New upstream version 1.3upstream/1.3upstream

1 files changed, 189 insertions, 0 deletions

diff --git a/tests/unilbrk/test-uc-possible-linebreaks.c b/tests/unilbrk/test-uc-possible-linebreaks.c
new file mode 100644
index 00000000..31bab9eb
--- /dev/null
+++ b/tests/unilbrk/test-uc-possible-linebreaks.c
@@ -0,0 +1,189 @@
+/* Line break function test, using test data from UCD.
+   Copyright (C) 2024 Free Software Foundation, Inc.
+
+   This file 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 file 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 <https://www.gnu.org/licenses/>.  */
+
+/* Written by Bruno Haible <bruno@clisp.org>, 2024.  */
+
+#include <config.h>
+
+/* Specification. */
+#include <unilbrk.h>
+
+#include <stdio.h>
+#include <stdlib.h>
+#include <string.h>
+
+int
+main (int argc, char *argv[])
+{
+  const char *filename;
+  FILE *stream;
+  int exit_code;
+  int lineno;
+  char line[16384];
+
+  if (argc != 2)
+    {
+      fprintf (stderr, "usage: %s FILENAME\n"
+               "where FILENAME is the location of the LineBreakTest.txt test file.\n",
+               argv[0]);
+      exit (1);
+    }
+
+  filename = argv[1];
+  stream = fopen (filename, "r");
+  if (stream == NULL)
+    {
+      fprintf (stderr, "error during fopen of '%s'\n", filename);
+      exit (1);
+    }
+
+  exit_code = 0;
+  lineno = 0;
+  while (fgets (line, sizeof (line), stream))
+    {
+      lineno++;
+
+      /* Cut off the trailing comment, if any.  */
+      char *comment = strchr (line, '#');
+      if (comment != NULL)
+        *comment = '\0';
+      /* Is the remaining line blank?  */
+      if (line[strspn (line, " \t\r\n")] == '\0')
+        continue;
+
+      const char *p;
+      uint32_t input[1024];
+      char breaks[1024];
+      char breaks_expected[1025];
+      int i;
+
+      i = 0;
+      p = line;
+      do
+        {
+          p += strspn (p, " \t\r\n");
+          if (!strncmp (p, "\303\267" /* ÷ */, 2))
+            {
+              breaks_expected[i] = 1;
+              p += 2;
+            }
+          else if (!strncmp (p, "\303\227" /* × */, 2))
+            {
+              breaks_expected[i] = 0;
+              p += 2;
+            }
+          else
+            {
+              fprintf (stderr, "%s:%d.%d: syntax error expecting '÷' or '×'\n",
+                       filename, lineno, (int) (p - line + 1));
+              exit (1);
+            }
+
+          p += strspn (p, " \t\r\n");
+          if (*p != '\0')
+            {
+              unsigned int next_int;
+              int n;
+
+              if (sscanf (p, "%x%n", &next_int, &n) != 1)
+                {
+                  fprintf (stderr, "%s:%d.%d: syntax error at '%s' "
+                           "expecting hexadecimal Unicode code point number\n",
+                           filename, lineno, (int) (p - line + 1), p);
+                  exit (1);
+                }
+              p += n;
+
+              input[i] = next_int;
+            }
+
+          p += strspn (p, " \t\r\n");
+          i++;
+        }
+      while (*p != '\0');
+
+      u32_possible_linebreaks (input, i - 1, "UTF-8", breaks);
+
+      int matches = 1;
+      {
+        int j;
+        for (j = 0; j < i - 1; j++)
+          {
+            /* The character U+FFFC has line break property CB, which according
+               to rule (LB1) is resolved "into other line breaking classes
+               depending on criteria outside the scope of this algorithm".
+               Thus it makes no sense to check the breaks[] entry before or
+               after such a character.  */
+            if (!(input[j] == 0xFFFC
+                  || (j > 0 && input[j - 1] == 0xFFFC)
+                  /* Also consider intervening characters with property LBP_CM
+                     or LBP_ZWJ, per (LB9).  */
+                  || (j > 1 && (input[j - 1] == 0x0308 || input[j - 1] == 0x200D)
+                      && input[j - 2] == 0xFFFC)))
+              /* A regional indicator with a combining character is nonsense,
+                 because regional indicators are supposed to come in pairs.  */
+              if (!(j >= 2 && (input[0] >= 0x1F1E6 && input[0] <= 0x1F1FF)
+                    && input[1] == 0x0308))
+                /* There is a disagreement regarding whether to allow a line break
+                   after a U+0020 SPACE character at the start of the text.
+                   We consider that the start of the text is equivalent to the
+                   state after a newline was seen; hence the loop starts with
+                   property LBP_BK.  By the rules (LB4,LB5,LB6) an extra line
+                   break after a mandatory line break is undesired, even with
+                   intervening spaces (because these rules come before (LB18)).
+                   Whereas the LineBreakTest.txt file allows a line break after
+                   the space.
+                   Similarly when the first two characters at the start of the
+                   text have property LBP_CM and LBP_ZWJ, respectively. (LB9).  */
+                if (!(((j == 1 || (j > 1 && ((input[j - 2] >= 0x000A && input[j - 2] <= 0x000D) || input[j - 2] == 0x0085)))
+                       && input[j - 1] == 0x0020)
+                      || ((j == 2 || (j > 2 && ((input[j - 3] >= 0x000A && input[j - 3] <= 0x000D) || input[j - 3] == 0x0085)))
+                          && ((input[j - 2] == 0x0020 && input[j - 1] == 0x0020)
+                              || (input[j - 2] == 0x0308 && input[j - 1] == 0x200D)
+                              || (input[j - 2] == 0x200D && input[j - 1] == 0x0308)))))
+                  matches &= (!(breaks[j] == UC_BREAK_PROHIBITED
+                                || breaks[j] == UC_BREAK_MANDATORY
+                                || breaks[j] == UC_BREAK_CR_BEFORE_LF)
+                              || (j > 0 && breaks[j - 1] == UC_BREAK_MANDATORY))
+                             == breaks_expected[j];
+          }
+      }
+      if (!matches)
+        {
+          int j;
+
+          fprintf (stderr, "%s:%d: expected: ", filename, lineno);
+          for (j = 0; j < i - 1; j++)
+            fprintf (stderr, "%s U+%04X ",
+                     breaks_expected[j] == 1 ? "\303\267" : "\303\227",
+                     input[j]);
+          fprintf (stderr, "\n");
+          fprintf (stderr, "%s:%d: actual:   ", filename, lineno);
+          for (j = 0; j < i - 1; j++)
+            fprintf (stderr, "%s U+%04X ",
+                     (!(breaks[j] == UC_BREAK_PROHIBITED
+                        || breaks[j] == UC_BREAK_MANDATORY
+                        || breaks[j] == UC_BREAK_CR_BEFORE_LF)
+                      || (j > 0 && breaks[j - 1] == UC_BREAK_MANDATORY))
+                     ? "\303\267" : "\303\227",
+                     input[j]);
+          fprintf (stderr, "\n");
+          exit_code = 1;
+        }
+    }
+
+  return exit_code;
+}