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annotate packages/language/c/libc/setjmp/current/tests/setjmp.c @ 115:6ed91473a1cd ecos-sw-2000-08-21

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Merge from eCos master repository on 2000-08-21-22:40:54-BST
author jlarmour
date Fri, 25 Aug 2000 17:32:38 +0000
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children e0c0827131d1
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1 //===========================================================================
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2 //
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3 // setjmp.c
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4 //
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5 // Tests for ANSI standard setjmp() and longjmp() functions
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6 //
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7 //===========================================================================
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8 //####COPYRIGHTBEGIN####
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9 //
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10 // -------------------------------------------
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11 // The contents of this file are subject to the Red Hat eCos Public License
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12 // Version 1.1 (the "License"); you may not use this file except in
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13 // compliance with the License. You may obtain a copy of the License at
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14 // http://www.redhat.com/
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15 //
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16 // Software distributed under the License is distributed on an "AS IS"
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17 // basis, WITHOUT WARRANTY OF ANY KIND, either express or implied. See the
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18 // License for the specific language governing rights and limitations under
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19 // the License.
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20 //
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21 // The Original Code is eCos - Embedded Configurable Operating System,
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22 // released September 30, 1998.
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23 //
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24 // The Initial Developer of the Original Code is Red Hat.
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25 // Portions created by Red Hat are
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26 // Copyright (C) 1998, 1999, 2000 Red Hat, Inc.
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27 // All Rights Reserved.
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28 // -------------------------------------------
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29 //
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30 //####COPYRIGHTEND####
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31 //===========================================================================
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32 //#####DESCRIPTIONBEGIN####
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33 //
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34 // Author(s): jlarmour
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35 // Contributors:
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36 // Date: 2000-04-30
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37 // Purpose:
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38 // Description: Contains test code for C library setjmp() and longjmp()
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39 // functions
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40 // The ANSI standard allows setjmp calls to be used ONLY in the
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41 // forms:
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42 // while (setjmp (jumpbuf))
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43 // while (setjmp (jumpbuf) < 42)
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44 // while (!setjmp (jumpbuf))
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45 // setjmp (jumpbuf);
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46 // result = setjmp(jumpbuf);
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47 //
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48 // Or "while" can also be "if" or "switch" or the implicit
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49 // while of "for".
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50 // Usage:
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51 //
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52 //####DESCRIPTIONEND####
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53 //
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54 //===========================================================================
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55
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56 // INCLUDES
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57
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58 #include <cyg/infra/testcase.h> // Test infrastructure header
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59 #include <setjmp.h> // Header for what we're testing
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60
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61 // GLOBALS
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62
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63 static jmp_buf jbuf, jbuf2, jbuf3;
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64
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65
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66 // FUNCTIONS
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67
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68 static int
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69 test_fun( void )
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70 {
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71 volatile int i=0; // add something to the stack to confuse things
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72
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73 longjmp( jbuf, 5 );
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74 i+=5;
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75
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76 return i;
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77 } // test_fun();
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78
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79
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80 int
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81 main( int argc, char *argv[] )
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82 {
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83 static int static_i=0; // temporary variable
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84 int j=0; // ditto
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85 volatile int vol_k=0, vol_l=0; // ditto
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86
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87 CYG_TEST_INIT();
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88
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89 CYG_TEST_INFO("Starting tests from testcase " __FILE__ " for C library "
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90 "setjmp()/longjmp() functions");
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91
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92 // Test 1
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93 if ( setjmp(jbuf) == 0 )
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94 {
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95 static_i=1;
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96 longjmp(jbuf, 1);
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97 static_i=2;
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98 } // if
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99
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100 CYG_TEST_PASS_FAIL( static_i==1, "Simple test 1" );
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101
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102 // Test 2
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103 j=2;
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104
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105 if ( !setjmp(jbuf) )
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106 {
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107 static_i=3;
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108 longjmp(jbuf, 1);
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109 static_i=4;
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110 j=3;
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111 } // if
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112
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113 CYG_TEST_PASS_FAIL( (static_i==3) && (j==2), "Simple test 2" );
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114
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115 // Test 3
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116
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117 static_i=0;
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118 switch (setjmp(jbuf))
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119 {
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120 case 0:
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121 static_i++;
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122 if (static_i!=1)
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123 CYG_TEST_FAIL("Test of value passed to longjmp()");
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124 else
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125 longjmp(jbuf, 5);
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126 break;
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127 case 5:
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128 static_i++;
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129 CYG_TEST_PASS_FAIL( (static_i==2),"Test of value passed to longjmp()");
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130 break;
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131 default:
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132 CYG_TEST_FAIL( "Test of value passed to longjmp()");
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133 break;
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134 } // switch
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135
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136 // Test 3
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137
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138 static_i=0;
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139 switch (setjmp(jbuf))
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140 {
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141 case 0:
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142 static_i++;
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143 if (static_i!=1)
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144 CYG_TEST_FAIL("Test of value passed to longjmp() being 0");
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145 else
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146 longjmp(jbuf, 0);
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147 break;
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148 case 1:
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149 static_i++;
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150 CYG_TEST_PASS_FAIL( (static_i==2),
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151 "Test of value passed to longjmp() being 0");
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152 break;
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153 default:
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154 CYG_TEST_FAIL( "Test of value passed to longjmp() being 0");
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155 break;
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156 } // switch
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157
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158
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159 // Test 4
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160
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161 vol_k=0;
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162 static_i=0;
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163 setjmp( jbuf );
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164
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165 static_i++;
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166 setjmp( jbuf2 );
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167
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168 static_i++;
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169 setjmp( jbuf3 );
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170
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171 if (vol_k==0)
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172 {
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173 vol_k++;
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174 longjmp( jbuf2, 1 );
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175 }
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176 else
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177 {
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178 CYG_TEST_PASS_FAIL( (vol_k==1) && (static_i==3), "Multiple setjmp's" );
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179 }
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180
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181 // Test 5
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182
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183 vol_k=3;
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184 if ( (j=setjmp(jbuf)) == 0 )
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185 {
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186 volatile int l; // put something extra on the stack to confuse things
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187
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188 vol_k++;
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189 l=test_fun();
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190 l++;
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191 vol_k=l;
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192 } // if
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193
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194 CYG_TEST_PASS_FAIL( (j==5) && (vol_k==4), "longjmp from a function" );
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195
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196 // Test 6
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197
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198 vol_k=0;
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199
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200 vol_l=setjmp(jbuf);
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201
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202 vol_k += 3;
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203
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204 if (!vol_l)
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205 test_fun();
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206
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207 vol_l=setjmp(jbuf);
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208
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209 vol_k += 7;
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210
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211 if (!vol_l)
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212 test_fun();
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213
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214 CYG_TEST_PASS_FAIL ( (vol_k == 20), "Repeated longjmps from a function" );
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215
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216 // CYG_TEST_NA("Testing is not applicable to this configuration");
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217
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218 CYG_TEST_FINISH("Finished tests from testcase " __FILE__ " for C library "
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219 "setjmp()/longjmp() functions");
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220
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221 } // main()
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222
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223 // EOF setjmp.c