Exemplo n.º 1
0
Arquivo: lex.c Projeto: AMDmi3/zsh
static int
isnumglob(void)
{
    int c, ec = '-', ret = 0;
    int tbs = 256, n = 0;
    char *tbuf = (char *)zalloc(tbs);

    while(1) {
	c = hgetc();
	if(lexstop) {
	    lexstop = 0;
	    break;
	}
	tbuf[n++] = c;
	if(!idigit(c)) {
	    if(c != ec)
		break;
	    if(ec == '>') {
		ret = 1;
		break;
	    }
	    ec = '>';
	}
	if(n == tbs)
	    tbuf = (char *)realloc(tbuf, tbs *= 2);
    }
    while(n--)
	hungetc(tbuf[n]);
    zfree(tbuf, tbs);
    return ret;
}
Exemplo n.º 2
0
static int
cmd_or_math(int cs_type)
{
    int oldlen = len;
    int c;

    cmdpush(cs_type);
    c = dquote_parse(')', 0);
    cmdpop();
    *bptr = '\0';
    if (!c) {
	c = hgetc();
	if (c == ')')
	    return 1;
	hungetc(c);
	lexstop = 0;
	c = ')';
    }
    hungetc(c);
    lexstop = 0;
    while (len > oldlen) {
	len--;
	hungetc(itok(*--bptr) ? ztokens[*bptr - Pound] : *bptr);
    }
    hungetc('(');
    return 0;
}
Exemplo n.º 3
0
Arquivo: lex.c Projeto: xtaran/pkg-zsh
static int
cmd_or_math(int cs_type)
{
    int oldlen = len;
    int c;

    cmdpush(cs_type);
    c = dquote_parse(')', 0);
    cmdpop();
    *bptr = '\0';
    if (!c) {
	/* Successfully parsed, see if it was math */
	c = hgetc();
	if (c == ')')
	    return 1; /* yes */
	hungetc(c);
	lexstop = 0;
	c = ')';
    } else if (lexstop) {
	/* we haven't got anything to unget */
	return 2;
    }
    /* else unsuccessful: unget the whole thing */
    hungetc(c);
    lexstop = 0;
    while (len > oldlen) {
	len--;
	hungetc(itok(*--bptr) ? ztokens[*bptr - Pound] : *bptr);
    }
    hungetc('(');
    return 0;
}
Exemplo n.º 4
0
Arquivo: lex.c Projeto: AMDmi3/zsh
static int
checkalias(void)
{
    Alias an;

    if (!zshlextext)
	return 0;

    if (!noaliases && isset(ALIASESOPT) &&
	(!isset(POSIXALIASES) ||
	 (tok == STRING && !reswdtab->getnode(reswdtab, zshlextext)))) {
	char *suf;

	an = (Alias) aliastab->getnode(aliastab, zshlextext);
	if (an && !an->inuse &&
	    ((an->node.flags & ALIAS_GLOBAL) ||
	     (incmdpos && tok == STRING) || inalmore)) {
	    if (!lexstop) {
		/*
		 * Tokens that don't require a space after, get one,
		 * because they are treated as if preceded by one.
		 */
		int c = hgetc();
		hungetc(c);
		if (!iblank(c))
		    inpush(" ", INP_ALIAS, 0);
	    }
	    inpush(an->text, INP_ALIAS, an);
	    if (an->text[0] == ' ' && !(an->node.flags & ALIAS_GLOBAL))
		aliasspaceflag = 1;
	    lexstop = 0;
	    return 1;
	}
	if ((suf = strrchr(zshlextext, '.')) && suf[1] &&
	    suf > zshlextext && suf[-1] != Meta &&
	    (an = (Alias)sufaliastab->getnode(sufaliastab, suf+1)) &&
	    !an->inuse && incmdpos) {
	    inpush(dupstring(zshlextext), INP_ALIAS, NULL);
	    inpush(" ", INP_ALIAS, NULL);
	    inpush(an->text, INP_ALIAS, an);
	    lexstop = 0;
	    return 1;
	}
    }

    return 0;
}
Exemplo n.º 5
0
DLL_EXPORT char * hgets(char *b,size_t c,int s)
{
    size_t ix=0;
    while(ix<c)
    {
        b[ix]=hgetc(s);
        if(b[ix]==EOF)
        {
            return NULL;
        }
        b[ix+1]=0;
        if(b[ix]=='\n')
        {
            return(b);
        }
        ix++;
    }
    return NULL;
}
Exemplo n.º 6
0
static int
cmd_or_math_sub(void)
{
    int c = hgetc();

    if (c == '(') {
	add(Inpar);
	add('(');
	if (cmd_or_math(CS_MATHSUBST)) {
	    add(')');
	    return 0;
	}
	bptr -= 2;
	len -= 2;
    } else {
	hungetc(c);
	lexstop = 0;
    }
    return skipcomm();
}
Exemplo n.º 7
0
Arquivo: lex.c Projeto: AMDmi3/zsh
static int
cmd_or_math(int cs_type)
{
    int oldlen = lexbuf.len;
    int c;
    int oinflags = inbufflags;

    cmdpush(cs_type);
    inbufflags |= INP_APPEND;
    c = dquote_parse(')', 0);
    if (!(oinflags & INP_APPEND))
	inbufflags &= ~INP_APPEND;
    cmdpop();
    *lexbuf.ptr = '\0';
    if (!c) {
	/* Successfully parsed, see if it was math */
	c = hgetc();
	if (c == ')')
	    return CMD_OR_MATH_MATH; /* yes */
	hungetc(c);
	lexstop = 0;
	c = ')';
    } else if (lexstop) {
	/* we haven't got anything to unget */
	return CMD_OR_MATH_ERR;
    }
    /* else unsuccessful: unget the whole thing */
    hungetc(c);
    lexstop = 0;
    while (lexbuf.len > oldlen && !(errflag & ERRFLAG_ERROR)) {
	lexbuf.len--;
	hungetc(itok(*--lexbuf.ptr) ?
		ztokens[*lexbuf.ptr - Pound] : *lexbuf.ptr);
    }
    if (errflag)
	return CMD_OR_MATH_ERR;
    hungetc('(');
    return errflag ? CMD_OR_MATH_ERR : CMD_OR_MATH_CMD;
}
Exemplo n.º 8
0
mod_export int
parse_subst_string(char *s)
{
    int c, l = strlen(s), err, olen, lexstop_ret;

    if (!*s || !strcmp(s, nulstring))
	return 0;
    lexsave();
    untokenize(s);
    inpush(dupstring(s), 0, NULL);
    strinbeg(0);
    len = 0;
    bptr = tokstr = s;
    bsiz = l + 1;
    c = hgetc();
    lexstop_ret = lexstop;
    c = gettokstr(c, 1);
    err = errflag;
    strinend();
    inpop();
    DPUTS(cmdsp, "BUG: parse_subst_string: cmdstack not empty.");
    olen = len;
    lexrestore();
    errflag = err;
    if (c == LEXERR) {
	untokenize(s);
	return 1;
    }
#ifdef DEBUG
    if (c != STRING || olen != l || errflag) {
	fprintf(stderr, "Oops. Bug in parse_subst_string: %s\n",
		olen < l ? "len < l" : errflag ? "errflag" : "c != STRING");
	fflush(stderr);
	untokenize(s);
	return 1;
    }
#endif
    return 0;
}
Exemplo n.º 9
0
Arquivo: lex.c Projeto: AMDmi3/zsh
/*
 * Parse either a $(( ... )) or a $(...)
 * Return the same as cmd_or_math().
 */
static int
cmd_or_math_sub(void)
{
    int c = hgetc(), ret;

    if (c == '(') {
	int lexpos = (int)(lexbuf.ptr - tokstr);
	add(Inpar);
	add('(');
	if ((ret = cmd_or_math(CS_MATHSUBST)) == CMD_OR_MATH_MATH) {
	    tokstr[lexpos] = Inparmath;
	    add(')');
	    return CMD_OR_MATH_MATH;
	}
	if (ret == CMD_OR_MATH_ERR)
	    return CMD_OR_MATH_ERR;
	lexbuf.ptr -= 2;
	lexbuf.len -= 2;
    } else {
	hungetc(c);
	lexstop = 0;
    }
    return skipcomm() ? CMD_OR_MATH_ERR : CMD_OR_MATH_CMD;
}
Exemplo n.º 10
0
Arquivo: lex.c Projeto: AMDmi3/zsh
static int
skipcomm(void)
{
#ifdef ZSH_OLD_SKIPCOMM
    int pct = 1, c, start = 1;

    cmdpush(CS_CMDSUBST);
    SETPARBEGIN
    c = Inpar;
    do {
	int iswhite;
	add(c);
	c = hgetc();
	if (itok(c) || lexstop)
	    break;
	iswhite = inblank(c);
	switch (c) {
	case '(':
	    pct++;
	    break;
	case ')':
	    pct--;
	    break;
	case '\\':
	    add(c);
	    c = hgetc();
	    break;
	case '\'': {
	    int strquote = lexbuf.ptr[-1] == '$';
	    add(c);
	    STOPHIST
	    while ((c = hgetc()) != '\'' && !lexstop) {
		if (c == '\\' && strquote) {
		    add(c);
		    c = hgetc();
		}
		add(c);
	    }
	    ALLOWHIST
	    break;
	}
	case '\"':
	    add(c);
	    while ((c = hgetc()) != '\"' && !lexstop)
		if (c == '\\') {
		    add(c);
		    add(hgetc());
		} else
		    add(c);
	    break;
	case '`':
	    add(c);
	    while ((c = hgetc()) != '`' && !lexstop)
		if (c == '\\')
		    add(c), add(hgetc());
		else
		    add(c);
	    break;
	case '#':
	    if (start) {
		add(c);
		while ((c = hgetc()) != '\n' && !lexstop)
		    add(c);
		iswhite = 1;
	    }
	    break;
	}
	start = iswhite;
    }
    while (pct);
    if (!lexstop)
	SETPAREND
    cmdpop();
    return lexstop;
#else
    char *new_tokstr;
    int new_lexstop, new_lex_add_raw;
    int save_infor = infor;
    struct lexbufstate new_lexbuf;
    int noalias = noaliases;

    noaliases = 1;
    infor = 0;
    cmdpush(CS_CMDSUBST);
    SETPARBEGIN
    add(Inpar);

    new_lex_add_raw = lex_add_raw + 1;
    if (!lex_add_raw) {
	/*
	 * We'll combine the string so far with the input
	 * read in for the command substitution.  To do this
	 * we'll just propagate the current tokstr etc. as the
	 * variables used for adding raw input, and
	 * ensure we swap those for the real tokstr etc. at the end.
	 *
	 * However, we need to save and restore the rest of the
	 * lexical and parse state as we're effectively parsing
	 * an internal string.  Because we're still parsing it from
	 * the original input source (we have to --- we don't know
	 * when to stop inputting it otherwise and can't rely on
	 * the input being recoverable until we've read it) we need
	 * to keep the same history context.
	 */
	new_tokstr = tokstr;
	new_lexbuf = lexbuf;

	/*
	 * If we're expanding an alias at this point, we need the whole
	 * remaining text as part of the string for the command in
	 * parentheses, so don't backtrack.  This is different from the
	 * usual case where the alias is fully within the command, where
	 * we want the unexpanded text so that it will be expanded
	 * again when the command in the parentheses is executed.
	 *
	 * I never wanted to be a software engineer, you know.
	 */
	if (inbufflags & INP_ALIAS)
	    inbufflags |= INP_RAW_KEEP;
	zcontext_save_partial(ZCONTEXT_LEX|ZCONTEXT_PARSE);
	hist_in_word(1);
    } else {
	/*
	 * Set up for nested command subsitution, however
	 * we don't actually need the string until we get
	 * back to the top level and recover the lot.
	 * The $() body just appears empty.
	 *
	 * We do need to propagate the raw variables which would
	 * otherwise by cleared, though.
	 */
	new_tokstr = tokstr_raw;
	new_lexbuf = lexbuf_raw;

	zcontext_save_partial(ZCONTEXT_LEX|ZCONTEXT_PARSE);
    }
    tokstr_raw = new_tokstr;
    lexbuf_raw = new_lexbuf;
    lex_add_raw = new_lex_add_raw;
    /*
     * Don't do any ZLE specials down here: they're only needed
     * when we return the string from the recursive parse.
     * (TBD: this probably means we should be initialising lexflags
     * more consistently.)
     *
     * Note that in that case we're still using the ZLE line reading
     * function at the history layer --- this is consistent with the
     * intention of maintaining the history and input layers across
     * the recursive parsing.
     */
    lexflags &= ~LEXFLAGS_ZLE;
    dbparens = 0;	/* restored by zcontext_restore_partial() */

    if (!parse_event(OUTPAR) || tok != OUTPAR)
	lexstop = 1;
     /* Outpar lexical token gets added in caller if present */

    /*
     * We're going to keep the full raw input string
     * as the current token string after popping the stack.
     */
    new_tokstr = tokstr_raw;
    new_lexbuf = lexbuf_raw;
    /*
     * We're also going to propagate the lexical state:
     * if we couldn't parse the command substitution we
     * can't continue.
     */
    new_lexstop = lexstop;

    zcontext_restore_partial(ZCONTEXT_LEX|ZCONTEXT_PARSE);

    if (lex_add_raw) {
	/*
	 * Keep going, so retain the raw variables.
	 */
	tokstr_raw = new_tokstr;
	lexbuf_raw = new_lexbuf;
    } else {
	if (!new_lexstop) {
	    /* Ignore the ')' added on input */
	    new_lexbuf.len--;
	    *--new_lexbuf.ptr = '\0';
	}

	/*
	 * Convince the rest of lex.c we were examining a string
	 * all along.
	 */
	tokstr = new_tokstr;
	lexbuf = new_lexbuf;
	lexstop = new_lexstop;
	hist_in_word(0);
    }

    if (!lexstop)
	SETPAREND
    cmdpop();
    infor = save_infor;
    noaliases = noalias;

    return lexstop;
#endif
}
Exemplo n.º 11
0
static void *http_request(void* arg)
{
    WEBBLK *webblk;
    int authok = !http_serv.httpauth;
    char line[HTTP_PATH_LENGTH];
    char *url = NULL;
    char *pointer;
    char *strtok_str = NULL;
    CGITAB *cgient;
    int content_length = 0;
    int sock = (int) (uintptr_t) arg;

    if(!(webblk = malloc(sizeof(WEBBLK))))
        http_exit(webblk);

    memset(webblk,0,sizeof(WEBBLK));
    webblk->sock = sock;

    while (hgets(line, sizeof(line), webblk->sock))
    {
        if (*line == '\r' || *line == '\n')
            break;

        if((pointer = strtok_r(line," \t\r\n",&strtok_str)))
        {
            if(!strcasecmp(pointer,"GET"))
            {
                if((pointer = strtok_r(NULL," \t\r\n",&strtok_str)))
                {
                    webblk->request_type = REQTYPE_GET;
                    url = strdup(pointer);
                }
            }
            else
            if(!strcasecmp(pointer,"POST"))
            {
                if((pointer = strtok_r(NULL," \t\r\n",&strtok_str)))
                {
                    webblk->request_type = REQTYPE_POST;
                    url = strdup(pointer);
                }
            }
            else
            if(!strcasecmp(pointer,"PUT"))
            {
                http_error(webblk,"400 Bad Request", "",
                                  "This server does not accept PUT requests");
            }
            else
            if(!strcasecmp(pointer,"Authorization:"))
            {
                if((pointer = strtok_r(NULL," \t\r\n",&strtok_str)))
                    authok = http_authenticate(webblk,pointer,
                                  strtok_r(NULL," \t\r\n",&strtok_str));
            }
            else
            if(!strcasecmp(pointer,"Cookie:"))
            {
                if((pointer = strtok_r(NULL,"\r\n",&strtok_str)))
                    http_interpret_variable_string(webblk, pointer, VARTYPE_COOKIE);
            }
            else
            if(!strcasecmp(pointer,"Content-Length:"))
            {
                if((pointer = strtok_r(NULL," \t\r\n",&strtok_str)))
                    content_length = atoi(pointer);
            }
        }
    }
    webblk->request = url;

    if(webblk->request_type == REQTYPE_POST
      && content_length != 0)
    {
    char *post_arg;
        if((pointer = post_arg = malloc(content_length + 1)))
        {
        int i;
            for(i = 0; i < content_length; i++)
            {
                *pointer = hgetc(webblk->sock);
                if(*pointer != '\n' && *pointer != '\r')
                    pointer++;
            }
            *pointer = '\0';
            http_interpret_variable_string(webblk, post_arg, VARTYPE_POST);
            free(post_arg);
        }
    }

    if (!authok)
    {
        http_error(webblk, "401 Authorization Required",
                           "WWW-Authenticate: Basic realm=\"HERCULES\"\n",
                           "You must be authenticated to use this service");
    }

    if (!url)
    {
        http_error(webblk,"400 Bad Request", "",
                          "You must specify a GET or POST request");
    }

    /* anything following a ? in the URL is part of the get arguments */
    if ((pointer=strchr(url,'?'))) {
        *pointer++ = 0;
        http_interpret_variable_string(webblk, pointer, VARTYPE_GET);
    }

    while(url[0] == '/' && url[1] == '/')
        url++;

    webblk->baseurl = url;

    if(!strcasecmp("/",url))
        url = HTTP_WELCOME;

    if(strncasecmp("/cgi-bin/",url,9))
        http_download(webblk,url);
    else
        url += 9;

    while(*url == '/')
        url++;

#if 0
    http_dump_cgi_variables(webblk);
#endif

    for(cgient = cgidir; cgient->path; cgient++)
    {
        if(!strcmp(cgient->path, url))
        {
        char tbuf[80];
            hprintf(webblk->sock,"HTTP/1.0 200 OK\nConnection: close\n");
            hprintf(webblk->sock,"Date: %s\n",
              http_timestring(tbuf,sizeof(tbuf),time(NULL)));
            (cgient->cgibin) (webblk);
            http_exit(webblk);
        }
    }

#if defined(OPTION_DYNAMIC_LOAD)
    {
    zz_cgibin dyncgi;

        if( (dyncgi = HDL_FINDSYM(webblk->baseurl)) )
        {
        char tbuf[80];
            hprintf(webblk->sock,"HTTP/1.0 200 OK\nConnection: close\n");
            hprintf(webblk->sock,"Date: %s\n",
              http_timestring(tbuf,sizeof(tbuf),time(NULL)));
            dyncgi(webblk);
            http_exit(webblk);
        }
    }
#endif /*defined(OPTION_DYNAMIC_LOAD)*/

    http_error(webblk, "404 File Not Found","",
                       "The requested file was not found");
    return NULL;
}
Exemplo n.º 12
0
static int
gettokstr(int c, int sub)
{
    int bct = 0, pct = 0, brct = 0, fdpar = 0;
    int intpos = 1, in_brace_param = 0;
    int peek, inquote, unmatched = 0;
    char endchar='"';
#ifdef DEBUG
    int ocmdsp = cmdsp;
#endif

    peek = STRING;
    if (!sub) {
	len = 0;
	bptr = tokstr = (char *) hcalloc(bsiz = 32);
    }
    for (;;) {
	int act;
	int e;
	int inbl = inblank(c);
	
	if (fdpar && !inbl && c != ')')
	    fdpar = 0;

	if (inbl && !in_brace_param && !pct)
	    act = LX2_BREAK;
	else {
	    act = lexact2[STOUC(c)];
	    c = lextok2[STOUC(c)];
	}
	switch (act) {
	case LX2_BREAK:
	    if (!in_brace_param && !sub)
		goto brk;
	    break;
	case LX2_META:
	    c = hgetc();
#ifdef DEBUG
	    if (lexstop) {
		fputs("BUG: input terminated by Meta\n", stderr);
		fflush(stderr);
		goto brk;
	    }
#endif
	    add(Meta);
	    break;
	case LX2_OUTPAR:
	    if (fdpar) {
		/* this is a single word `(   )', treat as INOUTPAR */
		add(c);
		*bptr = '\0';
		return INOUTPAR;
	    }
	    if ((sub || in_brace_param) && isset(SHGLOB))
		break;
	    if (!in_brace_param && !pct--) {
		if (sub) {
		    pct = 0;
		    break;
		} else
		    goto brk;
	    }
	    c = Outpar;
	    break;
	case LX2_BAR:
	    if (!pct && !in_brace_param) {
		if (sub)
		    break;
		else
		    goto brk;
	    }
	    if (unset(SHGLOB) || (!sub && !in_brace_param))
		c = Bar;
	    break;
	case LX2_STRING:
	    e = hgetc();
	    if (e == '[') {
		cmdpush(CS_MATHSUBST);
		add(String);
		add(Inbrack);
		c = dquote_parse(']', sub);
		cmdpop();
		if (c) {
		    peek = LEXERR;
		    goto brk;
		}
		c = Outbrack;
	    } else if (e == '(') {
		add(String);
		c = cmd_or_math_sub();
		if (c) {
		    peek = LEXERR;
		    goto brk;
		}
		c = Outpar;
	    } else {
		if (e == '{') {
		    add(c);
		    c = Inbrace;
		    ++bct;
		    cmdpush(CS_BRACEPAR);
		    if (!in_brace_param)
			in_brace_param = bct;
		} else {
		    hungetc(e);
		    lexstop = 0;
		}
	    }
	    break;
	case LX2_INBRACK:
	    if (!in_brace_param)
		brct++;
	    c = Inbrack;
	    break;
	case LX2_OUTBRACK:
	    if (!in_brace_param)
		brct--;
	    if (brct < 0)
		brct = 0;
	    c = Outbrack;
	    break;
	case LX2_INPAR:
	    if (isset(SHGLOB)) {
		if (sub || in_brace_param)
		    break;
		if (incasepat && !len)
		    return INPAR;
	    }
	    if (!in_brace_param) {
		if (!sub) {
		    e = hgetc();
		    hungetc(e);
		    lexstop = 0;
		    /* For command words, parentheses are only
		     * special at the start.  But now we're tokenising
		     * the remaining string.  So I don't see what
		     * the old incmdpos test here is for.
		     *   pws 1999/6/8
		     *
		     * Oh, no.
		     *  func1(   )
		     * is a valid function definition in [k]sh.  The best
		     * thing we can do, without really nasty lookahead tricks,
		     * is break if we find a blank after a parenthesis.  At
		     * least this can't happen inside braces or brackets.  We
		     * only allow this with SHGLOB (set for both sh and ksh).
		     *
		     * Things like `print @( |foo)' should still
		     * work, because [k]sh don't allow multiple words
		     * in a function definition, so we only do this
		     * in command position.
		     *   pws 1999/6/14
		     */
		    if (e == ')' || (isset(SHGLOB) && inblank(e) && !bct &&
				     !brct && !intpos && incmdpos))
			goto brk;
		}
		/*
		 * This also handles the [k]sh `foo( )' function definition.
		 * Maintain a variable fdpar, set as long as a single set of
		 * parentheses contains only space.  Then if we get to the
		 * closing parenthesis and it is still set, we can assume we
		 * have a function definition.  Only do this at the start of
		 * the word, since the (...) must be a separate token.
		 */
		if (!pct++ && isset(SHGLOB) && intpos && !bct && !brct)
		    fdpar = 1;
	    }
	    c = Inpar;
	    break;
	case LX2_INBRACE:
	    if (isset(IGNOREBRACES) || sub)
		c = '{';
	    else {
		if (!len && incmdpos) {
		    add('{');
		    *bptr = '\0';
		    return STRING;
		}
		if (in_brace_param) {
		    cmdpush(CS_BRACE);
		}
		bct++;
	    }
	    break;
	case LX2_OUTBRACE:
	    if ((isset(IGNOREBRACES) || sub) && !in_brace_param)
		break;
	    if (!bct)
		break;
	    if (in_brace_param) {
		cmdpop();
	    }
	    if (bct-- == in_brace_param)
		in_brace_param = 0;
	    c = Outbrace;
	    break;
	case LX2_COMMA:
	    if (unset(IGNOREBRACES) && !sub && bct > in_brace_param)
		c = Comma;
	    break;
	case LX2_OUTANG:
	    if (!intpos) {
		if (in_brace_param || sub)
		    break;
		else
		    goto brk;
	    }
	    e = hgetc();
	    if (e != '(') {
		hungetc(e);
		lexstop = 0;
		goto brk;
	    }
	    add(Outang);
	    if (skipcomm()) {
		peek = LEXERR;
		goto brk;
	    }
	    c = Outpar;
	    break;
	case LX2_INANG:
	    if (isset(SHGLOB) && sub)
		break;
	    e = hgetc();
	    if(e == '(' && intpos) {
		add(Inang);
		if (skipcomm()) {
		    peek = LEXERR;
		    goto brk;
		}
		c = Outpar;
		break;
	    }
	    hungetc(e);
	    if(isnumglob()) {
		add(Inang);
		while ((c = hgetc()) != '>')
		    add(c);
		c = Outang;
		break;
	    }
	    lexstop = 0;
	    if (in_brace_param || sub)
		break;
	    goto brk;
	case LX2_EQUALS:
	    if (intpos) {
		e = hgetc();
		if (e != '(') {
		    hungetc(e);
		    lexstop = 0;
		    c = Equals;
		} else {
		    add(Equals);
		    if (skipcomm()) {
			peek = LEXERR;
			goto brk;
		    }
		    c = Outpar;
		}
	    } else if (!sub && peek != ENVSTRING &&
		       incmdpos && !bct && !brct) {
		char *t = tokstr;
		if (idigit(*t))
		    while (++t < bptr && idigit(*t));
		else {
		    while (iident(*t) && ++t < bptr);
		    if (t < bptr) {
			*bptr = '\0';
			skipparens(Inbrack, Outbrack, &t);
		    }
		}
		if (*t == '+')
                    t++;
		if (t == bptr) {
		    e = hgetc();
		    if (e == '(' && incmdpos) {
			*bptr = '\0';
			return ENVARRAY;
		    }
		    hungetc(e);
		    lexstop = 0;
		    peek = ENVSTRING;
		    intpos = 2;
		} else
		    c = Equals;
	    } else
		c = Equals;
	    break;
#ifndef __SYMBIAN32__	    
	case LX2_BKSLASH:
	    c = hgetc();
	    if (c == '\n') {
		c = hgetc();
		if (!lexstop)
		    continue;
	    } else
		add(Bnull);
	    if (lexstop)
		goto brk;
	    break;
#endif	    
	case LX2_QUOTE: {
	    int strquote = (len && bptr[-1] == String);

	    add(Snull);
	    cmdpush(CS_QUOTE);
	    for (;;) {
		STOPHIST
		while ((c = hgetc()) != '\'' && !lexstop) {
		    if (strquote && c == '\\') {
			add(c);
			c = hgetc();
			if (lexstop)
			    break;
		    } else if (!sub && isset(CSHJUNKIEQUOTES) && c == '\n') {
			if (bptr[-1] == '\\')
			    bptr--, len--;
			else
			    break;
		    }
		    add(c);
		}
		ALLOWHIST
		if (c != '\'') {
		    unmatched = '\'';
		    peek = LEXERR;
		    cmdpop();
		    goto brk;
		}
		e = hgetc();
		if (e != '\'' || unset(RCQUOTES) || strquote)
		    break;
		add(c);
	    }
	    cmdpop();
	    hungetc(e);
	    lexstop = 0;
	    c = Snull;
	    break;
	}
	case LX2_DQUOTE:
	    add(Dnull);
	    cmdpush(CS_DQUOTE);
	    c = dquote_parse('"', sub);
	    cmdpop();
	    if (c) {
		unmatched = '"';
		peek = LEXERR;
		goto brk;
	    }
	    c = Dnull;
	    break;
	case LX2_BQUOTE:
	    add(Tick);
	    cmdpush(CS_BQUOTE);
	    SETPARBEGIN
	    inquote = 0;
	    while ((c = hgetc()) != '`' && !lexstop) {
		if (c == '\\') {
		    c = hgetc();
		    if (c != '\n') {
			add(c == '`' || c == '\\' || c == '$' ? Bnull : '\\');
			add(c);
		    }
		    else if (!sub && isset(CSHJUNKIEQUOTES))
			add(c);
		} else {
		    if (!sub && isset(CSHJUNKIEQUOTES) && c == '\n') {
			break;
		    }
		    add(c);
		    if (c == '\'') {
			if ((inquote = !inquote))
			    STOPHIST
			else
			    ALLOWHIST
		    }
		}
	    }
	    if (inquote)
		ALLOWHIST
	    cmdpop();
	    if (c != '`') {
		unmatched = '`';
		peek = LEXERR;
		goto brk;
	    }
	    c = Tick;
	    SETPAREND
	    break;
	}
	#ifdef __SYMBIAN32__	
	if(c=='\\') 
		{
	    c = hgetc();
	    if (c != '\n') {
		if (c == endchar)
		    add(Bnull);
		else {
		    /* lexstop is implicitly handled here */
		    add('\\');
		    
		}
	    } 
	}
	#endif
	add(c);
	c = hgetc();
	if (intpos)
	    intpos--;
	if (lexstop)
	    break;
    }
  brk:
    hungetc(c);
    if (unmatched)
	zerr("unmatched %c", NULL, unmatched);
    if (in_brace_param) {
	while(bct-- >= in_brace_param)
	    cmdpop();
	zerr("closing brace expected", NULL, 0);
    } else if (unset(IGNOREBRACES) && !sub && len > 1 &&
	       peek == STRING && bptr[-1] == '}' && bptr[-2] != Bnull) {
	/* hack to get {foo} command syntax work */
	bptr--;
	len--;
	lexstop = 0;
	hungetc('}');
    }
    *bptr = '\0';
    DPUTS(cmdsp != ocmdsp, "BUG: gettok: cmdstack changed.");
    return peek;
}
Exemplo n.º 13
0
int
gettok(void)
{
    int c, d;
    int peekfd = -1, peek;

  beginning:
    tokstr = NULL;
    while (iblank(c = hgetc()) && !lexstop);
    if (lexstop)
	return (errflag) ? LEXERR : ENDINPUT;
    isfirstln = 0;
    wordbeg = inbufct - (qbang && c == bangchar);
    hwbegin(-1-(qbang && c == bangchar));
    /* word includes the last character read and possibly \ before ! */
    if (dbparens) {
	len = 0;
	bptr = tokstr = (char *) hcalloc(bsiz = 32);
	hungetc(c);
	cmdpush(CS_MATH);
	c = dquote_parse(infor ? ';' : ')', 0);
	cmdpop();
	*bptr = '\0';
	if (!c && infor) {
	    infor--;
	    return DINPAR;
	}
	if (c || (c = hgetc()) != ')') {
	    hungetc(c);
	    return LEXERR;
	}
	dbparens = 0;
	return DOUTPAR;
    } else if (idigit(c)) {	/* handle 1< foo */
	d = hgetc();
	if(d == '&') {
	    d = hgetc();
	    if(d == '>') {
		peekfd = c - '0';
		hungetc('>');
		c = '&';
	    } else {
		hungetc(d);
		lexstop = 0;
		hungetc('&');
	    }
	} else if (d == '>' || d == '<') {
	    peekfd = c - '0';
	    c = d;
	} else {
	    hungetc(d);
	    lexstop = 0;
	}
    }

    /* chars in initial position in word */

    if (c == hashchar && !nocomments &&
	(isset(INTERACTIVECOMMENTS) ||
	 (!zleparse && !expanding &&
	  (!interact || unset(SHINSTDIN) || strin)))) {
	/* History is handled here to prevent extra  *
	 * newlines being inserted into the history. */

	while ((c = ingetc()) != '\n' && !lexstop) {
	    hwaddc(c);
	    addtoline(c);
	}

	if (errflag)
	    peek = LEXERR;
	else {
	    hwend();
	    hwbegin(0);
	    hwaddc('\n');
	    addtoline('\n');
	    peek = NEWLIN;
	}
	return peek;
    }
    switch (lexact1[STOUC(c)]) {
    case LX1_BKSLASH:
	d = hgetc();
	if (d == '\n')
	    goto beginning;
	hungetc(d);
	lexstop = 0;
	break;
    case LX1_NEWLIN:
	return NEWLIN;
    case LX1_SEMI:
	d = hgetc();
	if(d == ';')
	    return DSEMI;
	else if(d == '&')
	    return SEMIAMP;
	hungetc(d);
	lexstop = 0;
	return SEMI;
    case LX1_AMPER:
	d = hgetc();
	if (d == '&')
	    return DAMPER;
	else if (d == '!' || d == '|')
	    return AMPERBANG;
	else if (d == '>') {
	    tokfd = peekfd;
	    d = hgetc();
	    if (d == '!' || d == '|')
		return OUTANGAMPBANG;
	    else if (d == '>') {
		d = hgetc();
		if (d == '!' || d == '|')
		    return DOUTANGAMPBANG;
		hungetc(d);
		lexstop = 0;
		return DOUTANGAMP;
	    }
	    hungetc(d);
	    lexstop = 0;
	    return AMPOUTANG;
	}
	hungetc(d);
	lexstop = 0;
	return AMPER;
    case LX1_BAR:
	d = hgetc();
	if (d == '|')
	    return DBAR;
	else if (d == '&')
	    return BARAMP;
	hungetc(d);
	lexstop = 0;
	return BAR;
    case LX1_INPAR:
	d = hgetc();
	if (d == '(') {
	    if (infor) {
		dbparens = 1;
		return DINPAR;
	    }
	    if (incmdpos) {
		len = 0;
		bptr = tokstr = (char *) hcalloc(bsiz = 32);
		return cmd_or_math(CS_MATH) ? DINPAR : INPAR;
	    }
	} else if (d == ')')
	    return INOUTPAR;
	hungetc(d);
	lexstop = 0;
	if (!(incond == 1 || incmdpos))
	    break;
	return INPAR;
    case LX1_OUTPAR:
	return OUTPAR;
    case LX1_INANG:
	d = hgetc();
	if (!incmdpos && d == '(') {
	    hungetc(d);
	    lexstop = 0;
	    unpeekfd:
	    if(peekfd != -1) {
		hungetc(c);
		c = '0' + peekfd;
	    }
	    break;
	}
	if (d == '>') {
	    peek = INOUTANG;
	} else if (d == '<') {
	    int e = hgetc();

	    if (e == '(') {
		hungetc(e);
		hungetc(d);
		peek = INANG;
	    } else if (e == '<')
		peek = TRINANG;
	    else if (e == '-')
		peek = DINANGDASH;
	    else {
		hungetc(e);
		lexstop = 0;
		peek = DINANG;
	    }
	} else if (d == '&') {
	    peek = INANGAMP;
	} else {
	    hungetc(d);
	    if(isnumglob())
		goto unpeekfd;
	    peek = INANG;
	}
	tokfd = peekfd;
	return peek;
    case LX1_OUTANG:
	d = hgetc();
	if (d == '(') {
	    hungetc(d);
	    goto unpeekfd;
	} else if (d == '&') {
	    d = hgetc();
	    if (d == '!' || d == '|')
		peek = OUTANGAMPBANG;
	    else {
		hungetc(d);
		lexstop = 0;
		peek = OUTANGAMP;
	    }
	} else if (d == '!' || d == '|')
	    peek = OUTANGBANG;
	else if (d == '>') {
	    d = hgetc();
	    if (d == '&') {
		d = hgetc();
		if (d == '!' || d == '|')
		    peek = DOUTANGAMPBANG;
		else {
		    hungetc(d);
		    lexstop = 0;
		    peek = DOUTANGAMP;
		}
	    } else if (d == '!' || d == '|')
		peek = DOUTANGBANG;
	    else if (d == '(') {
		hungetc(d);
		hungetc('>');
		peek = OUTANG;
	    } else {
		hungetc(d);
		lexstop = 0;
		peek = DOUTANG;
		if (isset(HISTALLOWCLOBBER))
		    hwaddc('|');
	    }
	} else {
	    hungetc(d);
	    lexstop = 0;
	    peek = OUTANG;
	    if (!incond && isset(HISTALLOWCLOBBER))
		hwaddc('|');
	}
	tokfd = peekfd;
	return peek;
    }

    /* we've started a string, now get the *
     * rest of it, performing tokenization */
    return gettokstr(c, 0);
}
Exemplo n.º 14
0
static int
skipcomm(void)
{
    int pct = 1, c;

    cmdpush(CS_CMDSUBST);
    SETPARBEGIN
    c = Inpar;
    do {
	add(c);
	c = hgetc();
	if (itok(c) || lexstop)
	    break;
	switch (c) {
	case '(':
	    pct++;
	    break;
	case ')':
	    pct--;
	    break;
	case '\\':
	    add(c);
	    c = hgetc();
	    break;
	case '\'': {
	    int strquote = bptr[-1] == '$';
	    add(c);
	    STOPHIST
	    while ((c = hgetc()) != '\'' && !lexstop) {
		if (c == '\\' && strquote) {
		    add(c);
		    c = hgetc();
		}
		add(c);
	    }
	    ALLOWHIST
	    break;
	}
	case '\"':
	    add(c);
	    while ((c = hgetc()) != '\"' && !lexstop)
		if (c == '\\') {
		    add(c);
		    add(hgetc());
		} else
		    add(c);
	    break;
	case '`':
	    add(c);
	    while ((c = hgetc()) != '`' && !lexstop)
		if (c == '\\')
		    add(c), add(hgetc());
		else
		    add(c);
	    break;
	}
    }
    while (pct);
    if (!lexstop)
	SETPAREND
    cmdpop();
    return lexstop;
}
Exemplo n.º 15
0
static int
dquote_parse(char endchar, int sub)
{
    int pct = 0, brct = 0, bct = 0, intick = 0, err = 0;
    int c;
    int math = endchar == ')' || endchar == ']';
    int zlemath = math && cs > ll + addedx - inbufct;

    while (((c = hgetc()) != endchar || bct ||
	    (math && ((pct > 0) || (brct > 0))) ||
	    intick) && !lexstop) {
      cont:
	switch (c) {
	case '\\':
	    c = hgetc();
	    if (c != '\n') {
		if (c == '$' || c == '\\' || (c == '}' && !intick && bct) ||
		    c == endchar || c == '`' ||
		    (endchar == ']' && (c == '[' || c == ']' ||
					c == '(' || c == ')' ||
					c == '{' || c == '}' ||
					(c == '"' && sub))))
		    add(Bnull);
		else {
		    /* lexstop is implicitly handled here */
		    add('\\');
		    goto cont;
		}
	    } else if (sub || unset(CSHJUNKIEQUOTES) || endchar != '"')
		continue;
	    break;
	case '\n':
	    err = !sub && isset(CSHJUNKIEQUOTES) && endchar == '"';
	    break;
	case '$':
	    if (intick)
		break;
	    c = hgetc();
	    if (c == '(') {
		add(Qstring);
		err = cmd_or_math_sub();
		c = Outpar;
	    } else if (c == '[') {
		add(String);
		add(Inbrack);
		cmdpush(CS_MATHSUBST);
		err = dquote_parse(']', sub);
		cmdpop();
		c = Outbrack;
	    } else if (c == '{') {
		add(Qstring);
		c = Inbrace;
		cmdpush(CS_BRACEPAR);
		bct++;
	    } else if (c == '$')
		add(Qstring);
	    else {
		hungetc(c);
		lexstop = 0;
		c = Qstring;
	    }
	    break;
	case '}':
	    if (intick || !bct)
		break;
	    c = Outbrace;
	    bct--;
	    cmdpop();
	    break;
	case '`':
	    c = Qtick;
	    if (intick == 2)
		ALLOWHIST
	    if ((intick = !intick)) {
		SETPARBEGIN
		cmdpush(CS_BQUOTE);
	    } else {
		SETPAREND
	        cmdpop();
	    }
	    break;
	case '\'':
	    if (!intick)
		break;
	    if (intick == 1)
		intick = 2, STOPHIST
	    else
		intick = 1, ALLOWHIST
	    break;
	case '(':
	    if (!math || !bct)
		pct++;
	    break;
	case ')':
	    if (!math || !bct)
		err = (!pct-- && math);
	    break;
	case '[':
	    if (!math || !bct)
		brct++;
	    break;
	case ']':
	    if (!math || !bct)
		err = (!brct-- && math);
	    break;
	case '"':
	    if (intick || ((endchar == ']' || !endchar) && !bct))
		break;
	    if (bct) {
		add(Dnull);
		cmdpush(CS_DQUOTE);
		err = dquote_parse('"', sub);
		cmdpop();
		c = Dnull;
	    } else
		err = 1;
	    break;
	}
	if (err || lexstop)
	    break;
	add(c);
    }
    if (intick == 2)
	ALLOWHIST
    if (intick) {
	cmdpop();
    }
    while (bct--)
	cmdpop();
    if (lexstop)
	err = intick || endchar || err;
    else if (err == 1)
	err = c;
    if (zlemath && cs <= ll + 1 - inbufct)
	inwhat = IN_MATH;
    return err;
}
Exemplo n.º 16
0
Arquivo: lex.c Projeto: AMDmi3/zsh
static enum lextok
gettok(void)
{
    int c, d;
    int peekfd = -1;
    enum lextok peek;

  beginning:
    tokstr = NULL;
    while (iblank(c = hgetc()) && !lexstop);
    toklineno = lineno;
    if (lexstop)
	return (errflag) ? LEXERR : ENDINPUT;
    isfirstln = 0;
    if ((lexflags & LEXFLAGS_ZLE))
	wordbeg = inbufct - (qbang && c == bangchar);
    hwbegin(-1-(qbang && c == bangchar));
    /* word includes the last character read and possibly \ before ! */
    if (dbparens) {
	lexbuf.len = 0;
	lexbuf.ptr = tokstr = (char *) hcalloc(lexbuf.siz = LEX_HEAP_SIZE);
	hungetc(c);
	cmdpush(CS_MATH);
	c = dquote_parse(infor ? ';' : ')', 0);
	cmdpop();
	*lexbuf.ptr = '\0';
	if (!c && infor) {
	    infor--;
	    return DINPAR;
	}
	if (c || (c = hgetc()) != ')') {
	    hungetc(c);
	    return LEXERR;
	}
	dbparens = 0;
	return DOUTPAR;
    } else if (idigit(c)) {	/* handle 1< foo */
	d = hgetc();
	if(d == '&') {
	    d = hgetc();
	    if(d == '>') {
		peekfd = c - '0';
		hungetc('>');
		c = '&';
	    } else {
		hungetc(d);
		lexstop = 0;
		hungetc('&');
	    }
	} else if (d == '>' || d == '<') {
	    peekfd = c - '0';
	    c = d;
	} else {
	    hungetc(d);
	    lexstop = 0;
	}
    }

    /* chars in initial position in word */

    /*
     * Handle comments.  There are some special cases when this
     * is not normal command input: lexflags implies we are examining
     * a line lexically without it being used for normal command input.
     */
    if (c == hashchar && !nocomments &&
	(isset(INTERACTIVECOMMENTS) ||
	 ((!lexflags || (lexflags & LEXFLAGS_COMMENTS)) && !expanding &&
	  (!interact || unset(SHINSTDIN) || strin)))) {
	/* History is handled here to prevent extra  *
	 * newlines being inserted into the history. */

	if (lexflags & LEXFLAGS_COMMENTS_KEEP) {
	    lexbuf.len = 0;
	    lexbuf.ptr = tokstr =
		(char *)hcalloc(lexbuf.siz = LEX_HEAP_SIZE);
	    add(c);
	}
	hwend();
	while ((c = ingetc()) != '\n' && !lexstop) {
	    hwaddc(c);
	    addtoline(c);
	    if (lexflags & LEXFLAGS_COMMENTS_KEEP)
		add(c);
	}

	if (errflag)
	    peek = LEXERR;
	else {
	    if (lexflags & LEXFLAGS_COMMENTS_KEEP) {
		*lexbuf.ptr = '\0';
		if (!lexstop)
		    hungetc(c);
		peek = STRING;
	    } else {
		hwend();
		hwbegin(0);
		hwaddc('\n');
		addtoline('\n');
		/*
		 * If splitting a line and removing comments,
		 * we don't want a newline token since it's
		 * treated specially.
		 */
		if ((lexflags & LEXFLAGS_COMMENTS_STRIP) && lexstop)
		    peek = ENDINPUT;
		else
		    peek = NEWLIN;
	    }
	}
	return peek;
    }
    switch (lexact1[STOUC(c)]) {
    case LX1_BKSLASH:
	d = hgetc();
	if (d == '\n')
	    goto beginning;
	hungetc(d);
	lexstop = 0;
	break;
    case LX1_NEWLIN:
	return NEWLIN;
    case LX1_SEMI:
	d = hgetc();
	if(d == ';')
	    return DSEMI;
	else if(d == '&')
	    return SEMIAMP;
	else if (d == '|')
	    return SEMIBAR;
	hungetc(d);
	lexstop = 0;
	return SEMI;
    case LX1_AMPER:
	d = hgetc();
	if (d == '&')
	    return DAMPER;
	else if (d == '!' || d == '|')
	    return AMPERBANG;
	else if (d == '>') {
	    tokfd = peekfd;
	    d = hgetc();
	    if (d == '!' || d == '|')
		return OUTANGAMPBANG;
	    else if (d == '>') {
		d = hgetc();
		if (d == '!' || d == '|')
		    return DOUTANGAMPBANG;
		hungetc(d);
		lexstop = 0;
		return DOUTANGAMP;
	    }
	    hungetc(d);
	    lexstop = 0;
	    return AMPOUTANG;
	}
	hungetc(d);
	lexstop = 0;
	return AMPER;
    case LX1_BAR:
	d = hgetc();
	if (d == '|')
	    return DBAR;
	else if (d == '&')
	    return BARAMP;
	hungetc(d);
	lexstop = 0;
	return BAR;
    case LX1_INPAR:
	d = hgetc();
	if (d == '(') {
	    if (infor) {
		dbparens = 1;
		return DINPAR;
	    }
	    if (incmdpos || (isset(SHGLOB) && !isset(KSHGLOB))) {
		lexbuf.len = 0;
		lexbuf.ptr = tokstr = (char *)
		    hcalloc(lexbuf.siz = LEX_HEAP_SIZE);
		switch (cmd_or_math(CS_MATH)) {
		case CMD_OR_MATH_MATH:
		    return DINPAR;

		case CMD_OR_MATH_CMD:
		    /*
		     * Not math, so we don't return the contents
		     * as a string in this case.
		     */
		    tokstr = NULL;
		    return INPAR;
		    
		case CMD_OR_MATH_ERR:
		    /*
		     * LEXFLAGS_ACTIVE means we came from bufferwords(),
		     * so we treat as an incomplete math expression
		     */
		    if (lexflags & LEXFLAGS_ACTIVE)
			tokstr = dyncat("((", tokstr ? tokstr : "");
		    /* fall through */

		default:
		    return LEXERR;
		}
	    }
	} else if (d == ')')
	    return INOUTPAR;
	hungetc(d);
	lexstop = 0;
	if (!(isset(SHGLOB) || incond == 1 || incmdpos))
	    break;
	return INPAR;
    case LX1_OUTPAR:
	return OUTPAR;
    case LX1_INANG:
	d = hgetc();
	if (d == '(') {
	    hungetc(d);
	    lexstop = 0;
	    unpeekfd:
	    if(peekfd != -1) {
		hungetc(c);
		c = '0' + peekfd;
	    }
	    break;
	}
	if (d == '>') {
	    peek = INOUTANG;
	} else if (d == '<') {
	    int e = hgetc();

	    if (e == '(') {
		hungetc(e);
		hungetc(d);
		peek = INANG;
	    } else if (e == '<')
		peek = TRINANG;
	    else if (e == '-')
		peek = DINANGDASH;
	    else {
		hungetc(e);
		lexstop = 0;
		peek = DINANG;
	    }
	} else if (d == '&') {
	    peek = INANGAMP;
	} else {
	    hungetc(d);
	    if(isnumglob())
		goto unpeekfd;
	    peek = INANG;
	}
	tokfd = peekfd;
	return peek;
    case LX1_OUTANG:
	d = hgetc();
	if (d == '(') {
	    hungetc(d);
	    goto unpeekfd;
	} else if (d == '&') {
	    d = hgetc();
	    if (d == '!' || d == '|')
		peek = OUTANGAMPBANG;
	    else {
		hungetc(d);
		lexstop = 0;
		peek = OUTANGAMP;
	    }
	} else if (d == '!' || d == '|')
	    peek = OUTANGBANG;
	else if (d == '>') {
	    d = hgetc();
	    if (d == '&') {
		d = hgetc();
		if (d == '!' || d == '|')
		    peek = DOUTANGAMPBANG;
		else {
		    hungetc(d);
		    lexstop = 0;
		    peek = DOUTANGAMP;
		}
	    } else if (d == '!' || d == '|')
		peek = DOUTANGBANG;
	    else if (d == '(') {
		hungetc(d);
		hungetc('>');
		peek = OUTANG;
	    } else {
		hungetc(d);
		lexstop = 0;
		peek = DOUTANG;
		if (isset(HISTALLOWCLOBBER))
		    hwaddc('|');
	    }
	} else {
	    hungetc(d);
	    lexstop = 0;
	    peek = OUTANG;
	    if (!incond && isset(HISTALLOWCLOBBER))
		hwaddc('|');
	}
	tokfd = peekfd;
	return peek;
    }

    /* we've started a string, now get the *
     * rest of it, performing tokenization */
    return gettokstr(c, 0);
}
Exemplo n.º 17
0
Arquivo: lex.c Projeto: AMDmi3/zsh
static enum lextok
gettokstr(int c, int sub)
{
    int bct = 0, pct = 0, brct = 0, seen_brct = 0, fdpar = 0;
    int intpos = 1, in_brace_param = 0;
    int inquote, unmatched = 0;
    enum lextok peek;
#ifdef DEBUG
    int ocmdsp = cmdsp;
#endif

    peek = STRING;
    if (!sub) {
	lexbuf.len = 0;
	lexbuf.ptr = tokstr = (char *) hcalloc(lexbuf.siz = LEX_HEAP_SIZE);
    }
    for (;;) {
	int act;
	int e;
	int inbl = inblank(c);
	
	if (fdpar && !inbl && c != ')')
	    fdpar = 0;

	if (inbl && !in_brace_param && !pct)
	    act = LX2_BREAK;
	else {
	    act = lexact2[STOUC(c)];
	    c = lextok2[STOUC(c)];
	}
	switch (act) {
	case LX2_BREAK:
	    if (!in_brace_param && !sub)
		goto brk;
	    break;
	case LX2_META:
	    c = hgetc();
#ifdef DEBUG
	    if (lexstop) {
		fputs("BUG: input terminated by Meta\n", stderr);
		fflush(stderr);
		goto brk;
	    }
#endif
	    add(Meta);
	    break;
	case LX2_OUTPAR:
	    if (fdpar) {
		/* this is a single word `(   )', treat as INOUTPAR */
		add(c);
		*lexbuf.ptr = '\0';
		return INOUTPAR;
	    }
	    if ((sub || in_brace_param) && isset(SHGLOB))
		break;
	    if (!in_brace_param && !pct--) {
		if (sub) {
		    pct = 0;
		    break;
		} else
		    goto brk;
	    }
	    c = Outpar;
	    break;
	case LX2_BAR:
	    if (!pct && !in_brace_param) {
		if (sub)
		    break;
		else
		    goto brk;
	    }
	    if (unset(SHGLOB) || (!sub && !in_brace_param))
		c = Bar;
	    break;
	case LX2_STRING:
	    e = hgetc();
	    if (e == '[') {
		cmdpush(CS_MATHSUBST);
		add(String);
		add(Inbrack);
		c = dquote_parse(']', sub);
		cmdpop();
		if (c) {
		    peek = LEXERR;
		    goto brk;
		}
		c = Outbrack;
	    } else if (e == '(') {
		add(String);
		switch (cmd_or_math_sub()) {
		case CMD_OR_MATH_CMD:
		    c = Outpar;
		    break;

		case CMD_OR_MATH_MATH:
		    c = Outparmath;
		    break;

		default:
		    peek = LEXERR;
		    goto brk;
		}
	    } else {
		if (e == '{') {
		    add(c);
		    c = Inbrace;
		    ++bct;
		    cmdpush(CS_BRACEPAR);
		    if (!in_brace_param) {
			if ((in_brace_param = bct))
			    seen_brct = 0;
		    }
		} else {
		    hungetc(e);
		    lexstop = 0;
		}
	    }
	    break;
	case LX2_INBRACK:
	    if (!in_brace_param) {
		brct++;
		seen_brct = 1;
	    }
	    c = Inbrack;
	    break;
	case LX2_OUTBRACK:
	    if (!in_brace_param)
		brct--;
	    if (brct < 0)
		brct = 0;
	    c = Outbrack;
	    break;
	case LX2_INPAR:
	    if (isset(SHGLOB)) {
		if (sub || in_brace_param)
		    break;
		if (incasepat && !lexbuf.len)
		    return INPAR;
		if (!isset(KSHGLOB) && lexbuf.len)
		    goto brk;
	    }
	    if (!in_brace_param) {
		if (!sub) {
		    e = hgetc();
		    hungetc(e);
		    lexstop = 0;
		    /* For command words, parentheses are only
		     * special at the start.  But now we're tokenising
		     * the remaining string.  So I don't see what
		     * the old incmdpos test here is for.
		     *   pws 1999/6/8
		     *
		     * Oh, no.
		     *  func1(   )
		     * is a valid function definition in [k]sh.  The best
		     * thing we can do, without really nasty lookahead tricks,
		     * is break if we find a blank after a parenthesis.  At
		     * least this can't happen inside braces or brackets.  We
		     * only allow this with SHGLOB (set for both sh and ksh).
		     *
		     * Things like `print @( |foo)' should still
		     * work, because [k]sh don't allow multiple words
		     * in a function definition, so we only do this
		     * in command position.
		     *   pws 1999/6/14
		     */
		    if (e == ')' || (isset(SHGLOB) && inblank(e) && !bct &&
				     !brct && !intpos && incmdpos)) {
			/*
			 * Either a () token, or a command word with
			 * something suspiciously like a ksh function
			 * definition.
			 * The current word isn't spellcheckable.
			 */
			nocorrect |= 2;
			goto brk;
		    }
		}
		/*
		 * This also handles the [k]sh `foo( )' function definition.
		 * Maintain a variable fdpar, set as long as a single set of
		 * parentheses contains only space.  Then if we get to the
		 * closing parenthesis and it is still set, we can assume we
		 * have a function definition.  Only do this at the start of
		 * the word, since the (...) must be a separate token.
		 */
		if (!pct++ && isset(SHGLOB) && intpos && !bct && !brct)
		    fdpar = 1;
	    }
	    c = Inpar;
	    break;
	case LX2_INBRACE:
	    if (isset(IGNOREBRACES) || sub)
		c = '{';
	    else {
		if (!lexbuf.len && incmdpos) {
		    add('{');
		    *lexbuf.ptr = '\0';
		    return STRING;
		}
		if (in_brace_param) {
		    cmdpush(CS_BRACE);
		}
		bct++;
	    }
	    break;
	case LX2_OUTBRACE:
	    if ((isset(IGNOREBRACES) || sub) && !in_brace_param)
		break;
	    if (!bct)
		break;
	    if (in_brace_param) {
		cmdpop();
	    }
	    if (bct-- == in_brace_param)
		in_brace_param = 0;
	    c = Outbrace;
	    break;
	case LX2_COMMA:
	    if (unset(IGNOREBRACES) && !sub && bct > in_brace_param)
		c = Comma;
	    break;
	case LX2_OUTANG:
	    if (in_brace_param || sub)
		break;
	    e = hgetc();
	    if (e != '(') {
		hungetc(e);
		lexstop = 0;
		goto brk;
	    }
	    add(OutangProc);
	    if (skipcomm()) {
		peek = LEXERR;
		goto brk;
	    }
	    c = Outpar;
	    break;
	case LX2_INANG:
	    if (isset(SHGLOB) && sub)
		break;
	    e = hgetc();
	    if (!(in_brace_param || sub) && e == '(') {
		add(Inang);
		if (skipcomm()) {
		    peek = LEXERR;
		    goto brk;
		}
		c = Outpar;
		break;
	    }
	    hungetc(e);
	    if(isnumglob()) {
		add(Inang);
		while ((c = hgetc()) != '>')
		    add(c);
		c = Outang;
		break;
	    }
	    lexstop = 0;
	    if (in_brace_param || sub)
		break;
	    goto brk;
	case LX2_EQUALS:
	    if (!sub) {
		if (intpos) {
		    e = hgetc();
		    if (e != '(') {
			hungetc(e);
			lexstop = 0;
			c = Equals;
		    } else {
			add(Equals);
			if (skipcomm()) {
			    peek = LEXERR;
			    goto brk;
			}
			c = Outpar;
		    }
		} else if (peek != ENVSTRING &&
			   (incmdpos || intypeset) && !bct && !brct) {
		    char *t = tokstr;
		    if (idigit(*t))
			while (++t < lexbuf.ptr && idigit(*t));
		    else {
			int sav = *lexbuf.ptr;
			*lexbuf.ptr = '\0';
			t = itype_end(t, IIDENT, 0);
			if (t < lexbuf.ptr) {
			    skipparens(Inbrack, Outbrack, &t);
			} else {
			    *lexbuf.ptr = sav;
			}
		    }
		    if (*t == '+')
			t++;
		    if (t == lexbuf.ptr) {
			e = hgetc();
			if (e == '(') {
			    *lexbuf.ptr = '\0';
			    return ENVARRAY;
			}
			hungetc(e);
			lexstop = 0;
			peek = ENVSTRING;
			intpos = 2;
		    } else
			c = Equals;
		} else
		    c = Equals;
	    }
	    break;
	case LX2_BKSLASH:
	    c = hgetc();
	    if (c == '\n') {
		c = hgetc();
		if (!lexstop)
		    continue;
	    } else {
		add(Bnull);
		if (c == STOUC(Meta)) {
		    c = hgetc();
#ifdef DEBUG
		    if (lexstop) {
			fputs("BUG: input terminated by Meta\n", stderr);
			fflush(stderr);
			goto brk;
		    }
#endif
		    add(Meta);
		}
	    }
	    if (lexstop)
		goto brk;
	    break;
	case LX2_QUOTE: {
	    int strquote = (lexbuf.len && lexbuf.ptr[-1] == String);

	    add(Snull);
	    cmdpush(CS_QUOTE);
	    for (;;) {
		STOPHIST
		while ((c = hgetc()) != '\'' && !lexstop) {
		    if (strquote && c == '\\') {
			c = hgetc();
			if (lexstop)
			    break;
			/*
			 * Mostly we don't need to do anything special
			 * with escape backslashes or closing quotes
			 * inside $'...'; however in completion we
			 * need to be able to strip multiple backslashes
			 * neatly.
			 */
			if (c == '\\' || c == '\'')
			    add(Bnull);
			else
			    add('\\');
		    } else if (!sub && isset(CSHJUNKIEQUOTES) && c == '\n') {
			if (lexbuf.ptr[-1] == '\\')
			    lexbuf.ptr--, lexbuf.len--;
			else
			    break;
		    }
		    add(c);
		}
		ALLOWHIST
		if (c != '\'') {
		    unmatched = '\'';
		    peek = LEXERR;
		    cmdpop();
		    goto brk;
		}
		e = hgetc();
		if (e != '\'' || unset(RCQUOTES) || strquote)
		    break;
		add(c);
	    }
	    cmdpop();
	    hungetc(e);
	    lexstop = 0;
	    c = Snull;
	    break;
	}
	case LX2_DQUOTE:
	    add(Dnull);
	    cmdpush(CS_DQUOTE);
	    c = dquote_parse('"', sub);
	    cmdpop();
	    if (c) {
		unmatched = '"';
		peek = LEXERR;
		goto brk;
	    }
	    c = Dnull;
	    break;
	case LX2_BQUOTE:
	    add(Tick);
	    cmdpush(CS_BQUOTE);
	    SETPARBEGIN
	    inquote = 0;
	    while ((c = hgetc()) != '`' && !lexstop) {
		if (c == '\\') {
		    c = hgetc();
		    if (c != '\n') {
			add(c == '`' || c == '\\' || c == '$' ? Bnull : '\\');
			add(c);
		    }
		    else if (!sub && isset(CSHJUNKIEQUOTES))
			add(c);
		} else {
		    if (!sub && isset(CSHJUNKIEQUOTES) && c == '\n') {
			break;
		    }
		    add(c);
		    if (c == '\'') {
			if ((inquote = !inquote))
			    STOPHIST
			else
			    ALLOWHIST
		    }
		}
	    }
	    if (inquote)
		ALLOWHIST
	    cmdpop();
	    if (c != '`') {
		unmatched = '`';
		peek = LEXERR;
		goto brk;
	    }
	    c = Tick;
	    SETPAREND
	    break;
	case LX2_DASH:
	    /*
	     * - shouldn't be treated as a special character unless
	     * we're in a pattern.  Howeve,simply  counting "[" doesn't
	     * work as []a-z] is a valid expression and we don't know
	     * down here what this "[" is for as $foo[stuff] is valid
	     * in zsh.  So just detect an opening [, which is enough
	     * to turn this into a pattern; the Dash will be harmlessly
	     * untokenised if not wanted.
	     */
	    if (seen_brct)
		c = Dash;
           else
               c = '-';
           break;
       case LX2_BANG:
           /*
            * Same logic as Dash, for ! to perform negation in range.
            */
           if (seen_brct)
               c = Bang;
           else
               c = '!';
       }
       add(c);
       c = hgetc();
	if (intpos)
	    intpos--;
	if (lexstop)
	    break;
    }
  brk:
    if (errflag) {
	if (in_brace_param) {
	    while(bct-- >= in_brace_param)
		cmdpop();
	}
	return LEXERR;
    }
    hungetc(c);
    if (unmatched)
	zerr("unmatched %c", unmatched);
    if (in_brace_param) {
	while(bct-- >= in_brace_param)
	    cmdpop();
	zerr("closing brace expected");
    } else if (unset(IGNOREBRACES) && !sub && lexbuf.len > 1 &&
	       peek == STRING && lexbuf.ptr[-1] == '}' &&
	       lexbuf.ptr[-2] != Bnull) {
	/* hack to get {foo} command syntax work */
	lexbuf.ptr--;
	lexbuf.len--;
	lexstop = 0;
	hungetc('}');
    }
    *lexbuf.ptr = '\0';
    DPUTS(cmdsp != ocmdsp, "BUG: gettok: cmdstack changed.");
    return peek;
}
Exemplo n.º 18
0
Arquivo: lex.c Projeto: AMDmi3/zsh
static int
dquote_parse(char endchar, int sub)
{
    int pct = 0, brct = 0, bct = 0, intick = 0, err = 0;
    int c;
    int math = endchar == ')' || endchar == ']' || infor;
    int zlemath = math && zlemetacs > zlemetall + addedx - inbufct;

    while (((c = hgetc()) != endchar || bct ||
	    (math && ((pct > 0) || (brct > 0))) ||
	    intick) && !lexstop) {
      cont:
	switch (c) {
	case '\\':
	    c = hgetc();
	    if (c != '\n') {
		if (c == '$' || c == '\\' || (c == '}' && !intick && bct) ||
		    c == endchar || c == '`' ||
		    (endchar == ']' && (c == '[' || c == ']' ||
					c == '(' || c == ')' ||
					c == '{' || c == '}' ||
					(c == '"' && sub))))
		    add(Bnull);
		else {
		    /* lexstop is implicitly handled here */
		    add('\\');
		    goto cont;
		}
	    } else if (sub || unset(CSHJUNKIEQUOTES) || endchar != '"')
		continue;
	    break;
	case '\n':
	    err = !sub && isset(CSHJUNKIEQUOTES) && endchar == '"';
	    break;
	case '$':
	    if (intick)
		break;
	    c = hgetc();
	    if (c == '(') {
		add(Qstring);
		switch (cmd_or_math_sub()) {
		case CMD_OR_MATH_CMD:
		    c = Outpar;
		    break;

		case CMD_OR_MATH_MATH:
		    c = Outparmath;
		    break;

		default:
		    err = 1;
		    break;
		}
	    } else if (c == '[') {
		add(String);
		add(Inbrack);
		cmdpush(CS_MATHSUBST);
		err = dquote_parse(']', sub);
		cmdpop();
		c = Outbrack;
	    } else if (c == '{') {
		add(Qstring);
		c = Inbrace;
		cmdpush(CS_BRACEPAR);
		bct++;
	    } else if (c == '$')
		add(Qstring);
	    else {
		hungetc(c);
		lexstop = 0;
		c = Qstring;
	    }
	    break;
	case '}':
	    if (intick || !bct)
		break;
	    c = Outbrace;
	    bct--;
	    cmdpop();
	    break;
	case '`':
	    c = Qtick;
	    if (intick == 2)
		ALLOWHIST
	    if ((intick = !intick)) {
		SETPARBEGIN
		cmdpush(CS_BQUOTE);
	    } else {
		SETPAREND
	        cmdpop();
	    }
	    break;
	case '\'':
	    if (!intick)
		break;
	    if (intick == 1)
		intick = 2, STOPHIST
	    else
		intick = 1, ALLOWHIST
	    break;
	case '(':
	    if (!math || !bct)
		pct++;
	    break;
	case ')':
	    if (!math || !bct)
		err = (!pct-- && math);
	    break;
	case '[':
	    if (!math || !bct)
		brct++;
	    break;
	case ']':
	    if (!math || !bct)
		err = (!brct-- && math);
	    break;
	case '"':
	    if (intick || (endchar != '"' && !bct))
		break;
	    if (bct) {
		add(Dnull);
		cmdpush(CS_DQUOTE);
		err = dquote_parse('"', sub);
		cmdpop();
		c = Dnull;
	    } else
		err = 1;
	    break;
	}
	if (err || lexstop)
	    break;
	add(c);
    }
    if (intick == 2)
	ALLOWHIST
    if (intick) {
	cmdpop();
    }
    while (bct--)
	cmdpop();
    if (lexstop)
	err = intick || endchar || err;
    else if (err == 1) {
	/*
	 * TODO: as far as I can see, this hack is used in gettokstr()
	 * to hungetc() a character on an error.  However, I don't
	 * understand what that actually gets us, and we can't guarantee
	 * it's a character anyway, because of the previous test.
	 *
	 * We use the same feature in cmd_or_math where we actually do
	 * need to unget if we decide it's really a command substitution.
	 * We try to handle the other case by testing for lexstop.
	 */
	err = c;
    }
    if (zlemath && zlemetacs <= zlemetall + 1 - inbufct)
	inwhat = IN_MATH;
    return err;
}
Exemplo n.º 19
0
int main(void)
{
    static const int size[] = { 1, 13, 403, 999, 30000 };

    char buffer[40000];
    char *original;
    int c, i;
    ssize_t n;
    off_t off;

    reopen("vcf.c", "test/hfile1.tmp");
    while ((c = hgetc(fin)) != EOF) {
        if (hputc(c, fout) == EOF) fail("hputc");
    }
    if (herrno(fin)) { errno = herrno(fin); fail("hgetc"); }

    reopen("test/hfile1.tmp", "test/hfile2.tmp");
    if (hpeek(fin, buffer, 50) < 0) fail("hpeek");
    while ((n = hread(fin, buffer, 17)) > 0) {
        if (hwrite(fout, buffer, n) != n) fail("hwrite");
    }
    if (n < 0) fail("hread");

    reopen("test/hfile2.tmp", "test/hfile3.tmp");
    while ((n = hread(fin, buffer, sizeof buffer)) > 0) {
        if (hwrite(fout, buffer, n) != n) fail("hwrite");
        if (hpeek(fin, buffer, 700) < 0) fail("hpeek");
    }
    if (n < 0) fail("hread");

    reopen("test/hfile3.tmp", "test/hfile4.tmp");
    i = 0;
    off = 0;
    while ((n = hread(fin, buffer, size[i++ % 5])) > 0) {
        off += n;
        buffer[n] = '\0';
        check_offset(fin, off, "pre-peek");
        if (hputs(buffer, fout) == EOF) fail("hputs");
        if ((n = hpeek(fin, buffer, size[(i+3) % 5])) < 0) fail("hpeek");
        check_offset(fin, off, "post-peek");
    }
    if (n < 0) fail("hread");

    reopen("test/hfile4.tmp", "test/hfile5.tmp");
    n = hread(fin, buffer, 200);
    if (n < 0) fail("hread");
    else if (n != 200) fail("hread only got %d", (int)n);
    if (hwrite(fout, buffer, 1000) != 1000) fail("hwrite");
    check_offset(fin, 200, "input/first200");
    check_offset(fout, 1000, "output/first200");

    if (hseek(fin, 800, SEEK_CUR) < 0) fail("hseek/cur");
    check_offset(fin, 1000, "input/seek");
    for (off = 1000; (n = hread(fin, buffer, sizeof buffer)) > 0; off += n)
        if (hwrite(fout, buffer, n) != n) fail("hwrite");
    if (n < 0) fail("hread");
    check_offset(fin, off, "input/eof");
    check_offset(fout, off, "output/eof");

    if (hseek(fin, 200, SEEK_SET) < 0) fail("hseek/set");
    if (hseek(fout, 200, SEEK_SET) < 0) fail("hseek(output)");
    check_offset(fin, 200, "input/backto200");
    check_offset(fout, 200, "output/backto200");
    n = hread(fin, buffer, 800);
    if (n < 0) fail("hread");
    else if (n != 800) fail("hread only got %d", (int)n);
    if (hwrite(fout, buffer, 800) != 800) fail("hwrite");
    check_offset(fin, 1000, "input/wrote800");
    check_offset(fout, 1000, "output/wrote800");

    if (hflush(fout) == EOF) fail("hflush");

    original = slurp("vcf.c");
    for (i = 1; i <= 5; i++) {
        char *text;
        sprintf(buffer, "test/hfile%d.tmp", i);
        text = slurp(buffer);
        if (strcmp(original, text) != 0) {
            fprintf(stderr, "%s differs from vcf.c\n", buffer);
            return EXIT_FAILURE;
        }
        free(text);
    }
    free(original);

    if (hclose(fin) != 0) fail("hclose(input)");
    if (hclose(fout) != 0) fail("hclose(output)");

    fout = hopen("test/hfile_chars.tmp", "w");
    if (fout == NULL) fail("hopen(\"test/hfile_chars.tmp\")");
    for (i = 0; i < 256; i++)
        if (hputc(i, fout) != i) fail("chars: hputc (%d)", i);
    if (hclose(fout) != 0) fail("hclose(test/hfile_chars.tmp)");

    fin = hopen("test/hfile_chars.tmp", "r");
    if (fin == NULL) fail("hopen(\"test/hfile_chars.tmp\") for reading");
    for (i = 0; i < 256; i++)
        if ((c = hgetc(fin)) != i)
            fail("chars: hgetc (%d = 0x%x) returned %d = 0x%x", i, i, c, c);
    if ((c = hgetc(fin)) != EOF) fail("chars: hgetc (EOF) returned %d", c);
    if (hclose(fin) != 0) fail("hclose(test/hfile_chars.tmp) for reading");

    fin = hopen("data:hello, world!\n", "r");
    if (fin == NULL) fail("hopen(\"data:...\")");
    n = hread(fin, buffer, 300);
    if (n < 0) fail("hread");
    buffer[n] = '\0';
    if (strcmp(buffer, "hello, world!\n") != 0) fail("hread result");
    if (hclose(fin) != 0) fail("hclose(\"data:...\")");

    return EXIT_SUCCESS;
}
Exemplo n.º 20
0
Arquivo: lex.c Projeto: AMDmi3/zsh
mod_export int
parse_subst_string(char *s)
{
    int c, l = strlen(s), err;
    char *ptr;
    enum lextok ctok;

    if (!*s || !strcmp(s, nulstring))
	return 0;
    zcontext_save();
    untokenize(s);
    inpush(dupstring(s), 0, NULL);
    strinbeg(0);
    lexbuf.len = 0;
    lexbuf.ptr = tokstr = s;
    lexbuf.siz = l + 1;
    c = hgetc();
    ctok = gettokstr(c, 1);
    err = errflag;
    strinend();
    inpop();
    DPUTS(cmdsp, "BUG: parse_subst_string: cmdstack not empty.");
    zcontext_restore();
    /* Keep any interrupt error status */
    errflag = err | (errflag & ERRFLAG_INT);
    if (ctok == LEXERR) {
	untokenize(s);
	return 1;
    }
#ifdef DEBUG
    /*
     * Historical note: we used to check here for olen (the value of lexbuf.len
     * before zcontext_restore()) == l, but that's not necessarily the case if
     * we stripped an RCQUOTE.
     */
    if (ctok != STRING || (errflag && !noerrs)) {
	fprintf(stderr, "Oops. Bug in parse_subst_string: %s\n",
		errflag ? "errflag" : "ctok != STRING");
	fflush(stderr);
	untokenize(s);
	return 1;
    }
#endif
    /* Check for $'...' quoting.  This needs special handling. */
    for (ptr = s; *ptr; )
    {
	if (*ptr == String && ptr[1] == Snull)
	{
	    char *t;
	    int len, tlen, diff;
	    t = getkeystring(ptr + 2, &len, GETKEYS_DOLLARS_QUOTE, NULL);
	    len += 2;
	    tlen = strlen(t);
	    diff = len - tlen;
	    /*
	     * Yuk.
	     * parse_subst_string() currently handles strings in-place.
	     * That's not so easy to fix without knowing whether
	     * additional memory should come off the heap or
	     * otherwise.  So we cheat by copying the unquoted string
	     * into place, unless it's too long.  That's not the
	     * normal case, but I'm worried there are pathological
	     * cases with converting metafied multibyte strings.
	     * If someone can prove there aren't I will be very happy.
	     */
	    if (diff < 0) {
		DPUTS(1, "$'...' subst too long: fix get_parse_string()");
		return 1;
	    }
	    memcpy(ptr, t, tlen);
	    ptr += tlen;
	    if (diff > 0) {
		char *dptr = ptr;
		char *sptr = ptr + diff;
		while ((*dptr++ = *sptr++))
		    ;
	    }
	} else
	    ptr++;
    }
    return 0;
}