merge from gcc

diff --git a/libiberty/ChangeLog b/libiberty/ChangeLog
index 1b3a44c4a2e9ddcf246a6c10b87e8df8ca71fde7..05e594e7cf0e9e4e5ddb220f8a7ee2b6c65bd2aa 100644 (file)
--- a/libiberty/ChangeLog
+++ b/libiberty/ChangeLog
@@ -1,3 +1,17 @@
+2009-10-08  Daniel Gutson  <dgutson@codesourcery.com>
+       Daniel Jacobowitz  <dan@codesourcery.com>
+       Pedro Alves  <pedro@codesourcery.com>
+
+       libiberty/
+       * argv.c (consume_whitespace): New function.
+       (only_whitespace): New function.
+       (buildargv): Always use ISSPACE by calling consume_whitespace.
+       (expandargv): Skip empty files.  Do not stop at the first empty
+       argument (calling only_whitespace)..
+       * testsuite/test-expandargv.c: (test_data): Test empty lines
+       and empty arguments.
+       (run_tests): Fix false positives due to shorter arguments.
+
 2009-09-30  Martin Thuresson  <martint@google.com>
 
        * regex.c (byte_re_match_2_internal): Split declaration and

diff --git a/libiberty/argv.c b/libiberty/argv.c
index 38bd4497090b6cb5ad56004b87ba24cd6c866459..3084248b96cabd54c7606498cbaa5075873e6394 100644 (file)
--- a/libiberty/argv.c
+++ b/libiberty/argv.c
@@ -119,6 +119,24 @@ void freeargv (char **vector)
     }
 }
 
+static void
+consume_whitespace (const char **input)
+{
+  while (ISSPACE (**input))
+    {
+      (*input)++;
+    }
+}
+
+static int
+only_whitespace (const char* input)
+{
+  while (*input != EOS && ISSPACE (*input))
+    input++;
+
+  return (*input == EOS);
+}
+
 /*
 
 @deftypefn Extension char** buildargv (char *@var{sp})
@@ -179,10 +197,8 @@ char **buildargv (const char *input)
       do
        {
          /* Pick off argv[argc] */
-         while (ISBLANK (*input))
-           {
-             input++;
-           }
+         consume_whitespace (&input);
+
          if ((maxargc == 0) || (argc >= (maxargc - 1)))
            {
              /* argv needs initialization, or expansion */
@@ -278,10 +294,7 @@ char **buildargv (const char *input)
          argc++;
          argv[argc] = NULL;
 
-         while (ISSPACE (*input))
-           {
-             input++;
-           }
+         consume_whitespace (&input);
        }
       while (*input != EOS);
     }
@@ -420,8 +433,17 @@ expandargv (int *argcp, char ***argvp)
        goto error;
       /* Add a NUL terminator.  */
       buffer[len] = '\0';
-      /* Parse the string.  */
-      file_argv = buildargv (buffer);
+      /* If the file is empty or contains only whitespace, buildargv would
+        return a single empty argument.  In this context we want no arguments,
+        instead.  */
+      if (only_whitespace (buffer))
+       {
+         file_argv = (char **) xmalloc (sizeof (char *));
+         file_argv[0] = NULL;
+       }
+      else
+       /* Parse the string.  */
+       file_argv = buildargv (buffer);
       /* If *ARGVP is not already dynamically allocated, copy it.  */
       if (!argv_dynamic)
        {
@@ -434,7 +456,7 @@ expandargv (int *argcp, char ***argvp)
        }
       /* Count the number of arguments.  */
       file_argc = 0;
-      while (file_argv[file_argc] && *file_argv[file_argc])
+      while (file_argv[file_argc])
        ++file_argc;
       /* Now, insert FILE_ARGV into ARGV.  The "+1" below handles the
         NULL terminator at the end of ARGV.  */ 

diff --git a/libiberty/testsuite/test-expandargv.c b/libiberty/testsuite/test-expandargv.c
index 9d1af01454598941576e67123e15c16cc5c2f465..c16a0322a6c4b20ba77604f686e7cfd38a225d95 100644 (file)
--- a/libiberty/testsuite/test-expandargv.c
+++ b/libiberty/testsuite/test-expandargv.c
@@ -107,6 +107,38 @@ const char *test_data[] = {
   ARGV0,
   0,
 
+  /* Test 4 - Check for options beginning with an empty line.  */
+  "\na\nb",    /* Test 4 data */
+  ARGV0,
+  "@test-expandargv-4.lst",
+  0,
+  ARGV0,
+  "a",
+  "b",
+  0,
+
+  /* Test 5 - Check for options containing an empty argument.  */
+  "a\n''\nb",    /* Test 5 data */
+  ARGV0,
+  "@test-expandargv-5.lst",
+  0,
+  ARGV0,
+  "a",
+  "",
+  "b",
+  0,
+
+  /* Test 6 - Check for options containing a quoted newline.  */
+  "a\n'a\n\nb'\nb",    /* Test 6 data */
+  ARGV0,
+  "@test-expandargv-6.lst",
+  0,
+  ARGV0,
+  "a",
+  "a\n\nb",
+  "b",
+  0,
+
   0 /* Test done marker, don't remove. */
 };
 
@@ -246,7 +278,7 @@ run_tests (const char **test_data)
       /* Compare each of the argv's ... */
       else
         for (k = 0; k < argc_after; k++)
-          if (strncmp (argv_before[k], argv_after[k], strlen(argv_after[k])) != 0)
+          if (strcmp (argv_before[k], argv_after[k]) != 0)
             {
               printf ("FAIL: test-expandargv-%d. Arguments don't match.\n", i);
               failed++;