BSD 3 development

Work on file usr/src/cmd/pxp/yyprint.c

Synthesized-from: 3bsd

diff --git a/usr/src/cmd/pxp/yyprint.c b/usr/src/cmd/pxp/yyprint.c
new file mode 100644 (file)
index 0000000..8640f09
--- /dev/null
+++ b/usr/src/cmd/pxp/yyprint.c
@@ -0,0 +1,110 @@
+/* Copyright (c) 1979 Regents of the University of California */
+#
+/*
+ * pi - Pascal interpreter code translator
+ *
+ * Charles Haley, Bill Joy UCB
+ * Version 1.1 February 1978
+ *
+ *
+ * pxp - Pascal execution profiler
+ *
+ * Bill Joy UCB
+ * Version 1.1 February 1978
+ */
+
+#include "0.h"
+#include "yy.h"
+
+char   *tokname();
+
+int    bounce;
+
+/*
+ * Printing representation of a
+ * "character" - a lexical token
+ * not in a yytok structure.
+ * 'which' indicates which char * you want
+ * should always be called as "charname(...,0),charname(...,1)"
+ */
+char *
+charname(ch , which )
+       int ch;
+       int which;
+{
+       struct yytok Ych;
+
+       Ych.Yychar = ch;
+       Ych.Yylval = nullsem(ch);
+       return (tokname(&Ych , which ));
+}
+
+/*
+ * Printing representation of a token
+ * 'which' as above.
+ */
+char *
+tokname(tp , which )
+       register struct yytok *tp;
+       int                   which;
+{
+       register char *cp;
+       register struct kwtab *kp;
+       char    *cp2;
+
+       cp2 = "";
+       switch (tp->Yychar) {
+               case YCASELAB:
+                       cp = "case-label";
+                       break;
+               case YEOF:
+                       cp = "end-of-file";
+                       break;
+               case YILLCH:
+                       cp = "illegal character";
+                       break;
+               case 256:
+                       /* error token */
+                       cp = "error";
+                       break;
+               case YID:
+                       cp = "identifier";
+                       break;
+               case YNUMB:
+                       cp = "real number";
+                       break;
+               case YINT:
+               case YBINT:
+                       cp = "number";
+                       break;
+               case YSTRING:
+                       cp = tp->Yylval;
+                       cp = cp == NIL || cp[1] == 0 ? "character" : "string";
+                       break;
+               case YDOTDOT:
+                       cp = "'..'";
+                       break;
+               default:
+                       if (tp->Yychar < 256) {
+                               cp = "'x'\0'x'";
+                               /*
+                                * for twice reentrant code!
+                                * used to be:
+                                * if (bounce = ((bounce + 1) & 1))
+                                *      cp += 4;
+                                * now: don't bounce unless 0th call
+                                */
+                               if ( which == 0 )
+                                   bounce = ((bounce + 1) & 1);
+                               if (bounce)
+                                           cp =+ 4;
+                               cp[1] = tp->Yychar;
+                               break;
+                       }
+                       for (kp = yykey; kp->kw_str != NIL && kp->kw_val != tp->Yychar; kp++)
+                               continue;
+                       cp = "keyword ";
+                       cp2 = kp->kw_str;
+       }
+       return ( which ? cp2 : cp );
+}