cpplex.c: Fix trigraph replacement within strings.

	* cpplex.c: Fix trigraph replacement within strings.
	* gcc.dg/cpp/lexident.c, gcc.dg/cpp/lexnum.c,
	  gcc.dg/cpp/lexstrng.c: New tests.

From-SVN: r34868

1 files changed, 69 insertions, 0 deletions

diff --git a/gcc/testsuite/gcc.dg/cpp/lexstrng.c b/gcc/testsuite/gcc.dg/cpp/lexstrng.c
new file mode 100644
index 0000000..4fbb3b5
--- /dev/null
+++ b/gcc/testsuite/gcc.dg/cpp/lexstrng.c
@@ -0,0 +1,69 @@
+/* Copyright (C) 2000 Free Software Foundation, Inc.  */
+
+/* { dg-do run } */
+/* { dg-options "-trigraphs" } */
+
+/* Test lexing of strings and character constants.  */
+
+#include <string.h>
+
+#ifndef __WCHAR_TYPE__
+#define __WCHAR_TYPE__ int
+#endif
+typedef __WCHAR_TYPE__ wchar_t;
+
+extern int strcmp (const char *, const char *);
+extern int puts (const char *);
+extern void abort (void);
+#define err(str) do { puts(str); abort(); } while (0)
+
+/* Escaped newlines.  */
+const char *str1 = "s\
+t\
+\
+r??/
+  1";
+
+const char x = '\
+??/
+b';
+
+/* Test escaped terminators.  */
+const char *term = "\"\\\"\\";
+const char termc = '\'';
+const char *terms = "'";
+
+/* Test wide strings and chars are lexed.  */
+const wchar_t wchar = L'w';
+const wchar_t* wstring = L"wide string";
+
+/* Test all 9 trigraphs embedded in a string.  Test trigraphs do not
+   survive an embedded backslash newline.  Test trigraphs preceded by
+   a '?' are still noticed.  */
+const char *t = "??/\??<??>??=??)??\
+(??(??!??'??-???=???/
+?-";
+
+int main (int argc, char *argv[])
+{
+  if (strcmp (str1, "str  1"))
+    err ("str1");
+
+  if (x != 'b')
+    err ("b");
+
+  /* We have to split the string up to avoid trigraph replacement
+     here.  Split the 2 trigraphs after both 1 and 2 ?s; just doing
+     this exposed a bug in the initial release of the tokenized lexer.  */
+  if (strcmp (t, "\\{}#]?" "?([|^~?#??" "-"))
+    err ("Embedded trigraphs");
+
+  if (term[0] != '"' || term[1] != '\\' || term[2] != '"'
+      || term[3] != '\\' || term[4] != '\0')
+    err ("Escaped string terminators");
+
+  if (termc != terms[0])
+    err ("Escaped character constant terminator");
+
+  return 0;
+}