/* * Copyright (C) 2020 Jo-Philipp Wich <jo@mein.io> * * Permission to use, copy, modify, and/or distribute this software for any * purpose with or without fee is hereby granted, provided that the above * copyright notice and this permission notice appear in all copies. * * THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES * WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF * MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR * ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES * WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN * ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF * OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE. */ #ifndef __AST_H_ #define __AST_H_ #include <stddef.h> #include <stdint.h> #include <stdbool.h> #ifdef JSONC #include <json.h> #else #include <json-c/json.h> #endif #define UT_ERRMSG_OOM "Runtime error: Memory allocation failure" enum ut_error_type { UT_ERROR_NO_ERROR, UT_ERROR_OUT_OF_MEMORY, UT_ERROR_UNTERMINATED_COMMENT, UT_ERROR_UNTERMINATED_STRING, UT_ERROR_UNTERMINATED_BLOCK, UT_ERROR_UNEXPECTED_TOKEN, UT_ERROR_UNEXPECTED_CHAR, UT_ERROR_OVERLONG_STRING, UT_ERROR_INVALID_ESCAPE, UT_ERROR_NESTED_BLOCKS, UT_ERROR_EXCEPTION }; enum ut_block_type { UT_BLOCK_NONE, UT_BLOCK_STATEMENT, UT_BLOCK_EXPRESSION, UT_BLOCK_COMMENT }; struct ut_opcode { int type; struct json_object *val; struct ut_opcode *operand[4], *next, *sibling; uint32_t off; }; struct ut_state { struct ut_opcode *pool; struct ut_opcode *main; uint8_t semicolon_emitted:1; uint8_t start_tag_seen:1; uint8_t srand_called:1; size_t off; enum ut_block_type blocktype; struct { enum ut_error_type code; union { struct json_object *exception; uint64_t tokens[2]; } info; } error; struct { struct json_object **scope; uint8_t size; uint8_t off; } stack; }; struct ut_opcode *ut_new_op(struct ut_state *s, int type, struct json_object *val, ...); struct ut_opcode *ut_wrap_op(struct ut_opcode *parent, ...); struct ut_opcode *ut_append_op(struct ut_opcode *a, struct ut_opcode *b); enum ut_error_type ut_parse(struct ut_state *s, const char *expr); void ut_free(struct ut_state *s); struct ut_opcode *ut_new_func(struct ut_state *s, struct ut_opcode *name, struct ut_opcode *args, struct ut_opcode *body); struct json_object *json_object_new_double_rounded(double v); struct json_object *json_object_new_null_obj(void); void *ParseAlloc(void *(*mfunc)(size_t)); void Parse(void *pParser, int type, struct ut_opcode *op, struct ut_state *s); void ParseFree(void *pParser, void (*ffunc)(void *)); static inline uint32_t getrefcnt(struct json_object *v) { struct { enum json_type o_type; uint32_t _ref_count; } *spy = (void *)v; return spy ? spy->_ref_count : 0; } #endif /* __AST_H_ */