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On the road to 1.0: source code cleanup

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This commit is contained in:
David Schmenk 2017-06-03 08:08:30 -07:00
parent f1c11d6b97
commit 47ed2014e3
1 changed files with 44 additions and 28 deletions
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72
src/toolsrc/lex.c
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@ -1,10 +1,10 @@
/* /*
* Copyright (C) 2015 The 8-Bit Bunch. Licensed under the Apache License, Version 1.1 * Copyright (C) 2015 The 8-Bit Bunch. Licensed under the Apache License, Version 1.1
* (the "License"); you may not use this file except in compliance with the License. * (the "License"); you may not use this file except in compliance with the License.
* You may obtain a copy of the License at <http://www.apache.org/licenses/LICENSE-1.1>. * You may obtain a copy of the License at <http://www.apache.org/licenses/LICENSE-1.1>.
* Unless required by applicable law or agreed to in writing, software distributed under * Unless required by applicable law or agreed to in writing, software distributed under
* the License is distributed on an "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF * the License is distributed on an "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF
* ANY KIND, either express or implied. See the License for the specific language * ANY KIND, either express or implied. See the License for the specific language
* governing permissions and limitations under the License. * governing permissions and limitations under the License.
*/ */
@ -37,31 +37,31 @@ t_token keywords[] = {
DEFAULT_TOKEN, 'O', 'T', 'H', 'E', 'R', 'W', 'I', 'S', 'E', DEFAULT_TOKEN, 'O', 'T', 'H', 'E', 'R', 'W', 'I', 'S', 'E',
ENDCASE_TOKEN, 'W', 'E', 'N', 'D', ENDCASE_TOKEN, 'W', 'E', 'N', 'D',
FOR_TOKEN, 'F', 'O', 'R', FOR_TOKEN, 'F', 'O', 'R',
TO_TOKEN, 'T', 'O', TO_TOKEN, 'T', 'O',
DOWNTO_TOKEN, 'D', 'O', 'W', 'N', 'T', 'O', DOWNTO_TOKEN, 'D', 'O', 'W', 'N', 'T', 'O',
STEP_TOKEN, 'S', 'T', 'E', 'P', STEP_TOKEN, 'S', 'T', 'E', 'P',
NEXT_TOKEN, 'N', 'E', 'X', 'T', NEXT_TOKEN, 'N', 'E', 'X', 'T',
REPEAT_TOKEN, 'R', 'E', 'P', 'E', 'A', 'T', REPEAT_TOKEN, 'R', 'E', 'P', 'E', 'A', 'T',
UNTIL_TOKEN, 'U', 'N', 'T', 'I', 'L', UNTIL_TOKEN, 'U', 'N', 'T', 'I', 'L',
BREAK_TOKEN, 'B', 'R', 'E', 'A', 'K', BREAK_TOKEN, 'B', 'R', 'E', 'A', 'K',
CONTINUE_TOKEN, 'C', 'O', 'N', 'T', 'I', 'N', 'U', 'E', CONTINUE_TOKEN, 'C', 'O', 'N', 'T', 'I', 'N', 'U', 'E',
ASM_TOKEN, 'A', 'S', 'M', ASM_TOKEN, 'A', 'S', 'M',
DEF_TOKEN, 'D', 'E', 'F', DEF_TOKEN, 'D', 'E', 'F',
EXPORT_TOKEN, 'E', 'X', 'P', 'O', 'R', 'T', EXPORT_TOKEN, 'E', 'X', 'P', 'O', 'R', 'T',
IMPORT_TOKEN, 'I', 'M', 'P', 'O', 'R', 'T', IMPORT_TOKEN, 'I', 'M', 'P', 'O', 'R', 'T',
INCLUDE_TOKEN, 'I', 'N', 'C', 'L', 'U', 'D', 'E', INCLUDE_TOKEN, 'I', 'N', 'C', 'L', 'U', 'D', 'E',
RETURN_TOKEN, 'R', 'E', 'T', 'U', 'R', 'N', RETURN_TOKEN, 'R', 'E', 'T', 'U', 'R', 'N',
END_TOKEN, 'E', 'N', 'D', END_TOKEN, 'E', 'N', 'D',
DONE_TOKEN, 'D', 'O', 'N', 'E', DONE_TOKEN, 'D', 'O', 'N', 'E',
LOGIC_NOT_TOKEN, 'N', 'O', 'T', LOGIC_NOT_TOKEN, 'N', 'O', 'T',
LOGIC_AND_TOKEN, 'A', 'N', 'D', LOGIC_AND_TOKEN, 'A', 'N', 'D',
LOGIC_OR_TOKEN, 'O', 'R', LOGIC_OR_TOKEN, 'O', 'R',
BYTE_TOKEN, 'B', 'Y', 'T', 'E', BYTE_TOKEN, 'B', 'Y', 'T', 'E',
WORD_TOKEN, 'W', 'O', 'R', 'D', WORD_TOKEN, 'W', 'O', 'R', 'D',
CONST_TOKEN, 'C', 'O', 'N', 'S', 'T', CONST_TOKEN, 'C', 'O', 'N', 'S', 'T',
STRUC_TOKEN, 'S', 'T', 'R', 'U', 'C', STRUC_TOKEN, 'S', 'T', 'R', 'U', 'C',
PREDEF_TOKEN, 'P', 'R', 'E', 'D', 'E', 'F', PREDEF_TOKEN, 'P', 'R', 'E', 'D', 'E', 'F',
SYSFLAGS_TOKEN, 'S', 'Y', 'S', 'F', 'L', 'A', 'G', 'S', SYSFLAGS_TOKEN, 'S', 'Y', 'S', 'F', 'L', 'A', 'G', 'S',
EOL_TOKEN EOL_TOKEN
}; };
@ -428,8 +428,11 @@ int next_line(void)
int len; int len;
t_token token; t_token token;
char* new_filename; char* new_filename;
if (inputfile == NULL) { if (inputfile == NULL)
// First-time init {
/*
* First-time init
*/
inputfile = stdin; inputfile = stdin;
filename = (char*) "<stdin>"; filename = (char*) "<stdin>";
} }
@ -442,11 +445,17 @@ int next_line(void)
{ {
statement = inputline; statement = inputline;
scanpos = inputline; scanpos = inputline;
// Read next line from the current file, and strip newline from the end. /*
if (fgets(inputline, 512, inputfile) == NULL) { * Read next line from the current file, and strip newline from the end.
*/
if (fgets(inputline, 512, inputfile) == NULL)
{
inputline[0] = 0; inputline[0] = 0;
// At end of file, return to previous file if any, else return EOF_TOKEN /*
if (outer_inputfile != NULL) { * At end of file, return to previous file if any, else return EOF_TOKEN
*/
if (outer_inputfile != NULL)
{
fclose(inputfile); fclose(inputfile);
free(filename); free(filename);
inputfile = outer_inputfile; inputfile = outer_inputfile;
@ -454,7 +463,8 @@ int next_line(void)
lineno = outer_lineno - 1; // -1 because we're about to incr again lineno = outer_lineno - 1; // -1 because we're about to incr again
outer_inputfile = NULL; outer_inputfile = NULL;
} }
else { else
{
scantoken = EOF_TOKEN; scantoken = EOF_TOKEN;
return EOF_TOKEN; return EOF_TOKEN;
} }
@ -467,15 +477,20 @@ int next_line(void)
printf("; %s: %04d: %s\n", filename, lineno, inputline); printf("; %s: %04d: %s\n", filename, lineno, inputline);
} }
token = scan(); token = scan();
// Handle single level of file inclusion /*
if (token == INCLUDE_TOKEN) { * Handle single level of file inclusion
*/
if (token == INCLUDE_TOKEN)
{
token = scan(); token = scan();
if (token != STRING_TOKEN) { if (token != STRING_TOKEN)
{
parse_error("Missing include filename"); parse_error("Missing include filename");
scantoken = EOF_TOKEN; scantoken = EOF_TOKEN;
return EOF_TOKEN; return EOF_TOKEN;
} }
if (outer_inputfile != NULL) { if (outer_inputfile != NULL)
{
parse_error("Only one level of includes allowed"); parse_error("Only one level of includes allowed");
scantoken = EOF_TOKEN; scantoken = EOF_TOKEN;
return EOF_TOKEN; return EOF_TOKEN;
@ -487,7 +502,8 @@ int next_line(void)
strncpy(new_filename, (char*)constval, tokenlen-2); strncpy(new_filename, (char*)constval, tokenlen-2);
new_filename[tokenlen-2] = 0; new_filename[tokenlen-2] = 0;
inputfile = fopen(new_filename, "r"); inputfile = fopen(new_filename, "r");
if (inputfile == NULL) { if (inputfile == NULL)
{
parse_error("Error opening include file"); parse_error("Error opening include file");
scantoken = EOF_TOKEN; scantoken = EOF_TOKEN;
return EOF_TOKEN; return EOF_TOKEN;