1 | // =============================================================== // |
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2 | // // |
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3 | // File : arb_misc.cxx // |
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4 | // Purpose : misc that doesnt fit elsewhere // |
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5 | // // |
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6 | // Coded by Ralf Westram (coder@reallysoft.de) in October 2012 // |
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7 | // Institute of Microbiology (Technical University Munich) // |
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8 | // http://www.arb-home.de/ // |
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9 | // // |
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10 | // =============================================================== // |
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11 | |
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12 | #include "arb_misc.h" |
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13 | #include "arb_msg.h" |
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14 | #include "arb_file.h" |
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15 | #include "arb_string.h" |
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16 | |
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17 | #include <cmath> |
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18 | |
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19 | // AISC_MKPT_PROMOTE:#ifndef _GLIBCXX_CSTDLIB |
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20 | // AISC_MKPT_PROMOTE:#include <cstdlib> |
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21 | // AISC_MKPT_PROMOTE:#endif |
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22 | |
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23 | const char *GBS_readable_size(unsigned long long size, const char *unit_suffix) { |
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24 | // return human readable size information |
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25 | // returned string is maximal 6+strlen(unit_suffix) characters long |
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26 | // (using "b" as 'unit_suffix' produces '### b', '### Mb' etc) |
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27 | |
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28 | if (size<1000) return GBS_global_string("%llu %s", size, unit_suffix); |
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29 | |
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30 | const char *units = "kMGTPEZY"; // kilo, Mega, Giga, Tera, ... should be enough forever |
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31 | int i; |
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32 | |
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33 | for (i = 0; units[i]; ++i) { |
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34 | char unit = units[i]; |
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35 | if (size<1000*1024) { |
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36 | double amount = size/(double)1024; |
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37 | if (amount<10.0) return GBS_global_string("%4.2f %c%s", amount+0.005, unit, unit_suffix); |
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38 | if (amount<100.0) return GBS_global_string("%4.1f %c%s", amount+0.05, unit, unit_suffix); |
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39 | return GBS_global_string("%i %c%s", (int)(amount+0.5), unit, unit_suffix); |
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40 | } |
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41 | size /= 1024; // next unit |
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42 | } |
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43 | return GBS_global_string("MUCH %s", unit_suffix); |
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44 | } |
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45 | |
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46 | const char *GBS_readable_timediff(size_t seconds) { |
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47 | size_t mins = seconds/60; seconds -= mins * 60; |
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48 | size_t hours = mins/60; mins -= hours * 60; |
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49 | size_t days = hours/24; hours -= days * 24; |
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50 | |
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51 | const int MAXPRINT = 40; |
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52 | int printed = 0; |
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53 | static char buffer[MAXPRINT+1]; |
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54 | |
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55 | if (days>0) printed += sprintf(buffer+printed, "%zud", days); |
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56 | if (printed || hours>0) printed += sprintf(buffer+printed, "%zuh", hours); |
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57 | if (printed || mins>0) printed += sprintf(buffer+printed, "%zum", mins); |
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58 | |
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59 | printed += sprintf(buffer+printed, "%zus", seconds); |
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60 | |
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61 | arb_assert(printed>0 && printed<MAXPRINT); |
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62 | |
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63 | return buffer; |
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64 | } |
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65 | |
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66 | const char *ARB_float_2_ascii(const float f) { |
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67 | /*! calculate the "best" ascii representation for float 'f' |
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68 | * - smaller conversion error is better |
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69 | * - shorter representation is better (for equal conversion errors) |
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70 | */ |
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71 | |
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72 | const int MAXSIZE = 50; |
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73 | static char result[MAXSIZE]; |
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74 | char buffer[MAXSIZE]; |
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75 | |
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76 | int printed_e = snprintf(result, MAXSIZE, "%e", f); arb_assert(printed_e<MAXSIZE); |
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77 | float back_e = strtof(result, NULp); |
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78 | float diff_e = fabsf(f-back_e); |
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79 | |
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80 | int printed_g = snprintf(buffer, MAXSIZE, "%g", f); arb_assert(printed_g<MAXSIZE); |
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81 | float back_g = strtof(buffer, NULp); |
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82 | float diff_g = fabsf(f-back_g); |
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83 | |
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84 | if (diff_g<diff_e || (diff_g == diff_e && printed_g<printed_e)) { |
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85 | printed_e = printed_g; |
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86 | back_e = back_g; |
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87 | diff_e = diff_g; |
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88 | memcpy(result, buffer, printed_g+1); |
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89 | } |
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90 | |
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91 | int printed_f = snprintf(buffer, MAXSIZE, "%f", f); arb_assert(printed_f<MAXSIZE); |
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92 | float back_f = strtof(buffer, NULp); |
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93 | float diff_f = fabsf(f-back_f); |
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94 | |
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95 | if (diff_f<diff_e || (diff_f == diff_e && printed_f<printed_e)) { |
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96 | memcpy(result, buffer, printed_f+1); |
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97 | } |
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98 | |
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99 | return result; |
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100 | } |
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101 | |
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102 | const char *ARB_getenv_ignore_empty(const char *envvar) { |
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103 | const char *result = getenv(envvar); |
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104 | return (result && result[0]) ? result : NULp; |
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105 | } |
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106 | |
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107 | char *ARB_executable(const char *exe_name, const char *path) { |
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108 | char *buffer = ARB_alloc<char>(strlen(path)+1+strlen(exe_name)+1); |
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109 | const char *start = path; |
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110 | int found = 0; |
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111 | |
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112 | while (!found && start) { |
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113 | const char *colon = strchr(start, ':'); |
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114 | int len = colon ? (colon-start) : (int)strlen(start); |
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115 | |
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116 | memcpy(buffer, start, len); |
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117 | buffer[len] = '/'; |
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118 | strcpy(buffer+len+1, exe_name); |
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119 | |
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120 | found = GB_is_executablefile(buffer); |
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121 | start = colon ? colon+1 : NULp; |
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122 | } |
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123 | |
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124 | char *executable = found ? ARB_strdup(buffer) : NULp; |
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125 | free(buffer); |
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126 | return executable; |
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127 | } |
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128 | |
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129 | // -------------------------------------------------------------------------------- |
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130 | |
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131 | #ifdef UNIT_TESTS |
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132 | #ifndef TEST_UNIT_H |
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133 | #include <test_unit.h> |
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134 | #endif |
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135 | |
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136 | #if 0 |
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137 | // simple test |
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138 | #define TEST_EXPECT_FLOAT_2_ASCII(f,a) TEST_EXPECT_EQUAL(ARB_float_2_ascii(f), a) |
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139 | #else |
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140 | // also test back-conversion (ascii->float->ascii) is stable |
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141 | #define TEST_EXPECT_FLOAT_2_ASCII(f,a) do{ \ |
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142 | TEST_EXPECT_EQUAL(ARB_float_2_ascii(f), a); \ |
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143 | TEST_EXPECT_EQUAL(ARB_float_2_ascii(strtof(a, NULp)), a); \ |
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144 | }while(0) |
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145 | #endif |
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146 | |
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147 | __ATTR__REDUCED_OPTIMIZE void TEST_float_2_ascii() { |
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148 | TEST_EXPECT_FLOAT_2_ASCII(3.141592e+00, "3.141592"); |
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149 | TEST_EXPECT_FLOAT_2_ASCII(3.141592, "3.141592"); |
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150 | TEST_EXPECT_FLOAT_2_ASCII(3.14159, "3.14159"); |
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151 | |
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152 | TEST_EXPECT_FLOAT_2_ASCII(0.1, "0.1"); |
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153 | TEST_EXPECT_FLOAT_2_ASCII(0.01, "0.01"); |
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154 | TEST_EXPECT_FLOAT_2_ASCII(0.001, "0.001"); |
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155 | TEST_EXPECT_FLOAT_2_ASCII(0.0001, "0.0001"); |
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156 | TEST_EXPECT_FLOAT_2_ASCII(0.00001, "1e-05"); |
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157 | TEST_EXPECT_FLOAT_2_ASCII(0.000001, "1e-06"); |
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158 | TEST_EXPECT_FLOAT_2_ASCII(0.0000001, "1e-07"); |
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159 | TEST_EXPECT_FLOAT_2_ASCII(0.00000001, "1e-08"); |
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160 | TEST_EXPECT_FLOAT_2_ASCII(0.000000001, "1e-09"); |
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161 | TEST_EXPECT_FLOAT_2_ASCII(0.0000000001, "1e-10"); |
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162 | TEST_EXPECT_FLOAT_2_ASCII(0.00000000001, "1e-11"); |
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163 | |
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164 | TEST_EXPECT_FLOAT_2_ASCII(10, "10"); |
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165 | TEST_EXPECT_FLOAT_2_ASCII(100, "100"); |
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166 | TEST_EXPECT_FLOAT_2_ASCII(1000, "1000"); |
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167 | TEST_EXPECT_FLOAT_2_ASCII(10000, "10000"); |
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168 | TEST_EXPECT_FLOAT_2_ASCII(100000, "100000"); |
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169 | TEST_EXPECT_FLOAT_2_ASCII(1000000, "1e+06"); |
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170 | TEST_EXPECT_FLOAT_2_ASCII(10000000, "1e+07"); |
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171 | TEST_EXPECT_FLOAT_2_ASCII(100000000, "1e+08"); |
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172 | TEST_EXPECT_FLOAT_2_ASCII(1000000000, "1e+09"); |
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173 | |
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174 | TEST_EXPECT_FLOAT_2_ASCII(3141592, "3.141592e+06"); |
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175 | TEST_EXPECT_FLOAT_2_ASCII(314159.2, "3.141592e+05"); |
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176 | TEST_EXPECT_FLOAT_2_ASCII(31415.92, "3.141592e+04"); |
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177 | TEST_EXPECT_FLOAT_2_ASCII(3141.592, "3141.592041"); |
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178 | TEST_EXPECT_FLOAT_2_ASCII(3141.592041, "3141.592041"); |
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179 | TEST_EXPECT_FLOAT_2_ASCII(314.1592, "314.159210"); |
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180 | TEST_EXPECT_FLOAT_2_ASCII(314.159210, "314.159210"); |
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181 | TEST_EXPECT_FLOAT_2_ASCII(31.41592, "31.415920"); |
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182 | TEST_EXPECT_FLOAT_2_ASCII(3.141592, "3.141592"); |
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183 | TEST_EXPECT_FLOAT_2_ASCII(.3141592, "3.141592e-01"); |
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184 | TEST_EXPECT_FLOAT_2_ASCII(.03141592, "3.141592e-02"); |
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185 | TEST_EXPECT_FLOAT_2_ASCII(.003141592, "3.141592e-03"); |
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186 | TEST_EXPECT_FLOAT_2_ASCII(.0003141592, "3.141592e-04"); |
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187 | TEST_EXPECT_FLOAT_2_ASCII(.00003141592, "3.141592e-05"); |
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188 | TEST_EXPECT_FLOAT_2_ASCII(M_PI, "3.141593"); |
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189 | |
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190 | TEST_EXPECT_FLOAT_2_ASCII(1/2.0, "0.5"); |
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191 | TEST_EXPECT_FLOAT_2_ASCII(1/3.0, "3.333333e-01"); |
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192 | TEST_EXPECT_FLOAT_2_ASCII(1/4.0, "0.25"); |
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193 | TEST_EXPECT_FLOAT_2_ASCII(1/5.0, "0.2"); |
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194 | TEST_EXPECT_FLOAT_2_ASCII(1/6.0, "1.666667e-01"); |
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195 | |
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196 | TEST_EXPECT_FLOAT_2_ASCII(37550000.0, "3.755e+07"); |
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197 | TEST_EXPECT_FLOAT_2_ASCII(3755000.0, "3.755e+06"); |
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198 | TEST_EXPECT_FLOAT_2_ASCII(375500.0, "375500"); |
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199 | TEST_EXPECT_FLOAT_2_ASCII(37550.0, "37550"); |
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200 | TEST_EXPECT_FLOAT_2_ASCII(3755.0, "3755"); |
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201 | TEST_EXPECT_FLOAT_2_ASCII(375.5, "375.5"); |
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202 | TEST_EXPECT_FLOAT_2_ASCII(37.55, "37.55"); |
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203 | TEST_EXPECT_FLOAT_2_ASCII(3.755, "3.755"); |
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204 | TEST_EXPECT_FLOAT_2_ASCII(0.3755, "0.3755"); |
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205 | TEST_EXPECT_FLOAT_2_ASCII(0.03755, "0.03755"); |
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206 | TEST_EXPECT_FLOAT_2_ASCII(0.003755, "0.003755"); |
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207 | TEST_EXPECT_FLOAT_2_ASCII(0.0003755, "0.0003755"); |
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208 | TEST_EXPECT_FLOAT_2_ASCII(0.00003755, "3.755e-05"); |
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209 | TEST_EXPECT_FLOAT_2_ASCII(0.000003755, "3.755e-06"); |
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210 | |
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211 | TEST_EXPECT_FLOAT_2_ASCII(1000.0*1000.0*1000.0, "1e+09"); |
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212 | TEST_EXPECT_FLOAT_2_ASCII(25000.0*25000.0*25000.0, "1.5625e+13"); |
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213 | } |
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214 | |
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215 | // ------------------------------------------------------------ |
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216 | // test to ensure sanitizers work as expected |
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217 | |
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218 | #if 0 |
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219 | void TEST_fail_address_sanitizer() { |
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220 | static int array[5]; |
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221 | array[2] = 1; |
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222 | array[5] = 1; // <- fails with AddressSanitizer |
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223 | |
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224 | printf("array[5]=%i\n", array[5]); |
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225 | } |
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226 | #endif |
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227 | |
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228 | #if 0 |
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229 | void TEST_fail_undef_sanitizer() { |
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230 | // error below are not reported if AddressSanitizer bails out (TEST_fail_address_sanitizer) |
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231 | int x = 7; |
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232 | int y1 = -1; |
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233 | |
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234 | int s = x<<y1; // runtime error with ubsan: shift exponent -1 is negative (does not terminate) |
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235 | printf("s=%i\n", s); |
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236 | |
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237 | int o = INT_MAX; |
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238 | int u = INT_MIN; |
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239 | o++; // runtime error: signed integer overflow |
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240 | u--; // runtime error: signed integer overflow |
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241 | printf("o=%i u=%i\n", o, u); |
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242 | |
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243 | #if 0 |
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244 | int y2 = 0; |
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245 | int z1 = x/y1; |
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246 | int z2 = x/y2; // runtime error with ubsan: division by zero (terminates with SEGV; also w/o sanitizers) |
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247 | printf("z1=%i z2=%i\n", z1, z2); |
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248 | #endif |
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249 | } |
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250 | #endif |
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251 | |
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252 | #if 0 |
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253 | void TEST_fail_leak_sanitizer() { |
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254 | int *p = new int[5]; // <- fails with LeakSanitizer (only reported if AddressSanitizer does not bail out (TEST_fail_address_sanitizer)) |
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255 | printf("p[3]=%i\n", p[3]); |
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256 | } |
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257 | #endif |
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258 | |
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259 | // ------------------------------------------------------------ |
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260 | |
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261 | #endif // UNIT_TESTS |
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262 | |
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263 | // -------------------------------------------------------------------------------- |
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264 | |
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