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comparison packages/language/c/libc/current/tests/stdlib/realloc.c @ 0:3111d98ba7b3 ecos-v1_1-release

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Initial commit of eCos version 1.1
author jlarmour
date Tue, 11 May 1999 11:16:07 +0000
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children 443894e2e912
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-1:000000000000 0:3111d98ba7b3
1 //=================================================================
2 //
3 // realloc.c
4 //
5 // Testcase for C library realloc()
6 //
7 //=================================================================
8 //####COPYRIGHTBEGIN####
9 //
10 // -------------------------------------------
11 // The contents of this file are subject to the Cygnus eCos Public License
12 // Version 1.0 (the "License"); you may not use this file except in
13 // compliance with the License. You may obtain a copy of the License at
14 // http://sourceware.cygnus.com/ecos
15 //
16 // Software distributed under the License is distributed on an "AS IS"
17 // basis, WITHOUT WARRANTY OF ANY KIND, either express or implied. See the
18 // License for the specific language governing rights and limitations under
19 // the License.
20 //
21 // The Original Code is eCos - Embedded Cygnus Operating System, released
22 // September 30, 1998.
23 //
24 // The Initial Developer of the Original Code is Cygnus. Portions created
25 // by Cygnus are Copyright (C) 1998 Cygnus Solutions. All Rights Reserved.
26 // -------------------------------------------
27 //
28 //####COPYRIGHTEND####
29 //=================================================================
30 //#####DESCRIPTIONBEGIN####
31 //
32 // Author(s): jlarmour@cygnus.co.uk
33 // Contributors: jlarmour@cygnus.co.uk
34 // Date: 1998/8/31
35 // Description: Contains testcode for C library realloc() function
36 //
37 //
38 //####DESCRIPTIONEND####
39
40 // Declarations for test system:
41 //
42 // TESTCASE_TYPE=CYG_TEST_MODULE
43
44
45 // INCLUDES
46
47 #include <pkgconf/libc.h> // config header for C library so we can know size
48 // of malloc pool
49 #include <stdlib.h>
50 #include <cyg/infra/testcase.h>
51 #include <sys/cstartup.h> // C library initialisation
52
53
54 // FUNCTIONS
55
56 externC void
57 cyg_package_start( void )
58 {
59 #ifdef CYGPKG_LIBC
60 cyg_iso_c_start();
61 #else
62 (void)main(0, NULL);
63 #endif
64 } // cyg_package_start()
65
66
67 #if defined(CYGPKG_LIBC) && defined(CYGPKG_LIBC_MALLOC)
68
69 static const char alphabet[]="abcdefghijklmnopqrstuvwxyz{-}[]#';:@~!$^&*()"
70 "ABCDEFGHIJKLMNOPQRSTUVWXYZ1234567890";
71
72 static int
73 compare_with_alphabet( char *buf, int size, int offset )
74 {
75 int i, buf_offset;
76
77 for (i=offset, buf_offset=0;
78 buf_offset < size;
79 buf_offset++,i++ ) {
80
81 if ( i==sizeof(alphabet)-1 )
82 i=0;
83
84 if ( buf[buf_offset] != alphabet[i] ) {
85 CYG_TEST_FAIL( "buffer has not retained correct data!");
86 return 0; // fail
87 } // if
88 } // for
89
90 return 1; // success
91 } // compare_with_alphabet()
92
93 static int
94 fill_with_alphabet( char *buf, int size, int offset )
95 {
96 int i, buf_offset;
97
98 for (i=offset, buf_offset=0;
99 buf_offset < size;
100 buf_offset++,i++ ) {
101
102 if ( i==sizeof(alphabet)-1 )
103 i=0;
104
105 buf[buf_offset] = alphabet[i];
106
107 } // for
108
109 return compare_with_alphabet( buf, size, offset); // be sure
110 } // fill_with_alphabet()
111
112 #endif // if defined(CYGPKG_LIBC) && defined(CYGPKG_LIBC_MALLOC)
113
114 int
115 main( int argc, char *argv[] )
116 {
117 #if defined(CYGPKG_LIBC) && defined(CYGPKG_LIBC_MALLOC)
118 char *str;
119 int size = CYGNUM_LIBC_MALLOC_MEMPOOL_SIZE/2;
120 #endif
121
122 CYG_TEST_INIT();
123
124 CYG_TEST_INFO("Starting tests from testcase " __FILE__ " for C library "
125 "realloc() function");
126
127 #if defined(CYGPKG_LIBC) && defined(CYGPKG_LIBC_MALLOC)
128
129 str = (char *)realloc( NULL, size );
130 CYG_TEST_PASS_FAIL( str != NULL, "realloc doing only allocation");
131 CYG_TEST_PASS_FAIL( fill_with_alphabet( str, size, 0 ),
132 "allocation usability");
133
134 str = (char *)realloc( str, 0 );
135 CYG_TEST_PASS_FAIL( str == NULL, "realloc doing implicit free" );
136
137 str = (char *)realloc( NULL, size/2 );
138 CYG_TEST_PASS_FAIL( str != NULL, "realloc doing allocation to half size");
139 CYG_TEST_PASS_FAIL( fill_with_alphabet( str, size/2, 5 ),
140 "half allocation usability");
141
142 str = (char *)realloc( str, size );
143 CYG_TEST_PASS_FAIL( str != NULL,
144 "reallocing allocation back to normal size");
145 CYG_TEST_PASS_FAIL( compare_with_alphabet(str, size/2, 5),
146 "after realloc to normal size, old contents kept" );
147 CYG_TEST_PASS_FAIL( fill_with_alphabet( str, size, 3 ),
148 "reallocation normal size usability");
149
150 str = (char *)realloc( str, size/4 );
151 CYG_TEST_PASS_FAIL( str != NULL, "reallocing allocation to quarter size");
152 CYG_TEST_PASS_FAIL( compare_with_alphabet(str, size/4, 3),
153 "after realloc to quarter size, old contents kept" );
154 CYG_TEST_PASS_FAIL( fill_with_alphabet( str, size/4, 1 ),
155 "reallocation quarter size usability");
156
157 CYG_TEST_PASS_FAIL( realloc( str, size*100 ) == NULL,
158 "reallocing allocation that is too large" );
159 CYG_TEST_PASS_FAIL( compare_with_alphabet( str, size/4, 1 ),
160 "Checking old contents maintained despite failure" );
161
162 str = (char *)realloc( str, 0 );
163 CYG_TEST_PASS_FAIL( str == NULL, "realloc doing implicit free again" );
164
165
166 #else
167 CYG_TEST_PASS("Testing is not applicable to this configuration");
168 #endif // if defined(CYGPKG_LIBC) && defined(CYGPKG_LIBC_MALLOC)
169
170 CYG_TEST_FINISH("Finished tests from testcase " __FILE__ " for C library "
171 "realloc() function");
172 } // main()
173
174 // EOF realloc.c