1 | /* |
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2 | * Copyright (c) 2011 ARM Ltd |
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3 | * All rights reserved. |
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4 | * |
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5 | * Redistribution and use in source and binary forms, with or without |
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6 | * modification, are permitted provided that the following conditions |
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7 | * are met: |
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8 | * 1. Redistributions of source code must retain the above copyright |
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9 | * notice, this list of conditions and the following disclaimer. |
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10 | * 2. Redistributions in binary form must reproduce the above copyright |
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11 | * notice, this list of conditions and the following disclaimer in the |
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12 | * documentation and/or other materials provided with the distribution. |
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13 | * 3. The name of the company may not be used to endorse or promote |
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14 | * products derived from this software without specific prior written |
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15 | * permission. |
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16 | * |
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17 | * THIS SOFTWARE IS PROVIDED BY ARM LTD ``AS IS'' AND ANY EXPRESS OR IMPLIED |
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18 | * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF |
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19 | * MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. |
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20 | * IN NO EVENT SHALL ARM LTD BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, |
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21 | * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED |
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22 | * TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR |
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23 | * PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF |
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24 | * LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING |
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25 | * NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS |
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26 | * SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. |
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27 | */ |
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28 | |
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29 | #include <string.h> |
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30 | #include <stdlib.h> |
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31 | #include <stdio.h> |
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32 | #include <stdarg.h> |
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33 | |
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34 | /* The macro LONG_TEST controls whether a short or a more comprehensive test |
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35 | of strcmp should be performed. */ |
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36 | #ifdef LONG_TEST |
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37 | #ifndef BUFF_SIZE |
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38 | #define BUFF_SIZE 1024 |
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39 | #endif |
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40 | |
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41 | #ifndef MAX_BLOCK_SIZE |
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42 | #define MAX_BLOCK_SIZE 128 |
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43 | #endif |
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44 | |
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45 | #ifndef MAX_OFFSET |
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46 | #define MAX_OFFSET 3 |
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47 | #endif |
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48 | |
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49 | #ifndef MAX_DIFF |
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50 | #define MAX_DIFF 8 |
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51 | #endif |
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52 | |
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53 | #ifndef MAX_LEN |
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54 | #define MAX_LEN 8 |
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55 | #endif |
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56 | |
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57 | #ifndef MAX_ZEROS |
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58 | #define MAX_ZEROS 8 |
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59 | #endif |
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60 | #else /* not defined LONG_TEST */ |
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61 | #ifndef BUFF_SIZE |
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62 | #define BUFF_SIZE 1024 |
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63 | #endif |
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64 | |
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65 | #ifndef MAX_BLOCK_SIZE |
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66 | #define MAX_BLOCK_SIZE 64 |
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67 | #endif |
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68 | |
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69 | #ifndef MAX_OFFSET |
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70 | #define MAX_OFFSET 3 |
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71 | #endif |
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72 | |
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73 | #ifndef MAX_DIFF |
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74 | #define MAX_DIFF 4 |
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75 | #endif |
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76 | |
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77 | #ifndef MAX_LEN |
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78 | #define MAX_LEN 4 |
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79 | #endif |
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80 | |
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81 | #ifndef MAX_ZEROS |
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82 | #define MAX_ZEROS 4 |
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83 | #endif |
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84 | #endif /* not defined LONG_TEST */ |
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85 | |
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86 | #if (MAX_OFFSET >= 26) |
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87 | #error "MAX_OFFSET >= 26" |
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88 | #endif |
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89 | #if (MAX_OFFSET + MAX_BLOCK_SIZE + MAX_DIFF + MAX_LEN + MAX_ZEROS >= BUFF_SIZE) |
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90 | #error "Buffer overrun: MAX_OFFSET + MAX_BLOCK_SIZE + MAX_DIFF + MAX_LEN + MAX_ZEROS >= BUFF_SIZE." |
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91 | #endif |
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92 | |
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93 | |
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94 | #define TOO_MANY_ERRORS 11 |
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95 | int errors = 0; |
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96 | |
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97 | const char *testname = "strcmp"; |
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98 | |
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99 | void |
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100 | print_error (char const* msg, ...) |
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101 | { |
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102 | errors++; |
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103 | if (errors == TOO_MANY_ERRORS) |
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104 | { |
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105 | fprintf (stderr, "Too many errors.\n"); |
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106 | } |
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107 | else if (errors < TOO_MANY_ERRORS) |
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108 | { |
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109 | va_list ap; |
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110 | va_start (ap, msg); |
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111 | vfprintf (stderr, msg, ap); |
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112 | va_end (ap); |
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113 | } |
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114 | else |
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115 | { |
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116 | /* Further errors omitted. */ |
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117 | } |
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118 | } |
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119 | |
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120 | void |
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121 | printbuf (char *buf, char *name) |
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122 | { |
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123 | int i; |
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124 | printf ("\n %s=", name); |
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125 | for (i = 0; i < BUFF_SIZE; i++) |
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126 | if (buf[i] != 0) |
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127 | printf ("(%d,%c)", i, buf[i]); |
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128 | else |
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129 | printf ("(%d,%s)", i, "\\0"); |
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130 | printf ("\n"); |
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131 | } |
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132 | |
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133 | int |
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134 | main (void) |
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135 | { |
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136 | /* Allocate buffers to read and write from. */ |
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137 | char src[BUFF_SIZE], dest[BUFF_SIZE]; |
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138 | |
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139 | /* Fill the source buffer with non-null values, reproducable random data. */ |
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140 | srand (1539); |
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141 | int i, j, zeros; |
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142 | unsigned sa; |
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143 | unsigned da; |
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144 | unsigned n, m, len; |
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145 | char *p; |
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146 | int ret; |
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147 | |
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148 | /* Make calls to strcmp with block sizes ranging between 1 and |
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149 | MAX_BLOCK_SIZE bytes, aligned and misaligned source and destination. */ |
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150 | for (sa = 0; sa <= MAX_OFFSET; sa++) |
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151 | for (da = 0; da <= MAX_OFFSET; da++) |
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152 | for (n = 1; n <= MAX_BLOCK_SIZE; n++) |
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153 | { |
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154 | for (m = 1; m < n + MAX_DIFF; m++) |
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155 | for (len = 0; len < MAX_LEN; len++) |
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156 | for (zeros = 1; zeros < MAX_ZEROS; zeros++) |
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157 | { |
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158 | if (n - m > MAX_DIFF) |
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159 | continue; |
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160 | /* Make a copy of the source. */ |
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161 | for (i = 0; i < BUFF_SIZE; i++) |
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162 | { |
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163 | src[i] = 'A' + (i % 26); |
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164 | dest[i] = src[i]; |
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165 | } |
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166 | memcpy (dest + da, src + sa, n); |
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167 | |
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168 | /* Make src 0-terminated. */ |
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169 | p = src + sa + n - 1; |
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170 | for (i = 0; i < zeros; i++) |
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171 | { |
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172 | *p++ = '\0'; |
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173 | } |
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174 | |
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175 | /* Modify dest. */ |
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176 | p = dest + da + m - 1; |
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177 | for (j = 0; j < len; j++) |
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178 | *p++ = 'x'; |
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179 | /* Make dest 0-terminated. */ |
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180 | *p = '\0'; |
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181 | |
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182 | ret = strcmp (src + sa, dest + da); |
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183 | |
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184 | /* Check return value. */ |
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185 | if (n == m) |
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186 | { |
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187 | if (len == 0) |
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188 | { |
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189 | if (ret != 0) |
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190 | { |
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191 | print_error ("\nFailed: after %s of %u bytes " |
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192 | "with src_align %u and dst_align %u, " |
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193 | "dest after %d bytes is modified for %d bytes, " |
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194 | "return value is %d, expected 0.\n", |
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195 | testname, n, sa, da, m, len, ret); |
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196 | } |
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197 | } |
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198 | else |
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199 | { |
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200 | if (ret >= 0) |
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201 | print_error ("\nFailed: after %s of %u bytes " |
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202 | "with src_align %u and dst_align %u, " |
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203 | "dest after %d bytes is modified for %d bytes, " |
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204 | "return value is %d, expected negative.\n", |
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205 | testname, n, sa, da, m, len, ret); |
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206 | } |
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207 | } |
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208 | else if (m > n) |
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209 | { |
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210 | if (ret >= 0) |
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211 | { |
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212 | print_error ("\nFailed: after %s of %u bytes " |
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213 | "with src_align %u and dst_align %u, " |
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214 | "dest after %d bytes is modified for %d bytes, " |
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215 | "return value is %d, expected negative.\n", |
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216 | testname, n, sa, da, m, len, ret); |
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217 | } |
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218 | } |
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219 | else /* m < n */ |
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220 | { |
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221 | if (len == 0) |
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222 | { |
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223 | if (ret <= 0) |
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224 | print_error ("\nFailed: after %s of %u bytes " |
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225 | "with src_align %u and dst_align %u, " |
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226 | "dest after %d bytes is modified for %d bytes, " |
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227 | "return value is %d, expected positive.\n", |
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228 | testname, n, sa, da, m, len, ret); |
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229 | } |
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230 | else |
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231 | { |
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232 | if (ret >= 0) |
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233 | print_error ("\nFailed: after %s of %u bytes " |
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234 | "with src_align %u and dst_align %u, " |
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235 | "dest after %d bytes is modified for %d bytes, " |
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236 | "return value is %d, expected negative.\n", |
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237 | testname, n, sa, da, m, len, ret); |
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238 | } |
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239 | } |
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240 | } |
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241 | } |
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242 | |
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243 | /* Check some corner cases. */ |
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244 | src[1] = 'A'; |
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245 | dest[1] = 'A'; |
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246 | src[2] = 'B'; |
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247 | dest[2] = 'B'; |
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248 | src[3] = 'C'; |
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249 | dest[3] = 'C'; |
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250 | src[4] = '\0'; |
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251 | dest[4] = '\0'; |
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252 | |
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253 | src[0] = 0xc1; |
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254 | dest[0] = 0x41; |
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255 | ret = strcmp (src, dest); |
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256 | if (ret <= 0) |
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257 | print_error ("\nFailed: expected positive, return %d\n", ret); |
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258 | |
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259 | src[0] = 0x01; |
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260 | dest[0] = 0x82; |
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261 | ret = strcmp (src, dest); |
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262 | if (ret >= 0) |
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263 | print_error ("\nFailed: expected negative, return %d\n", ret); |
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264 | |
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265 | dest[0] = src[0] = 'D'; |
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266 | src[3] = 0xc1; |
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267 | dest[3] = 0x41; |
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268 | ret = strcmp (src, dest); |
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269 | if (ret <= 0) |
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270 | print_error ("\nFailed: expected positive, return %d\n", ret); |
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271 | |
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272 | src[3] = 0x01; |
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273 | dest[3] = 0x82; |
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274 | ret = strcmp (src, dest); |
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275 | if (ret >= 0) |
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276 | print_error ("\nFailed: expected negative, return %d\n", ret); |
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277 | |
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278 | printf ("\n"); |
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279 | if (errors != 0) |
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280 | { |
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281 | printf ("ERROR. FAILED.\n"); |
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282 | abort (); |
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283 | } |
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284 | exit (0); |
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285 | } |
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