Import of the watch repository from Pebble

platform/tintin/boot/libc/string/strspn.c

@@ -0,0 +1,57 @@
+/*
+ * Copyright 2024 Google LLC
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+///////////////////////////////////////
+// Implements:
+//   size_t strcspn(const char *s1, const char *s2);
+//   size_t strspn(const char *s1, const char *s2);
+
+#include <stddef.h>
+#include <string.h>
+
+size_t strcspn(const char *s1, const char *s2) {
+  size_t len = 0;
+  const char *p;
+  while (s1[len]) {
+    p = s2;
+    while (*p) {
+      if (s1[len] == *p++) {
+        return len;
+      }
+    }
+    len++;
+  }
+  return len;
+}
+
+size_t strspn(const char *s1, const char *s2) {
+  size_t len = 0;
+  const char *p;
+  while (s1[len]) {
+    p = s2;
+    while (*p) {
+      if (s1[len] == *p) {
+        break;
+      }
+      p++;
+    }
+    if (!*p) {
+      return len;
+    }
+    len++;
+  }
+  return len;
+}