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src/dawn/util/string.hpp

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+// Copyright (c) 2022 Dominic Masters
+// 
+// This software is released under the MIT License.
+// https://opensource.org/licenses/MIT
+
+#pragma once
+#include "assert/assert.hpp"
+
+/**
+ * Finds the next instance of a character within a string, safely (with a
+ * limit). The returned pointer will be NULL if not found, or a pointer to a 
+ * point within the string where the instance is.
+ * 
+ * @param haystack String to search.
+ * @param needle Character to search for.
+ * @param limit Max length you want to search for to limit yourself to.
+ * @return Pointer to the character found, or NULL if not found.
+ */
+static inline char * stringFindNext(
+  char *haystack,
+  char needle,
+  size_t limit
+) {
+  char *p;
+
+  assertNotNull(haystack);
+  assertTrue(limit > 0);
+
+  for(p = haystack; (size_t)(p - haystack) < limit; p++) {
+    if(*p == needle) return p;
+    assertFalse(*p == '\0');// We don't allow you to have a limit > strlen
+  }
+
+  return NULL;
+}