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1 | office | 1 | /** |
2 | * @file assert.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 | * assert(string cond) |
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33 | * assert_false(string cond) |
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34 | * |
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35 | * Description: |
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36 | * If 'cond' is equal to the string "true" (assert) or "false" (assert_false), |
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37 | * does nothing. Otherwise, logs an error and initiates interpreter termination |
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38 | * with exit code 1, i.e. it is equivalent to calling exit("1"). |
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39 | * Note that "assert_false(cond);" is not completely equivalent to |
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40 | * "not(cond) a; assert(a);", in case 'cond' is something other than "true" |
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41 | * or "false". |
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42 | */ |
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43 | |||
44 | #include <ncd/module_common.h> |
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45 | |||
46 | #include <generated/blog_channel_ncd_assert.h> |
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47 | |||
48 | static void func_new_common (NCDModuleInst *i, const struct NCDModuleInst_new_params *params, int is_false) |
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49 | { |
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50 | // check arguments |
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51 | NCDValRef cond_arg; |
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52 | if (!NCDVal_ListRead(params->args, 1, &cond_arg)) { |
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53 | ModuleLog(i, BLOG_ERROR, "wrong arity"); |
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54 | goto fail0; |
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55 | } |
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56 | if (!NCDVal_IsString(cond_arg)) { |
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57 | ModuleLog(i, BLOG_ERROR, "wrong type"); |
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58 | goto fail0; |
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59 | } |
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60 | |||
61 | // signal up |
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62 | NCDModuleInst_Backend_Up(i); |
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63 | |||
64 | // if failed, initiate exit (before up!) |
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65 | if ((!is_false && !NCDVal_StringEqualsId(cond_arg, NCD_STRING_TRUE)) || |
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66 | (is_false && !NCDVal_StringEqualsId(cond_arg, NCD_STRING_FALSE)) |
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67 | ) { |
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68 | ModuleLog(i, BLOG_ERROR, "assertion failed"); |
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69 | NCDModuleInst_Backend_InterpExit(i, 1); |
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70 | } |
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71 | |||
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 void func_new (void *unused, NCDModuleInst *i, const struct NCDModuleInst_new_params *params) |
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79 | { |
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80 | func_new_common(i, params, 0); |
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81 | } |
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82 | |||
83 | static void func_new_false (void *unused, NCDModuleInst *i, const struct NCDModuleInst_new_params *params) |
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84 | { |
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85 | func_new_common(i, params, 1); |
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86 | } |
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87 | |||
88 | static struct NCDModule modules[] = { |
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89 | { |
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90 | .type = "assert", |
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91 | .func_new2 = func_new |
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92 | }, { |
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93 | .type = "assert_false", |
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94 | .func_new2 = func_new_false |
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95 | }, { |
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96 | .type = NULL |
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97 | } |
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98 | }; |
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99 | |||
100 | const struct NCDModuleGroup ncdmodule_assert = { |
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101 | .modules = modules |
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102 | }; |