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hush: improve prompt in nested {}s, remove unused in_str->promptme member

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function                                             old     new   delta
setup_string_in_str                                   29      38      +9
parse_and_run_stream                                  79      88      +9
setup_file_in_str                                     32      39      +7
parse_stream                                        2430    2422      -8
file_get                                             262     235     -27
------------------------------------------------------------------------------
(add/remove: 0/0 grow/shrink: 3/2 up/down: 25/-35)            Total: -10 bytes

Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
This commit is contained in:
Denys Vlasenko 2011-01-18 17:55:04 +01:00
parent 98c46d10ee
commit a146319173
1 changed files with 11 additions and 21 deletions
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32
shell/hush.c
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@ -445,7 +445,6 @@ typedef struct in_str {
char eof_flag; /* meaningless if ->p == NULL */
char peek_buf[2];
#if ENABLE_HUSH_INTERACTIVE
smallint promptme;
smallint promptmode; /* 0: PS1, 1: PS2 */
#endif
FILE *file;
@ -1946,22 +1945,17 @@ static int FAST_FUNC file_get(struct in_str *i)
/* need to double check i->file because we might be doing something
* more complicated by now, like sourcing or substituting. */
#if ENABLE_HUSH_INTERACTIVE
if (G_interactive_fd && i->promptme && i->file == stdin) {
if (G_interactive_fd && i->file == stdin) {
do {
get_user_input(i);
} while (!*i->p); /* need non-empty line */
i->promptmode = 1; /* PS2 */
i->promptme = 0;
goto take_cached;
}
#endif
do ch = fgetc(i->file); while (ch == '\0');
}
debug_printf("file_get: got '%c' %d\n", ch, ch);
#if ENABLE_HUSH_INTERACTIVE
if (ch == '\n')
i->promptme = 1;
#endif
return ch;
}
@ -1988,26 +1982,22 @@ static int FAST_FUNC file_peek(struct in_str *i)
static void setup_file_in_str(struct in_str *i, FILE *f)
{
memset(i, 0, sizeof(*i));
i->peek = file_peek;
i->get = file_get;
#if ENABLE_HUSH_INTERACTIVE
i->promptme = 1;
i->promptmode = 0; /* PS1 */
#endif
/* i->promptmode = 0; - PS1 (memset did it) */
i->file = f;
i->p = NULL;
/* i->p = NULL; */
}
static void setup_string_in_str(struct in_str *i, const char *s)
{
memset(i, 0, sizeof(*i));
i->peek = static_peek;
i->get = static_get;
#if ENABLE_HUSH_INTERACTIVE
i->promptme = 1;
i->promptmode = 0; /* PS1 */
#endif
/* i->promptmode = 0; - PS1 (memset did it) */
i->p = s;
i->eof_flag = 0;
/* i->eof_flag = 0; */
}
@ -4031,9 +4021,6 @@ static struct pipe *parse_stream(char **pstring,
reset: /* we come back here only on syntax errors in interactive shell */
#if ENABLE_HUSH_INTERACTIVE
input->promptmode = 0; /* PS1 */
#endif
if (MAYBE_ASSIGNMENT != 0)
dest.o_assignment = MAYBE_ASSIGNMENT;
initialize_context(&ctx);
@ -4539,7 +4526,6 @@ static struct pipe *parse_stream(char **pstring,
}
/* Discard cached input, force prompt */
input->p = NULL;
IF_HUSH_INTERACTIVE(input->promptme = 1;)
goto reset;
}
}
@ -5539,6 +5525,10 @@ static void parse_and_run_stream(struct in_str *inp, int end_trigger)
while (1) {
struct pipe *pipe_list;
#if ENABLE_HUSH_INTERACTIVE
if (end_trigger == ';')
inp->promptmode = 0; /* PS1 */
#endif
pipe_list = parse_stream(NULL, inp, end_trigger);
if (!pipe_list) { /* EOF */
if (empty)