From 1c67dd553c547d330c2a248d29a359f946915a2f Mon Sep 17 00:00:00 2001
From: Jose Antonio Ortega Ruiz <jao@gnu.org>
Date: Tue, 20 Sep 2005 00:26:00 +0000
Subject: Sergey Poznyakoff's patches improving MIXAL compliance.

---
 mixlib/mix_scanner.l | 58 +++++++++++++++++++++++++++++++++++++---------------
 1 file changed, 41 insertions(+), 17 deletions(-)

(limited to 'mixlib/mix_scanner.l')

diff --git a/mixlib/mix_scanner.l b/mixlib/mix_scanner.l
index e85b6c8..fd47d92 100644
--- a/mixlib/mix_scanner.l
+++ b/mixlib/mix_scanner.l
@@ -86,12 +86,12 @@
     yy_push_state (EVAL);			\
   } while (FALSE)
 
-#define ENTER_WEVAL()				\
+#define ENTER_WEVAL(s)				\
   do {						\
     wexpr_val = MIX_WORD_ZERO;			\
     wexpr_val_tmp = MIX_WORD_ZERO;		\
     is_fp = FALSE;                              \
-    yyless (0);					\
+    yyless (s);					\
     yy_push_state (WEVAL);			\
   } while (FALSE)
 
@@ -133,7 +133,7 @@ static void unput_word_ (mix_word_t word);
 %s  EQU
 %s  END
 
-ws	[ \t]+
+ws	[ \t]
 digit	[0-9]
 letter	[A-Z]
 number	[+-]?{digit}+
@@ -164,6 +164,9 @@ wexpr   {expr}({fpart})?(,{expr}({fpart})?)*
   ins.address = 0;
   ins.index = 0;
   parser->err_line = 0;
+#ifdef FLEX_DEBUG
+  yy_flex_debug = getenv("FLEX_DEBUG");
+#endif
   yyin = mix_file_to_FILE (parser->in_file);
 
 %}
@@ -231,14 +234,14 @@ wexpr   {expr}({fpart})?(,{expr}({fpart})?)*
 }
 
 <OP>{
-  {ws} /* eat leading whitespace */
+  {ws}+ /* eat leading whitespace */
   \n    RETURN_ERROR (MIX_PERR_NOOP, NULL);
   ORIG{ws}+  BEGIN (ORIG);
   CON{ws}+   BEGIN (CON);
   EQU{ws}+   BEGIN (EQU);
   END{ws}+   BEGIN (END);
-  ALF{ws}+\"{mixchar}{5,}\"{ws}+.*\n |
-  ALF{ws}+\"{mixchar}{5,}\"{ws}*\n {
+  ALF{ws}+\"{mixchar}{0,5}\"{ws}+.*\n |
+  ALF{ws}+\"{mixchar}{0,5}\"{ws}*\n {
     mix_byte_t bytes[5];
     mix_word_t value;
     guint k, j = 4;
@@ -247,22 +250,42 @@ wexpr   {expr}({fpart})?(,{expr}({fpart})?)*
     for ( k = j; k < 5+j && yytext[k] != '\"'; ++k )
       bytes[k-j] = mix_ascii_to_char (yytext[k]);
     if ( k-j < 5 )
-      mix_parser_log_error (parser, MIX_PERR_SHORT_ALF, lineno, NULL, TRUE);
+      {
+	mix_parser_log_error (parser, MIX_PERR_SHORT_ALF, lineno, NULL, TRUE);
+	/* Fill with spaces */
+	for (; k < 5+j; k++)
+	  bytes[k-j] = mix_ascii_to_char (' ');
+      }
     else if ( yytext[k] != '\"' )
       mix_parser_log_error (parser, MIX_PERR_LONG_ALF, lineno, NULL, TRUE);
 
     value = mix_bytes_to_word (bytes, 5);
-
     ADD_RAW (value, FALSE);
    }
-  ALF{ws}+.*\n {
-    gchar* msg;
-    guint k = 4;
-    while ( isspace(yytext[k]) ) k++;
-    msg = g_strdup_printf("\"%5s\"", g_strchomp (yytext + k));
-    mix_parser_log_error (parser, MIX_PERR_UNQUOTED_ALF, lineno, msg, FALSE);
-    g_free (msg);
+  ALF{ws}*\n {
+    mix_byte_t bytes[5];
+    memset (bytes, mix_ascii_to_char (' '), 5);
+    mix_word_t value = mix_bytes_to_word (bytes, 5);
+    ADD_RAW (value, FALSE);
+  }
+  ALF{ws}+({mixchar}{1,5}) {
+    mix_byte_t bytes[5];
+    mix_word_t value;
+    int i, n;
+    for (n = 3; n < yyleng; n++)
+      if (!isspace (yytext[n]))
+	break;
+
+    for (i = 0; i < 5 && n < yyleng; i++, n++)
+      bytes[i] = mix_ascii_to_char (yytext[n]);
+
+    for (; i < 5; i++)
+      bytes[i] = mix_ascii_to_char (' ');
+
+    value = mix_bytes_to_word (bytes, 5);
+    ADD_RAW (value, FALSE);
   }
+            /* ALF " " */
   [A-Z0-9]+{ws}*/\n |
   [A-Z0-9]+{ws}+ {
     mix_ins_id_t id = mix_get_id_from_string (g_strchomp (yytext));
@@ -324,7 +347,7 @@ wexpr   {expr}({fpart})?(,{expr}({fpart})?)*
 }
 
 <ORIG,CON,EQU,END>{
-  {wexpr} ENTER_WEVAL ();
+  {wexpr} ENTER_WEVAL (0);
   . RETURN_ERROR (MIX_PERR_INV_OP, yytext);
 }
 
@@ -334,6 +357,7 @@ wexpr   {expr}({fpart})?(,{expr}({fpart})?)*
 <ADDRESS>{
   =/[+-]?{number}=  lsf = TRUE;
   =/{expr}=     lsf = TRUE;
+  ={wexpr}=  { lsf = TRUE; ENTER_WEVAL (1); }
   [+-]?{number}={ws}*\n   |
   [+-]?{number}={ws}+.*\n {
     if (!lsf) RETURN_ERROR (MIX_PERR_INV_ADDRESS, yytext);
@@ -494,7 +518,7 @@ wexpr   {expr}({fpart})?(,{expr}({fpart})?)*
   {number}/[,()\n\t ] wexpr_val = mix_word_new (atol (yytext));
   {expr}/[,()\n\t ]  ENTER_EVAL ();
   ,/{expr} /* eat comma if followed by expression */
-  [\n\t ] { /* ok if not inside an f-part */
+  [=\n\t ] { /* ok if not inside an f-part */
     if ( is_fp ) {
       mix_parser_log_error (parser, MIX_PERR_MIS_PAREN, lineno, NULL, FALSE);
       yy_pop_state ();
-- 
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