1 files changed, 120 insertions, 0 deletions
diff --git a/libpkgconf/fileio.c b/libpkgconf/fileio.c
new file mode 100644
index 0000000..d1c848f
--- /dev/null
+++ b/libpkgconf/fileio.c
@@ -0,0 +1,120 @@
+/*
+ * fileio.c
+ * File reading utilities
+ *
+ * Copyright (c) 2012 pkgconf authors (see AUTHORS).
+ *
+ * Permission to use, copy, modify, and/or distribute this software for any
+ * purpose with or without fee is hereby granted, provided that the above
+ * copyright notice and this permission notice appear in all copies.
+ *
+ * This software is provided 'as is' and without any warranty, express or
+ * implied.  In no event shall the authors be liable for any damages arising
+ * from the use of this software.
+ */
+
+#include <libpkgconf/libpkgconf.h>
+
+char *
+pkgconf_fgetline(char *line, size_t size, FILE *stream)
+{
+	char *s = line;
+	char *end = line + size - 1;
+	bool quoted = false;
+	int c = '\0', c2;
+
+	if (s == NULL)
+		return NULL;
+
+	while (s < end && (c = getc(stream)) != EOF)
+	{
+		if (c == '\\')
+		{
+			quoted = true;
+			continue;
+		}
+		else if (c == '#')
+		{
+			if (!quoted) {
+				/* Skip the rest of the line */
+				do {
+					c = getc(stream);
+				} while (c != '\n' && c != EOF);
+				*s++ = c;
+				break;
+			}
+			quoted = false;
+			continue;
+		}
+		else if (c == '\n')
+		{
+			if (quoted)
+			{
+				/* Trim spaces */
+				do {
+					c2 = getc(stream);
+				} while (c2 == '\t' || c2 == ' ');
+
+				ungetc(c2, stream);
+
+				quoted = false;
+				continue;
+			}
+			else
+			{
+				*s++ = c;
+			}
+
+			break;
+		}
+		else if (c == '\r')
+		{
+			*s++ = '\n';
+
+			if ((c2 = getc(stream)) == '\n')
+			{
+				if (quoted)
+				{
+					quoted = false;
+					continue;
+				}
+
+				break;
+			}
+
+			ungetc(c2, stream);
+
+			if (quoted)
+			{
+				quoted = false;
+				continue;
+			}
+
+			break;
+		}
+		else
+		{
+			if (quoted) {
+				*s++ = '\\';
+				quoted = false;
+			}
+			*s++ = c;
+		}
+
+	}
+
+	if (c == EOF && (s == line || ferror(stream)))
+		return NULL;
+
+	*s = '\0';
+
+	/* Remove newline character. */
+	if (s > line && *(--s) == '\n') {
+		*s = '\0';
+
+		if (s > line && *(--s) == '\r')
+			*s = '\0';
+	}
+
+	return line;
+}