1 //===-- String Writer implementation for printf -----------------*- C++ -*-===//
2 //
3 // Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
4 // See https://llvm.org/LICENSE.txt for license information.
5 // SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
6 //
7 //===----------------------------------------------------------------------===//
8 
9 #include "src/stdio/printf_core/string_writer.h"
10 #include "src/stdio/printf_core/core_structs.h"
11 #include "src/string/memory_utils/memcpy_implementations.h"
12 #include <stddef.h>
13 
14 namespace __llvm_libc {
15 namespace printf_core {
16 
17 void StringWriter::write(const char *__restrict to_write, size_t len) {
18   if (len > available_capacity)
19     len = available_capacity;
20 
21   if (len > 0) {
22     inline_memcpy(cur_buffer, to_write, len);
23     cur_buffer += len;
24     available_capacity -= len;
25   }
26 }
27 
28 int write_to_string(void *raw_pointer, const char *__restrict to_write,
29                     size_t len) {
30   StringWriter *string_writer = reinterpret_cast<StringWriter *>(raw_pointer);
31   string_writer->write(to_write, len);
32   return WRITE_OK;
33 }
34 
35 } // namespace printf_core
36 } // namespace __llvm_libc
37