| 1 | /* Syntactic analyzer */ |
| 2 | |
| 3 | #include <stdbool.h> |
| 4 | #include <stdarg.h> |
| 5 | #include <stdlib.h> |
| 6 | |
| 7 | #include "global_vars.h" |
| 8 | #include "lexical_analyzer.h" |
| 9 | #include "print_helper.h" |
| 10 | |
| 11 | #define PRINT_TOKEN 0 |
| 12 | |
| 13 | /* Syntactic analyzer functions implementation */ |
| 14 | |
| 15 | enum TokenType tokenType; |
| 16 | |
| 17 | static void analyze_TEXT() { |
| 18 | #if DEBUG |
| 19 | fprintf(stdout, "entering %s\n", __func__); |
| 20 | #endif |
| 21 | if (tokenType == MOT) { |
| 22 | scanner(); |
| 23 | #if PRINT_TOKEN |
| 24 | wprint_token(); |
| 25 | #endif |
| 26 | token[tokenFound].type = tokenTypestr[tokenType]; |
| 27 | tokenFound++; |
| 28 | analyze_TEXT(); |
| 29 | } else if (tokenType != MOTCLE && tokenType != NPARA && tokenType != SECTION && \ |
| 30 | tokenType != SSECTION && tokenType != FIN) { |
| 31 | fprintf(stderr, "%s follows error on %s\n", __func__, tokenTypestr[tokenType]); |
| 32 | fflush(stderr); |
| 33 | exit(EXIT_FAILURE); |
| 34 | } |
| 35 | #if DEBUG |
| 36 | fprintf(stdout, "leaving %s\n", __func__); |
| 37 | #endif |
| 38 | } |
| 39 | |
| 40 | static void analyze_P() { |
| 41 | #if DEBUG |
| 42 | fprintf(stdout, "entering %s\n", __func__); |
| 43 | #endif |
| 44 | if (tokenType == NPARA) { |
| 45 | scanner(); |
| 46 | #if PRINT_TOKEN |
| 47 | wprint_token(); |
| 48 | #endif |
| 49 | token[tokenFound].type = tokenTypestr[tokenType]; |
| 50 | tokenFound++; |
| 51 | if (tokenType == MOT) { |
| 52 | scanner(); |
| 53 | #if PRINT_TOKEN |
| 54 | wprint_token(); |
| 55 | #endif |
| 56 | token[tokenFound].type = tokenTypestr[tokenType]; |
| 57 | tokenFound++; |
| 58 | analyze_TEXT(); |
| 59 | analyze_P(); |
| 60 | } else if (tokenType != SECTION && tokenType != SSECTION && tokenType != FIN) { |
| 61 | fprintf(stderr, "%s follows error on %s\n", __func__, tokenTypestr[tokenType]); |
| 62 | fflush(stderr); |
| 63 | exit(EXIT_FAILURE); |
| 64 | } |
| 65 | } else if (tokenType != SECTION && tokenType != SSECTION && tokenType != FIN) { |
| 66 | fprintf(stderr, "%s follows error on %s\n", __func__, tokenTypestr[tokenType]); |
| 67 | fflush(stderr); |
| 68 | exit(EXIT_FAILURE); |
| 69 | } |
| 70 | #if DEBUG |
| 71 | fprintf(stdout, "leaving %s\n", __func__); |
| 72 | #endif |
| 73 | } |
| 74 | |
| 75 | static void analyze_HEAD() { |
| 76 | #if DEBUG |
| 77 | fprintf(stdout, "entering %s\n", __func__); |
| 78 | #endif |
| 79 | if (tokenType == MOTCLE) { |
| 80 | scanner(); |
| 81 | #if PRINT_TOKEN |
| 82 | wprint_token(); |
| 83 | #endif |
| 84 | token[tokenFound].type = tokenTypestr[tokenType]; |
| 85 | tokenFound++; |
| 86 | analyze_TEXT(); |
| 87 | if (tokenType == MOTCLE) { |
| 88 | scanner(); |
| 89 | #if PRINT_TOKEN |
| 90 | wprint_token(); |
| 91 | #endif /* PRINT_TOKEN */ |
| 92 | token[tokenFound].type = tokenTypestr[tokenType]; |
| 93 | tokenFound++; |
| 94 | analyze_TEXT(); |
| 95 | } else if (tokenType != NPARA && tokenType != SECTION && tokenType != FIN) { |
| 96 | fprintf(stderr, "%s follows error on %s\n", __func__, tokenTypestr[tokenType]); |
| 97 | fflush(stderr); |
| 98 | exit(EXIT_FAILURE); |
| 99 | } |
| 100 | } else if (tokenType != NPARA && tokenType != SECTION && tokenType != FIN) { |
| 101 | fprintf(stderr, "%s follows error on %s\n", __func__, tokenTypestr[tokenType]); |
| 102 | fflush(stderr); |
| 103 | exit(EXIT_FAILURE); |
| 104 | } |
| 105 | #if DEBUG |
| 106 | fprintf(stdout, "leaving %s\n", __func__); |
| 107 | #endif |
| 108 | } |
| 109 | |
| 110 | static void analyze_H1() { |
| 111 | #if DEBUG |
| 112 | fprintf(stdout, "entering %s\n", __func__); |
| 113 | #endif |
| 114 | if (tokenType == SECTION) { |
| 115 | scanner(); |
| 116 | #if PRINT_TOKEN |
| 117 | wprint_token(); |
| 118 | #endif /* PRINT_TOKEN */ |
| 119 | token[tokenFound].type = tokenTypestr[tokenType]; |
| 120 | tokenFound++; |
| 121 | analyze_TEXT(); |
| 122 | } |
| 123 | #if DEBUG |
| 124 | fprintf(stdout, "leaving %s\n", __func__); |
| 125 | #endif |
| 126 | } |
| 127 | |
| 128 | static void analyze_H2() { |
| 129 | #if DEBUG |
| 130 | fprintf(stdout, "entering %s\n", __func__); |
| 131 | #endif |
| 132 | if (tokenType == SSECTION) { |
| 133 | scanner(); |
| 134 | #if PRINT_TOKEN |
| 135 | wprint_token(); |
| 136 | #endif /* PRINT_TOKEN */ |
| 137 | token[tokenFound].type = tokenTypestr[tokenType]; |
| 138 | tokenFound++; |
| 139 | analyze_TEXT(); |
| 140 | } |
| 141 | #if DEBUG |
| 142 | fprintf(stdout, "leaving %s\n", __func__); |
| 143 | #endif |
| 144 | } |
| 145 | |
| 146 | static void analyze_S2() { |
| 147 | #if DEBUG |
| 148 | fprintf(stdout, "entering %s\n", __func__); |
| 149 | #endif |
| 150 | if (tokenType == SSECTION) { |
| 151 | analyze_H2(); |
| 152 | analyze_P(); |
| 153 | analyze_S2(); |
| 154 | } else if (tokenType != SECTION && tokenType != FIN) { |
| 155 | fprintf(stderr, "%s follows error on %s\n", __func__, tokenTypestr[tokenType]); |
| 156 | fflush(stderr); |
| 157 | exit(EXIT_FAILURE); |
| 158 | } |
| 159 | #if DEBUG |
| 160 | fprintf(stdout, "leaving %s\n", __func__); |
| 161 | #endif |
| 162 | } |
| 163 | |
| 164 | static void analyze_S1() { |
| 165 | #if DEBUG |
| 166 | fprintf(stdout, "entering %s\n", __func__); |
| 167 | #endif |
| 168 | if (tokenType == SECTION) { |
| 169 | analyze_H1(); |
| 170 | analyze_P(); |
| 171 | analyze_S2(); |
| 172 | analyze_S1(); |
| 173 | } else if (tokenType != FIN) { |
| 174 | fprintf(stderr, "%s follows error on %s\n", __func__, tokenTypestr[tokenType]); |
| 175 | fflush(stderr); |
| 176 | exit(EXIT_FAILURE); |
| 177 | } |
| 178 | #if DEBUG |
| 179 | fprintf(stdout, "leaving %s\n", __func__); |
| 180 | #endif |
| 181 | } |
| 182 | |
| 183 | static void analyze_BODY() { |
| 184 | #if DEBUG |
| 185 | fprintf(stdout, "entering %s\n", __func__); |
| 186 | #endif |
| 187 | analyze_P(); |
| 188 | analyze_S1(); |
| 189 | #if DEBUG |
| 190 | fprintf(stdout, "leaving %s\n", __func__); |
| 191 | #endif |
| 192 | } |
| 193 | |
| 194 | void analyze_AXIOME() { |
| 195 | #if DEBUG |
| 196 | fprintf(stdout, "entering %s\n", __func__); |
| 197 | #endif |
| 198 | scanner(); |
| 199 | /* print the lexical analysis result */ |
| 200 | #if PRINT_TOKEN |
| 201 | wprint_token(); |
| 202 | #endif /* PRINT_TOKEN */ |
| 203 | token[tokenFound].type = tokenTypestr[tokenType]; |
| 204 | tokenFound++; |
| 205 | analyze_HEAD(); |
| 206 | analyze_BODY(); |
| 207 | if (tokenType != FIN) { |
| 208 | fprintf(stderr, "%s follows error on %s\n", __func__, tokenTypestr[tokenType]); |
| 209 | fflush(stderr); |
| 210 | exit(EXIT_FAILURE); |
| 211 | } |
| 212 | fprintf(stdout, "successful syntactic analysis\n"); |
| 213 | #if DEBUG |
| 214 | fprintf(stdout, "leaving %s\n", __func__); |
| 215 | #endif |
| 216 | fflush(stdout); |
| 217 | } |