+/**
+ * Remove the continuation characters from the input string.
+ * This is the very first step in preprocessing and is effective
+ * even inside comment blocks.
+ * If there is a whitespace between a backslash and a newline,
+ * this is not considered as a line continuation.
+ * \return GL_TRUE for success, GL_FALSE otherwise.
+ */
+static GLboolean
+_slang_preprocess_backslashes(slang_string *output,
+ const char *input)
+{
+ while (*input) {
+ if (input[0] == '\\') {
+ /* If a newline follows, eat the backslash and the newline. */
+ if (input[1] == '\r') {
+ if (input[2] == '\n') {
+ input += 3;
+ } else {
+ input += 2;
+ }
+ } else if (input[1] == '\n') {
+ if (input[2] == '\r') {
+ input += 3;
+ } else {
+ input += 2;
+ }
+ } else {
+ /* Leave the backslash alone. */
+ slang_string_pushc(output, *input++);
+ }
+ } else {
+ slang_string_pushc(output, *input++);
+ }
+ }
+ return GL_TRUE;
+}
+
+