(c) message in header files and doc mini adjustments.

[rmac] / expr.c

diff --git a/expr.c b/expr.c
index debcd8884d06915ad75b007ccc72866265407081..44fd892bab2d0594170dd834741b411dc9498284 100644 (file)
--- a/expr.c
+++ b/expr.c
@@ -1,7 +1,7 @@
 //
-// RMAC - Reboot's Macro Assembler for the Atari Jaguar Console System
+// RMAC - Reboot's Macro Assembler for all Atari computers
 // EXPR.C - Expression Analyzer
-// Copyright (C) 199x Landon Dyer, 2017 Reboot and Friends
+// Copyright (C) 199x Landon Dyer, 2011-2017 Reboot and Friends
 // RMAC derived from MADMAC v1.07 Written by Landon Dyer, 1986
 // Source utilised with the kind permission of Landon Dyer
 //
@@ -287,6 +287,20 @@ int expr2(void)
                *evalTokenBuffer++ = (orgactive ? orgaddr : pcloc);
                // '*' takes attributes of current section, not ABS!
                *evalTokenBuffer++ = cursect | DEFINED;
+               break;
+       case '{':
+               if (expr0() != OK)                                                      // Eat up first parameter (register or immediate)
+                       return ERROR;
+
+               if (*tok++ != ':')                                                      // Demand a ':' there
+                       return error("missing colon ':'");
+
+               if (expr0() != OK)                                                      // Eat up second parameter (register or immediate)
+                       return ERROR;
+
+               if (*tok++ != '}')
+                       return error("missing close bracket '}'");
+
                break;
        default:
                return error("bad expression");
@@ -464,17 +478,12 @@ thrown away right here. What the hell is it for?
 //
 int evexpr(TOKEN * tk, VALUE * a_value, WORD * a_attr, SYM ** a_esym)
 {
-       WORD * sattr;
-       VALUE * sval;
        WORD attr;
        SYM * sy;
-       SYM * esym;
-       WORD sym_seg;
-
-       sval = evstk;                                                   // (Empty) initial stack
-       sattr = evattr;
-       esym = NULL;                                                    // No external symbol involved
-       sym_seg = 0;
+       VALUE * sval = evstk;                                   // (Empty) initial stack
+       WORD * sattr = evattr;
+       SYM * esym = NULL;                                              // No external symbol involved
+       WORD sym_seg = 0;
 
        while (*tk != ENDEXPR)
        {
@@ -744,7 +753,7 @@ printf("EVEXPR (-): sym1 = %X, sym2 = %X\n", attr, sattr[1]);
        // sym_seg added in 1.0.16 to solve a problem with forward symbols in
        // expressions where absolute values also existed. The absolutes were
        // overiding the symbol segments and not being included :(
-       //*a_attr = *sattr | sym_seg;                                        // Copy value + attrib
+       //*a_attr = *sattr | sym_seg;           // Copy value + attrib
 
        *a_attr = *sattr;                                               // Copy value + attrib
        *a_value = *sval;