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Functions | |
| int | ast_expr (char *expr, char *buf, int length) |
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Definition at line 2912 of file ast_expr2f.c. References AST_EXPR_integer, ast_yy_scan_string(), ast_yylex_destroy(), ast_yylex_init(), ast_yyparse(), and free. Referenced by pbx_substitute_variables_helper_full(). 02913 {
02914 struct parse_io io;
02915 int return_value = 0;
02916
02917 memset(&io, 0, sizeof(io));
02918 io.string = expr; /* to pass to the error routine */
02919
02920 ast_yylex_init(&io.scanner);
02921
02922 ast_yy_scan_string(expr, io.scanner);
02923
02924 ast_yyparse ((void *) &io);
02925
02926 ast_yylex_destroy(io.scanner);
02927
02928 if (!io.val) {
02929 if (length > 1) {
02930 strcpy(buf, "0");
02931 return_value = 1;
02932 }
02933 } else {
02934 if (io.val->type == AST_EXPR_integer) {
02935 int res_length;
02936
02937 res_length = snprintf(buf, length, "%ld", (long int) io.val->u.i);
02938 return_value = (res_length <= length) ? res_length : length;
02939 } else {
02940 #ifdef STANDALONE
02941 strncpy(buf, io.val->u.s, length - 1);
02942 #else /* !STANDALONE */
02943 ast_copy_string(buf, io.val->u.s, length);
02944 #endif /* STANDALONE */
02945 return_value = strlen(buf);
02946 free(io.val->u.s);
02947 }
02948 free(io.val);
02949 }
02950 return return_value;
02951 }
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1.4.2