1 files changed, 73 insertions, 0 deletions
diff --git a/libasn1fix/asn1fix_cstring.c b/libasn1fix/asn1fix_cstring.c
new file mode 100644
index 00000000..b8a38833
--- /dev/null
+++ b/libasn1fix/asn1fix_cstring.c
@@ -0,0 +1,73 @@
+#include "asn1fix_internal.h"
+
+struct _cstring_pattern {
+	char *start;
+	int length;
+};
+static int _asn1f_cstring_find_line_pattern(char *s, struct _cstring_pattern *);
+
+int
+asn1f_fix_cstring(arg_t *arg) {
+	asn1p_expr_t *expr = arg->expr;
+	int r_value = 0;
+
+	if(expr->value && expr->value->type == ATV_STRING) {
+		struct _cstring_pattern cp;
+		char *buf = expr->value->value.string.buf;
+		int buflen = expr->value->value.string.size;
+		int start = 0;
+
+		DEBUG("%s(%s) for line %d", __func__,
+			expr->Identifier, expr->_lineno);
+
+		while(_asn1f_cstring_find_line_pattern(buf + start, &cp)) {
+			assert(cp.length);
+			memmove(cp.start, cp.start + cp.length,
+				buflen - ((cp.start + cp.length) - buf));
+			buflen -= cp.length;
+			start = cp.start - buf;
+			buf[buflen] = '\0';
+		}
+	}
+
+	return r_value;
+}
+
+/*
+ * If a string has a newline, the tabulation and spaces before and
+ * after it must be eliminated.
+ */
+static int
+_asn1f_cstring_find_line_pattern(char *s, struct _cstring_pattern *cp) {
+	int newline_found = 0;
+
+	cp->start = NULL;
+
+	for(;;s++) {
+		switch(*s) {
+		case '\r': case '\n':
+			newline_found = 1;
+			/* Fall through */
+		case ' ': case '\t':
+			if(cp->start == NULL)
+				cp->start = s;
+			continue;
+		case '\0':
+		default:
+			if(newline_found) {
+				cp->length = s - cp->start;
+				return 1;
+			}
+
+			cp->start = NULL;
+			if(*s == '\0')
+				break;
+			continue;
+		}
+		break;
+	}
+
+	return 0;
+}
+
+