libc/src/stdio/printf_core/converter.cpp

   1 //===-- Format specifier converter implmentation 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/converter.h"
  10
  11 #include "src/stdio/printf_core/core_structs.h"
  12 #include "src/stdio/printf_core/writer.h"
  13
  14 // This option allows for replacing all of the conversion functions with custom
  15 // replacements. This allows conversions to be replaced at compile time.
  16 #ifndef LIBC_COPT_PRINTF_CONV_ATLAS
  17 #include "src/stdio/printf_core/converter_atlas.h"
  18 #else
  19 #include LIBC_COPT_PRINTF_CONV_ATLAS
  20 #endif
  21
  22 #include <stddef.h>
  23
  24 namespace LIBC_NAMESPACE {
  25 namespace printf_core {
  26
  27 int convert(Writer *writer, const FormatSection &to_conv) {
  28   if (!to_conv.has_conv)
  29     return writer->write(to_conv.raw_string);
  30
  31 #if !defined(LIBC_COPT_PRINTF_DISABLE_FLOAT) &&                                \
  32     defined(LIBC_COPT_PRINTF_HEX_LONG_DOUBLE)
  33   if (to_conv.length_modifier == LengthModifier::L) {
  34     switch (to_conv.conv_name) {
  35     case 'f':
  36     case 'F':
  37     case 'e':
  38     case 'E':
  39     case 'g':
  40     case 'G':
  41       return convert_float_hex_exp(writer, to_conv);
  42     default:
  43       break;
  44     }
  45   }
  46 #endif // LIBC_COPT_PRINTF_DISABLE_FLOAT
  47
  48   switch (to_conv.conv_name) {
  49   case '%':
  50     return writer->write("%");
  51   case 'c':
  52     return convert_char(writer, to_conv);
  53   case 's':
  54     return convert_string(writer, to_conv);
  55   case 'd':
  56   case 'i':
  57   case 'u':
  58   case 'o':
  59   case 'x':
  60   case 'X':
  61     return convert_int(writer, to_conv);
  62 #ifndef LIBC_COPT_PRINTF_DISABLE_FLOAT
  63   case 'f':
  64   case 'F':
  65     return convert_float_decimal(writer, to_conv);
  66   case 'e':
  67   case 'E':
  68     return convert_float_dec_exp(writer, to_conv);
  69   case 'a':
  70   case 'A':
  71     return convert_float_hex_exp(writer, to_conv);
  72   case 'g':
  73   case 'G':
  74     return convert_float_dec_auto(writer, to_conv);
  75 #endif // LIBC_COPT_PRINTF_DISABLE_FLOAT
  76 #ifndef LIBC_COPT_PRINTF_DISABLE_WRITE_INT
  77   case 'n':
  78     return convert_write_int(writer, to_conv);
  79 #endif // LIBC_COPT_PRINTF_DISABLE_WRITE_INT
  80   case 'p':
  81     return convert_pointer(writer, to_conv);
  82   default:
  83     return writer->write(to_conv.raw_string);
  84   }
  85   return -1;
  86 }
  87
  88 } // namespace printf_core
  89 } // namespace LIBC_NAMESPACE