Feat: added if/else branching and switch statement

Unsure about my modification to the language. I found the parsing of the
case body within switches to be odd - specifically that it parses
liberally and then checks that it has case -> cmd structuring while it
walks the code. This means the language is more permissive than the
semantics. I modified it to be more explicit, but at the cost of having
to end each case statement with a semicolon. I wanted a colon, but this
is a valid word character and thus will be lexed as part of the word.

1 files changed, 11 insertions, 5 deletions

diff --git a/src/cmd/rc/lex.c b/src/cmd/rc/lex.c
index 9ca2453..3722606 100644
--- a/src/cmd/rc/lex.c
+++ b/src/cmd/rc/lex.c
@@ -142,8 +142,7 @@ putbyte(char *buf, int c)
     return buf;
 }
 
-static
-char *
+static char *
 putrune(char *buf, int c)
 {
     buf = putbyte(buf, c);
@@ -184,7 +183,7 @@ isidentchar(int c)
 int
 yylex(void)
 {
-    int  c, d = peekc();
+    int c, d = peekc();
     Tree *node;
     char *w = lexer.buf;
 
@@ -369,8 +368,15 @@ yylex(void)
     }
 
     for(;;){
-        w = putrune(w, c);
-        c = peekc();
+        switch(c){
+        /* inject a magic glob character into our stream */
+        case '*': case '[': case '?': case (int)GLOB:
+            w = putbyte(w, GLOB);
+            /* fallthrough */
+        default:
+            w = putrune(w, c);
+            c = peekc();
+        }
         if(lexer.haddollar ? !isidentchar(c) : !iswordchar(c))
             break;
         advance();