Mercurial > octave
annotate liboctave/system/mach-info.cc @ 22197:e43d83253e28
refill multi-line macro definitions
Use the Emacs C++ mode style for line continuation markers in
multi-line macro definitions.
* make_int.cc, __dsearchn__.cc, __magick_read__.cc, besselj.cc,
bitfcns.cc, bsxfun.cc, cellfun.cc, data.cc, defun-dld.h, defun-int.h,
defun.h, det.cc, error.h, find.cc, gcd.cc, graphics.cc, interpreter.h,
jit-ir.h, jit-typeinfo.h, lookup.cc, ls-mat5.cc, max.cc, mexproto.h,
mxarray.in.h, oct-stream.cc, ordschur.cc, pr-output.cc, profiler.h,
psi.cc, regexp.cc, sparse-xdiv.cc, sparse-xpow.cc, tril.cc, txt-eng.h,
utils.cc, variables.cc, variables.h, xdiv.cc, xpow.cc, __glpk__.cc,
ov-base.cc, ov-base.h, ov-cell.cc, ov-ch-mat.cc, ov-classdef.cc,
ov-complex.cc, ov-cx-mat.cc, ov-cx-sparse.cc, ov-float.cc, ov-float.h,
ov-flt-complex.cc, ov-flt-cx-mat.cc, ov-flt-re-mat.cc,
ov-int-traits.h, ov-lazy-idx.h, ov-perm.cc, ov-re-mat.cc,
ov-re-sparse.cc, ov-scalar.cc, ov-scalar.h, ov-str-mat.cc,
ov-type-conv.h, ov.cc, ov.h, op-class.cc, op-int-conv.cc, op-int.h,
op-str-str.cc, ops.h, lex.ll, Array.cc, CMatrix.cc, CSparse.cc,
MArray.cc, MArray.h, MDiagArray2.cc, MDiagArray2.h, MSparse.h,
Sparse.cc, dMatrix.cc, dSparse.cc, fCMatrix.cc, fMatrix.cc,
idx-vector.cc, f77-fcn.h, quit.h, bsxfun-decl.h, bsxfun-defs.cc,
lo-specfun.cc, oct-convn.cc, oct-convn.h, oct-norm.cc, oct-norm.h,
oct-rand.cc, Sparse-op-decls.h, Sparse-op-defs.h, mx-inlines.cc,
mx-op-decl.h, mx-op-defs.h, mach-info.cc, oct-group.cc, oct-passwd.cc,
oct-syscalls.cc, oct-time.cc, data-conv.cc, kpse.cc, lo-ieee.h,
lo-macros.h, oct-cmplx.h, oct-glob.cc, oct-inttypes.cc,
oct-inttypes.h, oct-locbuf.h, oct-sparse.h, url-transfer.cc,
oct-conf-post.in.h, shared-fcns.h: Refill macro definitions.
author | John W. Eaton <jwe@octave.org> |
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date | Mon, 01 Aug 2016 12:40:18 -0400 |
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1960 | 1 /* |
2 | |
19697
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3 Copyright (C) 1996-2015 John W. Eaton |
1960 | 4 |
5 This file is part of Octave. | |
6 | |
7 Octave is free software; you can redistribute it and/or modify it | |
8 under the terms of the GNU General Public License as published by the | |
7016 | 9 Free Software Foundation; either version 3 of the License, or (at your |
10 option) any later version. | |
1960 | 11 |
12 Octave is distributed in the hope that it will be useful, but WITHOUT | |
13 ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or | |
14 FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License | |
15 for more details. | |
16 | |
17 You should have received a copy of the GNU General Public License | |
7016 | 18 along with Octave; see the file COPYING. If not, see |
19 <http://www.gnu.org/licenses/>. | |
1960 | 20 |
21 */ | |
22 | |
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23 #if defined (HAVE_CONFIG_H) |
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24 # include "config.h" |
1960 | 25 #endif |
26 | |
27 #include "f77-fcn.h" | |
2317 | 28 #include "lo-error.h" |
29 #include "mach-info.h" | |
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30 #include "singleton-cleanup.h" |
1960 | 31 |
32 extern "C" | |
33 { | |
5275 | 34 double F77_FUNC (d1mach, D1MACH) (const octave_idx_type&); |
1960 | 35 } |
36 | |
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37 namespace octave |
1960 | 38 { |
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39 mach_info *mach_info::instance = 0; |
1960 | 40 |
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41 union equiv |
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42 { |
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43 double d; |
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44 int i[2]; |
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45 }; |
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46 |
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47 struct |
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48 float_params |
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49 { |
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50 mach_info::float_format fp_fmt; |
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51 equiv fp_par[4]; |
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52 }; |
1960 | 53 |
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54 #define INIT_FLT_PAR(fp, fmt, sm1, sm2, lrg1, lrg2, rt1, rt2, dv1, dv2) \ |
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55 do \ |
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56 { \ |
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57 fp.fp_fmt = (fmt); \ |
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58 fp.fp_par[0].i[0] = (sm1); fp.fp_par[0].i[1] = (sm2); \ |
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59 fp.fp_par[1].i[0] = (lrg1); fp.fp_par[1].i[1] = (lrg2); \ |
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60 fp.fp_par[2].i[0] = (rt1); fp.fp_par[2].i[1] = (rt2); \ |
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61 fp.fp_par[3].i[0] = (dv1); fp.fp_par[3].i[1] = (dv2); \ |
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62 } \ |
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63 while (0) |
1960 | 64 |
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65 static int |
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66 equiv_compare (const equiv *std, const equiv *v, int len) |
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67 { |
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68 int i; |
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69 for (i = 0; i < len; i++) |
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70 if (v[i].i[0] != std[i].i[0] || v[i].i[1] != std[i].i[1]) |
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71 return 0; |
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72 return 1; |
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73 } |
1960 | 74 |
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75 static mach_info::float_format |
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76 get_float_format (void) |
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77 { |
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78 mach_info::float_format retval = mach_info::flt_fmt_unknown; |
1960 | 79 |
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80 float_params fp[5]; |
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81 |
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82 INIT_FLT_PAR (fp[0], mach_info::flt_fmt_ieee_big_endian, |
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83 1048576, 0, |
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84 2146435071, -1, |
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85 1017118720, 0, |
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86 1018167296, 0); |
1960 | 87 |
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88 INIT_FLT_PAR (fp[1], mach_info::flt_fmt_ieee_little_endian, |
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89 0, 1048576, |
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90 -1, 2146435071, |
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91 0, 1017118720, |
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92 0, 1018167296); |
1960 | 93 |
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94 INIT_FLT_PAR (fp[4], mach_info::flt_fmt_unknown, |
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95 0, 0, |
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96 0, 0, |
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97 0, 0, |
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98 0, 0); |
1960 | 99 |
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100 equiv mach_fp_par[4]; |
1960 | 101 |
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102 mach_fp_par[0].d = F77_FUNC (d1mach, D1MACH) (1); |
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103 mach_fp_par[1].d = F77_FUNC (d1mach, D1MACH) (2); |
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104 mach_fp_par[2].d = F77_FUNC (d1mach, D1MACH) (3); |
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105 mach_fp_par[3].d = F77_FUNC (d1mach, D1MACH) (4); |
1960 | 106 |
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107 int i = 0; |
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108 do |
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109 { |
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110 if (equiv_compare (fp[i].fp_par, mach_fp_par, 4)) |
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111 { |
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112 retval = fp[i].fp_fmt; |
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113 break; |
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114 } |
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115 } |
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116 while (fp[++i].fp_fmt != mach_info::flt_fmt_unknown); |
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118 return retval; |
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119 } |
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121 static bool |
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122 ten_little_endians (void) |
2317 | 123 { |
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124 // Are we little or big endian? From Harbison & Steele. |
2317 | 125 |
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126 union |
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127 { |
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128 long l; |
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129 char c[sizeof (long)]; |
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130 } u; |
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132 u.l = 1; |
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134 return (u.c[sizeof (long) - 1] == 1); |
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135 } |
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137 mach_info::mach_info (void) |
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138 : native_float_fmt (get_float_format ()), |
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139 big_chief (ten_little_endians ()) { } |
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141 bool |
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142 mach_info::instance_ok (void) |
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143 { |
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144 bool retval = true; |
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145 |
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146 if (! instance) |
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147 { |
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148 instance = new mach_info (); |
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150 if (instance) |
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151 singleton_cleanup_list::add (cleanup_instance); |
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152 } |
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154 if (! instance) |
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155 (*current_liboctave_error_handler) |
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156 ("unable to create command history object!"); |
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157 |
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158 return retval; |
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159 } |
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161 mach_info::float_format |
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162 mach_info::native_float_format (void) |
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163 { |
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164 return (instance_ok ()) |
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165 ? instance->native_float_fmt : mach_info::flt_fmt_unknown; |
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166 } |
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168 bool |
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169 mach_info::words_big_endian (void) |
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170 { |
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171 return (instance_ok ()) |
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172 ? instance->big_chief : false; |
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173 } |
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175 bool |
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176 mach_info::words_little_endian (void) |
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177 { |
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178 return (instance_ok ()) |
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179 ? (! instance->big_chief) : false; |
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180 } |
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182 mach_info::float_format |
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183 mach_info::string_to_float_format (const std::string& s) |
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184 { |
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185 mach_info::float_format retval = mach_info::flt_fmt_unknown; |
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187 if (s == "native" || s == "n") |
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188 retval = mach_info::native_float_format (); |
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189 else if (s == "ieee-be" || s == "b") |
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190 retval = mach_info::flt_fmt_ieee_big_endian; |
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191 else if (s == "ieee-le" || s == "l") |
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192 retval = mach_info::flt_fmt_ieee_little_endian; |
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193 else if (s == "unknown") |
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194 retval = mach_info::flt_fmt_unknown; |
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195 else |
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196 (*current_liboctave_error_handler) ("invalid architecture type specified"); |
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198 return retval; |
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199 } |
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201 std::string |
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202 mach_info::float_format_as_string (float_format flt_fmt) |
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203 { |
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204 std::string retval = "unknown"; |
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205 |
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206 switch (flt_fmt) |
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207 { |
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208 case flt_fmt_ieee_big_endian: |
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209 retval = "ieee-be"; |
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210 break; |
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212 case flt_fmt_ieee_little_endian: |
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213 retval = "ieee-le"; |
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214 break; |
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216 default: |
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217 break; |
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218 } |
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220 return retval; |
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221 } |
1960 | 222 } |