diff options
Diffstat (limited to 'src/mds-kbdc/make-tree.c')
| -rw-r--r-- | src/mds-kbdc/make-tree.c | 128 |
1 files changed, 61 insertions, 67 deletions
diff --git a/src/mds-kbdc/make-tree.c b/src/mds-kbdc/make-tree.c index 2062f73..5e87269 100644 --- a/src/mds-kbdc/make-tree.c +++ b/src/mds-kbdc/make-tree.c @@ -78,7 +78,7 @@ * Pointer to the beginning of the current line */ #define LINE \ - (parsing_result->source_code->lines[line_i]) + (result->source_code->lines[line_i]) /** @@ -98,7 +98,7 @@ * @scope error:mds_kbdc_parse_error_t* Variable where the new error will be stored */ #define NEW_ERROR(ERROR_IS_IN_FILE, SEVERITY, ...) \ - NEW_ERROR_(parsing_result, SEVERITY, ERROR_IS_IN_FILE, line_i, \ + NEW_ERROR_(result, SEVERITY, ERROR_IS_IN_FILE, line_i, \ (size_t)(line - LINE), (size_t)(end - LINE), 1, __VA_ARGS__) @@ -650,59 +650,44 @@ /** - * The parsing state + * Variable whether the latest created error is stored */ -static struct state -{ - /** - * Output parameter for the parsing result - */ - mds_kbdc_parsed_t* restrict parsing_result_; - - /** - * The head of the parsing-stack - */ - size_t stack_ptr_; - - /** - * The keyword portion of the parsing-stack - */ - const char** restrict keyword_stack_; - - /** - * The tree portion of the parsing-stack - */ - mds_kbdc_tree_t*** restrict tree_stack_; - - /** - * The index of the currently parsed line - */ - size_t line_i_; - - /** - * Whether an array is currently being parsed - */ - int in_array_; - -} state; +static mds_kbdc_parse_error_t* error; +/** + * Output parameter for the parsing result + */ +static mds_kbdc_parsed_t* restrict result; -/* Shorthands for the state variables. */ -#define parsing_result (state.parsing_result_) -#define stack_ptr (state.stack_ptr_) -#define keyword_stack (state.keyword_stack_) -#define tree_stack (state.tree_stack_) -#define line_i (state.line_i_) -#define in_array (state.in_array_) +/** + * The head of the parsing-stack + */ +static size_t stack_ptr; +/** + * The keyword portion of the parsing-stack + */ +static const char** restrict keyword_stack; +/** + * The tree portion of the parsing-stack + */ +static mds_kbdc_tree_t*** restrict tree_stack; /** - * Variable whether the latest created error is stored + * The index of the currently parsed line */ -static mds_kbdc_parse_error_t* error; +static size_t line_i; + +/** + * Whether an array is currently being parsed + */ +static int in_array; + +/*** Pre-parsing procedures. ***/ + /** * Get the pathname name of the parsed file @@ -718,24 +703,24 @@ static int get_pathname(const char* restrict filename) /* Get a non-relative pathname for the file, relative filenames * can be misleading as the program can have changed working * directory to be able to resolve filenames. */ - parsing_result->pathname = abspath(filename); - if (parsing_result->pathname == NULL) + result->pathname = abspath(filename); + if (result->pathname == NULL) { fail_if (errno != ENOENT); saved_errno = errno; fail_if ((cwd = curpath(), cwd == NULL)); - parsing_result->pathname = strdup(filename); - fail_if (parsing_result->pathname == NULL); - NEW_ERROR_(parsing_result, ERROR, 0, 0, 0, 0, 1, "no such file or directory in ‘%s’", cwd); + result->pathname = strdup(filename); + fail_if (result->pathname == NULL); + NEW_ERROR_(result, ERROR, 0, 0, 0, 0, 1, "no such file or directory in ‘%s’", cwd); free(cwd); return 0; } /* Check that the file exists and can be read. */ - if (access(parsing_result->pathname, R_OK) < 0) + if (access(result->pathname, R_OK) < 0) { saved_errno = errno; - NEW_ERROR_(parsing_result, ERROR, 0, 0, 0, 0, 0, NULL); + NEW_ERROR_(result, ERROR, 0, 0, 0, 0, 0, NULL); error->description = strdup(strerror(saved_errno)); fail_if (error->description == NULL); return 0; @@ -760,7 +745,7 @@ static int allocate_stacks(void) /* The maximum line-length is needed because lines can have there own stacking, * like sequence mapping lines, additionally, let statements can have one array. */ - for (line_i = 0, line_n = parsing_result->source_code->line_count; line_i < line_n; line_i++) + for (line_i = 0, line_n = result->source_code->line_count; line_i < line_n; line_i++) { cur_line_length = strlen(LINE); if (max_line_length < cur_line_length) @@ -784,7 +769,7 @@ static int allocate_stacks(void) static int read_source_code(void) { /* Read the file and simplify it a bit. */ - fail_if (read_source_lines(parsing_result->pathname, parsing_result->source_code) < 0); + fail_if (read_source_lines(result->pathname, result->source_code) < 0); return 0; pfail: @@ -792,6 +777,10 @@ static int read_source_code(void) } + +/*** Post-parsing procedures. ***/ + + /** * Check that a the file did not end prematurely by checking * that the stack has been fully popped @@ -845,8 +834,8 @@ static int check_whether_file_is_empty(void) char* end = NULL; /* Warn about empty files. */ - if (parsing_result->tree == NULL) - if (parsing_result->errors_ptr == 0) + if (result->tree == NULL) + if (result->errors_ptr == 0) NEW_ERROR(0, WARNING, "file is empty"); return 0; @@ -855,6 +844,10 @@ static int check_whether_file_is_empty(void) } + +/*** Parsing procedures. ***/ + + /** * Parse a line * @@ -1163,23 +1156,30 @@ static int parse_line(void) } + +/*** Parsing root-procedure. ***/ + + /** * Parse a file into a syntax tree * * @param filename The filename of the file to parse - * @param result Output parameter for the parsing result + * @param result_ Output parameter for the parsing result * @return -1 if an error occursed that cannot be stored in `result`, zero otherwise */ -int parse_to_tree(const char* restrict filename, mds_kbdc_parsed_t* restrict result) +int parse_to_tree(const char* restrict filename, mds_kbdc_parsed_t* restrict result_) { size_t line_n; int r, saved_errno; /* Prepare parsing. */ - - memset(&state, 0, sizeof(state)); - parsing_result = result; + result = result_; + stack_ptr = 0; + keyword_stack = NULL; + tree_stack = NULL; + line_i = 0; + in_array = 0; fail_if (xmalloc(result->source_code, 1, mds_kbdc_source_code_t)); mds_kbdc_source_code_initialise(result->source_code); @@ -1217,12 +1217,6 @@ int parse_to_tree(const char* restrict filename, mds_kbdc_parsed_t* restrict res -#undef in_array -#undef line_i -#undef parsing_result -#undef stack_ptr -#undef keyword_stack -#undef tree_stack #undef MAKE_BRANCH #undef MAKE_LEAF #undef SEQUENCE_FULLY_POPPED |