1 /* 2 * Copyright (C) 2009 The Android Open Source Project 3 * 4 * Licensed under the Apache License, Version 2.0 (the "License"); 5 * you may not use this file except in compliance with the License. 6 * You may obtain a copy of the License at 7 * 8 * http://www.apache.org/licenses/LICENSE-2.0 9 * 10 * Unless required by applicable law or agreed to in writing, software 11 * distributed under the License is distributed on an "AS IS" BASIS, 12 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. 13 * See the License for the specific language governing permissions and 14 * limitations under the License. 15 */ 16 17 #include <stdio.h> 18 #include <stdlib.h> 19 #include <string.h> 20 21 #include "expr.h" 22 #include "parser.h" 23 24 extern int yyparse(Expr** root, int* error_count); 25 26 int expect(const char* expr_str, const char* expected, int* errors) { 27 Expr* e; 28 int error; 29 char* result; 30 31 printf("."); 32 33 yy_scan_string(expr_str); 34 int error_count = 0; 35 error = yyparse(&e, &error_count); 36 if (error > 0 || error_count > 0) { 37 fprintf(stderr, "error parsing \"%s\" (%d errors)\n", 38 expr_str, error_count); 39 ++*errors; 40 return 0; 41 } 42 43 State state; 44 state.cookie = NULL; 45 state.script = strdup(expr_str); 46 state.errmsg = NULL; 47 48 result = Evaluate(&state, e); 49 free(state.errmsg); 50 free(state.script); 51 if (result == NULL && expected != NULL) { 52 fprintf(stderr, "error evaluating \"%s\"\n", expr_str); 53 ++*errors; 54 return 0; 55 } 56 57 if (result == NULL && expected == NULL) { 58 return 1; 59 } 60 61 if (strcmp(result, expected) != 0) { 62 fprintf(stderr, "evaluating \"%s\": expected \"%s\", got \"%s\"\n", 63 expr_str, expected, result); 64 ++*errors; 65 free(result); 66 return 0; 67 } 68 69 free(result); 70 return 1; 71 } 72 73 int test() { 74 int errors = 0; 75 76 expect("a", "a", &errors); 77 expect("\"a\"", "a", &errors); 78 expect("\"\\x61\"", "a", &errors); 79 expect("# this is a comment\n" 80 " a\n" 81 " \n", 82 "a", &errors); 83 84 85 // sequence operator 86 expect("a; b; c", "c", &errors); 87 88 // string concat operator 89 expect("a + b", "ab", &errors); 90 expect("a + \n \"b\"", "ab", &errors); 91 expect("a + b +\nc\n", "abc", &errors); 92 93 // string concat function 94 expect("concat(a, b)", "ab", &errors); 95 expect("concat(a,\n \"b\")", "ab", &errors); 96 expect("concat(a + b,\nc,\"d\")", "abcd", &errors); 97 expect("\"concat\"(a + b,\nc,\"d\")", "abcd", &errors); 98 99 // logical and 100 expect("a && b", "b", &errors); 101 expect("a && \"\"", "", &errors); 102 expect("\"\" && b", "", &errors); 103 expect("\"\" && \"\"", "", &errors); 104 expect("\"\" && abort()", "", &errors); // test short-circuiting 105 expect("t && abort()", NULL, &errors); 106 107 // logical or 108 expect("a || b", "a", &errors); 109 expect("a || \"\"", "a", &errors); 110 expect("\"\" || b", "b", &errors); 111 expect("\"\" || \"\"", "", &errors); 112 expect("a || abort()", "a", &errors); // test short-circuiting 113 expect("\"\" || abort()", NULL, &errors); 114 115 // logical not 116 expect("!a", "", &errors); 117 expect("! \"\"", "t", &errors); 118 expect("!!a", "t", &errors); 119 120 // precedence 121 expect("\"\" == \"\" && b", "b", &errors); 122 expect("a + b == ab", "t", &errors); 123 expect("ab == a + b", "t", &errors); 124 expect("a + (b == ab)", "a", &errors); 125 expect("(ab == a) + b", "b", &errors); 126 127 // substring function 128 expect("is_substring(cad, abracadabra)", "t", &errors); 129 expect("is_substring(abrac, abracadabra)", "t", &errors); 130 expect("is_substring(dabra, abracadabra)", "t", &errors); 131 expect("is_substring(cad, abracxadabra)", "", &errors); 132 expect("is_substring(abrac, axbracadabra)", "", &errors); 133 expect("is_substring(dabra, abracadabrxa)", "", &errors); 134 135 // ifelse function 136 expect("ifelse(t, yes, no)", "yes", &errors); 137 expect("ifelse(!t, yes, no)", "no", &errors); 138 expect("ifelse(t, yes, abort())", "yes", &errors); 139 expect("ifelse(!t, abort(), no)", "no", &errors); 140 141 // if "statements" 142 expect("if t then yes else no endif", "yes", &errors); 143 expect("if \"\" then yes else no endif", "no", &errors); 144 expect("if \"\" then yes endif", "", &errors); 145 expect("if \"\"; t then yes endif", "yes", &errors); 146 147 // numeric comparisons 148 expect("less_than_int(3, 14)", "t", &errors); 149 expect("less_than_int(14, 3)", "", &errors); 150 expect("less_than_int(x, 3)", "", &errors); 151 expect("less_than_int(3, x)", "", &errors); 152 expect("greater_than_int(3, 14)", "", &errors); 153 expect("greater_than_int(14, 3)", "t", &errors); 154 expect("greater_than_int(x, 3)", "", &errors); 155 expect("greater_than_int(3, x)", "", &errors); 156 157 printf("\n"); 158 159 return errors; 160 } 161 162 void ExprDump(int depth, Expr* n, char* script) { 163 printf("%*s", depth*2, ""); 164 char temp = script[n->end]; 165 script[n->end] = '\0'; 166 printf("%s %p (%d-%d) \"%s\"\n", 167 n->name == NULL ? "(NULL)" : n->name, n->fn, n->start, n->end, 168 script+n->start); 169 script[n->end] = temp; 170 int i; 171 for (i = 0; i < n->argc; ++i) { 172 ExprDump(depth+1, n->argv[i], script); 173 } 174 } 175 176 int main(int argc, char** argv) { 177 RegisterBuiltins(); 178 FinishRegistration(); 179 180 if (argc == 1) { 181 return test() != 0; 182 } 183 184 FILE* f = fopen(argv[1], "r"); 185 if (f == NULL) { 186 printf("%s: %s: No such file or directory\n", argv[0], argv[1]); 187 return 1; 188 } 189 char buffer[8192]; 190 int size = fread(buffer, 1, 8191, f); 191 fclose(f); 192 buffer[size] = '\0'; 193 194 Expr* root; 195 int error_count = 0; 196 yy_scan_bytes(buffer, size); 197 int error = yyparse(&root, &error_count); 198 printf("parse returned %d; %d errors encountered\n", error, error_count); 199 if (error == 0 || error_count > 0) { 200 201 ExprDump(0, root, buffer); 202 203 State state; 204 state.cookie = NULL; 205 state.script = buffer; 206 state.errmsg = NULL; 207 208 char* result = Evaluate(&state, root); 209 if (result == NULL) { 210 printf("result was NULL, message is: %s\n", 211 (state.errmsg == NULL ? "(NULL)" : state.errmsg)); 212 free(state.errmsg); 213 } else { 214 printf("result is [%s]\n", result); 215 } 216 } 217 return 0; 218 } 219