diff options
Diffstat (limited to '05/preprocess.b')
| -rw-r--r-- | 05/preprocess.b | 63 |
1 files changed, 62 insertions, 1 deletions
diff --git a/05/preprocess.b b/05/preprocess.b index 93c7c63..76df9aa 100644 --- a/05/preprocess.b +++ b/05/preprocess.b @@ -452,6 +452,18 @@ function pptoken_skip_spaces *8p_in = in return +function pptoken_skip_to_newline + argument p_in + local in + in = *8p_in + :pptoken_skip_to_newline_loop + if *1in == 10 goto pptoken_skip_to_newline_end + pptoken_skip(&in) + goto pptoken_skip_to_newline_loop + :pptoken_skip_to_newline_end + *8p_in = in + return + ; phase 4: ; Preprocessing directives are executed and macro invocations are expanded. ; A #include preprocessing directive causes the named header or source file to be processed from phase 1 through phase 4, recursively. @@ -506,6 +518,10 @@ function translation_phase_4 if b != 0 goto pp_directive_define b = str_equals(in, .str_undef) if b != 0 goto pp_directive_undef + b = str_equals(in, .str_pragma) + if b != 0 goto pp_directive_pragma + b = str_equals(in, .str_line) + if b != 0 goto pp_directive_line goto unrecognized_directive :pp_directive_error fputs(2, filename) @@ -513,6 +529,39 @@ function translation_phase_4 fputn(2, line_number) fputs(2, .str_directive_error) exit(1) + :pp_directive_line + ; at this stage, we just turn #line directives into a nicer format: + ; {$line_number filename} e.g. {$77 main.c} + local new_line_number + pptoken_skip(&in) + pptoken_skip_spaces(&in) + new_line_number = stoi(in) + new_line_number -= 1 ; #line directive applies to the following line + *1out = '$ + out += 1 + ; copy line number + p = itos(new_line_number) + out = strcpy(out, p) + *1out = 32 + out += 1 + pptoken_skip(&in) + pptoken_skip_spaces(&in) + if *1in == 10 goto ppdirective_line_no_filename + if *1in != '" goto bad_line_directive + ; copy filename + in += 1 + filename = out + out = memccpy(out, in, '") + *1out = 0 + out += 1 + goto ppdirective_line_cont + :ppdirective_line_no_filename + out = strcpy(out, filename) + out += 1 + :ppdirective_line_cont + pptoken_skip_to_newline(&in) + line_number = new_line_number + goto process_pptoken :pp_directive_undef pptoken_skip(&in) pptoken_skip_spaces(&in) @@ -622,7 +671,14 @@ function translation_phase_4 function_macros_size = p - function_macros free(param_names) goto phase4_next_line - + :pp_directive_pragma + ; we don't have any pragmas + compile_warning(filename, line_number, .str_unrecognized_pragma) + pptoken_skip_to_newline(&in) + goto process_pptoken + :str_unrecognized_pragma + string Unrecognized #pragma. + byte 0 :str_directive_error string : #error byte 10 @@ -654,6 +710,11 @@ function translation_phase_4 :str_bad_undef string Bad #undef. byte 0 + :bad_line_directive + compile_error(filename, line_number, .str_bad_line_directive) + :str_bad_line_directive + string Bad #line. + byte 0 ; returns a pointer to the replacement pptokens, or 0 if this macro is not defined function look_up_macro |