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annotate src/message_test.c @ 19736:4174c4da6ff7 v8.2.0424

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patch 8.2.0424: checking for wrong return value Commit: https://github.com/vim/vim/commit/97acfc781bdb7fa2838dc6e0e7f9952ea61bb2fd Author: Bram Moolenaar <Bram@vim.org> Date: Sun Mar 22 13:44:28 2020 +0100 patch 8.2.0424: checking for wrong return value Problem: Checking for wrong return value. (Tom) Solution: Invert the check and fix the test.
author Bram Moolenaar <Bram@vim.org>
date Sun, 22 Mar 2020 13:45:08 +0100
parents c617ba6413bb
children aadd1cae2ff5
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1 /* vi:set ts=8 sts=4 sw=4 noet:
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2 *
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3 * VIM - Vi IMproved by Bram Moolenaar
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4 *
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5 * Do ":help uganda" in Vim to read copying and usage conditions.
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6 * Do ":help credits" in Vim to see a list of people who contributed.
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7 * See README.txt for an overview of the Vim source code.
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8 */
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9
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10 /*
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11 * message_test.c: Unittests for message.c
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12 */
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13
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14 #undef NDEBUG
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15 #include <assert.h>
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16
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17 // Must include main.c because it contains much more than just main()
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18 #define NO_VIM_MAIN
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19 #include "main.c"
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20
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21 // This file has to be included because some of the tested functions are
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22 // static.
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23 #include "message.c"
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24
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25 #ifndef MIN
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26 # define MIN(x,y) ((x) < (y) ? (x) : (y))
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27 #endif
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28
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29 // These formats are not standard in C printf() function.
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30 // Use a global variable rather than a literal format to disable
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31 // -Wformat compiler warnings:
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32 //
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33 // - warning: '0' flag used with ‘%p’ gnu_printf format
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34 // - warning: format ‘%S’ expects argument of type ‘wchar_t *’, but argument 4 has type ‘char *’
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35 // - warning: unknown conversion type character ‘b’ in format
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36 //
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37 // These formats are in practise only used from vim script printf()
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38 // function and never as literals in C code.
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39 char *fmt_012p = "%012p";
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40 char *fmt_5S = "%5S";
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41 char *fmt_06b = "%06b";
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42
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43 /*
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44 * Test trunc_string().
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45 */
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46 static void
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47 test_trunc_string(void)
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48 {
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49 char_u *buf; /*allocated every time to find uninit errors */
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50 char_u *s;
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51
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52 // in place
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53 buf = alloc(40);
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54 STRCPY(buf, "text");
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55 trunc_string(buf, buf, 20, 40);
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56 assert(STRCMP(buf, "text") == 0);
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57 vim_free(buf);
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58
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59 buf = alloc(40);
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60 STRCPY(buf, "a short text");
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61 trunc_string(buf, buf, 20, 40);
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62 assert(STRCMP(buf, "a short text") == 0);
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63 vim_free(buf);
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64
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65 buf = alloc(40);
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66 STRCPY(buf, "a text tha just fits");
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67 trunc_string(buf, buf, 20, 40);
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68 assert(STRCMP(buf, "a text tha just fits") == 0);
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69 vim_free(buf);
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70
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71 buf = alloc(40);
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72 STRCPY(buf, "a text that nott fits");
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73 trunc_string(buf, buf, 20, 40);
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74 assert(STRCMP(buf, "a text t...nott fits") == 0);
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75 vim_free(buf);
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76
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77 // copy from string to buf
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78 buf = alloc(40);
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79 s = vim_strsave((char_u *)"text");
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80 trunc_string(s, buf, 20, 40);
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81 assert(STRCMP(buf, "text") == 0);
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82 vim_free(buf);
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83 vim_free(s);
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84
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85 buf = alloc(40);
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86 s = vim_strsave((char_u *)"a text that fits");
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87 trunc_string(s, buf, 34, 40);
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88 assert(STRCMP(buf, "a text that fits") == 0);
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89 vim_free(buf);
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90 vim_free(s);
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91
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92 buf = alloc(40);
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93 s = vim_strsave((char_u *)"a short text");
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94 trunc_string(s, buf, 20, 40);
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95 assert(STRCMP(buf, "a short text") == 0);
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96 vim_free(buf);
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97 vim_free(s);
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98
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99 buf = alloc(40);
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100 s = vim_strsave((char_u *)"a text tha just fits");
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101 trunc_string(s, buf, 20, 40);
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102 assert(STRCMP(buf, "a text tha just fits") == 0);
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103 vim_free(buf);
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104 vim_free(s);
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105
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106 buf = alloc(40);
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107 s = vim_strsave((char_u *)"a text that nott fits");
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108 trunc_string(s, buf, 20, 40);
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109 assert(STRCMP(buf, "a text t...nott fits") == 0);
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110 vim_free(buf);
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111 vim_free(s);
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112 }
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113
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114 /*
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115 * Test vim_snprintf() with a focus on checking that truncation is
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116 * correct when buffer is small, since it cannot be tested from
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117 * vim scrip tests. Check that:
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118 * - no buffer overflows happens (with valgrind or asan)
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119 * - output string is always NUL terminated.
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120 *
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121 * Not all formats of vim_snprintf() are checked here. They are
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122 * checked more exhaustively in Test_printf*() vim script tests.
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123 */
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124 static void
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125 test_vim_snprintf(void)
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126 {
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127 int n;
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128 size_t bsize;
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129 int bsize_int;
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130 char *ptr = (char *)0x87654321;
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131
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132 // Loop on various buffer sizes to make sure that truncation of
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133 // vim_snprintf() is correct.
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134 for (bsize = 0; bsize < 15; ++bsize)
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135 {
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136 bsize_int = (int)bsize - 1;
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137
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138 // buf is the heap rather than in the stack
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139 // so valgrind can detect buffer overflows if any.
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140 // Use malloc() rather than alloc() as test checks with 0-size
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141 // buffer and its content should then never be used.
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142 char *buf = malloc(bsize);
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143
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144 n = vim_snprintf(buf, bsize, "%d", 1234567);
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145 assert(n == 7);
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146 assert(bsize == 0 || STRNCMP(buf, "1234567", bsize_int) == 0);
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147 assert(bsize == 0 || buf[MIN(n, bsize_int)] == '\0');
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148
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149 n = vim_snprintf(buf, bsize, "%ld", 1234567L);
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150 assert(n == 7);
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151 assert(bsize == 0 || STRNCMP(buf, "1234567", bsize_int) == 0);
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152 assert(bsize == 0 || buf[MIN(n, bsize_int)] == '\0');
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153
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154 n = vim_snprintf(buf, bsize, "%9ld", 1234567L);
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155 assert(n == 9);
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156 assert(bsize == 0 || STRNCMP(buf, " 1234567", bsize_int) == 0);
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157 assert(bsize == 0 || buf[MIN(n, bsize_int)] == '\0');
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158
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159 n = vim_snprintf(buf, bsize, "%-9ld", 1234567L);
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160 assert(n == 9);
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161 assert(bsize == 0 || STRNCMP(buf, "1234567 ", bsize_int) == 0);
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162 assert(bsize == 0 || buf[MIN(n, bsize_int)] == '\0');
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163
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164 n = vim_snprintf(buf, bsize, "%x", 0xdeadbeef);
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165 assert(n == 8);
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166 assert(bsize == 0 || STRNCMP(buf, "deadbeef", bsize_int) == 0);
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167 assert(bsize == 0 || buf[MIN(n, bsize_int)] == '\0');
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168
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169 n = vim_snprintf(buf, bsize, fmt_06b, (uvarnumber_T)12);
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170 assert(n == 6);
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171 assert(bsize == 0 || STRNCMP(buf, "001100", bsize_int) == 0);
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172 assert(bsize == 0 || buf[MIN(n, bsize_int)] == '\0');
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173
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174 #ifdef FEAT_FLOAT
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175 n = vim_snprintf(buf, bsize, "%f", 1.234);
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176 assert(n == 8);
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177 assert(bsize == 0 || STRNCMP(buf, "1.234000", bsize_int) == 0);
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178 assert(bsize == 0 || buf[MIN(n, bsize_int)] == '\0');
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179
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180 n = vim_snprintf(buf, bsize, "%e", 1.234);
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181 assert(n == 12);
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182 assert(bsize == 0 || STRNCMP(buf, "1.234000e+00", bsize_int) == 0);
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183 assert(bsize == 0 || buf[MIN(n, bsize_int)] == '\0');
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184
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185 n = vim_snprintf(buf, bsize, "%f", 0.0/0.0);
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186 assert(n == 3);
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187 assert(bsize == 0 || STRNCMP(buf, "nan", bsize_int) == 0);
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188 assert(bsize == 0 || buf[MIN(n, bsize_int)] == '\0');
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189
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190 n = vim_snprintf(buf, bsize, "%f", 1.0/0.0);
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191 assert(n == 3);
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192 assert(bsize == 0 || STRNCMP(buf, "inf", bsize_int) == 0);
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193 assert(bsize == 0 || buf[MIN(n, bsize_int)] == '\0');
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194
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195 n = vim_snprintf(buf, bsize, "%f", -1.0/0.0);
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196 assert(n == 4);
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197 assert(bsize == 0 || STRNCMP(buf, "-inf", bsize_int) == 0);
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198 assert(bsize == 0 || buf[MIN(n, bsize_int)] == '\0');
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199
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200 n = vim_snprintf(buf, bsize, "%f", -0.0);
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201 assert(n == 9);
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202 assert(bsize == 0 || STRNCMP(buf, "-0.000000", bsize_int) == 0);
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203 assert(bsize == 0 || buf[MIN(n, bsize_int)] == '\0');
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204 #endif
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205
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206 n = vim_snprintf(buf, bsize, "%s", "漢語");
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207 assert(n == 6);
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208 assert(bsize == 0 || STRNCMP(buf, "漢語", bsize_int) == 0);
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209 assert(bsize == 0 || buf[MIN(n, bsize_int)] == '\0');
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210
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211 n = vim_snprintf(buf, bsize, "%8s", "漢語");
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212 assert(n == 8);
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213 assert(bsize == 0 || STRNCMP(buf, " 漢語", bsize_int) == 0);
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214 assert(bsize == 0 || buf[MIN(n, bsize_int)] == '\0');
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215
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216 n = vim_snprintf(buf, bsize, "%-8s", "漢語");
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217 assert(n == 8);
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218 assert(bsize == 0 || STRNCMP(buf, "漢語 ", bsize_int) == 0);
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219 assert(bsize == 0 || buf[MIN(n, bsize_int)] == '\0');
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220
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221 n = vim_snprintf(buf, bsize, "%.3s", "漢語");
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222 assert(n == 3);
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223 assert(bsize == 0 || STRNCMP(buf, "漢", bsize_int) == 0);
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224 assert(bsize == 0 || buf[MIN(n, bsize_int)] == '\0');
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225
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226 n = vim_snprintf(buf, bsize, fmt_5S, "foo");
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227 assert(n == 5);
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228 assert(bsize == 0 || STRNCMP(buf, " foo", bsize_int) == 0);
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229 assert(bsize == 0 || buf[MIN(n, bsize_int)] == '\0');
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230
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231 n = vim_snprintf(buf, bsize, "%%%%%%");
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232 assert(n == 3);
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233 assert(bsize == 0 || STRNCMP(buf, "%%%", bsize_int) == 0);
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234 assert(bsize == 0 || buf[MIN(n, bsize_int)] == '\0');
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235
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236 n = vim_snprintf(buf, bsize, "%c%c", 1, 2);
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237 assert(n == 2);
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238 assert(bsize == 0 || STRNCMP(buf, "\x01\x02", bsize_int) == 0);
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239 assert(bsize == 0 || buf[MIN(n, bsize_int)] == '\0');
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240
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241 // %p format is not tested in vim script tests Test_printf*()
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242 // as it only makes sense in C code.
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243 // NOTE: SunOS libc doesn't use the prefix "0x" on %p.
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244 #ifdef SUN_SYSTEM
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245 # define PREFIX_LEN 0
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246 # define PREFIX_STR1 ""
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247 # define PREFIX_STR2 "00"
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248 #else
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249 # define PREFIX_LEN 2
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250 # define PREFIX_STR1 "0x"
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251 # define PREFIX_STR2 "0x"
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252 #endif
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253 n = vim_snprintf(buf, bsize, "%p", ptr);
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254 assert(n == 8 + PREFIX_LEN);
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255 assert(bsize == 0
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256 || STRNCMP(buf, PREFIX_STR1 "87654321", bsize_int) == 0);
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257 assert(bsize == 0 || buf[MIN(n, bsize_int)] == '\0');
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258
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259 n = vim_snprintf(buf, bsize, fmt_012p, ptr);
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260 assert(n == 12);
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261 assert(bsize == 0
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262 || STRNCMP(buf, PREFIX_STR2 "0087654321", bsize_int) == 0);
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263 assert(bsize == 0 || buf[MIN(n, bsize_int)] == '\0');
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264
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265 free(buf);
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266 }
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267 }
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268
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269 int
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270 main(int argc, char **argv)
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271 {
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272 vim_memset(&params, 0, sizeof(params));
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273 params.argc = argc;
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274 params.argv = argv;
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275 common_init(&params);
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276
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277 set_option_value((char_u *)"encoding", 0, (char_u *)"utf-8", 0);
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278 init_chartab();
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279 test_trunc_string();
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280 test_vim_snprintf();
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281
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282 set_option_value((char_u *)"encoding", 0, (char_u *)"latin1", 0);
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283 init_chartab();
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284 test_trunc_string();
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285 test_vim_snprintf();
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286
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287 return 0;
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288 }