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1 | office | 1 | /** |
2 | * @file strcmp.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 | * String comparison module. |
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32 | * |
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33 | * Synopsis: strcmp(string str1, string str2) |
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34 | * Variables: |
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35 | * string (empty) - "true" if str1 and str2 are equal, "false" if not |
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36 | */ |
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37 | |||
38 | #include <stdlib.h> |
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39 | #include <string.h> |
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40 | |||
41 | #include <ncd/module_common.h> |
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42 | |||
43 | #include <generated/blog_channel_ncd_strcmp.h> |
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44 | |||
45 | struct instance { |
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46 | NCDModuleInst *i; |
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47 | int result; |
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48 | }; |
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49 | |||
50 | static void func_new (void *vo, NCDModuleInst *i, const struct NCDModuleInst_new_params *params) |
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51 | { |
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52 | struct instance *o = vo; |
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53 | o->i = i; |
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54 | |||
55 | // check arguments |
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56 | NCDValRef str1_arg; |
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57 | NCDValRef str2_arg; |
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58 | if (!NCDVal_ListRead(params->args, 2, &str1_arg, &str2_arg)) { |
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59 | ModuleLog(i, BLOG_ERROR, "wrong arity"); |
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60 | goto fail0; |
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61 | } |
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62 | if (!NCDVal_IsString(str1_arg) || !NCDVal_IsString(str2_arg)) { |
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63 | ModuleLog(i, BLOG_ERROR, "wrong type"); |
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64 | goto fail0; |
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65 | } |
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66 | |||
67 | // compare |
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68 | o->result = (NCDVal_Compare(str1_arg, str2_arg) == 0); |
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69 | |||
70 | // signal up |
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71 | NCDModuleInst_Backend_Up(i); |
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72 | return; |
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73 | |||
74 | fail0: |
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75 | NCDModuleInst_Backend_DeadError(i); |
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76 | } |
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77 | |||
78 | static int func_getvar2 (void *vo, NCD_string_id_t name, NCDValMem *mem, NCDValRef *out) |
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79 | { |
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80 | struct instance *o = vo; |
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81 | |||
82 | if (name == NCD_STRING_EMPTY) { |
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83 | *out = ncd_make_boolean(mem, o->result); |
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84 | return 1; |
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85 | } |
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86 | |||
87 | return 0; |
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88 | } |
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89 | |||
90 | static struct NCDModule modules[] = { |
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91 | { |
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92 | .type = "strcmp", |
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93 | .func_new2 = func_new, |
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94 | .func_getvar2 = func_getvar2, |
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95 | .alloc_size = sizeof(struct instance) |
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96 | }, { |
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97 | .type = NULL |
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98 | } |
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99 | }; |
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100 | |||
101 | const struct NCDModuleGroup ncdmodule_strcmp = { |
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102 | .modules = modules |
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103 | }; |