Support for C# format strings.

diff --git a/gettext-tools/src/format-csharp.c b/gettext-tools/src/format-csharp.c
new file mode 100644 (file)
index 0000000..f7f14f5
--- /dev/null
+++ b/gettext-tools/src/format-csharp.c
@@ -0,0 +1,288 @@
+/* C# format strings.
+   Copyright (C) 2003 Free Software Foundation, Inc.
+   Written by Bruno Haible <bruno@clisp.org>, 2003.
+
+   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 2, 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, write to the Free Software Foundation,
+   Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.  */
+
+#ifdef HAVE_CONFIG_H
+# include <config.h>
+#endif
+
+#include <stdbool.h>
+#include <stdlib.h>
+
+#include "format.h"
+#include "c-ctype.h"
+#include "xalloc.h"
+#include "xerror.h"
+#include "error.h"
+#include "error-progname.h"
+#include "gettext.h"
+
+#define _(str) gettext (str)
+
+/* C# format strings are described in the description of the .NET System.String
+   class and implemented in
+     pnetlib-0.5.6/runtime/System/String.cs
+   and
+     mcs-0.28/class/corlib/System/String.cs
+   A format string consists of literal text (that is output verbatim), doubled
+   braces ('{{' and '}}', that lead to a single brace when output), and
+   directives.
+   A directive
+   - starts with '{',
+   - is followed by a nonnegative integer m,
+   - is optionally followed by ',' and an integer denoting a width,
+   - is optionally followed by ':' and a sequence of format specifiers.
+     (But the interpretation of the format specifiers is up to the IFormattable
+     implementation, depending on the argument's runtime value. New classes
+     implementing IFormattable can be defined by the user.)
+   - is finished with '}'.
+ */
+
+struct spec
+{
+  unsigned int directives;
+  unsigned int numbered_arg_count;
+};
+
+static void *
+format_parse (const char *format, char **invalid_reason)
+{
+  struct spec spec;
+  struct spec *result;
+
+  spec.directives = 0;
+  spec.numbered_arg_count = 0;
+
+  for (; *format != '\0';)
+    {
+      char c = *format++;
+
+      if (c == '{')
+       {
+         if (*format == '{')
+           format++;
+         else
+           {
+             /* A directive.  */
+             unsigned int number;
+
+             spec.directives++;
+
+             if (!c_isdigit (*format))
+               {
+                 *invalid_reason =
+                   xasprintf (_("In the directive number %u, '{' is not followed by an argument number."), spec.directives);
+                 return NULL;
+               }
+             number = 0;
+             do
+               {
+                 number = 10 * number + (*format - '0');
+                 format++;
+               }
+             while (c_isdigit (*format));
+
+             if (*format == ',')
+               {
+                 /* Parse width.  */
+                 format++;
+                 if (*format == '-')
+                   format++;
+                 if (!c_isdigit (*format))
+                   {
+                     *invalid_reason =
+                       xasprintf (_("In the directive number %u, ',' is not followed by a number."), spec.directives);
+                     return NULL;
+                   }
+                 do
+                   format++;
+                 while (c_isdigit (*format));
+               }
+
+             if (*format == ':')
+               {
+                 /* Parse format specifiers.  */
+                 do
+                   format++;
+                 while (*format != '\0' && *format != '}');
+               }
+
+             if (*format == '\0')
+               {
+                 *invalid_reason =
+                   xstrdup (_("The string ends in the middle of a directive: found '{' without matching '}'."));
+                 return NULL;
+               }
+
+             if (*format != '}')
+               {
+                 *invalid_reason =
+                   (c_isprint (*format)
+                    ? xasprintf (_("The directive number %u ends with an invalid character '%c' instead of '}'."), spec.directives, *format)
+                    : xasprintf (_("The directive number %u ends with an invalid character instead of '}'."), spec.directives));
+                 return NULL;
+               }
+
+             format++;
+
+             if (spec.numbered_arg_count <= number)
+               spec.numbered_arg_count = number + 1;
+           }
+       }
+      else if (c == '}')
+       {
+         if (*format == '}')
+           format++;
+         else
+           {
+             *invalid_reason =
+               (spec.directives == 0
+                ? xstrdup (_("The string starts in the middle of a directive: found '}' without matching '{'."))
+                : xasprintf (_("The string contains a lone '}' after directive number %u."), spec.directives));
+             return NULL;
+           }
+       }
+    }
+
+  result = (struct spec *) xmalloc (sizeof (struct spec));
+  *result = spec;
+  return result;
+}
+
+static void
+format_free (void *descr)
+{
+  struct spec *spec = (struct spec *) descr;
+
+  free (spec);
+}
+
+static int
+format_get_number_of_directives (void *descr)
+{
+  struct spec *spec = (struct spec *) descr;
+
+  return spec->directives;
+}
+
+static bool
+format_check (const lex_pos_ty *pos, void *msgid_descr, void *msgstr_descr,
+             bool equality, bool noisy, const char *pretty_msgstr)
+{
+  struct spec *spec1 = (struct spec *) msgid_descr;
+  struct spec *spec2 = (struct spec *) msgstr_descr;
+  bool err = false;
+
+  /* Check that the argument counts are the same.  */
+  if (equality
+      ? spec1->numbered_arg_count != spec2->numbered_arg_count
+      : spec1->numbered_arg_count < spec2->numbered_arg_count)
+    {
+      if (noisy)
+       {
+         error_with_progname = false;
+         error_at_line (0, 0, pos->file_name, pos->line_number,
+                        _("number of format specifications in 'msgid' and '%s' does not match"),
+                        pretty_msgstr);
+         error_with_progname = true;
+       }
+      err = true;
+    }
+
+  return err;
+}
+
+
+struct formatstring_parser formatstring_csharp =
+{
+  format_parse,
+  format_free,
+  format_get_number_of_directives,
+  format_check
+};
+
+
+#ifdef TEST
+
+/* Test program: Print the argument list specification returned by
+   format_parse for strings read from standard input.  */
+
+#include <stdio.h>
+#include "getline.h"
+
+static void
+format_print (void *descr)
+{
+  struct spec *spec = (struct spec *) descr;
+  unsigned int i;
+
+  if (spec == NULL)
+    {
+      printf ("INVALID");
+      return;
+    }
+
+  printf ("(");
+  for (i = 0; i < spec->numbered_arg_count; i++)
+    {
+      if (i > 0)
+       printf (" ");
+      printf ("*");
+    }
+  printf (")");
+}
+
+int
+main ()
+{
+  for (;;)
+    {
+      char *line = NULL;
+      size_t line_size = 0;
+      int line_len;
+      char *invalid_reason;
+      void *descr;
+
+      line_len = getline (&line, &line_size, stdin);
+      if (line_len < 0)
+       break;
+      if (line_len > 0 && line[line_len - 1] == '\n')
+       line[--line_len] = '\0';
+
+      invalid_reason = NULL;
+      descr = format_parse (line, &invalid_reason);
+
+      format_print (descr);
+      printf ("\n");
+      if (descr == NULL)
+       printf ("%s\n", invalid_reason);
+
+      free (invalid_reason);
+      free (line);
+    }
+
+  return 0;
+}
+
+/*
+ * For Emacs M-x compile
+ * Local Variables:
+ * compile-command: "/bin/sh ../libtool --mode=link gcc -o a.out -static -O -g -Wall -I.. -I../lib -I../intl -DHAVE_CONFIG_H -DTEST format-csharp.c ../lib/libgettextlib.la"
+ * End:
+ */
+
+#endif /* TEST */