Move syntax name/extension utilities to public API

1 files changed, 58 insertions, 0 deletions

diff --git a/src/syntax.c b/src/syntax.c
new file mode 100644
index 00000000..1599df08
--- /dev/null
+++ b/src/syntax.c
@@ -0,0 +1,58 @@
+// Copyright 2011-2020 David Robillard <d@drobilla.net>
+// SPDX-License-Identifier: ISC
+
+#include "string_utils.h"
+
+#include "serd/syntax.h"
+
+#include <stdbool.h>
+#include <string.h>
+
+typedef struct {
+  const char* name;
+  const char* extension;
+  SerdSyntax  syntax;
+} Syntax;
+
+static const Syntax syntaxes[] = {
+  {"turtle", ".ttl", SERD_TURTLE},
+  {"ntriples", ".nt", SERD_NTRIPLES},
+  {"nquads", ".nq", SERD_NQUADS},
+  {"trig", ".trig", SERD_TRIG},
+  {NULL, NULL, (SerdSyntax)0},
+};
+
+SerdSyntax
+serd_syntax_by_name(const char* const name)
+{
+  const size_t len = strlen(name);
+  if (len) {
+    for (const Syntax* s = syntaxes; s->name; ++s) {
+      if (!serd_strncasecmp(s->name, name, strlen(name))) {
+        return s->syntax;
+      }
+    }
+  }
+  return (SerdSyntax)0;
+}
+
+SerdSyntax
+serd_guess_syntax(const char* const filename)
+{
+  const char* ext = strrchr(filename, '.');
+  if (ext && ext[1]) {
+    const size_t ext_len = strlen(ext);
+    for (const Syntax* s = syntaxes; s->name; ++s) {
+      if (!serd_strncasecmp(s->extension, ext, ext_len)) {
+        return s->syntax;
+      }
+    }
+  }
+  return (SerdSyntax)0;
+}
+
+bool
+serd_syntax_has_graphs(const SerdSyntax syntax)
+{
+  return syntax == SERD_NQUADS || syntax == SERD_TRIG;
+}