1 | #include <string.h> |
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2 | #include "owl.h" |
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3 | |
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4 | owl_filter *owl_filter_new_fromstring(const char *name, const char *string) |
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5 | { |
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6 | owl_filter *f; |
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7 | char **argv; |
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8 | int argc; |
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9 | |
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10 | argv = owl_parseline(string, &argc); |
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11 | f = owl_filter_new(name, argc, strs(argv)); |
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12 | owl_parse_delete(argv, argc); |
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13 | |
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14 | return f; |
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15 | } |
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16 | |
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17 | owl_filter *owl_filter_new(const char *name, int argc, const char *const *argv) |
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18 | { |
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19 | owl_filter *f; |
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20 | |
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21 | f = owl_malloc(sizeof(owl_filter)); |
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22 | |
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23 | f->name=owl_strdup(name); |
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24 | f->fgcolor=OWL_COLOR_DEFAULT; |
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25 | f->bgcolor=OWL_COLOR_DEFAULT; |
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26 | |
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27 | /* first take arguments that have to come first */ |
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28 | /* set the color */ |
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29 | while ( argc>=2 && ( !strcmp(argv[0], "-c") || |
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30 | !strcmp(argv[0], "-b") ) ) { |
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31 | if (owl_util_string_to_color(argv[1])==OWL_COLOR_INVALID) { |
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32 | owl_function_error("The color '%s' is not available, using default.", argv[1]); |
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33 | } else { |
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34 | switch (argv[0][1]) { |
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35 | case 'c': |
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36 | f->fgcolor=owl_util_string_to_color(argv[1]); |
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37 | break; |
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38 | case 'b': |
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39 | f->bgcolor=owl_util_string_to_color(argv[1]); |
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40 | break; |
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41 | } |
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42 | } |
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43 | argc-=2; |
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44 | argv+=2; |
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45 | } |
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46 | |
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47 | if (!(f->root = owl_filter_parse_expression(argc, argv, NULL))) { |
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48 | owl_filter_delete(f); |
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49 | return NULL; |
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50 | } |
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51 | |
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52 | /* Now check for recursion. */ |
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53 | if (owl_filter_is_toodeep(f)) { |
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54 | owl_function_error("Filter loop!"); |
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55 | owl_filter_delete(f); |
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56 | return NULL; |
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57 | } |
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58 | |
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59 | return f; |
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60 | } |
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61 | |
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62 | |
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63 | /* A primitive expression is one without any toplevel ``and'' or ``or''s*/ |
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64 | |
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65 | static owl_filterelement * owl_filter_parse_primitive_expression(int argc, const char *const *argv, int *next) |
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66 | { |
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67 | owl_filterelement *fe, *op; |
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68 | int i = 0, skip; |
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69 | |
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70 | if(!argc) return NULL; |
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71 | |
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72 | fe = owl_malloc(sizeof(owl_filterelement)); |
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73 | owl_filterelement_create(fe); |
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74 | |
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75 | if(!strcasecmp(argv[i], "(")) { |
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76 | i++; |
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77 | op = owl_filter_parse_expression(argc-i, argv+i, &skip); |
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78 | if(!op) goto err; |
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79 | i += skip; |
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80 | if(i >= argc) goto err; |
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81 | if(strcasecmp(argv[i++], ")")) goto err; |
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82 | owl_filterelement_create_group(fe, op); |
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83 | } else if(!strcasecmp(argv[i], "not")) { |
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84 | i++; |
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85 | op = owl_filter_parse_primitive_expression(argc-i, argv+i, &skip); |
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86 | if(!op) goto err; |
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87 | i += skip; |
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88 | owl_filterelement_create_not(fe, op); |
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89 | } else if(!strcasecmp(argv[i], "true")) { |
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90 | i++; |
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91 | owl_filterelement_create_true(fe); |
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92 | } else if(!strcasecmp(argv[i], "false")) { |
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93 | i++; |
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94 | owl_filterelement_create_false(fe); |
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95 | } else { |
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96 | if(argc == 1) goto err; |
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97 | if(!strcasecmp(*argv, "filter")) { |
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98 | owl_filterelement_create_filter(fe, *(argv+1)); |
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99 | } else if(!strcasecmp(*argv, "perl")) { |
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100 | owl_filterelement_create_perl(fe, *(argv+1)); |
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101 | } else { |
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102 | if(owl_filterelement_create_re(fe, *argv, *(argv+1))) { |
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103 | goto err; |
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104 | } |
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105 | } |
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106 | i += 2; |
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107 | } |
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108 | |
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109 | if(next) { |
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110 | *next = i; |
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111 | } else if(i != argc) { |
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112 | goto err; |
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113 | } |
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114 | return fe; |
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115 | err: |
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116 | owl_filterelement_cleanup(fe); |
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117 | owl_free(fe); |
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118 | return NULL; |
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119 | } |
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120 | |
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121 | owl_filterelement * owl_filter_parse_expression(int argc, const char *const *argv, int *next) |
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122 | { |
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123 | int i = 0, skip; |
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124 | owl_filterelement * op1 = NULL, * op2 = NULL, *tmp; |
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125 | |
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126 | op1 = owl_filter_parse_primitive_expression(argc-i, argv+i, &skip); |
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127 | i += skip; |
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128 | if(!op1) goto err; |
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129 | |
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130 | while(i < argc) { |
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131 | if(strcasecmp(argv[i], "and") && |
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132 | strcasecmp(argv[i], "or")) break; |
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133 | op2 = owl_filter_parse_primitive_expression(argc-i-1, argv+i+1, &skip); |
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134 | if(!op2) goto err; |
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135 | tmp = owl_malloc(sizeof(owl_filterelement)); |
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136 | if(!strcasecmp(argv[i], "and")) { |
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137 | owl_filterelement_create_and(tmp, op1, op2); |
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138 | } else { |
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139 | owl_filterelement_create_or(tmp, op1, op2); |
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140 | } |
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141 | op1 = tmp; |
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142 | op2 = NULL; |
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143 | i += skip+1; |
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144 | } |
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145 | |
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146 | if(next) { |
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147 | *next = i; |
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148 | } else if(i != argc) { |
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149 | goto err; |
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150 | } |
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151 | return op1; |
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152 | err: |
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153 | if(op1) { |
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154 | owl_filterelement_cleanup(op1); |
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155 | owl_free(op1); |
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156 | } |
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157 | return NULL; |
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158 | } |
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159 | |
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160 | const char *owl_filter_get_name(const owl_filter *f) |
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161 | { |
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162 | return(f->name); |
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163 | } |
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164 | |
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165 | SV *owl_filter_to_sv(const owl_filter *f) |
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166 | { |
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167 | return owl_new_sv(owl_filter_get_name(f)); |
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168 | } |
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169 | |
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170 | void owl_filter_set_fgcolor(owl_filter *f, int color) |
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171 | { |
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172 | f->fgcolor=color; |
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173 | } |
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174 | |
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175 | int owl_filter_get_fgcolor(const owl_filter *f) |
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176 | { |
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177 | return(f->fgcolor); |
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178 | } |
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179 | |
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180 | void owl_filter_set_bgcolor(owl_filter *f, int color) |
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181 | { |
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182 | f->bgcolor=color; |
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183 | } |
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184 | |
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185 | int owl_filter_get_bgcolor(const owl_filter *f) |
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186 | { |
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187 | return(f->bgcolor); |
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188 | } |
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189 | |
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190 | /* return 1 if the message matches the given filter, otherwise |
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191 | * return 0. |
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192 | */ |
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193 | int owl_filter_message_match(const owl_filter *f, const owl_message *m) |
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194 | { |
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195 | int ret; |
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196 | if(!f->root) return 0; |
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197 | ret = owl_filterelement_match(f->root, m); |
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198 | return ret; |
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199 | } |
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200 | |
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201 | |
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202 | char* owl_filter_print(const owl_filter *f) |
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203 | { |
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204 | GString *out = g_string_new(""); |
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205 | |
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206 | if (f->fgcolor!=OWL_COLOR_DEFAULT) { |
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207 | g_string_append(out, "-c "); |
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208 | if (f->fgcolor < 8) { |
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209 | g_string_append(out, owl_util_color_to_string(f->fgcolor)); |
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210 | } |
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211 | else { |
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212 | g_string_append_printf(out, "%i",f->fgcolor); |
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213 | } |
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214 | g_string_append(out, " "); |
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215 | } |
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216 | if (f->bgcolor!=OWL_COLOR_DEFAULT) { |
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217 | g_string_append(out, "-b "); |
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218 | if (f->bgcolor < 8) { |
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219 | g_string_append(out, owl_util_color_to_string(f->bgcolor)); |
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220 | } |
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221 | else { |
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222 | g_string_append_printf(out, "%i",f->fgcolor); |
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223 | } |
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224 | g_string_append(out, " "); |
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225 | } |
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226 | if(f->root) { |
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227 | owl_filterelement_print(f->root, out); |
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228 | g_string_append(out, "\n"); |
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229 | } |
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230 | |
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231 | return g_string_free(out, 0); |
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232 | } |
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233 | |
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234 | /* Return 1 if the filters 'a' and 'b' are equivalent, 0 otherwise */ |
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235 | int owl_filter_equiv(const owl_filter *a, const owl_filter *b) |
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236 | { |
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237 | char *buffa, *buffb; |
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238 | int ret; |
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239 | |
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240 | buffa = owl_filter_print(a); |
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241 | buffb = owl_filter_print(b); |
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242 | |
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243 | ret = !strcmp(buffa, buffb); |
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244 | ret = ret && !strcmp(owl_filter_get_name(a), |
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245 | owl_filter_get_name(b)); |
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246 | |
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247 | owl_free(buffa); |
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248 | owl_free(buffb); |
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249 | |
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250 | return ret; |
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251 | } |
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252 | |
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253 | |
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254 | int owl_filter_is_toodeep(const owl_filter *f) |
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255 | { |
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256 | return owl_filterelement_is_toodeep(f, f->root); |
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257 | } |
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258 | |
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259 | void owl_filter_delete(owl_filter *f) |
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260 | { |
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261 | if (f == NULL) |
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262 | return; |
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263 | if (f->root) { |
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264 | owl_filterelement_cleanup(f->root); |
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265 | owl_free(f->root); |
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266 | } |
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267 | if (f->name) |
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268 | owl_free(f->name); |
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269 | owl_free(f); |
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270 | } |
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