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/__support/macros/config.h"
  12 #include "src/stdio/printf_core/core_structs.h"
  13 #include "src/stdio/printf_core/printf_config.h"
  14 #include "src/stdio/printf_core/strerror_converter.h"
  15 #include "src/stdio/printf_core/writer.h"
  16
  17 // This option allows for replacing all of the conversion functions with custom
  18 // replacements. This allows conversions to be replaced at compile time.
  19 #ifndef LIBC_COPT_PRINTF_CONV_ATLAS
  20 #include "src/stdio/printf_core/converter_atlas.h"
  21 #else
  22 #include LIBC_COPT_PRINTF_CONV_ATLAS
  23 #endif
  24
  25 #include <stddef.h>
  26
  27 namespace LIBC_NAMESPACE_DECL {
  28 namespace printf_core {
  29
  30 int convert(Writer *writer, const FormatSection &to_conv) {
  31   if (!to_conv.has_conv)
  32     return writer->write(to_conv.raw_string);
  33
  34 #if !defined(LIBC_COPT_PRINTF_DISABLE_FLOAT) &&                                \
  35     defined(LIBC_COPT_PRINTF_HEX_LONG_DOUBLE)
  36   if (to_conv.length_modifier == LengthModifier::L) {
  37     switch (to_conv.conv_name) {
  38     case 'f':
  39     case 'F':
  40     case 'e':
  41     case 'E':
  42     case 'g':
  43     case 'G':
  44       return convert_float_hex_exp(writer, to_conv);
  45     default:
  46       break;
  47     }
  48   }
  49 #endif // LIBC_COPT_PRINTF_DISABLE_FLOAT
  50
  51   switch (to_conv.conv_name) {
  52   case '%':
  53     return writer->write("%");
  54   case 'c':
  55     return convert_char(writer, to_conv);
  56   case 's':
  57     return convert_string(writer, to_conv);
  58   case 'd':
  59   case 'i':
  60   case 'u':
  61   case 'o':
  62   case 'x':
  63   case 'X':
  64   case 'b':
  65   case 'B':
  66     return convert_int(writer, to_conv);
  67 #ifndef LIBC_COPT_PRINTF_DISABLE_FLOAT
  68   case 'f':
  69   case 'F':
  70     return convert_float_decimal(writer, to_conv);
  71   case 'e':
  72   case 'E':
  73     return convert_float_dec_exp(writer, to_conv);
  74   case 'a':
  75   case 'A':
  76     return convert_float_hex_exp(writer, to_conv);
  77   case 'g':
  78   case 'G':
  79     return convert_float_dec_auto(writer, to_conv);
  80 #endif // LIBC_COPT_PRINTF_DISABLE_FLOAT
  81 #ifdef LIBC_INTERNAL_PRINTF_HAS_FIXED_POINT
  82   case 'r':
  83   case 'R':
  84   case 'k':
  85   case 'K':
  86     return convert_fixed(writer, to_conv);
  87 #endif // LIBC_INTERNAL_PRINTF_HAS_FIXED_POINT
  88 #ifndef LIBC_COPT_PRINTF_DISABLE_STRERROR
  89   case 'm':
  90     return convert_strerror(writer, to_conv);
  91 #endif // LIBC_COPT_PRINTF_DISABLE_STRERROR
  92 #ifndef LIBC_COPT_PRINTF_DISABLE_WRITE_INT
  93   case 'n':
  94     return convert_write_int(writer, to_conv);
  95 #endif // LIBC_COPT_PRINTF_DISABLE_WRITE_INT
  96   case 'p':
  97     return convert_pointer(writer, to_conv);
  98   default:
  99     return writer->write(to_conv.raw_string);
 100   }
 101   return -1;
 102 }
 103
 104 } // namespace printf_core
 105 } // namespace LIBC_NAMESPACE_DECL