/** Read one single option from file into the given buffer.
When the first separator is encountered it returns.
Actions:
- read chars while not eof
- skip comments (parts beginning with '#' and ending with '\n')
- switch to DATA STATE if non space char is encountered
- assume first name in lines to be a long option name by adding '--' if necesssary
- add data to buffer
- do not forget a 0 at the end
* States:
* NEW_LINE - wait here until some option. Add '--' if not already there
* SPACE - between options. Like NEW_LINE but no additions
* DATA - real data. Stop on space.
* COMMENT - everything beginning with # until EOLine
* ESCAPE - everything that is otherwise (incl. spaces). Next char is raw copied.
*/
static RC_TYPE parser_read_option(OPTION_FILE_PARSER *p_cfg, char *p_buffer, int maxlen)
{
RC_TYPE rc = RC_OK;
BOOL parse_end = FALSE;
int count = 0;
*p_buffer = 0;
while (!parse_end)
{
char ch;
{
int n;
if ((n = fscanf(p_cfg->p_file, "%c", &ch)) < 0)
{
if (feof(p_cfg->p_file))
{
break;
}
rc = RC_FILE_IO_READ_ERROR;
break;
}
}
switch (p_cfg->state)
{
case NEW_LINE:
if (ch == '\\')
{
p_cfg->state = ESCAPE;
break;
}
if (ch == '#') /*comment*/
{
p_cfg->state = COMMENT;
break;
}
if (!isspace(ch))
{
if (ch != '-')/*add '--' to first word in line*/
{
if ((rc = push_in_buffer("--", 2, p_buffer, &count, maxlen)) != RC_OK)
{
break;
}
}
if ((rc = push_in_buffer(&ch, 1, p_buffer, &count, maxlen)) != RC_OK)
{
break;
}
p_cfg->state = DATA;
break;
}
/*skip actual leading spaces*/
break;
case SPACE:
if (ch == '\\')
{
p_cfg->state = ESCAPE;
break;
}
if (ch == '#') /*comment*/
{
p_cfg->state = COMMENT;
break;
}
if (ch == '\n' || ch == '\r')
{
p_cfg->state = NEW_LINE;
break;
}
if (!isspace(ch))
{
if ((rc = push_in_buffer(&ch, 1, p_buffer, &count, maxlen)) != RC_OK)
{
break;
}
p_cfg->state = DATA;
break;
}
break;
case COMMENT:
if (ch == '\n' || ch == '\r')
{
p_cfg->state = NEW_LINE;
}
/*skip comments*/
break;
case DATA:
if (ch == '\\')
{
p_cfg->state = ESCAPE;
break;
}
if (ch == '#')
{
p_cfg->state = COMMENT;
break;
}
if (ch == '\n' || ch == '\r')
{
p_cfg->state = NEW_LINE;
parse_end = TRUE;
break;
}
if (isspace(ch))
{
p_cfg->state = SPACE;
parse_end = TRUE;
break;
}
/*actual data*/
if ((rc = push_in_buffer(&ch, 1, p_buffer, &count, maxlen)) != RC_OK)
{
break;
}
break;
case ESCAPE:
if ((rc = push_in_buffer(&ch, 1, p_buffer, &count, maxlen)) != RC_OK)
{
break;
}
p_cfg->state = DATA;
break;
default:
rc = RC_CMD_PARSER_INVALID_OPTION;
}
if (rc != RC_OK)
{
break;
}
}
if (rc == RC_OK)
{
char ch = 0;
rc = push_in_buffer(&ch, 1, p_buffer, &count, maxlen);
}
return rc;
}
/** Read one single option from file into the given buffer.
When the first separator is encountered it returns.
Actions:
- read chars while not eof
- skip comments (parts beginning with '#' and ending with '\n')
- switch to DATA STATE if non space char is encountered
- assume first name in lines to be a long option name by adding '--' if necesssary
- add data to buffer
- do not forget a 0 at the end
* States:
* NEW_LINE - wait here until some option. Add '--' if not already there
* SPACE - between options. Like NEW_LINE but no additions
* DATA - real data. Stop on space.
* COMMENT - everything beginning with # until EOLine
* ESCAPE - everything that is otherwise (incl. spaces). Next char is raw copied.
*/
static int parser_read_option(cfg_parser_t *cfg, char *p_buffer, int maxlen)
{
int rc = 0;
int parse_end = 0;
int count = 0;
*p_buffer = 0;
while (!parse_end) {
char ch;
{
int n;
if ((n = fscanf(cfg->fp, "%c", &ch)) < 0) {
if (feof(cfg->fp))
break;
rc = RC_FILE_IO_READ_ERROR;
break;
}
}
switch (cfg->state) {
case NEW_LINE:
if (ch == '\\') {
cfg->state = ESCAPE;
break;
}
if (ch == '#') { /*comment */
cfg->state = COMMENT;
break;
}
if (!isspace(ch)) {
if (ch != '-') { /*add '--' to first word in line */
if ((rc = push_in_buffer("--", 2, p_buffer, &count, maxlen)) != 0)
break;
}
if ((rc = push_in_buffer(&ch, 1, p_buffer, &count, maxlen)) != 0)
break;
cfg->state = DATA;
break;
}
/*skip actual leading spaces */
break;
case SPACE:
if (ch == '\\') {
cfg->state = ESCAPE;
break;
}
if (ch == '#') { /*comment */
cfg->state = COMMENT;
break;
}
if (ch == '\n' || ch == '\r') {
cfg->state = NEW_LINE;
break;
}
if (!isspace(ch)) {
if ((rc = push_in_buffer(&ch, 1, p_buffer, &count, maxlen)) != 0)
break;
cfg->state = DATA;
break;
}
break;
case COMMENT: /*skip comments */
if (ch == '\n' || ch == '\r')
cfg->state = NEW_LINE;
break;
case DATA:
if (ch == '\\') {
cfg->state = ESCAPE;
break;
}
if (ch == '#') {
cfg->state = COMMENT;
break;
}
if (ch == '\n' || ch == '\r') {
cfg->state = NEW_LINE;
parse_end = 1;
break;
}
if (isspace(ch)) {
cfg->state = SPACE;
parse_end = 1;
break;
}
/*actual data */
if ((rc = push_in_buffer(&ch, 1, p_buffer, &count, maxlen)) != 0)
break;
break;
case ESCAPE:
if ((rc = push_in_buffer(&ch, 1, p_buffer, &count, maxlen)) != 0)
break;
cfg->state = DATA;
break;
default:
rc = RC_CMD_PARSER_INVALID_OPTION;
break;
}
if (rc != 0)
break;
}
if (rc == 0) {
char ch = 0;
rc = push_in_buffer(&ch, 1, p_buffer, &count, maxlen);
}
return rc;
}
