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hush: optimize decoding of $'str' - avoid extra function call if we can

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function                                             old     new   delta
parse_stream                                        2565    2572      +7

Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
This commit is contained in:
Denys Vlasenko 2025-08-13 23:20:10 +02:00
parent f29ab91763
commit 438b92efdd
1 changed files with 4 additions and 5 deletions
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9
shell/hush.c
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@ -5125,10 +5125,11 @@ static int parse_dollar_squote(o_string *as_string, o_string *dest, struct in_st
{
int start;
int ch = i_peek_and_eat_bkslash_nl(input); /* first character after the $ */
debug_printf_parse("parse_dollar_squote entered: ch='%c'\n", ch);
if (ch != '\'')
return 0;
debug_printf_parse("parse_dollar_squote entered: ch='%c'\n", ch);
dest->has_quoted_part = 1;
start = dest->length;
@ -5537,8 +5538,6 @@ static int encode_string(o_string *as_string,
goto again;
}
if (ch == '$') {
//if (parse_dollar_squote(as_string, dest, input))
// goto again;
if (!parse_dollar(as_string, dest, input, /*quote_mask:*/ 0x80)) {
debug_printf_parse("encode_string return 0: "
"parse_dollar returned 0 (error)\n");
@ -5977,8 +5976,8 @@ static struct pipe *parse_stream(char **pstring,
o_addchr(&ctx.word, ch);
continue; /* get next char */
case '$':
if (parse_dollar_squote(&ctx.as_string, &ctx.word, input))
continue; /* get next char */
if (next == '\'' && parse_dollar_squote(&ctx.as_string, &ctx.word, input))
continue; /* ate $'...', get next char */
if (!parse_dollar(&ctx.as_string, &ctx.word, input, /*quote_mask:*/ 0)) {
debug_printf_parse("parse_stream parse error: "
"parse_dollar returned 0 (error)\n");