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1 | office | 1 | /** |
2 | * @file implode.c |
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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 | * Synopsis: |
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32 | * implode(string glue, list(string) pieces) |
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33 | * |
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34 | * Variables: |
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35 | * string (empty) - concatenation of strings in 'pieces', with 'glue' in between |
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36 | * every two elements. |
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37 | */ |
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38 | |||
39 | #include <stdlib.h> |
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40 | #include <string.h> |
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41 | |||
42 | #include <misc/expstring.h> |
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43 | |||
44 | #include <ncd/module_common.h> |
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45 | |||
46 | #include <generated/blog_channel_ncd_implode.h> |
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47 | |||
48 | struct instance { |
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49 | NCDModuleInst *i; |
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50 | MemRef result; |
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51 | }; |
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52 | |||
53 | static void func_new (void *vo, NCDModuleInst *i, const struct NCDModuleInst_new_params *params) |
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54 | { |
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55 | struct instance *o = vo; |
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56 | o->i = i; |
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57 | |||
58 | // read arguments |
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59 | NCDValRef glue_arg; |
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60 | NCDValRef pieces_arg; |
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61 | if (!NCDVal_ListRead(params->args, 2, &glue_arg, &pieces_arg)) { |
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62 | ModuleLog(i, BLOG_ERROR, "wrong arity"); |
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63 | goto fail0; |
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64 | } |
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65 | if (!NCDVal_IsString(glue_arg) || !NCDVal_IsList(pieces_arg)) { |
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66 | ModuleLog(i, BLOG_ERROR, "wrong type"); |
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67 | goto fail0; |
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68 | } |
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69 | |||
70 | // init result string |
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71 | ExpString str; |
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72 | if (!ExpString_Init(&str)) { |
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73 | ModuleLog(i, BLOG_ERROR, "ExpString_Init failed"); |
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74 | goto fail0; |
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75 | } |
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76 | |||
77 | size_t count = NCDVal_ListCount(pieces_arg); |
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78 | for (size_t j = 0; j < count; j++) { |
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79 | NCDValRef piece = NCDVal_ListGet(pieces_arg, j); |
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80 | |||
81 | // check piece type |
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82 | if (!NCDVal_IsString(piece)) { |
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83 | ModuleLog(i, BLOG_ERROR, "wrong piece type"); |
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84 | goto fail1; |
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85 | } |
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86 | |||
87 | // append glue |
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88 | if (j > 0) { |
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89 | if (!ExpString_AppendBinaryMr(&str, NCDVal_StringMemRef(glue_arg))) { |
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90 | ModuleLog(i, BLOG_ERROR, "ExpString_AppendBinaryMr failed"); |
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91 | goto fail1; |
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92 | } |
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93 | } |
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94 | |||
95 | // append piece |
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96 | if (!ExpString_AppendBinaryMr(&str, NCDVal_StringMemRef(piece))) { |
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97 | ModuleLog(i, BLOG_ERROR, "ExpString_AppendBinaryMr failed"); |
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98 | goto fail1; |
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99 | } |
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100 | } |
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101 | |||
102 | // store result |
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103 | o->result = ExpString_GetMr(&str); |
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104 | |||
105 | // signal up |
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106 | NCDModuleInst_Backend_Up(i); |
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107 | return; |
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108 | |||
109 | fail1: |
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110 | ExpString_Free(&str); |
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111 | fail0: |
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112 | NCDModuleInst_Backend_DeadError(i); |
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113 | } |
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114 | |||
115 | static void func_die (void *vo) |
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116 | { |
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117 | struct instance *o = vo; |
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118 | |||
119 | // free result |
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120 | free((char *)o->result.ptr); |
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121 | |||
122 | NCDModuleInst_Backend_Dead(o->i); |
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123 | } |
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124 | |||
125 | static int func_getvar2 (void *vo, NCD_string_id_t name, NCDValMem *mem, NCDValRef *out) |
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126 | { |
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127 | struct instance *o = vo; |
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128 | |||
129 | if (name == NCD_STRING_EMPTY) { |
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130 | *out = NCDVal_NewStringBinMr(mem, o->result); |
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131 | return 1; |
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132 | } |
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133 | |||
134 | return 0; |
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135 | } |
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136 | |||
137 | static struct NCDModule modules[] = { |
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138 | { |
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139 | .type = "implode", |
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140 | .func_new2 = func_new, |
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141 | .func_die = func_die, |
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142 | .func_getvar2 = func_getvar2, |
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143 | .alloc_size = sizeof(struct instance) |
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144 | }, { |
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145 | .type = NULL |
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146 | } |
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147 | }; |
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148 | |||
149 | const struct NCDModuleGroup ncdmodule_implode = { |
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150 | .modules = modules |
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151 | }; |