Initial revision

util/ceg/EM_parser/common/help.c

@@ -0,0 +1,158 @@
+#include <ctype.h>
+#include <system.h>
+
+#define CODE_EXPANDER
+#include "em.h"
+
+#include "decl.h"
+
+extern int library;
+extern File *outfile;
+
+/* This file contains some routines called from the parser in 'pars.g' */
+
+question( str)
+char *str;
+
+/* Print : "if ( <str> ) {"
+ */
+{
+	register char c;
+	int arg_nr;
+
+	out( "if ( ");
+	for ( c = *str++; c != '\0'; c= *str++)
+		if ( c == '$' && isdigit( *str)) {
+
+			arg_nr = *str++ - '0' - 1;
+			out( "%s", C_instr_info->arg_id[arg_nr]);
+		}
+		else
+			out( "%c", c);
+	
+	out( ") {\n");
+}
+
+extern arith cur_pos;
+extern int segment;
+
+print_call( str)
+char *str;
+
+/* Print 'str' and handle the $i's. Also count the number of text-bytes
+ * that are generated, look for text?() and reloc?() calls.
+ */
+{
+	register char c;
+	int arg_nr;
+	extern int no_conversions;
+
+	if ( strncmp( "text", str, 4) == 0 && isdigit( *(str+4))) 
+		cur_pos += *(str+4) - '0';
+	else if ( strncmp( "reloc", str, 5) == 0 && isdigit( *(str+5)) &&
+		segment == SEGTXT) 
+		cur_pos += *(str+5) - '0';
+
+	for ( c = *str++; c != '\0'; c= *str++)
+		if ( c == '$' && isdigit( *str)) {
+
+			arg_nr = *str++ - '0' - 1;
+			if ( no_conversions)
+				out( "%s", C_instr_info->arg_id[arg_nr]);
+			else
+				out( "%s", C_instr_info->arg_conv[arg_nr]);
+		}
+		else
+			out( "%c", c);
+	
+	out( ";\n");
+}
+
+
+header( instr)
+char *instr;
+{
+	out( "%s%s", instr, C_instr_info->header);
+	def_admn( instr);
+}
+
+
+set_segment( seg)
+int seg;
+{
+	switch ( seg) {
+	  case SEGTXT : out( "switchseg( SEGTXT);\n");
+			 break;
+	  case SEGBSS  : out( "switchseg( SEGBSS);\n");
+			 out( "dump_label();\n");
+			 break;
+	  case SEGHOL  : out( "switchseg( SEGHOL); DOESN'T EXIST!!\n");
+			 break;
+	  case SEGCON  : out( "switchseg( SEGCON);\n");
+			 out( "dump_label();\n");
+			 break;
+	  case SEGROM  : out( "switchseg( SEGROM);\n");
+			 out( "dump_label();\n");
+			 break;
+	  case UNKNOWN : break;	/* dan niet! */
+	}
+}
+
+
+out( fmt, argv)
+char *fmt;
+int argv;
+{
+	doprnt( outfile, fmt, &argv);
+}
+
+
+char *suffix( str, suf)
+char *str, *suf;
+{
+	static char res[15];
+	char *s, *strncpy(), *strcat();
+	int strl, sufl, prefl;
+
+	strl = strlen( str);
+	sufl = strlen( suf);
+
+	for ( s = str + strl; --s >= str && *s != '.';)
+		;
+
+	if ( *s == '.')
+		prefl = s - str;
+	else
+		prefl = strl;
+	
+	if ( prefl + sufl + 1 > 14 )
+		prefl = 14 - 1 - sufl;
+	
+	strncpy( res, str, prefl);
+	res[prefl] = '\0';
+	s = strcat( res, ".");
+	s = strcat( s, suf);
+	return( s);
+}
+
+
+set_outfile( name)
+char *name;
+{
+	if ( library) {
+		name = suffix( name, "c");
+		sys_close( outfile);
+		if ( !sys_open( name, OP_WRITE, &outfile))
+			fprint( STDERR, "!! can't create %s !!\n", name);
+		file_header();
+	}
+}
+
+
+file_header()
+{
+	out( "#define CODE_EXPANDER\n");
+	out( "#include <em.h>\n");
+	out( "#include \"mach.h\"\n");
+	out( "#include \"back.h\"\n\n");
+}