xml: escaped chars

1 files changed, 64 insertions, 1 deletions

diff --git a/source/kit/xml.c b/source/kit/xml.c
index fbe4ec2..8d22bf3 100644
--- a/source/kit/xml.c
+++ b/source/kit/xml.c
@@ -46,7 +46,70 @@ static s32 kit_xml_alloc_and_unescape_(str_builder_t *dst, str_t str,
         dst->values[dst->size++] = '"';
       else if (n == 5 && memcmp(str.values + i, "'", 6) == 0)
         dst->values[dst->size++] = '\'';
-      else {
+      else if (n - 2 <= 8 && str.values[i + 1] == '#' &&
+               str.values[i + 2] == 'x') {
+        //  hex encoding
+        //
+
+        c8  buf[8];
+        u64 x = 0;
+
+        memcpy(buf, str.values + (i + 3), n - 2);
+
+        for (i64 k = 0; k < n - 2; k++) {
+          c8 c = str.values[i + 3 + k];
+          x <<= 8;
+          if (c >= '0' && c <= '9')
+            x |= (c - '0');
+          else if (c >= 'a' && c <= 'f')
+            x |= 10 + (c - 'a');
+          else if (c >= 'A' && c <= 'F')
+            x |= 10 + (c - 'A');
+          else {
+            x = 0;
+            break;
+          }
+        }
+
+        if (x == 0 || x > 255u) {
+          //  TODO
+          //  UTF-8 encoding
+
+          DA_DESTROY(*dst);
+          return KIT_PARSING_FAILED;
+        }
+
+        dst->values[dst->size++] = (c8) x;
+      } else if (n - 1 <= 20 && str.values[i + 1] == '#') {
+        //  dec encoding
+        //
+
+        c8  buf[20];
+        u64 x = 0;
+
+        memcpy(buf, str.values + (i + 2), n - 2);
+
+        for (i64 k = 0; k < n - 1; k++) {
+          c8 c = str.values[i + 2 + k];
+          x *= 10;
+          if (c >= '0' && c <= '9')
+            x += (c - '0');
+          else {
+            x = 0;
+            break;
+          }
+        }
+
+        if (x == 0 || x > 255u) {
+          //  TODO
+          //  UTF-8 encoding
+
+          DA_DESTROY(*dst);
+          return KIT_PARSING_FAILED;
+        }
+
+        dst->values[dst->size++] = (c8) x;
+      } else {
         DA_DESTROY(*dst);
         return KIT_PARSING_FAILED;
       }