1 files changed, 61 insertions, 0 deletions
diff --git a/llama.cpp/common/jinja/string.h b/llama.cpp/common/jinja/string.h
new file mode 100644
index 0000000..c496300
--- /dev/null
+++ b/llama.cpp/common/jinja/string.h
@@ -0,0 +1,61 @@
+#pragma once
+
+#include <optional>
+#include <string>
+#include <vector>
+
+#include "utils.h"
+
+namespace jinja {
+
+// allow differentiate between user input strings and template strings
+// transformations should handle this information as follows:
+// - one-to-one (e.g., uppercase, lowercase): preserve is_input flag
+// - one-to-many (e.g., strip): if input string is marked as is_input, all resulting parts should be marked as is_input
+// - many-to-one (e.g., concat): if ALL input parts are marked as is_input, resulting part should be marked as is_input
+struct string_part {
+    bool is_input = false; // may skip parsing special tokens if true
+    std::string val;
+
+    bool is_uppercase() const;
+    bool is_lowercase() const;
+};
+
+struct string {
+    std::vector<string_part> parts;
+    string() = default;
+    string(const std::string & v, bool user_input = false) {
+        parts.push_back({user_input, v});
+    }
+    string(int v) {
+        parts.push_back({false, std::to_string(v)});
+    }
+    string(double v) {
+        parts.push_back({false, std::to_string(v)});
+    }
+
+    // mark all parts as user input
+    void mark_input();
+
+    std::string str() const;
+    size_t length() const;
+    void hash_update(hasher & hash) const noexcept;
+    bool all_parts_are_input() const;
+    bool is_uppercase() const;
+    bool is_lowercase() const;
+
+    // mark this string as input if other has ALL parts as input
+    void mark_input_based_on(const string & other);
+
+    string append(const string & other);
+
+    // in-place transformations
+
+    string uppercase();
+    string lowercase();
+    string capitalize();
+    string titlecase();
+    string strip(bool left, bool right, std::optional<const std::string_view> chars = std::nullopt);
+};
+
+} // namespace jinja