X-Git-Url: http://shamusworld.gotdns.org/cgi-bin/gitweb.cgi?p=rmac;a=blobdiff_plain;f=expr.c;h=3a23e6e3cf68d4949ef1372ca98da1defecac7f6;hp=4318aa7d6b98f871e9a93ea5e72d2bfebf7c7d52;hb=c38505ee4b2a0de59926107e52fb8bb84041a0e4;hpb=5c1e995754b4f4cab5f58260af13f51000f13bd3

diff --git a/expr.c b/expr.c
index 4318aa7..3a23e6e 100644
--- a/expr.c
+++ b/expr.c
@@ -1,7 +1,7 @@
 //
 // RMAC - Reboot's Macro Assembler for all Atari computers
 // EXPR.C - Expression Analyzer
-// Copyright (C) 199x Landon Dyer, 2011-2018 Reboot and Friends
+// Copyright (C) 199x Landon Dyer, 2011-2020 Reboot and Friends
 // RMAC derived from MADMAC v1.07 Written by Landon Dyer, 1986
 // Source utilised with the kind permission of Landon Dyer
 //
@@ -35,8 +35,8 @@ char itokcl[] = {
 	CR_DEFINED, CR_REFERENCED,		// SUNARY (special unary)
 	CR_STREQ, CR_MACDEF,
 	CR_DATE, CR_TIME,
-	CR_ABSCOUNT, 0,
-	'!', '~', UNMINUS, 0,			// UNARY
+	CR_ABSCOUNT, CR_FILESIZE, 0,
+	'!', '~', UNMINUS, UNLT, UNGT, 0,	// UNARY
 	'*', '/', '%', 0,				// MULT
 	'+', '-', 0,					// ADD
 	SHL, SHR, 0,					// SHIFT
@@ -49,6 +49,7 @@ char itokcl[] = {
 
 const char missym_error[] = "missing symbol";
 const char str_error[] = "missing symbol or string";
+const char noflt_error[] = "operator not usable with float";
 
 // Convert expression to postfix
 static PTR evalTokenBuffer;		// Deposit tokens here (this is really a
@@ -125,23 +126,24 @@ int expr0(void)
 //
 int expr1(void)
 {
-	TOKEN t;
-	SYM * sy;
-	char * p, * p2;
+	char * p;
 	WORD w;
-	int j;
 
 	int class = tokenClass[*tok];
 
-	if (*tok == '-' || *tok == '+' || class == UNARY)
+	if (*tok == '-' || *tok == '+' || *tok == '<' || *tok == '>' || class == UNARY)
 	{
-		t = *tok++;
+		TOKEN t = *tok++;
 
 		if (expr2() != OK)
 			return ERROR;
 
 		if (t == '-')
 			t = UNMINUS;
+		else if (t == '<')
+			t = UNLT;
+		else if (t == '>')
+			t = UNGT;
 
 		// With leading + we don't have to deposit anything to the buffer
 		// because there's no unary '+' nor we have to do anything about it
@@ -153,8 +155,54 @@ int expr1(void)
 		switch (*tok++)
 		{
 		case CR_ABSCOUNT:
+			if (cursect != ABS)
+			{
+				*evalTokenBuffer.u32++ = CONST;
+				*evalTokenBuffer.u64++ = sect[ABS].sloc;
+			}
+			else
+			{
+				*evalTokenBuffer.u32++ = CONST;
+				*evalTokenBuffer.u64++ = sloc;
+			}
+			break;
+		case CR_FILESIZE:
+			if (*tok++ != STRING)
+				return error("^^FILESIZE expects filename inside string");
+
 			*evalTokenBuffer.u32++ = CONST;
-			*evalTokenBuffer.u64++ = (uint64_t)sect[ABS].sloc;
+			// @@copypasted from d_incbin, maybe factor this out somehow?
+			// Attempt to open the include file in the current directory, then (if that
+			// failed) try list of include files passed in the enviroment string or by
+			// the "-d" option.
+			int fd, i;
+			char buf1[256];
+
+			if ((fd = open(string[*tok], _OPEN_INC)) < 0)
+			{
+				for(i=0; nthpath("RMACPATH", i, buf1)!= 0; i++)
+				{
+					fd = strlen(buf1);
+					
+					// Append path char if necessary
+					if ((fd > 0) && (buf1[fd - 1] != SLASHCHAR))
+						strcat(buf1, SLASHSTRING);
+					
+					strcat(buf1, string[*tok]);
+					
+					if ((fd = open(buf1, _OPEN_INC)) >= 0)
+						goto allright;
+				}
+				
+				return error("cannot open: \"%s\"", string[tok[1]]);
+			}
+
+allright:
+			*evalTokenBuffer.u64++ = (uint64_t)lseek(fd, 0L, SEEK_END);
+			close(fd);
+
+			// Advance tok because of consumed string token
+			tok++;
 			break;
 		case CR_TIME:
 			*evalTokenBuffer.u32++ = CONST;
@@ -183,8 +231,9 @@ getsym:
 				return error(missym_error);
 
 			p = string[*tok++];
-			j = (*p == '.' ? curenv : 0);
-			w = ((sy = lookup(p, LABEL, j)) != NULL && (sy->sattr & w) ? 1 : 0);
+			int j = (*p == '.' ? curenv : 0);
+			SYM * sy = lookup(p, LABEL, j);
+			w = ((sy != NULL) && (sy->sattr & w ? 1 : 0));
 			*evalTokenBuffer.u32++ = CONST;
 			*evalTokenBuffer.u64++ = (uint64_t)w;
 			break;
@@ -201,7 +250,7 @@ getsym:
 			if (*tok != SYMBOL && *tok != STRING)
 				return error(str_error);
 
-			p2 = string[tok[1]];
+			char * p2 = string[tok[1]];
 			tok += 2;
 
 			w = (WORD)(!strcmp(p, p2));
@@ -222,9 +271,6 @@ getsym:
 //
 int expr2(void)
 {
-	char * p;
-	SYM * sy;
-	int j;
 	PTR ptk;
 
 	switch (*tok++)
@@ -242,9 +288,10 @@ int expr2(void)
 		tok = ptk.u32;
 		break;
 	case SYMBOL:
-		p = string[*tok++];
-		j = (*p == '.' ? curenv : 0);
-		sy = lookup(p, LABEL, j);
+	{
+		char * p = string[*tok++];
+		int j = (*p == '.' ? curenv : 0);
+		SYM * sy = lookup(p, LABEL, j);
 
 		if (sy == NULL)
 			sy = NewSymbol(p, LABEL, j);
@@ -264,6 +311,7 @@ int expr2(void)
 		symbolPtr[symbolNum] = sy;
 		symbolNum++;
 		break;
+ 	}
 	case STRING:
 		*evalTokenBuffer.u32++ = CONST;
 		*evalTokenBuffer.u64++ = str_value(string[*tok++]);
@@ -494,10 +542,15 @@ thrown away right here. What the hell is it for?
 
 			tok += 2;
 		}
+		// Holy hell... This is likely due to the fact that LSR is mistakenly set as a SUNARY type... Need to fix this... !!! FIX !!!
+		else if (m6502)
+		{
+			*evalTokenBuffer.u32++ = *tok++;
+		}
 		else
 		{
 			// Unknown type here... Alert the user!,
-			error("undefined RISC register in expression");
+			error("undefined RISC register in expression [token=$%X]", *tok);
 			// Prevent spurious error reporting...
 			tok++;
 			return ERROR;
@@ -691,6 +744,30 @@ printf("EVEXPR (-): sym1 = %X, sym2 = %X\n", attr, sattr[1]);
 
 			break;
 
+		case UNLT: // Unary < (get the low byte of a word)
+//printf("evexpr(): UNLT\n");
+			if (*sattr & TDB)
+				return error(seg_error);
+
+			if (*sattr & FLOAT)
+				return error(noflt_error);
+
+			*sval = (int64_t)((*sval) & 0x00FF);
+			*sattr = ABS | DEFINED;			// Expr becomes absolute
+			break;
+
+		case UNGT: // Unary > (get the high byte of a word)
+//printf("evexpr(): UNGT\n");
+			if (*sattr & TDB)
+				return error(seg_error);
+
+			if (*sattr & FLOAT)
+				return error(noflt_error);
+
+			*sval = (int64_t)(((*sval) >> 8) & 0x00FF);
+			*sattr = ABS | DEFINED;			// Expr becomes absolute
+			break;
+
 		case '!':
 //printf("evexpr(): !\n");
 			if (*sattr & TDB)