diff options
Diffstat (limited to 'edify/main.c')
| -rw-r--r-- | edify/main.c | 213 |
1 files changed, 213 insertions, 0 deletions
diff --git a/edify/main.c b/edify/main.c new file mode 100644 index 000000000..0e3610847 --- /dev/null +++ b/edify/main.c @@ -0,0 +1,213 @@ +/* + * Copyright (C) 2009 The Android Open Source Project + * + * Licensed under the Apache License, Version 2.0 (the "License"); + * you may not use this file except in compliance with the License. + * You may obtain a copy of the License at + * + * http://www.apache.org/licenses/LICENSE-2.0 + * + * Unless required by applicable law or agreed to in writing, software + * distributed under the License is distributed on an "AS IS" BASIS, + * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. + * See the License for the specific language governing permissions and + * limitations under the License. + */ + +#include <stdio.h> +#include <stdlib.h> +#include <string.h> + +#include "expr.h" +#include "parser.h" + +extern int yyparse(Expr** root, int* error_count); + +int expect(const char* expr_str, const char* expected, int* errors) { + Expr* e; + int error; + char* result; + + printf("."); + + yy_scan_string(expr_str); + int error_count = 0; + error = yyparse(&e, &error_count); + if (error > 0 || error_count > 0) { + fprintf(stderr, "error parsing \"%s\" (%d errors)\n", + expr_str, error_count); + ++*errors; + return 0; + } + + State state; + state.cookie = NULL; + state.script = expr_str; + state.errmsg = NULL; + + result = Evaluate(&state, e); + free(state.errmsg); + if (result == NULL && expected != NULL) { + fprintf(stderr, "error evaluating \"%s\"\n", expr_str); + ++*errors; + return 0; + } + + if (result == NULL && expected == NULL) { + return 1; + } + + if (strcmp(result, expected) != 0) { + fprintf(stderr, "evaluating \"%s\": expected \"%s\", got \"%s\"\n", + expr_str, expected, result); + ++*errors; + free(result); + return 0; + } + + free(result); + return 1; +} + +int test() { + int errors = 0; + + expect("a", "a", &errors); + expect("\"a\"", "a", &errors); + expect("\"\\x61\"", "a", &errors); + expect("# this is a comment\n" + " a\n" + " \n", + "a", &errors); + + + // sequence operator + expect("a; b; c", "c", &errors); + + // string concat operator + expect("a + b", "ab", &errors); + expect("a + \n \"b\"", "ab", &errors); + expect("a + b +\nc\n", "abc", &errors); + + // string concat function + expect("concat(a, b)", "ab", &errors); + expect("concat(a,\n \"b\")", "ab", &errors); + expect("concat(a + b,\nc,\"d\")", "abcd", &errors); + expect("\"concat\"(a + b,\nc,\"d\")", "abcd", &errors); + + // logical and + expect("a && b", "b", &errors); + expect("a && \"\"", "", &errors); + expect("\"\" && b", "", &errors); + expect("\"\" && \"\"", "", &errors); + expect("\"\" && abort()", "", &errors); // test short-circuiting + expect("t && abort()", NULL, &errors); + + // logical or + expect("a || b", "a", &errors); + expect("a || \"\"", "a", &errors); + expect("\"\" || b", "b", &errors); + expect("\"\" || \"\"", "", &errors); + expect("a || abort()", "a", &errors); // test short-circuiting + expect("\"\" || abort()", NULL, &errors); + + // logical not + expect("!a", "", &errors); + expect("! \"\"", "t", &errors); + expect("!!a", "t", &errors); + + // precedence + expect("\"\" == \"\" && b", "b", &errors); + expect("a + b == ab", "t", &errors); + expect("ab == a + b", "t", &errors); + expect("a + (b == ab)", "a", &errors); + expect("(ab == a) + b", "b", &errors); + + // substring function + expect("is_substring(cad, abracadabra)", "t", &errors); + expect("is_substring(abrac, abracadabra)", "t", &errors); + expect("is_substring(dabra, abracadabra)", "t", &errors); + expect("is_substring(cad, abracxadabra)", "", &errors); + expect("is_substring(abrac, axbracadabra)", "", &errors); + expect("is_substring(dabra, abracadabrxa)", "", &errors); + + // ifelse function + expect("ifelse(t, yes, no)", "yes", &errors); + expect("ifelse(!t, yes, no)", "no", &errors); + expect("ifelse(t, yes, abort())", "yes", &errors); + expect("ifelse(!t, abort(), no)", "no", &errors); + + // if "statements" + expect("if t then yes else no endif", "yes", &errors); + expect("if \"\" then yes else no endif", "no", &errors); + expect("if \"\" then yes endif", "", &errors); + expect("if \"\"; t then yes endif", "yes", &errors); + + // numeric comparisons + expect("less_than_int(3, 14)", "t", &errors); + expect("less_than_int(14, 3)", "", &errors); + expect("less_than_int(x, 3)", "", &errors); + expect("less_than_int(3, x)", "", &errors); + expect("greater_than_int(3, 14)", "", &errors); + expect("greater_than_int(14, 3)", "t", &errors); + expect("greater_than_int(x, 3)", "", &errors); + expect("greater_than_int(3, x)", "", &errors); + + printf("\n"); + + return errors; +} + +void ExprDump(int depth, Expr* n, char* script) { + printf("%*s", depth*2, ""); + char temp = script[n->end]; + script[n->end] = '\0'; + printf("%s %p (%d-%d) \"%s\"\n", + n->name == NULL ? "(NULL)" : n->name, n->fn, n->start, n->end, + script+n->start); + script[n->end] = temp; + int i; + for (i = 0; i < n->argc; ++i) { + ExprDump(depth+1, n->argv[i], script); + } +} + +int main(int argc, char** argv) { + RegisterBuiltins(); + FinishRegistration(); + + if (argc == 1) { + return test() != 0; + } + + FILE* f = fopen(argv[1], "r"); + char buffer[8192]; + int size = fread(buffer, 1, 8191, f); + fclose(f); + buffer[size] = '\0'; + + Expr* root; + int error_count = 0; + yy_scan_bytes(buffer, size); + int error = yyparse(&root, &error_count); + printf("parse returned %d; %d errors encountered\n", error, error_count); + if (error == 0 || error_count > 0) { + + ExprDump(0, root, buffer); + + State state; + state.cookie = NULL; + state.script = buffer; + state.errmsg = NULL; + + char* result = Evaluate(&state, root); + if (result == NULL) { + printf("result was NULL, message is: %s\n", + (state.errmsg == NULL ? "(NULL)" : state.errmsg)); + free(state.errmsg); + } else { + printf("result is [%s]\n", result); + } + } + return 0; +} |