libc/src/stdio/printf_core/printf_main.cpp

   1 //===-- Starting point 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/printf_main.h"
  10
  11 #include "src/__support/arg_list.h"
  12 #include "src/stdio/printf_core/converter.h"
  13 #include "src/stdio/printf_core/core_structs.h"
  14 #include "src/stdio/printf_core/parser.h"
  15 #include "src/stdio/printf_core/writer.h"
  16
  17 #include <stddef.h>
  18
  19 namespace __llvm_libc {
  20 namespace printf_core {
  21
  22 int printf_main(Writer *writer, const char *__restrict str,
  23                 internal::ArgList &args) {
  24   Parser<internal::ArgList> parser(str, args);
  25   int result = 0;
  26   for (FormatSection cur_section = parser.get_next_section();
  27        !cur_section.raw_string.empty();
  28        cur_section = parser.get_next_section()) {
  29     if (cur_section.has_conv)
  30       result = convert(writer, cur_section);
  31     else
  32       result = writer->write(cur_section.raw_string);
  33
  34     if (result < 0)
  35       return result;
  36   }
  37
  38   return writer->get_chars_written();
  39 }
  40
  41 } // namespace printf_core
  42 } // namespace __llvm_libc