Style parser

src/main/c/stream/helper/style.c

@@ -0,0 +1,61 @@
+#ifndef _HDR_HYPERBUILD_STREAM_HELPER_STYLE
+#define _HDR_HYPERBUILD_STREAM_HELPER_STYLE
+
+#include "../../error/error.c"
+#include "../../util/hbchar.h"
+#include "../../util/pipe.c"
+
+static void _hbsh_style_comment(hbu_pipe_t pipe) {
+  hbu_pipe_require_match(pipe, "/*");
+
+  while (!hbu_pipe_accept_if_matches(pipe, "*/")) {
+    hbu_pipe_accept(pipe);
+  }
+}
+
+static void _hbsh_style_string(hbu_pipe_t pipe) {
+  hb_char_t delim = hbu_pipe_accept(pipe);
+
+  if (delim != '"' && delim != '\'') {
+    hbu_pipe_error(pipe, HBE_PARSE_EXPECTED_NOT_FOUND, "Expected CSS string delimiter");
+  }
+
+  int escaping = 0;
+
+  while (1) {
+    hb_char_t c = hbu_pipe_accept(pipe);
+
+    if (c == '\\') {
+      escaping ^= 1;
+      continue;
+    }
+
+    if (c == delim && !escaping) {
+      break;
+    }
+
+    if (hbu_pipe_accept_if_matches_line_terminator(pipe)) {
+      if (!escaping) {
+        hbu_pipe_error(pipe, HBE_PARSE_EXPECTED_NOT_FOUND, "Unterminated CSS string");
+      }
+    }
+
+    escaping = 0;
+  }
+}
+
+void hbsh_style(hbu_pipe_t pipe) {
+  while (!hbu_pipe_matches(pipe, "</")) {
+    if (hbu_pipe_matches(pipe, "/*")) {
+      _hbsh_style_comment(pipe);
+
+    } else if (hbu_pipe_peek(pipe) == '"' || hbu_pipe_peek(pipe) == '\'') {
+      _hbsh_style_string(pipe);
+
+    } else {
+      hbu_pipe_accept(pipe);
+    }
+  }
+}
+
+#endif // _HDR_HYPERBUILD_STREAM_HELPER_STYLE