new function append_escaped

appends a string after escaping it

1 files changed, 30 insertions, 1 deletions

diff --git a/src/util.c b/src/util.c
index ead07b5..345bf2f 100644
--- a/src/util.c
+++ b/src/util.c
@@ -108,7 +108,6 @@ for_each_line_in_file(const gchar *path, void (*callback)(const gchar *l, void *
     return FALSE;
 }
 
-
 enum exp_type
 get_exp_type(const gchar *s) {
     /* variables */
@@ -181,3 +180,33 @@ gchar*
 argv_idx(const GArray *a, const guint idx) {
     return g_array_index(a, gchar*, idx);
 }
+
+GString *
+append_escaped (GString *dest, const gchar *src) {
+	g_assert(dest);
+	g_assert(src);
+
+    // Hint that we are going to append another string.
+    int oldlen = dest->len;
+    g_string_set_size (dest, dest->len + strlen(src) * 2);
+    g_string_truncate (dest, oldlen);
+
+    // Append src char by char with baddies escaped
+    for (const gchar *p = src; *p; p++) {
+        switch (*p) {
+        case '\\':
+            g_string_append (dest, "\\\\");
+            break;
+        case '\'':
+            g_string_append (dest, "\\'");
+            break;
+        case '\n':
+            g_string_append (dest, "\\n");
+            break;
+        default:
+            g_string_append_c (dest, *p);
+            break;
+        }
+    }
+    return dest;
+}