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https://github.com/sheumann/hush.git
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ash: shrink by folding an if check into setprompt; unindent big block
function old new delta setprompt_if - 66 +66 parseheredoc 126 124 -2 parsecmd 68 66 -2 redirect 1254 1249 -5 xxreadtoken 351 343 -8 readtoken1 3219 3204 -15 setprompt 62 - -62 ------------------------------------------------------------------------------ (add/remove: 1/1 grow/shrink: 0/5 up/down: 66/-94) Total: -28 bytes Signed-off-by: Denys Vlasenko <dvlasenk@redhat.com>
This commit is contained in:
Denys Vlasenko
parent
6040fe88f4
commit
958581a8d9
331
shell/ash.c
331
shell/ash.c
@ -2433,12 +2433,13 @@ static const char *expandstr(const char *ps);
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#endif
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static void
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setprompt(int whichprompt)
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setprompt_if(smallint do_set, int whichprompt)
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{
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const char *prompt;
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#if ENABLE_ASH_EXPAND_PRMT
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struct stackmark smark;
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#endif
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IF_ASH_EXPAND_PRMT(struct stackmark smark;)
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if (!do_set)
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return;
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needprompt = 0;
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@ -6022,9 +6023,7 @@ argstr(char *p, int flags, struct strlist *var_str_list)
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c = p[length];
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if (c) {
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if (!(c & 0x80)
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#if ENABLE_SH_MATH_SUPPORT
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|| c == CTLENDARI
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#endif
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IF_SH_MATH_SUPPORT(|| c == CTLENDARI)
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) {
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/* c == '=' || c == ':' || c == CTLENDARI */
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length++;
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@ -6107,8 +6106,7 @@ argstr(char *p, int flags, struct strlist *var_str_list)
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#endif
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}
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}
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breakloop:
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;
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breakloop: ;
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}
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static char *
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@ -11054,159 +11052,156 @@ readtoken1(int c, int syntax, char *eofmark, int striptabs)
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STARTSTACKSTR(out);
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loop:
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/* For each line, until end of word */
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{
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CHECKEND(); /* set c to PEOF if at end of here document */
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for (;;) { /* until end of line or end of word */
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CHECKSTRSPACE(4, out); /* permit 4 calls to USTPUTC */
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switch (SIT(c, syntax)) {
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case CNL: /* '\n' */
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if (syntax == BASESYNTAX)
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goto endword; /* exit outer loop */
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USTPUTC(c, out);
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g_parsefile->linno++;
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if (doprompt)
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setprompt(2);
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c = pgetc();
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goto loop; /* continue outer loop */
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case CWORD:
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USTPUTC(c, out);
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break;
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case CCTL:
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if (eofmark == NULL || dblquote)
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USTPUTC(CTLESC, out);
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CHECKEND(); /* set c to PEOF if at end of here document */
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for (;;) { /* until end of line or end of word */
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CHECKSTRSPACE(4, out); /* permit 4 calls to USTPUTC */
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switch (SIT(c, syntax)) {
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case CNL: /* '\n' */
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if (syntax == BASESYNTAX)
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goto endword; /* exit outer loop */
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USTPUTC(c, out);
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g_parsefile->linno++;
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setprompt_if(doprompt, 2);
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c = pgetc();
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goto loop; /* continue outer loop */
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case CWORD:
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USTPUTC(c, out);
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break;
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case CCTL:
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if (eofmark == NULL || dblquote)
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USTPUTC(CTLESC, out);
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#if ENABLE_ASH_BASH_COMPAT
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if (c == '\\' && bash_dollar_squote) {
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c = decode_dollar_squote();
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if (c & 0x100) {
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USTPUTC('\\', out);
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c = (unsigned char)c;
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}
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if (c == '\\' && bash_dollar_squote) {
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c = decode_dollar_squote();
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if (c & 0x100) {
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USTPUTC('\\', out);
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c = (unsigned char)c;
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}
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}
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#endif
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USTPUTC(c, out);
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break;
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case CBACK: /* backslash */
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c = pgetc_without_PEOA();
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if (c == PEOF) {
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USTPUTC(c, out);
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break;
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case CBACK: /* backslash */
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c = pgetc_without_PEOA();
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if (c == PEOF) {
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USTPUTC(CTLESC, out);
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USTPUTC('\\', out);
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pungetc();
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} else if (c == '\n') {
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setprompt_if(doprompt, 2);
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} else {
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#if ENABLE_ASH_EXPAND_PRMT
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if (c == '$' && pssyntax) {
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USTPUTC(CTLESC, out);
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USTPUTC('\\', out);
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pungetc();
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} else if (c == '\n') {
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if (doprompt)
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setprompt(2);
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} else {
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#if ENABLE_ASH_EXPAND_PRMT
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if (c == '$' && pssyntax) {
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USTPUTC(CTLESC, out);
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USTPUTC('\\', out);
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}
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}
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#endif
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/* Backslash is retained if we are in "str" and next char isn't special */
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if (dblquote
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&& c != '\\'
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&& c != '`'
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&& c != '$'
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&& (c != '"' || eofmark != NULL)
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) {
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USTPUTC(CTLESC, out);
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USTPUTC('\\', out);
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}
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if (SIT(c, SQSYNTAX) == CCTL)
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USTPUTC(CTLESC, out);
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USTPUTC(c, out);
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quotef = 1;
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}
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break;
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case CSQUOTE:
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syntax = SQSYNTAX;
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quotemark:
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if (eofmark == NULL) {
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USTPUTC(CTLQUOTEMARK, out);
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}
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break;
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case CDQUOTE:
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syntax = DQSYNTAX;
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dblquote = 1;
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goto quotemark;
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case CENDQUOTE:
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IF_ASH_BASH_COMPAT(bash_dollar_squote = 0;)
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if (eofmark != NULL && arinest == 0
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&& varnest == 0
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/* Backslash is retained if we are in "str" and next char isn't special */
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if (dblquote
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&& c != '\\'
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&& c != '`'
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&& c != '$'
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&& (c != '"' || eofmark != NULL)
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) {
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USTPUTC(c, out);
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} else {
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if (dqvarnest == 0) {
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syntax = BASESYNTAX;
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dblquote = 0;
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}
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quotef = 1;
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goto quotemark;
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}
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break;
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case CVAR: /* '$' */
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PARSESUB(); /* parse substitution */
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break;
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case CENDVAR: /* '}' */
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if (varnest > 0) {
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varnest--;
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if (dqvarnest > 0) {
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dqvarnest--;
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}
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c = CTLENDVAR;
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USTPUTC(CTLESC, out);
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USTPUTC('\\', out);
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}
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if (SIT(c, SQSYNTAX) == CCTL)
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USTPUTC(CTLESC, out);
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USTPUTC(c, out);
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break;
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#if ENABLE_SH_MATH_SUPPORT
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case CLP: /* '(' in arithmetic */
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parenlevel++;
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USTPUTC(c, out);
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break;
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case CRP: /* ')' in arithmetic */
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if (parenlevel > 0) {
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parenlevel--;
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} else {
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if (pgetc() == ')') {
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if (--arinest == 0) {
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syntax = prevsyntax;
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dblquote = (syntax == DQSYNTAX);
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c = CTLENDARI;
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}
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} else {
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/*
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* unbalanced parens
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* (don't 2nd guess - no error)
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*/
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pungetc();
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}
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}
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USTPUTC(c, out);
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break;
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#endif
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case CBQUOTE: /* '`' */
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PARSEBACKQOLD();
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break;
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case CENDFILE:
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goto endword; /* exit outer loop */
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case CIGN:
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break;
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default:
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if (varnest == 0) {
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#if ENABLE_ASH_BASH_COMPAT
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if (c == '&') {
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if (pgetc() == '>')
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c = 0x100 + '>'; /* flag &> */
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pungetc();
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}
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#endif
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goto endword; /* exit outer loop */
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}
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IF_ASH_ALIAS(if (c != PEOA))
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USTPUTC(c, out);
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quotef = 1;
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}
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c = pgetc_fast();
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} /* for (;;) */
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}
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break;
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case CSQUOTE:
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syntax = SQSYNTAX;
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quotemark:
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if (eofmark == NULL) {
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USTPUTC(CTLQUOTEMARK, out);
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}
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break;
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case CDQUOTE:
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syntax = DQSYNTAX;
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dblquote = 1;
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goto quotemark;
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case CENDQUOTE:
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IF_ASH_BASH_COMPAT(bash_dollar_squote = 0;)
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if (eofmark != NULL && arinest == 0
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&& varnest == 0
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) {
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USTPUTC(c, out);
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} else {
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if (dqvarnest == 0) {
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syntax = BASESYNTAX;
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dblquote = 0;
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}
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quotef = 1;
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goto quotemark;
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}
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break;
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case CVAR: /* '$' */
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PARSESUB(); /* parse substitution */
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break;
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case CENDVAR: /* '}' */
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if (varnest > 0) {
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varnest--;
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if (dqvarnest > 0) {
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dqvarnest--;
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}
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c = CTLENDVAR;
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}
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USTPUTC(c, out);
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break;
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#if ENABLE_SH_MATH_SUPPORT
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case CLP: /* '(' in arithmetic */
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parenlevel++;
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USTPUTC(c, out);
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break;
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case CRP: /* ')' in arithmetic */
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if (parenlevel > 0) {
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parenlevel--;
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} else {
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if (pgetc() == ')') {
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if (--arinest == 0) {
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syntax = prevsyntax;
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dblquote = (syntax == DQSYNTAX);
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c = CTLENDARI;
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}
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} else {
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/*
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* unbalanced parens
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* (don't 2nd guess - no error)
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*/
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pungetc();
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}
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}
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USTPUTC(c, out);
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break;
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#endif
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case CBQUOTE: /* '`' */
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PARSEBACKQOLD();
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break;
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case CENDFILE:
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goto endword; /* exit outer loop */
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case CIGN:
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break;
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default:
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if (varnest == 0) {
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#if ENABLE_ASH_BASH_COMPAT
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if (c == '&') {
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if (pgetc() == '>')
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c = 0x100 + '>'; /* flag &> */
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pungetc();
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}
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#endif
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goto endword; /* exit outer loop */
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}
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IF_ASH_ALIAS(if (c != PEOA))
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USTPUTC(c, out);
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}
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c = pgetc_fast();
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} /* for (;;) */
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endword:
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#if ENABLE_SH_MATH_SUPPORT
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if (syntax == ARISYNTAX)
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raise_error_syntax("missing '))'");
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@ -11542,16 +11537,14 @@ parsebackq: {
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treatment to some slashes, and then push the string and
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reread it as input, interpreting it normally. */
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char *pout;
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int pc;
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size_t psavelen;
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char *pstr;
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STARTSTACKSTR(pout);
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for (;;) {
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if (needprompt) {
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setprompt(2);
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}
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int pc;
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setprompt_if(needprompt, 2);
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pc = pgetc();
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switch (pc) {
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case '`':
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@ -11561,8 +11554,7 @@ parsebackq: {
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pc = pgetc();
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if (pc == '\n') {
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g_parsefile->linno++;
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if (doprompt)
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setprompt(2);
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setprompt_if(doprompt, 2);
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/*
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* If eating a newline, avoid putting
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* the newline into the new character
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@ -11725,9 +11717,7 @@ xxreadtoken(void)
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tokpushback = 0;
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return lasttoken;
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}
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if (needprompt) {
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setprompt(2);
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}
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setprompt_if(needprompt, 2);
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startlinno = g_parsefile->linno;
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for (;;) { /* until token or start of word found */
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c = pgetc_fast();
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@ -11744,8 +11734,7 @@ xxreadtoken(void)
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break; /* return readtoken1(...) */
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}
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startlinno = ++g_parsefile->linno;
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if (doprompt)
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setprompt(2);
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setprompt_if(doprompt, 2);
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} else {
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const char *p;
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@ -11791,9 +11780,7 @@ xxreadtoken(void)
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tokpushback = 0;
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return lasttoken;
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}
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if (needprompt) {
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setprompt(2);
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}
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setprompt_if(needprompt, 2);
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startlinno = g_parsefile->linno;
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for (;;) { /* until token or start of word found */
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c = pgetc_fast();
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@ -11809,8 +11796,7 @@ xxreadtoken(void)
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case '\\':
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if (pgetc() == '\n') {
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startlinno = ++g_parsefile->linno;
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if (doprompt)
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setprompt(2);
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setprompt_if(doprompt, 2);
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continue;
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}
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pungetc();
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@ -11936,8 +11922,7 @@ parsecmd(int interact)
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tokpushback = 0;
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doprompt = interact;
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if (doprompt)
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setprompt(doprompt);
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setprompt_if(doprompt, doprompt);
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needprompt = 0;
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t = readtoken();
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if (t == TEOF)
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@ -11961,10 +11946,8 @@ parseheredoc(void)
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heredoclist = NULL;
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while (here) {
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if (needprompt) {
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setprompt(2);
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}
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readtoken1(pgetc(), here->here->type == NHERE? SQSYNTAX : DQSYNTAX,
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setprompt_if(needprompt, 2);
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readtoken1(pgetc(), here->here->type == NHERE ? SQSYNTAX : DQSYNTAX,
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here->eofmark, here->striptabs);
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n = stzalloc(sizeof(struct narg));
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n->narg.type = NARG;
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