1 | /* |
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2 | * Copyright (c) 1990 The Regents of the University of California. |
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3 | * All rights reserved. |
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4 | * |
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5 | * This code is derived from software contributed to Berkeley by |
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6 | * Chris Torek. |
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7 | * |
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8 | * Redistribution and use in source and binary forms, with or without |
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9 | * modification, are permitted provided that the following conditions |
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10 | * are met: |
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11 | * 1. Redistributions of source code must retain the above copyright |
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12 | * notice, this list of conditions and the following disclaimer. |
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13 | * 2. Redistributions in binary form must reproduce the above copyright |
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14 | * notice, this list of conditions and the following disclaimer in the |
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15 | * documentation and/or other materials provided with the distribution. |
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16 | * 3. Neither the name of the University nor the names of its contributors |
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17 | * may be used to endorse or promote products derived from this software |
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18 | * without specific prior written permission. |
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19 | * |
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20 | * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND |
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21 | * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE |
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22 | * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE |
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23 | * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE |
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24 | * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL |
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25 | * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS |
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26 | * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) |
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27 | * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT |
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28 | * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY |
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29 | * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF |
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30 | * SUCH DAMAGE. |
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31 | */ |
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32 | |
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33 | /* |
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34 | * Copyright (c) 2012-2014 ARM Ltd |
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35 | * All rights reserved. |
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36 | * |
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37 | * Redistribution and use in source and binary forms, with or without |
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38 | * modification, are permitted provided that the following conditions |
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39 | * are met: |
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40 | * 1. Redistributions of source code must retain the above copyright |
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41 | * notice, this list of conditions and the following disclaimer. |
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42 | * 2. Redistributions in binary form must reproduce the above copyright |
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43 | * notice, this list of conditions and the following disclaimer in the |
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44 | * documentation and/or other materials provided with the distribution. |
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45 | * 3. The name of the company may not be used to endorse or promote |
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46 | * products derived from this software without specific prior written |
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47 | * permission. |
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48 | * |
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49 | * THIS SOFTWARE IS PROVIDED BY ARM LTD ``AS IS'' AND ANY EXPRESS OR IMPLIED |
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50 | * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF |
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51 | * MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. |
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52 | * IN NO EVENT SHALL ARM LTD BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, |
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53 | * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED |
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54 | * TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR |
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55 | * PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF |
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56 | * LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING |
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57 | * NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS |
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58 | * SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. |
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59 | */ |
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60 | |
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61 | #ifndef VFPRINTF_LOCAL |
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62 | #define VFPRINTF_LOCAL |
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63 | |
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64 | #ifndef NO_FLOATING_POINT |
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65 | # define FLOATING_POINT |
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66 | #endif |
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67 | |
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68 | #define _NO_POS_ARGS |
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69 | #undef _WANT_IO_C99_FORMATS |
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70 | |
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71 | /* Currently a test is made to see if long double processing is warranted. |
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72 | This could be changed in the future should the _ldtoa_r code be |
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73 | preferred over _dtoa_r. */ |
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74 | #define _NO_LONGDBL |
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75 | |
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76 | #define _NO_LONGLONG |
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77 | |
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78 | #define _PRINTF_FLOAT_TYPE double |
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79 | |
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80 | #if defined (FLOATING_POINT) |
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81 | # include <locale.h> |
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82 | #endif |
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83 | #ifdef FLOATING_POINT |
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84 | # include <math.h> |
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85 | |
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86 | /* For %La, an exponent of 15 bits occupies the exponent character, |
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87 | a sign, and up to 5 digits. */ |
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88 | # define MAXEXPLEN 7 |
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89 | # define DEFPREC 6 |
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90 | |
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91 | extern char *_dtoa_r (struct _reent *, double, int, |
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92 | int, int *, int *, char **); |
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93 | |
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94 | # define _DTOA_R _dtoa_r |
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95 | # define FREXP frexp |
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96 | |
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97 | #endif /* FLOATING_POINT. */ |
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98 | |
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99 | /* BUF must be big enough for the maximum %#llo (assuming long long is |
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100 | at most 64 bits, this would be 23 characters), the maximum |
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101 | multibyte character %C, and the maximum default precision of %La |
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102 | (assuming long double is at most 128 bits with 113 bits of |
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103 | mantissa, this would be 29 characters). %e, %f, and %g use |
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104 | reentrant storage shared with mprec. All other formats that use |
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105 | buf get by with fewer characters. Making BUF slightly bigger |
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106 | reduces the need for malloc in %.*a and %S, when large precision or |
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107 | long strings are processed. |
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108 | The bigger size of 100 bytes is used on systems which allow number |
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109 | strings using the locale's grouping character. Since that's a multibyte |
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110 | value, we should use a conservative value. */ |
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111 | #define BUF 40 |
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112 | |
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113 | #define quad_t long |
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114 | #define u_quad_t unsigned long |
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115 | |
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116 | typedef quad_t * quad_ptr_t; |
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117 | typedef void *void_ptr_t; |
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118 | typedef char * char_ptr_t; |
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119 | typedef long * long_ptr_t; |
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120 | typedef int * int_ptr_t; |
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121 | typedef short * short_ptr_t; |
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122 | |
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123 | /* Macros for converting digits to letters and vice versa. */ |
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124 | #define to_digit(c) ((c) - '0') |
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125 | #define is_digit(c) ((unsigned)to_digit (c) <= 9) |
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126 | #define to_char(n) ((n) + '0') |
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127 | |
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128 | /* Flags used during conversion. */ |
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129 | #define ALT 0x001 /* Alternate form. */ |
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130 | #define LADJUST 0x002 /* Left adjustment. */ |
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131 | #define ZEROPAD 0x004 /* Zero (as opposed to blank) pad. */ |
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132 | #define PLUSSGN 0x008 /* Plus sign flag. */ |
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133 | #define SPACESGN 0x010 /* Space flag. */ |
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134 | #define HEXPREFIX 0x020 /* Add 0x or 0X prefix. */ |
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135 | #define SHORTINT 0x040 /* Short integer. */ |
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136 | #define LONGINT 0x080 /* Long integer. */ |
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137 | #define LONGDBL 0x100 /* Long double. */ |
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138 | /* ifdef _NO_LONGLONG, make QUADINT equivalent to LONGINT, so |
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139 | that %lld behaves the same as %ld, not as %d, as expected if: |
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140 | sizeof (long long) = sizeof long > sizeof int. */ |
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141 | #define QUADINT LONGINT |
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142 | #define FPT 0x400 /* Floating point number. */ |
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143 | /* Define as 0, to make SARG and UARG occupy fewer instructions. */ |
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144 | # define CHARINT 0 |
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145 | |
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146 | /* Macros to support positional arguments. */ |
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147 | #define GET_ARG(n, ap, type) (va_arg ((ap), type)) |
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148 | |
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149 | /* To extend shorts properly, we need both signed and unsigned |
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150 | argument extraction methods. Also they should be used in nano-vfprintf_i.c |
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151 | and nano-vfprintf_float.c only, since ap is a pointer to va_list. */ |
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152 | #define SARG(flags) \ |
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153 | (flags&LONGINT ? GET_ARG (N, (*ap), long) : \ |
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154 | flags&SHORTINT ? (long)(short)GET_ARG (N, (*ap), int) : \ |
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155 | flags&CHARINT ? (long)(signed char)GET_ARG (N, (*ap), int) : \ |
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156 | (long)GET_ARG (N, (*ap), int)) |
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157 | #define UARG(flags) \ |
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158 | (flags&LONGINT ? GET_ARG (N, (*ap), u_long) : \ |
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159 | flags&SHORTINT ? (u_long)(u_short)GET_ARG (N, (*ap), int) : \ |
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160 | flags&CHARINT ? (u_long)(unsigned char)GET_ARG (N, (*ap), int) : \ |
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161 | (u_long)GET_ARG (N, (*ap), u_int)) |
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162 | |
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163 | /* BEWARE, these `goto error' on error. And they are used |
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164 | in more than one functions. |
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165 | |
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166 | Following macros are each referred about twice in printf for integer, |
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167 | so it is not worth to rewrite them into functions. This situation may |
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168 | change in the future. */ |
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169 | #define PRINT(ptr, len) { \ |
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170 | if (pfunc (data, fp, (ptr), (len)) == EOF) \ |
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171 | goto error; \ |
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172 | } |
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173 | #define PAD(howmany, ch) { \ |
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174 | int temp_i = 0; \ |
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175 | while (temp_i < (howmany)) \ |
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176 | { \ |
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177 | if (pfunc (data, fp, &(ch), 1) == EOF) \ |
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178 | goto error; \ |
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179 | temp_i++; \ |
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180 | } \ |
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181 | } |
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182 | #define PRINTANDPAD(p, ep, len, ch) { \ |
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183 | int temp_n = (ep) - (p); \ |
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184 | if (temp_n > (len)) \ |
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185 | temp_n = (len); \ |
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186 | if (temp_n > 0) \ |
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187 | PRINT((p), temp_n); \ |
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188 | PAD((len) - (temp_n > 0 ? temp_n : 0), (ch)); \ |
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189 | } |
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190 | |
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191 | /* All data needed to decode format string are kept in below struct. */ |
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192 | struct _prt_data_t |
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193 | { |
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194 | int flags; /* Flags. */ |
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195 | int prec; /* Precision. */ |
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196 | int dprec; /* Decimal precision. */ |
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197 | int width; /* Width. */ |
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198 | int size; /* Size of converted field or string. */ |
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199 | int ret; /* Return value accumulator. */ |
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200 | char code; /* Current conversion specifier. */ |
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201 | char blank; /* Blank character. */ |
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202 | char zero; /* Zero character. */ |
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203 | char buf[BUF]; /* Output buffer for non-floating point number. */ |
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204 | char l_buf[3]; /* Sign&hex_prefix, "+/-" and "0x/X". */ |
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205 | #ifdef FLOATING_POINT |
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206 | _PRINTF_FLOAT_TYPE _double_; /* Double value. */ |
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207 | char expstr[MAXEXPLEN]; /* Buffer for exponent string. */ |
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208 | int lead; /* The sig figs before decimal or group sep. */ |
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209 | #endif |
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210 | }; |
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211 | |
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212 | extern int |
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213 | _printf_common (struct _reent *data, |
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214 | struct _prt_data_t *pdata, |
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215 | int *realsz, |
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216 | FILE *fp, |
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217 | int (*pfunc)(struct _reent *, FILE *, |
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218 | const char *, size_t len)); |
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219 | |
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220 | extern int |
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221 | _printf_i (struct _reent *data, struct _prt_data_t *pdata, FILE *fp, |
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222 | int (*pfunc)(struct _reent *, FILE *, const char *, size_t len), |
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223 | va_list *ap); |
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224 | |
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225 | /* Make _printf_float weak symbol, so it won't be linked in if target program |
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226 | does not need it. */ |
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227 | extern int |
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228 | _printf_float (struct _reent *data, |
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229 | struct _prt_data_t *pdata, |
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230 | FILE *fp, |
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231 | int (*pfunc)(struct _reent *, FILE *, |
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232 | const char *, size_t len), |
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233 | va_list *ap) _ATTRIBUTE((__weak__)); |
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234 | #endif |
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