diff options
Diffstat (limited to '')
| -rw-r--r-- | src/mds-kbdc/make-tree.c | 115 |
1 files changed, 73 insertions, 42 deletions
diff --git a/src/mds-kbdc/make-tree.c b/src/mds-kbdc/make-tree.c index 80faf5f..d0453b0 100644 --- a/src/mds-kbdc/make-tree.c +++ b/src/mds-kbdc/make-tree.c @@ -42,14 +42,38 @@ int parse_to_tree(const char* restrict filename, mds_kbdc_tree_t** restrict result, mds_kbdc_parse_error_t*** restrict errors) { +#define xasprintf(var, ...) (asprintf(&(var), __VA_ARGS__) < 0 ? (var = NULL, -1) : 0) +#define NEW_ERROR(ERROR_IS_IN_FILE, SEVERITY, ...) \ + if (errors_ptr + 1 >= errors_size) \ + { \ + errors_size = errors_size ? (errors_size << 1) : 2; \ + fail_if (xxrealloc(old_errors, *errors, errors_size, mds_kbdc_parse_error_t*)); \ + } \ + fail_if (xcalloc(error, 1, mds_kbdc_parse_error_t)); \ + (*errors)[errors_ptr + 0] = error; \ + (*errors)[errors_ptr + 1] = NULL; \ + errors_ptr++; \ + error->line = line_i; \ + error->severity = MDS_KBDC_PARSE_ERROR_##SEVERITY; \ + error->error_is_in_file = ERROR_IS_IN_FILE; \ + error->start = (size_t)(line - source_code.lines[line_i]); \ + error->end = (size_t)(end - source_code.lines[line_i]); \ + fail_if ((error->pathname = strdup(pathname)) == NULL); \ + fail_if ((error->code = strdup(source_code.real_lines[line_i])) == NULL); \ + fail_if (xasprintf(error->description, __VA_ARGS__)) + + mds_kbdc_parse_error_t* error; mds_kbdc_parse_error_t** old_errors = NULL; char* pathname; source_code_t source_code; size_t errors_size = 0; size_t errors_ptr = 0; size_t line_i, line_n; + const char** keyword_stack = NULL; + size_t stack_ptr = 0; int saved_errno; + *result = NULL; *errors = NULL; source_code_initialise(&source_code); @@ -83,6 +107,8 @@ int parse_to_tree(const char* restrict filename, mds_kbdc_tree_t** restrict resu fail_if (read_source_lines(pathname, &source_code) < 0); /* TODO '\t':s should be expanded into ' ':s. */ + fail_if (xmalloc(keyword_stack, source_code.line_count, const char*)); + for (line_i = 0, line_n = source_code.line_count; line_i < line_n; line_i++) { char* line = source_code.lines[line_i]; @@ -97,68 +123,73 @@ int parse_to_tree(const char* restrict filename, mds_kbdc_tree_t** restrict resu prev_end_char = *end; *end = '\0'; - if (!strcmp(line, "information")) ; - else if (!strcmp(line, "language")) ; - else if (!strcmp(line, "country")) ; - else if (!strcmp(line, "variant")) ; - else if (!strcmp(line, "include")) ; - else if (!strcmp(line, "function")) ; - else if (!strcmp(line, "macro")) ; - else if (!strcmp(line, "assumption")) ; - else if (!strcmp(line, "if")) ; - else if (!strcmp(line, "else")) ; - else if (!strcmp(line, "for")) ; - else if (!strcmp(line, "end")) ; - else if (!strcmp(line, "return")) ; - else if (!strcmp(line, "continue")) ; - else if (!strcmp(line, "break")) ; - else if (!strcmp(line, "let")) ; - else if (!strcmp(line, "have")) ; - else if (!strcmp(line, "have_chars")) ; - else if (!strcmp(line, "have_range")) ; - else if (strchr("\"<([", *line) || strchr(line, '(')) ; - else + if (!strcmp(line, "information")) ; + else if (!strcmp(line, "language")) ; + else if (!strcmp(line, "country")) ; + else if (!strcmp(line, "variant")) ; + else if (!strcmp(line, "include")) ; + else if (!strcmp(line, "function")) ; + else if (!strcmp(line, "macro")) ; + else if (!strcmp(line, "assumption")) ; + else if (!strcmp(line, "if")) ; + else if (!strcmp(line, "else")) ; + else if (!strcmp(line, "for")) ; + else if (!strcmp(line, "return")) ; + else if (!strcmp(line, "continue")) ; + else if (!strcmp(line, "break")) ; + else if (!strcmp(line, "let")) ; + else if (!strcmp(line, "have")) ; + else if (!strcmp(line, "have_chars")) ; + else if (!strcmp(line, "have_range")) ; + else if (!strcmp(line, "end")) { - mds_kbdc_parse_error_t* error; - - if (errors_ptr + 1 >= errors_size) + char* original = line; + if (stack_ptr == 0) + { + NEW_ERROR(1, ERROR, "stray ‘end’ statement"); + goto next; + } + *end = prev_end_char; + stack_ptr--; + line += 3; + while (*line && (*line == ' ')) + line++; + if (*line == '\0') { - errors_size = errors_size ? (errors_size << 1) : 2; - fail_if (xxrealloc(old_errors, *errors, errors_size, mds_kbdc_parse_error_t*)); + line = original; + NEW_ERROR(1, ERROR, "expecting a keyword after ‘end’"); } - - fail_if (xcalloc(error, 1, mds_kbdc_parse_error_t)); - (*errors)[errors_ptr + 0] = error; - (*errors)[errors_ptr + 1] = NULL; - errors_ptr++; - - error->severity = MDS_KBDC_PARSE_ERROR_ERROR; - error->error_is_in_file = 1; - fail_if ((error->pathname = strdup(pathname)) == NULL); - error->line = line_i; - error->start = (size_t)(line - source_code.lines[line_i]); - error->end = (size_t)(end - source_code.lines[line_i]); - fail_if ((error->code = strdup(source_code.real_lines[line_i])) == NULL); - if (asprintf(&(error->description), "invalid keyword ‘%s’", line) < 0) + else if (!strcmp(line, keyword_stack[stack_ptr])) { - error->description = NULL; - goto pfail; + NEW_ERROR(1, ERROR, "expected ‘%s’ but got ‘%s’", keyword_stack[stack_ptr], line); } } + else if (strchr("\"<([", *line) || strchr(line, '(')) ; + else + { + NEW_ERROR(1, ERROR, "invalid keyword ‘%s’", line); + } + next: *end = prev_end_char; } free(pathname); + free(keyword_stack); source_code_destroy(&source_code); return 0; pfail: saved_errno = errno; free(pathname); + free(keyword_stack); source_code_destroy(&source_code); mds_kbdc_parse_error_free_all(old_errors); mds_kbdc_parse_error_free_all(*errors), *errors = NULL; + mds_kbdc_tree_free(*result), *result = NULL; return errno = saved_errno, -1; + +#undef NEW_ERROR +#undef xasprintf } |