accept_t lexer_read_command(struct lexer_book *bk)
{
if(lexer_next_peek(bk) != '\t')
return NO;
int count = 0;
lexer_discard_white_space(bk);
struct token *t;
do {
t = lexer_read_command_argument(bk);
if(!t)
break;
if(t->type == NEWLINE && count == 0) {
lexer_report_error(bk, "Missing command line.\n");
} else if(t->type != NEWLINE && count == 0) {
/* Add command start marker */
lexer_push_token(bk, lexer_pack_token(bk, COMMAND));
}
lexer_push_token(bk, t);
count++;
} while(t->type != NEWLINE);
if(count > 1)
return YES;
else {
return NO;
}
}
struct list *lexer_read_command_aux(struct lexer *lx)
{
int spaces_deleted = lexer_discard_white_space(lx);
struct list *tokens = list_create();
//Preserve space in substitutions.
if(spaces_deleted && lx->depth > 0) {
list_push_tail(tokens, lexer_pack_token(lx, TOKEN_SPACE));
}
/* Read all command tokens. Note that we read from lx, but put in lx_c. */
while(1) {
struct token *t = lexer_read_command_argument(lx);
if(!t)
break;
if(t->type == TOKEN_SUBSTITUTION) {
tokens = list_splice(tokens, lexer_expand_substitution(lx, t, lexer_read_command_aux));
lexer_free_token(t);
continue;
} else {
list_push_tail(tokens, t);
if(t->type==TOKEN_NEWLINE) break;
}
}
return tokens;
}
void lexer_append_all_tokens(struct lexer_book *bk, struct lexer_book *bk_s)
{
struct token *head_s;
bk_s->substitution_mode = bk->substitution_mode;
while( !bk_s->eof )
{
if(lexer_next_peek(bk_s) == CHAR_EOF)
{
/* Found end of string while completing command */
bk_s->lexeme_end++;
bk_s->eof = 1;
}
else
{
switch(bk_s->substitution_mode)
{
case CHAR_EOF:
case COMMAND:
head_s = lexer_read_command_argument(bk_s);
break;
case FILES:
head_s = lexer_read_file(bk_s);
break;
case SYNTAX:
lexer_read_expandable(bk_s, CHAR_EOF);
head_s = lexer_pack_token(bk_s, LITERAL);
break;
default:
lexer_read_line(bk_s);
continue;
break;
}
if(head_s)
lexer_push_token(bk_s, head_s);
}
}
while( (head_s = list_pop_tail(bk_s->token_queue)) != NULL )
list_push_head(bk->token_queue, head_s);
}
