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1 | office | 1 | /** |
2 | * @file NCDConfigParser.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 | |||
30 | #include <stdio.h> |
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31 | #include <stdlib.h> |
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32 | #include <string.h> |
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33 | |||
34 | #include <misc/debug.h> |
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35 | #include <base/BLog.h> |
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36 | #include <ncd/NCDConfigTokenizer.h> |
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37 | |||
38 | #include "ncd/NCDConfigParser.h" |
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39 | |||
40 | #include <generated/blog_channel_NCDConfigParser.h> |
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41 | |||
42 | #include "../generated/NCDConfigParser_parse.c" |
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43 | #include "../generated/NCDConfigParser_parse.h" |
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44 | |||
45 | struct parser_state { |
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46 | struct parser_out out; |
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47 | int error; |
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48 | void *parser; |
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49 | }; |
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50 | |||
51 | static int tokenizer_output (void *user, int token, char *value, size_t value_len, size_t line, size_t line_char) |
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52 | { |
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53 | struct parser_state *state = user; |
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54 | ASSERT(!state->out.out_of_memory) |
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55 | ASSERT(!state->out.syntax_error) |
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56 | ASSERT(!state->error) |
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57 | |||
58 | if (token == NCD_ERROR) { |
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59 | BLog(BLOG_ERROR, "line %zu, character %zu: tokenizer error", line, line_char); |
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60 | state->error = 1; |
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61 | return 0; |
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62 | } |
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63 | |||
64 | struct token minor; |
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65 | minor.str = value; |
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66 | minor.len = value_len; |
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67 | |||
68 | switch (token) { |
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69 | case NCD_EOF: { |
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70 | Parse(state->parser, 0, minor, &state->out); |
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71 | } break; |
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72 | |||
73 | case NCD_TOKEN_CURLY_OPEN: { |
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74 | Parse(state->parser, CURLY_OPEN, minor, &state->out); |
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75 | } break; |
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76 | |||
77 | case NCD_TOKEN_CURLY_CLOSE: { |
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78 | Parse(state->parser, CURLY_CLOSE, minor, &state->out); |
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79 | } break; |
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80 | |||
81 | case NCD_TOKEN_ROUND_OPEN: { |
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82 | Parse(state->parser, ROUND_OPEN, minor, &state->out); |
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83 | } break; |
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84 | |||
85 | case NCD_TOKEN_ROUND_CLOSE: { |
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86 | Parse(state->parser, ROUND_CLOSE, minor, &state->out); |
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87 | } break; |
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88 | |||
89 | case NCD_TOKEN_SEMICOLON: { |
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90 | Parse(state->parser, SEMICOLON, minor, &state->out); |
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91 | } break; |
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92 | |||
93 | case NCD_TOKEN_DOT: { |
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94 | Parse(state->parser, DOT, minor, &state->out); |
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95 | } break; |
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96 | |||
97 | case NCD_TOKEN_COMMA: { |
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98 | Parse(state->parser, COMMA, minor, &state->out); |
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99 | } break; |
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100 | |||
101 | case NCD_TOKEN_ARROW: { |
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102 | Parse(state->parser, ARROW, minor, &state->out); |
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103 | } break; |
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104 | |||
105 | case NCD_TOKEN_PROCESS: { |
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106 | Parse(state->parser, PROCESS, minor, &state->out); |
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107 | } break; |
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108 | |||
109 | case NCD_TOKEN_TEMPLATE: { |
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110 | Parse(state->parser, TEMPLATE, minor, &state->out); |
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111 | } break; |
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112 | |||
113 | case NCD_TOKEN_NAME: { |
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114 | Parse(state->parser, NAME, minor, &state->out); |
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115 | } break; |
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116 | |||
117 | case NCD_TOKEN_STRING: { |
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118 | Parse(state->parser, STRING, minor, &state->out); |
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119 | } break; |
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120 | |||
121 | case NCD_TOKEN_COLON: { |
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122 | Parse(state->parser, COLON, minor, &state->out); |
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123 | } break; |
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124 | |||
125 | case NCD_TOKEN_BRACKET_OPEN: { |
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126 | Parse(state->parser, BRACKET_OPEN, minor, &state->out); |
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127 | } break; |
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128 | |||
129 | case NCD_TOKEN_BRACKET_CLOSE: { |
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130 | Parse(state->parser, BRACKET_CLOSE, minor, &state->out); |
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131 | } break; |
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132 | |||
133 | case NCD_TOKEN_IF: { |
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134 | Parse(state->parser, IF, minor, &state->out); |
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135 | } break; |
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136 | |||
137 | case NCD_TOKEN_ELIF: { |
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138 | Parse(state->parser, ELIF, minor, &state->out); |
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139 | } break; |
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140 | |||
141 | case NCD_TOKEN_ELSE: { |
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142 | Parse(state->parser, ELSE, minor, &state->out); |
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143 | } break; |
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144 | |||
145 | case NCD_TOKEN_FOREACH: { |
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146 | Parse(state->parser, FOREACH, minor, &state->out); |
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147 | } break; |
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148 | |||
149 | case NCD_TOKEN_AS: { |
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150 | Parse(state->parser, AS, minor, &state->out); |
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151 | } break; |
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152 | |||
153 | case NCD_TOKEN_INCLUDE: { |
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154 | Parse(state->parser, INCLUDE, minor, &state->out); |
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155 | } break; |
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156 | |||
157 | case NCD_TOKEN_INCLUDE_GUARD: { |
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158 | Parse(state->parser, INCLUDE_GUARD, minor, &state->out); |
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159 | } break; |
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160 | |||
161 | case NCD_TOKEN_AT: { |
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162 | Parse(state->parser, AT_SIGN, minor, &state->out); |
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163 | } break; |
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164 | |||
165 | case NCD_TOKEN_BLOCK: { |
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166 | Parse(state->parser, BLOCK, minor, &state->out); |
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167 | } break; |
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168 | |||
169 | case NCD_TOKEN_CARET: { |
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170 | Parse(state->parser, CARET, minor, &state->out); |
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171 | } break; |
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172 | |||
173 | case NCD_TOKEN_DO: { |
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174 | Parse(state->parser, TOKEN_DO, minor, &state->out); |
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175 | } break; |
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176 | |||
177 | case NCD_TOKEN_INTERRUPT: { |
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178 | Parse(state->parser, TOKEN_INTERRUPT, minor, &state->out); |
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179 | } break; |
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180 | |||
181 | default: |
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182 | BLog(BLOG_ERROR, "line %zu, character %zu: invalid token", line, line_char); |
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183 | free(minor.str); |
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184 | state->error = 1; |
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185 | return 0; |
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186 | } |
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187 | |||
188 | // if we got syntax error, stop parsing |
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189 | if (state->out.syntax_error) { |
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190 | BLog(BLOG_ERROR, "line %zu, character %zu: syntax error", line, line_char); |
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191 | state->error = 1; |
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192 | return 0; |
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193 | } |
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194 | |||
195 | if (state->out.out_of_memory) { |
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196 | BLog(BLOG_ERROR, "line %zu, character %zu: out of memory", line, line_char); |
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197 | state->error = 1; |
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198 | return 0; |
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199 | } |
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200 | |||
201 | return 1; |
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202 | } |
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203 | |||
204 | int NCDConfigParser_Parse (char *config, size_t config_len, NCDProgram *out_ast) |
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205 | { |
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206 | struct parser_state state; |
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207 | |||
208 | state.out.out_of_memory = 0; |
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209 | state.out.syntax_error = 0; |
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210 | state.out.have_ast = 0; |
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211 | state.error = 0; |
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212 | |||
213 | if (!(state.parser = ParseAlloc(malloc))) { |
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214 | BLog(BLOG_ERROR, "ParseAlloc failed"); |
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215 | return 0; |
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216 | } |
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217 | |||
218 | // tokenize and parse |
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219 | NCDConfigTokenizer_Tokenize(MemRef_Make(config, config_len), tokenizer_output, &state); |
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220 | |||
221 | ParseFree(state.parser, free); |
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222 | |||
223 | if (state.error) { |
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224 | if (state.out.have_ast) { |
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225 | NCDProgram_Free(&state.out.ast); |
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226 | } |
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227 | return 0; |
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228 | } |
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229 | |||
230 | ASSERT(state.out.have_ast) |
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231 | |||
232 | *out_ast = state.out.ast; |
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233 | return 1; |
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234 | } |