1 files changed, 294 insertions, 0 deletions
diff --git a/gettext-tools/src/format-perl-brace.c b/gettext-tools/src/format-perl-brace.c
new file mode 100644
index 0000000..3ab05ce
--- /dev/null
+++ b/gettext-tools/src/format-perl-brace.c
@@ -0,0 +1,294 @@
+/* Perl brace format strings.
+   Copyright (C) 2004, 2006-2007 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 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/>.  */
+
+#ifdef HAVE_CONFIG_H
+# include <config.h>
+#endif
+
+#include <stdbool.h>
+#include <stdlib.h>
+#include <string.h>
+
+#include "format.h"
+#include "xalloc.h"
+#include "gettext.h"
+
+#define _(str) gettext (str)
+
+/* Perl brace format strings are supported by Guido Flohr's libintl-perl
+   package, more precisely by the __expand and __x functions therein.
+   A format string directive here consists of
+     - an opening brace '{',
+     - an identifier [_A-Za-z][_0-9A-Za-z]*,
+     - a closing brace '}'.
+ */
+
+struct named_arg
+{
+  char *name;
+};
+
+struct spec
+{
+  unsigned int directives;
+  unsigned int named_arg_count;
+  unsigned int allocated;
+  struct named_arg *named;
+};
+
+
+static int
+named_arg_compare (const void *p1, const void *p2)
+{
+  return strcmp (((const struct named_arg *) p1)->name,
+                 ((const struct named_arg *) p2)->name);
+}
+
+static void *
+format_parse (const char *format, bool translated, char *fdi,
+              char **invalid_reason)
+{
+  const char *const format_start = format;
+  struct spec spec;
+  struct spec *result;
+
+  spec.directives = 0;
+  spec.named_arg_count = 0;
+  spec.allocated = 0;
+  spec.named = NULL;
+
+  for (; *format != '\0';)
+    if (*format++ == '{')
+      {
+        const char *f = format;
+        char c;
+
+        c = *f;
+        if ((c >= 'A' && c <= 'Z') || (c >= 'a' && c <= 'z') || c == '_')
+          {
+            do
+              c = *++f;
+            while ((c >= 'A' && c <= 'Z') || (c >= 'a' && c <= 'z') || c == '_'
+                   || (c >= '0' && c <= '9'));
+            if (c == '}')
+              {
+                /* A directive.  */
+                char *name;
+                const char *name_start = format;
+                const char *name_end = f;
+                size_t n = name_end - name_start;
+
+                FDI_SET (format - 1, FMTDIR_START);
+
+                name = XNMALLOC (n + 1, char);
+                memcpy (name, name_start, n);
+                name[n] = '\0';
+
+                spec.directives++;
+
+                if (spec.allocated == spec.named_arg_count)
+                  {
+                    spec.allocated = 2 * spec.allocated + 1;
+                    spec.named = (struct named_arg *) xrealloc (spec.named, spec.allocated * sizeof (struct named_arg));
+                  }
+                spec.named[spec.named_arg_count].name = name;
+                spec.named_arg_count++;
+
+                FDI_SET (f, FMTDIR_END);
+
+                format = ++f;
+              }
+          }
+      }
+
+  /* Sort the named argument array, and eliminate duplicates.  */
+  if (spec.named_arg_count > 1)
+    {
+      unsigned int i, j;
+
+      qsort (spec.named, spec.named_arg_count, sizeof (struct named_arg),
+             named_arg_compare);
+
+      /* Remove duplicates: Copy from i to j, keeping 0 <= j <= i.  */
+      for (i = j = 0; i < spec.named_arg_count; i++)
+        if (j > 0 && strcmp (spec.named[i].name, spec.named[j-1].name) == 0)
+          free (spec.named[i].name);
+        else
+          {
+            if (j < i)
+              spec.named[j].name = spec.named[i].name;
+            j++;
+          }
+      spec.named_arg_count = j;
+    }
+
+  result = XMALLOC (struct spec);
+  *result = spec;
+  return result;
+}
+
+static void
+format_free (void *descr)
+{
+  struct spec *spec = (struct spec *) descr;
+
+  if (spec->named != NULL)
+    {
+      unsigned int i;
+      for (i = 0; i < spec->named_arg_count; i++)
+        free (spec->named[i].name);
+      free (spec->named);
+    }
+  free (spec);
+}
+
+static int
+format_get_number_of_directives (void *descr)
+{
+  struct spec *spec = (struct spec *) descr;
+
+  return spec->directives;
+}
+
+static bool
+format_check (void *msgid_descr, void *msgstr_descr, bool equality,
+              formatstring_error_logger_t error_logger,
+              const char *pretty_msgid, const char *pretty_msgstr)
+{
+  struct spec *spec1 = (struct spec *) msgid_descr;
+  struct spec *spec2 = (struct spec *) msgstr_descr;
+  bool err = false;
+
+  if (spec1->named_arg_count + spec2->named_arg_count > 0)
+    {
+      unsigned int i, j;
+      unsigned int n1 = spec1->named_arg_count;
+      unsigned int n2 = spec2->named_arg_count;
+
+      /* Check the argument names in spec1 are contained in those of spec2.
+         Additional arguments in spec2 are allowed; they expand to themselves
+         (including the surrounding braces) at runtime.
+         Both arrays are sorted.  We search for the differences.  */
+      for (i = 0, j = 0; i < n1 || j < n2; )
+        {
+          int cmp = (i >= n1 ? 1 :
+                     j >= n2 ? -1 :
+                     strcmp (spec1->named[i].name, spec2->named[j].name));
+
+          if (cmp > 0)
+            j++;
+          else if (cmp < 0)
+            {
+              if (equality)
+                {
+                  if (error_logger)
+                    error_logger (_("a format specification for argument '%s' doesn't exist in '%s'"),
+                                  spec1->named[i].name, pretty_msgstr);
+                  err = true;
+                  break;
+                }
+              else
+                i++;
+            }
+          else
+            j++, i++;
+        }
+    }
+
+  return err;
+}
+
+
+struct formatstring_parser formatstring_perl_brace =
+{
+  format_parse,
+  format_free,
+  format_get_number_of_directives,
+  NULL,
+  format_check
+};
+
+
+#ifdef TEST
+
+/* Test program: Print the argument list specification returned by
+   format_parse for strings read from standard input.  */
+
+#include <stdio.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->named_arg_count; i++)
+    {
+      if (i > 0)
+        printf (", ");
+      printf ("'%s'", spec->named[i].name);
+    }
+  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, false, NULL, &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 --tag=CC --mode=link gcc -o a.out -static -O -g -Wall -I.. -I../gnulib-lib -I../intl -DHAVE_CONFIG_H -DTEST format-perl-brace.c ../gnulib-lib/libgettextlib.la"
+ * End:
+ */
+
+#endif /* TEST */