BadVPN – Blame information for rev 1
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1 | office | 1 | /** |
2 | * @file cmdline.h |
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3 | * @author Ambroz Bizjak <ambrop7@gmail.com> |
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4 | * |
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5 | * @section LICENSE |
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6 | * |
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7 | * Redistribution and use in source and binary forms, with or without |
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8 | * modification, are permitted provided that the following conditions are met: |
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9 | * 1. Redistributions of source code must retain the above copyright |
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10 | * notice, this list of conditions and the following disclaimer. |
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11 | * 2. Redistributions in binary form must reproduce the above copyright |
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12 | * notice, this list of conditions and the following disclaimer in the |
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13 | * documentation and/or other materials provided with the distribution. |
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14 | * 3. Neither the name of the author nor the |
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15 | * names of its contributors may be used to endorse or promote products |
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16 | * derived from this software without specific prior written permission. |
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17 | * |
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18 | * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" AND |
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19 | * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED |
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20 | * WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE |
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21 | * DISCLAIMED. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY |
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22 | * DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES |
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23 | * (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; |
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24 | * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND |
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25 | * ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT |
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26 | * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS |
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27 | * SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. |
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28 | * |
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29 | * @section DESCRIPTION |
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30 | * |
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31 | * Command line construction functions. |
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32 | */ |
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33 | |||
34 | #ifndef BADVPN_MISC_CMDLINE_H |
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35 | #define BADVPN_MISC_CMDLINE_H |
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36 | |||
37 | #include <stddef.h> |
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38 | #include <stdarg.h> |
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39 | |||
40 | #include <misc/debug.h> |
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41 | #include <misc/exparray.h> |
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42 | #include <misc/strdup.h> |
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43 | #include <misc/memref.h> |
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44 | |||
45 | typedef struct { |
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46 | struct ExpArray arr; |
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47 | size_t n; |
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48 | } CmdLine; |
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49 | |||
50 | static int CmdLine_Init (CmdLine *c); |
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51 | static void CmdLine_Free (CmdLine *c); |
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52 | static int CmdLine_Append (CmdLine *c, const char *str); |
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53 | static int CmdLine_AppendNoNull (CmdLine *c, const char *str, size_t str_len); |
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54 | static int CmdLine_AppendNoNullMr (CmdLine *c, MemRef mr); |
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55 | static int CmdLine_AppendMulti (CmdLine *c, int num, ...); |
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56 | static int CmdLine_Finish (CmdLine *c); |
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57 | static char ** CmdLine_Get (CmdLine *c); |
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58 | |||
59 | static int _CmdLine_finished (CmdLine *c) |
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60 | { |
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61 | return (c->n > 0 && ((char **)c->arr.v)[c->n - 1] == NULL); |
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62 | } |
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63 | |||
64 | int CmdLine_Init (CmdLine *c) |
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65 | { |
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66 | if (!ExpArray_init(&c->arr, sizeof(char *), 16)) { |
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67 | return 0; |
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68 | } |
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69 | |||
70 | c->n = 0; |
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71 | |||
72 | return 1; |
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73 | } |
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74 | |||
75 | void CmdLine_Free (CmdLine *c) |
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76 | { |
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77 | for (size_t i = 0; i < c->n; i++) { |
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78 | free(((char **)c->arr.v)[i]); |
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79 | } |
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80 | |||
81 | free(c->arr.v); |
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82 | } |
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83 | |||
84 | int CmdLine_Append (CmdLine *c, const char *str) |
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85 | { |
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86 | ASSERT(str) |
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87 | ASSERT(!_CmdLine_finished(c)) |
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88 | |||
89 | if (!ExpArray_resize(&c->arr, c->n + 1)) { |
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90 | return 0; |
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91 | } |
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92 | |||
93 | if (!(((char **)c->arr.v)[c->n] = strdup(str))) { |
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94 | return 0; |
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95 | } |
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96 | |||
97 | c->n++; |
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98 | |||
99 | return 1; |
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100 | } |
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101 | |||
102 | int CmdLine_AppendNoNull (CmdLine *c, const char *str, size_t str_len) |
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103 | { |
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104 | ASSERT(str) |
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105 | ASSERT(!memchr(str, '\0', str_len)) |
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106 | ASSERT(!_CmdLine_finished(c)) |
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107 | |||
108 | if (!ExpArray_resize(&c->arr, c->n + 1)) { |
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109 | return 0; |
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110 | } |
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111 | |||
112 | if (!(((char **)c->arr.v)[c->n] = b_strdup_bin(str, str_len))) { |
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113 | return 0; |
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114 | } |
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115 | |||
116 | c->n++; |
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117 | |||
118 | return 1; |
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119 | } |
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120 | |||
121 | int CmdLine_AppendNoNullMr (CmdLine *c, MemRef mr) |
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122 | { |
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123 | return CmdLine_AppendNoNull(c, mr.ptr, mr.len); |
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124 | } |
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125 | |||
126 | int CmdLine_AppendMulti (CmdLine *c, int num, ...) |
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127 | { |
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128 | int res = 1; |
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129 | |||
130 | va_list vl; |
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131 | va_start(vl, num); |
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132 | |||
133 | for (int i = 0; i < num; i++) { |
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134 | const char *str = va_arg(vl, const char *); |
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135 | if (!CmdLine_Append(c, str)) { |
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136 | res = 0; |
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137 | break; |
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138 | } |
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139 | } |
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140 | |||
141 | va_end(vl); |
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142 | |||
143 | return res; |
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144 | } |
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145 | |||
146 | int CmdLine_Finish (CmdLine *c) |
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147 | { |
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148 | ASSERT(!_CmdLine_finished(c)) |
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149 | |||
150 | if (!ExpArray_resize(&c->arr, c->n + 1)) { |
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151 | return 0; |
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152 | } |
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153 | |||
154 | ((char **)c->arr.v)[c->n] = NULL; |
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155 | |||
156 | c->n++; |
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157 | |||
158 | return 1; |
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159 | } |
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160 | |||
161 | char ** CmdLine_Get (CmdLine *c) |
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162 | { |
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163 | ASSERT(_CmdLine_finished(c)) |
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164 | |||
165 | return (char **)c->arr.v; |
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166 | } |
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167 | |||
168 | #endif |