X-Git-Url: https://pintos-os.org/cgi-bin/gitweb.cgi?a=blobdiff_plain;f=src%2Flanguage%2Flexer%2Flexer.c;h=e72a3e47bc9637d93ad3c1f764b7099686df6d3d;hb=2c043e1bf0d36ae7b3900bf3c2b98196f67d5b7d;hp=e3725681c9c6a207332987046e5e9bee721008ee;hpb=f7e9711f020ba507719f1f21cac04ae1199a4ac0;p=pspp

diff --git a/src/language/lexer/lexer.c b/src/language/lexer/lexer.c
index e3725681c9..e72a3e47bc 100644
--- a/src/language/lexer/lexer.c
+++ b/src/language/lexer/lexer.c
@@ -362,6 +362,24 @@ lex_sbc_missing (const char *sbc)
   msg (SE, _("Required subcommand %s was not specified."), sbc);
 }
 
+/* Reports an error to the effect that specification SPEC may only be specified
+   once within subcommand SBC. */
+void
+lex_spec_only_once (struct lexer *lexer, const char *sbc, const char *spec)
+{
+  lex_error (lexer, _("%s may only be specified once within subcommand %s"),
+             spec, sbc);
+}
+
+/* Reports an error to the effect that specification SPEC is missing within
+   subcommand SBC. */
+void
+lex_spec_missing (struct lexer *lexer, const char *sbc, const char *spec)
+{
+  lex_error (lexer, _("Required %s specification missing from %s subcommand"),
+             sbc, spec);
+}
+
 /* Prints a syntax error message containing the current token and
    given message MESSAGE (if non-null). */
 void
@@ -607,6 +625,21 @@ lex_force_string (struct lexer *lexer)
     }
 }
 
+/* If the current token is a string or an identifier, does nothing and returns
+   true.  Otherwise, reports an error and returns false.
+
+   This is meant for use in syntactic situations where we want to encourage the
+   user to supply a quoted string, but for compatibility we also accept
+   identifiers.  (One example of such a situation is file names.)  Therefore,
+   the error message issued when the current token is wrong only says that a
+   string is expected and doesn't mention that an identifier would also be
+   accepted. */
+bool
+lex_force_string_or_id (struct lexer *lexer)
+{
+  return lex_is_integer (lexer) || lex_force_string (lexer);
+}
+
 /* If the current token is an integer, does nothing and returns true.
    Otherwise, reports an error and returns false. */
 bool