *line = NULL;
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size_t line_size = 0;
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int line_len;
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char *invalid_reason;
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void *descr;
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line_len = getline (&line, &line_size, stdin);
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if (line_len < 0)
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break;
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if (line_len > 0 && line[line_len - 1] == '\n')
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line[--line_len] = '\0';
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invalid_reason = NULL;
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descr = format_parse (line, false, NULL, &invalid_reason);
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format_print (descr);
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printf ("\n");
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if (descr == NULL)
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printf ("%s\n", invalid_reason);
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free (invalid_reason);
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free (line);
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}
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return 0;
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}
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/*
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* For Emacs M-x compile
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* Local Variables:
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* compile-command: "/bin/sh ../libtool --tag=CC --mode=link gcc -o a.out -static -O -g -Wall -I.. -I../gnulib-lib -I../../gettext-runtime/intl -DHAVE_CONFIG_H -DTEST format-csharp.c ../gnulib-lib/libgettextlib.la"
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* End:
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*/
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#endif /* TEST */
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