[hackers] [scc] [cc1] Fix comments across several files || Roberto E. Vargas Caballero

[git]

commit 60560f4989f5e451ab2d1ad96bc6ebcab6337017
Author:     Roberto E. Vargas Caballero <k...@shike2.com>
AuthorDate: Wed Jun 22 09:07:00 2016 +0200
Commit:     Roberto E. Vargas Caballero <k...@shike2.com>
CommitDate: Wed Jun 22 09:07:00 2016 +0200

    [cc1] Fix comments across several files
    
    If a comment finishes before of the end of its file then
    we have to continue from the previous file, and give
    a message error when we arrive to the end of the base
    file.

diff --git a/cc1/lex.c b/cc1/lex.c
index 84b691e..6f89352 100644
--- a/cc1/lex.c
+++ b/cc1/lex.c
@@ -127,13 +127,15 @@ newline(void)
                die("error: input file '%s' too long", input->fname);
 }
 
-static char
+static int
 readchar(void)
 {
        int c;
        FILE *fp;
 
 repeat:
+       if (eof)
+               return 0;
        fp = input->fp;
 
        switch (c = getc(fp)) {
@@ -157,21 +159,24 @@ repeat:
 }
 
 static void
-comment(char type)
+comment(int type)
 {
-       if (type == '*') {
-               while (!eof) {
-                       while (readchar() != '*' && !eof)
-                               /* nothing */;
-                       if (readchar() == '/')
-                               break;
-               }
-       } else {
-               while (readchar() != '\n' && !eof)
-                       /* nothing */;
+       int c;
+
+       c = -1;
+repeat:
+       do {
+               if (!c)
+                       delinput();
+       } while (!eof && (c = readchar()) != type);
+
+       if (eof) {
+               errorp("unterminated comment");
+               return;
        }
-       if (eof)
-               error("unterminated comment");
+
+       if (type == '*' && (c = readchar()) != '/')
+               goto repeat;
 }
 
 static int
@@ -201,6 +206,8 @@ repeat:
                        peekc = c;
                        c = '/';
                } else {
+                       if (c == '/')
+                               c = '\n';
                        comment(c);
                        c = ' ';
                }
diff --git a/cc1/tests/test063.c b/cc1/tests/test063.c
new file mode 100644
index 0000000..b4d7f28
--- /dev/null
+++ b/cc1/tests/test063.c
@@ -0,0 +1,12 @@
+/* See LICENSE file for copyright and license details. */
+
+/*
+name: TEST063
+description: Test a comment that goes beyond of the end of an included file
+error:
+test063.c:12: error: unterminated comment
+test063.c:12: error: #endif expected
+output:
+*/
+
+#include "test063.h"
diff --git a/cc1/tests/test063.h b/cc1/tests/test063.h
new file mode 100644
index 0000000..3ec5025
--- /dev/null
+++ b/cc1/tests/test063.h
@@ -0,0 +1,9 @@
+
+#ifndef TEST_H_
+#define TEST_H_
+
+/*
+ This is an unterminated comment.
+
+
+#endif