1 files changed, 137 insertions, 0 deletions
diff --git a/code/tools/lcc/src/error.c b/code/tools/lcc/src/error.c
new file mode 100644
index 0000000..2187c10
--- /dev/null
+++ b/code/tools/lcc/src/error.c
@@ -0,0 +1,137 @@
+#include "c.h"
+
+
+static void printtoken(void);
+int errcnt   = 0;
+int errlimit = 20;
+char kind[] = {
+#define xx(a,b,c,d,e,f,g) f,
+#define yy(a,b,c,d,e,f,g) f,
+#include "token.h"
+};
+int wflag;		/* != 0 to suppress warning messages */
+
+void test(int tok, char set[]) {
+	if (t == tok)
+		t = gettok();
+	else {
+		expect(tok);
+		skipto(tok, set);
+		if (t == tok)
+			t = gettok();
+	}
+}
+void expect(int tok) {
+	if (t == tok)
+		t = gettok();
+	else {
+		error("syntax error; found");
+		printtoken();
+		fprint(stderr, " expecting `%k'\n", tok);
+	}
+}
+void error(const char *fmt, ...) {
+	va_list ap;
+
+	if (errcnt++ >= errlimit) {
+		errcnt = -1;
+		error("too many errors\n");
+		exit(1);
+	}
+	va_start(ap, fmt);
+	if (firstfile != file && firstfile && *firstfile)
+		fprint(stderr, "%s: ", firstfile);
+	fprint(stderr, "%w: ", &src);
+	vfprint(stderr, NULL, fmt, ap);
+	va_end(ap);
+}
+
+void skipto(int tok, char set[]) {
+	int n;
+	char *s;
+
+	assert(set);
+	for (n = 0; t != EOI && t != tok; t = gettok()) {
+		for (s = set; *s && kind[t] != *s; s++)
+			;
+		if (kind[t] == *s)
+			break;
+		if (n++ == 0)
+			error("skipping");
+		if (n <= 8)
+			printtoken();
+		else if (n == 9)
+			fprint(stderr, " ...");
+	}
+	if (n > 8) {
+		fprint(stderr, " up to");
+		printtoken();
+	}
+	if (n > 0)
+		fprint(stderr, "\n");
+}
+/* fatal - issue fatal error message and exit */
+int fatal(const char *name, const char *fmt, int n) {
+	print("\n");
+	errcnt = -1;
+	error("compiler error in %s--", name);
+	fprint(stderr, fmt, n);
+	exit(EXIT_FAILURE);
+	return 0;
+}
+
+/* printtoken - print current token preceeded by a space */
+static void printtoken(void) {
+	switch (t) {
+	case ID: fprint(stderr, " `%s'", token); break;
+	case ICON:
+		fprint(stderr, " `%s'", vtoa(tsym->type, tsym->u.c.v));
+		break;
+	case SCON: {
+		int i, n;
+		if (ischar(tsym->type->type)) {
+			char *s = tsym->u.c.v.p;
+			n = tsym->type->size;
+			fprint(stderr, " \"");
+			for (i = 0; i < 20 && i < n && *s; s++, i++)
+				if (*s < ' ' || *s >= 0177)
+					fprint(stderr, "\\%o", *s);
+				else
+					fprint(stderr, "%c", *s);
+		} else {	/* wchar_t string */
+			unsigned int *s = tsym->u.c.v.p;
+			assert(tsym->type->type->size == widechar->size);
+			n = tsym->type->size/widechar->size;
+			fprint(stderr, " L\"");
+			for (i = 0; i < 20 && i < n && *s; s++, i++)
+				if (*s < ' ' || *s >= 0177)
+					fprint(stderr, "\\x%x", *s);
+				else
+					fprint(stderr, "%c", *s);
+		}
+		if (i < n)
+			fprint(stderr, " ...");
+		else
+			fprint(stderr, "\"");
+		break;
+		}
+	case FCON:
+		fprint(stderr, " `%S'", token, (char*)cp - token);
+		break;
+	case '`': case '\'': fprint(stderr, " \"%k\"", t); break;
+	default: fprint(stderr, " `%k'", t);
+	}
+}
+
+/* warning - issue warning error message */
+void warning(const char *fmt, ...) {
+	va_list ap;
+
+	va_start(ap, fmt);
+	if (wflag == 0) {
+		errcnt--;
+		error("warning: ");
+		vfprint(stderr, NULL, fmt, ap);
+	}
+	va_end(ap);
+}