v13i002: Perl, a "replacement" for awk and sed, Part02/10
Rich Salz
rsalz at bbn.com
Mon Feb 1 23:46:46 AEST 1988
Submitted-by: Larry Wall <lwall at jpl-devvax.jpl.nasa.gov>
Posting-number: Volume 13, Issue 2
Archive-name: perl/part02
#! /bin/sh
# Make a new directory for the perl sources, cd to it, and run kits 1
# thru 10 through sh. When all 10 kits have been run, read README.
echo "This is perl 1.0 kit 2 (of 10). If kit 2 is complete, the line"
echo '"'"End of kit 2 (of 10)"'" will echo at the end.'
echo ""
export PATH || (echo "You didn't use sh, you clunch." ; kill $$)
echo Extracting perly.c
sed >perly.c <<'!STUFFY!FUNK!' -e 's/X//'
Xchar rcsid[] = "$Header: perly.c,v 1.0 87/12/18 15:53:31 root Exp $";
X/*
X * $Log: perly.c,v $
X * Revision 1.0 87/12/18 15:53:31 root
X * Initial revision
X *
X */
X
Xbool preprocess = FALSE;
Xbool assume_n = FALSE;
Xbool assume_p = FALSE;
Xbool doswitches = FALSE;
Xchar *filename;
Xchar *e_tmpname = "/tmp/perl-eXXXXXX";
XFILE *e_fp = Nullfp;
XARG *l();
X
Xmain(argc,argv,env)
Xregister int argc;
Xregister char **argv;
Xregister char **env;
X{
X register STR *str;
X register char *s;
X char *index();
X
X linestr = str_new(80);
X str = str_make("-I/usr/lib/perl "); /* first used for -I flags */
X for (argc--,argv++; argc; argc--,argv++) {
X if (argv[0][0] != '-' || !argv[0][1])
X break;
X reswitch:
X switch (argv[0][1]) {
X#ifdef DEBUGGING
X case 'D':
X debug = atoi(argv[0]+2);
X#ifdef YYDEBUG
X yydebug = (debug & 1);
X#endif
X break;
X#endif
X case 'e':
X if (!e_fp) {
X mktemp(e_tmpname);
X e_fp = fopen(e_tmpname,"w");
X }
X if (argv[1])
X fputs(argv[1],e_fp);
X putc('\n', e_fp);
X argc--,argv++;
X break;
X case 'i':
X inplace = savestr(argv[0]+2);
X argvoutstab = stabent("ARGVOUT",TRUE);
X break;
X case 'I':
X str_cat(str,argv[0]);
X str_cat(str," ");
X if (!argv[0][2]) {
X str_cat(str,argv[1]);
X argc--,argv++;
X str_cat(str," ");
X }
X break;
X case 'n':
X assume_n = TRUE;
X strcpy(argv[0], argv[0]+1);
X goto reswitch;
X case 'p':
X assume_p = TRUE;
X strcpy(argv[0], argv[0]+1);
X goto reswitch;
X case 'P':
X preprocess = TRUE;
X strcpy(argv[0], argv[0]+1);
X goto reswitch;
X case 's':
X doswitches = TRUE;
X strcpy(argv[0], argv[0]+1);
X goto reswitch;
X case 'v':
X version();
X exit(0);
X case '-':
X argc--,argv++;
X goto switch_end;
X case 0:
X break;
X default:
X fatal("Unrecognized switch: %s\n",argv[0]);
X }
X }
X switch_end:
X if (e_fp) {
X fclose(e_fp);
X argc++,argv--;
X argv[0] = e_tmpname;
X }
X
X str_set(&str_no,No);
X str_set(&str_yes,Yes);
X init_eval();
X
X /* open script */
X
X if (argv[0] == Nullch)
X argv[0] = "-";
X filename = savestr(argv[0]);
X if (strEQ(filename,"-"))
X argv[0] = "";
X if (preprocess) {
X sprintf(buf, "\
X/bin/sed -e '/^[^#]/b' \
X -e '/^#[ ]*include[ ]/b' \
X -e '/^#[ ]*define[ ]/b' \
X -e '/^#[ ]*if[ ]/b' \
X -e '/^#[ ]*ifdef[ ]/b' \
X -e '/^#[ ]*else/b' \
X -e '/^#[ ]*endif/b' \
X -e 's/^#.*//' \
X %s | /lib/cpp -C %s-",
X argv[0], str_get(str));
X rsfp = popen(buf,"r");
X }
X else if (!*argv[0])
X rsfp = stdin;
X else
X rsfp = fopen(argv[0],"r");
X if (rsfp == Nullfp)
X fatal("Perl script \"%s\" doesn't seem to exist.\n",filename);
X str_free(str); /* free -I directories */
X
X defstab = stabent("_",TRUE);
X
X /* init tokener */
X
X bufptr = str_get(linestr);
X
X /* now parse the report spec */
X
X if (yyparse())
X fatal("Execution aborted due to compilation errors.\n");
X
X if (e_fp) {
X e_fp = Nullfp;
X UNLINK(e_tmpname);
X }
X argc--,argv++; /* skip name of script */
X if (doswitches) {
X for (; argc > 0 && **argv == '-'; argc--,argv++) {
X if (argv[0][1] == '-') {
X argc--,argv++;
X break;
X }
X str_numset(stabent(argv[0]+1,TRUE)->stab_val,(double)1.0);
X }
X }
X if (argvstab = stabent("ARGV",FALSE)) {
X for (; argc > 0; argc--,argv++) {
X apush(argvstab->stab_array,str_make(argv[0]));
X }
X }
X if (envstab = stabent("ENV",FALSE)) {
X for (; *env; env++) {
X if (!(s = index(*env,'=')))
X continue;
X *s++ = '\0';
X str = str_make(s);
X str->str_link.str_magic = envstab;
X hstore(envstab->stab_hash,*env,str);
X *--s = '=';
X }
X }
X sigstab = stabent("SIG",FALSE);
X
X magicalize("!#?^~=-%0123456789.+&*(),\\/[|");
X
X (tmpstab = stabent("0",FALSE)) && str_set(STAB_STR(tmpstab),filename);
X (tmpstab = stabent("$",FALSE)) &&
X str_numset(STAB_STR(tmpstab),(double)getpid());
X
X tmpstab = stabent("stdin",TRUE);
X tmpstab->stab_io = stio_new();
X tmpstab->stab_io->fp = stdin;
X
X tmpstab = stabent("stdout",TRUE);
X tmpstab->stab_io = stio_new();
X tmpstab->stab_io->fp = stdout;
X defoutstab = tmpstab;
X curoutstab = tmpstab;
X
X tmpstab = stabent("stderr",TRUE);
X tmpstab->stab_io = stio_new();
X tmpstab->stab_io->fp = stderr;
X
X setjmp(top_env); /* sets goto_targ on longjump */
X
X#ifdef DEBUGGING
X if (debug & 1024)
X dump_cmd(main_root,Nullcmd);
X if (debug)
X fprintf(stderr,"\nEXECUTING...\n\n");
X#endif
X
X /* do it */
X
X (void) cmd_exec(main_root);
X
X if (goto_targ)
X fatal("Can't find label \"%s\"--aborting.\n",goto_targ);
X exit(0);
X}
X
Xmagicalize(list)
Xregister char *list;
X{
X register STAB *stab;
X char sym[2];
X
X sym[1] = '\0';
X while (*sym = *list++) {
X if (stab = stabent(sym,FALSE)) {
X stab->stab_flags = SF_VMAGIC;
X stab->stab_val->str_link.str_magic = stab;
X }
X }
X}
X
X#define RETURN(retval) return (bufptr = s,retval)
X#define OPERATOR(retval) return (expectterm = TRUE,bufptr = s,retval)
X#define TERM(retval) return (expectterm = FALSE,bufptr = s,retval)
X#define LOOPX(f) return (yylval.ival = f,expectterm = FALSE,bufptr = s,LOOPEX)
X#define UNI(f) return (yylval.ival = f,expectterm = TRUE,bufptr = s,UNIOP)
X#define FUN0(f) return (yylval.ival = f,expectterm = FALSE,bufptr = s,FUNC0)
X#define FUN1(f) return (yylval.ival = f,expectterm = FALSE,bufptr = s,FUNC1)
X#define FUN2(f) return (yylval.ival = f,expectterm = FALSE,bufptr = s,FUNC2)
X#define FUN3(f) return (yylval.ival = f,expectterm = FALSE,bufptr = s,FUNC3)
X#define SFUN(f) return (yylval.ival = f,expectterm = FALSE,bufptr = s,STABFUN)
X
Xyylex()
X{
X register char *s = bufptr;
X register char *d;
X register int tmp;
X static bool in_format = FALSE;
X static bool firstline = TRUE;
X
X retry:
X#ifdef YYDEBUG
X if (yydebug)
X if (index(s,'\n'))
X fprintf(stderr,"Tokener at %s",s);
X else
X fprintf(stderr,"Tokener at %s\n",s);
X#endif
X switch (*s) {
X default:
X fprintf(stderr,
X "Unrecognized character %c in file %s line %d--ignoring.\n",
X *s++,filename,line);
X goto retry;
X case 0:
X s = str_get(linestr);
X *s = '\0';
X if (firstline && (assume_n || assume_p)) {
X firstline = FALSE;
X str_set(linestr,"while (<>) {");
X s = str_get(linestr);
X goto retry;
X }
X if (!rsfp)
X RETURN(0);
X if (in_format) {
X yylval.formval = load_format(); /* leaves . in buffer */
X in_format = FALSE;
X s = str_get(linestr);
X TERM(FORMLIST);
X }
X line++;
X if ((s = str_gets(linestr, rsfp)) == Nullch) {
X if (preprocess)
X pclose(rsfp);
X else if (rsfp != stdin)
X fclose(rsfp);
X rsfp = Nullfp;
X if (assume_n || assume_p) {
X str_set(linestr,assume_p ? "}continue{print;" : "");
X str_cat(linestr,"}");
X s = str_get(linestr);
X goto retry;
X }
X s = str_get(linestr);
X RETURN(0);
X }
X#ifdef DEBUG
X else if (firstline) {
X char *showinput();
X s = showinput();
X }
X#endif
X firstline = FALSE;
X goto retry;
X case ' ': case '\t':
X s++;
X goto retry;
X case '\n':
X case '#':
X if (preprocess && s == str_get(linestr) &&
X s[1] == ' ' && isdigit(s[2])) {
X line = atoi(s+2)-1;
X for (s += 2; isdigit(*s); s++) ;
X while (*s && isspace(*s)) s++;
X if (filename)
X safefree(filename);
X s[strlen(s)-1] = '\0'; /* wipe out newline */
X filename = savestr(s);
X s = str_get(linestr);
X }
X *s = '\0';
X if (lex_newlines)
X RETURN('\n');
X goto retry;
X case '+':
X case '-':
X if (s[1] == *s) {
X s++;
X if (*s++ == '+')
X RETURN(INC);
X else
X RETURN(DEC);
X }
X /* FALL THROUGH */
X case '*':
X case '%':
X case '^':
X case '~':
X case '(':
X case ',':
X case ':':
X case ';':
X case '{':
X case '[':
X tmp = *s++;
X OPERATOR(tmp);
X case ')':
X case ']':
X case '}':
X tmp = *s++;
X TERM(tmp);
X case '&':
X s++;
X tmp = *s++;
X if (tmp == '&')
X OPERATOR(ANDAND);
X s--;
X OPERATOR('&');
X case '|':
X s++;
X tmp = *s++;
X if (tmp == '|')
X OPERATOR(OROR);
X s--;
X OPERATOR('|');
X case '=':
X s++;
X tmp = *s++;
X if (tmp == '=')
X OPERATOR(EQ);
X if (tmp == '~')
X OPERATOR(MATCH);
X s--;
X OPERATOR('=');
X case '!':
X s++;
X tmp = *s++;
X if (tmp == '=')
X OPERATOR(NE);
X if (tmp == '~')
X OPERATOR(NMATCH);
X s--;
X OPERATOR('!');
X case '<':
X if (expectterm) {
X s = scanstr(s);
X TERM(RSTRING);
X }
X s++;
X tmp = *s++;
X if (tmp == '<')
X OPERATOR(LS);
X if (tmp == '=')
X OPERATOR(LE);
X s--;
X OPERATOR('<');
X case '>':
X s++;
X tmp = *s++;
X if (tmp == '>')
X OPERATOR(RS);
X if (tmp == '=')
X OPERATOR(GE);
X s--;
X OPERATOR('>');
X
X#define SNARFWORD \
X d = tokenbuf; \
X while (isalpha(*s) || isdigit(*s) || *s == '_') \
X *d++ = *s++; \
X *d = '\0'; \
X d = tokenbuf;
X
X case '$':
X if (s[1] == '#' && (isalpha(s[2]) || s[2] == '_')) {
X s++;
X s = scanreg(s,tokenbuf);
X yylval.stabval = aadd(stabent(tokenbuf,TRUE));
X TERM(ARYLEN);
X }
X s = scanreg(s,tokenbuf);
X yylval.stabval = stabent(tokenbuf,TRUE);
X TERM(REG);
X
X case '@':
X s = scanreg(s,tokenbuf);
X yylval.stabval = aadd(stabent(tokenbuf,TRUE));
X TERM(ARY);
X
X case '/': /* may either be division or pattern */
X case '?': /* may either be conditional or pattern */
X if (expectterm) {
X s = scanpat(s);
X TERM(PATTERN);
X }
X tmp = *s++;
X OPERATOR(tmp);
X
X case '.':
X if (!expectterm || !isdigit(s[1])) {
X s++;
X tmp = *s++;
X if (tmp == '.')
X OPERATOR(DOTDOT);
X s--;
X OPERATOR('.');
X }
X /* FALL THROUGH */
X case '0': case '1': case '2': case '3': case '4':
X case '5': case '6': case '7': case '8': case '9':
X case '\'': case '"': case '`':
X s = scanstr(s);
X TERM(RSTRING);
X
X case '_':
X SNARFWORD;
X yylval.cval = savestr(d);
X OPERATOR(WORD);
X case 'a': case 'A':
X SNARFWORD;
X yylval.cval = savestr(d);
X OPERATOR(WORD);
X case 'b': case 'B':
X SNARFWORD;
X yylval.cval = savestr(d);
X OPERATOR(WORD);
X case 'c': case 'C':
X SNARFWORD;
X if (strEQ(d,"continue"))
X OPERATOR(CONTINUE);
X if (strEQ(d,"chdir"))
X UNI(O_CHDIR);
X if (strEQ(d,"close"))
X OPERATOR(CLOSE);
X if (strEQ(d,"crypt"))
X FUN2(O_CRYPT);
X if (strEQ(d,"chop"))
X OPERATOR(CHOP);
X if (strEQ(d,"chmod")) {
X yylval.ival = O_CHMOD;
X OPERATOR(PRINT);
X }
X if (strEQ(d,"chown")) {
X yylval.ival = O_CHOWN;
X OPERATOR(PRINT);
X }
X yylval.cval = savestr(d);
X OPERATOR(WORD);
X case 'd': case 'D':
X SNARFWORD;
X if (strEQ(d,"do"))
X OPERATOR(DO);
X if (strEQ(d,"die"))
X UNI(O_DIE);
X yylval.cval = savestr(d);
X OPERATOR(WORD);
X case 'e': case 'E':
X SNARFWORD;
X if (strEQ(d,"else"))
X OPERATOR(ELSE);
X if (strEQ(d,"elsif"))
X OPERATOR(ELSIF);
X if (strEQ(d,"eq") || strEQ(d,"EQ"))
X OPERATOR(SEQ);
X if (strEQ(d,"exit"))
X UNI(O_EXIT);
X if (strEQ(d,"eof"))
X TERM(FEOF);
X if (strEQ(d,"exp"))
X FUN1(O_EXP);
X if (strEQ(d,"each"))
X SFUN(O_EACH);
X if (strEQ(d,"exec")) {
X yylval.ival = O_EXEC;
X OPERATOR(PRINT);
X }
X yylval.cval = savestr(d);
X OPERATOR(WORD);
X case 'f': case 'F':
X SNARFWORD;
X if (strEQ(d,"for"))
X OPERATOR(FOR);
X if (strEQ(d,"format")) {
X in_format = TRUE;
X OPERATOR(FORMAT);
X }
X if (strEQ(d,"fork"))
X FUN0(O_FORK);
X yylval.cval = savestr(d);
X OPERATOR(WORD);
X case 'g': case 'G':
X SNARFWORD;
X if (strEQ(d,"gt") || strEQ(d,"GT"))
X OPERATOR(SGT);
X if (strEQ(d,"ge") || strEQ(d,"GE"))
X OPERATOR(SGE);
X if (strEQ(d,"goto"))
X LOOPX(O_GOTO);
X if (strEQ(d,"gmtime"))
X FUN1(O_GMTIME);
X yylval.cval = savestr(d);
X OPERATOR(WORD);
X case 'h': case 'H':
X SNARFWORD;
X if (strEQ(d,"hex"))
X FUN1(O_HEX);
X yylval.cval = savestr(d);
X OPERATOR(WORD);
X case 'i': case 'I':
X SNARFWORD;
X if (strEQ(d,"if"))
X OPERATOR(IF);
X if (strEQ(d,"index"))
X FUN2(O_INDEX);
X if (strEQ(d,"int"))
X FUN1(O_INT);
X yylval.cval = savestr(d);
X OPERATOR(WORD);
X case 'j': case 'J':
X SNARFWORD;
X if (strEQ(d,"join"))
X OPERATOR(JOIN);
X yylval.cval = savestr(d);
X OPERATOR(WORD);
X case 'k': case 'K':
X SNARFWORD;
X if (strEQ(d,"keys"))
X SFUN(O_KEYS);
X if (strEQ(d,"kill")) {
X yylval.ival = O_KILL;
X OPERATOR(PRINT);
X }
X yylval.cval = savestr(d);
X OPERATOR(WORD);
X case 'l': case 'L':
X SNARFWORD;
X if (strEQ(d,"last"))
X LOOPX(O_LAST);
X if (strEQ(d,"length"))
X FUN1(O_LENGTH);
X if (strEQ(d,"lt") || strEQ(d,"LT"))
X OPERATOR(SLT);
X if (strEQ(d,"le") || strEQ(d,"LE"))
X OPERATOR(SLE);
X if (strEQ(d,"localtime"))
X FUN1(O_LOCALTIME);
X if (strEQ(d,"log"))
X FUN1(O_LOG);
X if (strEQ(d,"link"))
X FUN2(O_LINK);
X yylval.cval = savestr(d);
X OPERATOR(WORD);
X case 'm': case 'M':
X SNARFWORD;
X if (strEQ(d,"m")) {
X s = scanpat(s-1);
X TERM(PATTERN);
X }
X yylval.cval = savestr(d);
X OPERATOR(WORD);
X case 'n': case 'N':
X SNARFWORD;
X if (strEQ(d,"next"))
X LOOPX(O_NEXT);
X if (strEQ(d,"ne") || strEQ(d,"NE"))
X OPERATOR(SNE);
X yylval.cval = savestr(d);
X OPERATOR(WORD);
X case 'o': case 'O':
X SNARFWORD;
X if (strEQ(d,"open"))
X OPERATOR(OPEN);
X if (strEQ(d,"ord"))
X FUN1(O_ORD);
X if (strEQ(d,"oct"))
X FUN1(O_OCT);
X yylval.cval = savestr(d);
X OPERATOR(WORD);
X case 'p': case 'P':
X SNARFWORD;
X if (strEQ(d,"print")) {
X yylval.ival = O_PRINT;
X OPERATOR(PRINT);
X }
X if (strEQ(d,"printf")) {
X yylval.ival = O_PRTF;
X OPERATOR(PRINT);
X }
X if (strEQ(d,"push")) {
X yylval.ival = O_PUSH;
X OPERATOR(PUSH);
X }
X if (strEQ(d,"pop"))
X OPERATOR(POP);
X yylval.cval = savestr(d);
X OPERATOR(WORD);
X case 'q': case 'Q':
X SNARFWORD;
X yylval.cval = savestr(d);
X OPERATOR(WORD);
X case 'r': case 'R':
X SNARFWORD;
X if (strEQ(d,"reset"))
X UNI(O_RESET);
X if (strEQ(d,"redo"))
X LOOPX(O_REDO);
X if (strEQ(d,"rename"))
X FUN2(O_RENAME);
X yylval.cval = savestr(d);
X OPERATOR(WORD);
X case 's': case 'S':
X SNARFWORD;
X if (strEQ(d,"s")) {
X s = scansubst(s);
X TERM(SUBST);
X }
X if (strEQ(d,"shift"))
X TERM(SHIFT);
X if (strEQ(d,"split"))
X TERM(SPLIT);
X if (strEQ(d,"substr"))
X FUN3(O_SUBSTR);
X if (strEQ(d,"sprintf"))
X OPERATOR(SPRINTF);
X if (strEQ(d,"sub"))
X OPERATOR(SUB);
X if (strEQ(d,"select"))
X OPERATOR(SELECT);
X if (strEQ(d,"seek"))
X OPERATOR(SEEK);
X if (strEQ(d,"stat"))
X OPERATOR(STAT);
X if (strEQ(d,"sqrt"))
X FUN1(O_SQRT);
X if (strEQ(d,"sleep"))
X UNI(O_SLEEP);
X if (strEQ(d,"system")) {
X yylval.ival = O_SYSTEM;
X OPERATOR(PRINT);
X }
X yylval.cval = savestr(d);
X OPERATOR(WORD);
X case 't': case 'T':
X SNARFWORD;
X if (strEQ(d,"tr")) {
X s = scantrans(s);
X TERM(TRANS);
X }
X if (strEQ(d,"tell"))
X TERM(TELL);
X if (strEQ(d,"time"))
X FUN0(O_TIME);
X if (strEQ(d,"times"))
X FUN0(O_TMS);
X yylval.cval = savestr(d);
X OPERATOR(WORD);
X case 'u': case 'U':
X SNARFWORD;
X if (strEQ(d,"using"))
X OPERATOR(USING);
X if (strEQ(d,"until"))
X OPERATOR(UNTIL);
X if (strEQ(d,"unless"))
X OPERATOR(UNLESS);
X if (strEQ(d,"umask"))
X FUN1(O_UMASK);
X if (strEQ(d,"unshift")) {
X yylval.ival = O_UNSHIFT;
X OPERATOR(PUSH);
X }
X if (strEQ(d,"unlink")) {
X yylval.ival = O_UNLINK;
X OPERATOR(PRINT);
X }
X yylval.cval = savestr(d);
X OPERATOR(WORD);
X case 'v': case 'V':
X SNARFWORD;
X if (strEQ(d,"values"))
X SFUN(O_VALUES);
X yylval.cval = savestr(d);
X OPERATOR(WORD);
X case 'w': case 'W':
X SNARFWORD;
X if (strEQ(d,"write"))
X TERM(WRITE);
X if (strEQ(d,"while"))
X OPERATOR(WHILE);
X yylval.cval = savestr(d);
X OPERATOR(WORD);
X case 'x': case 'X':
X SNARFWORD;
X if (!expectterm && strEQ(d,"x"))
X OPERATOR('x');
X yylval.cval = savestr(d);
X OPERATOR(WORD);
X case 'y': case 'Y':
X SNARFWORD;
X if (strEQ(d,"y")) {
X s = scantrans(s);
X TERM(TRANS);
X }
X yylval.cval = savestr(d);
X OPERATOR(WORD);
X case 'z': case 'Z':
X SNARFWORD;
X yylval.cval = savestr(d);
X OPERATOR(WORD);
X }
X}
X
XSTAB *
Xstabent(name,add)
Xregister char *name;
Xint add;
X{
X register STAB *stab;
X
X for (stab = stab_index[*name]; stab; stab = stab->stab_next) {
X if (strEQ(name,stab->stab_name))
X return stab;
X }
X
X /* no entry--should we add one? */
X
X if (add) {
X stab = (STAB *) safemalloc(sizeof(STAB));
X bzero((char*)stab, sizeof(STAB));
X stab->stab_name = savestr(name);
X stab->stab_val = str_new(0);
X stab->stab_next = stab_index[*name];
X stab_index[*name] = stab;
X return stab;
X }
X return Nullstab;
X}
X
XSTIO *
Xstio_new()
X{
X STIO *stio = (STIO *) safemalloc(sizeof(STIO));
X
X bzero((char*)stio, sizeof(STIO));
X stio->page_len = 60;
X return stio;
X}
X
Xchar *
Xscanreg(s,dest)
Xregister char *s;
Xchar *dest;
X{
X register char *d;
X
X s++;
X d = dest;
X while (isalpha(*s) || isdigit(*s) || *s == '_')
X *d++ = *s++;
X *d = '\0';
X d = dest;
X if (!*d) {
X *d = *s++;
X if (*d == '{') {
X d = dest;
X while (*s && *s != '}')
X *d++ = *s++;
X *d = '\0';
X d = dest;
X if (*s)
X s++;
X }
X else
X d[1] = '\0';
X }
X if (*d == '^' && !isspace(*s))
X *d = *s++ & 31;
X return s;
X}
X
XSTR *
Xscanconst(string)
Xchar *string;
X{
X register STR *retstr;
X register char *t;
X register char *d;
X
X if (index(string,'|')) {
X return Nullstr;
X }
X retstr = str_make(string);
X t = str_get(retstr);
X for (d=t; *d; ) {
X switch (*d) {
X case '.': case '[': case '$': case '(': case ')': case '|':
X *d = '\0';
X break;
X case '\\':
X if (index("wWbB0123456789",d[1])) {
X *d = '\0';
X break;
X }
X strcpy(d,d+1);
X switch(*d) {
X case 'n':
X *d = '\n';
X break;
X case 't':
X *d = '\t';
X break;
X case 'f':
X *d = '\f';
X break;
X case 'r':
X *d = '\r';
X break;
X }
X /* FALL THROUGH */
X default:
X if (d[1] == '*' || d[1] == '+' || d[1] == '?') {
X *d = '\0';
X break;
X }
X d++;
X }
X }
X if (!*t) {
X str_free(retstr);
X return Nullstr;
X }
X retstr->str_cur = strlen(retstr->str_ptr); /* XXX cheating here */
X return retstr;
X}
X
Xchar *
Xscanpat(s)
Xregister char *s;
X{
X register SPAT *spat = (SPAT *) safemalloc(sizeof (SPAT));
X register char *d;
X
X bzero((char *)spat, sizeof(SPAT));
X spat->spat_next = spat_root; /* link into spat list */
X spat_root = spat;
X init_compex(&spat->spat_compex);
X
X switch (*s++) {
X case 'm':
X s++;
X break;
X case '/':
X break;
X case '?':
X spat->spat_flags |= SPAT_USE_ONCE;
X break;
X default:
X fatal("Search pattern not found:\n%s",str_get(linestr));
X }
X s = cpytill(tokenbuf,s,s[-1]);
X if (!*s)
X fatal("Search pattern not terminated:\n%s",str_get(linestr));
X s++;
X if (*tokenbuf == '^') {
X spat->spat_first = scanconst(tokenbuf+1);
X if (spat->spat_first) {
X spat->spat_flen = strlen(spat->spat_first->str_ptr);
X if (spat->spat_flen == strlen(tokenbuf+1))
X spat->spat_flags |= SPAT_SCANALL;
X }
X }
X else {
X spat->spat_flags |= SPAT_SCANFIRST;
X spat->spat_first = scanconst(tokenbuf);
X if (spat->spat_first) {
X spat->spat_flen = strlen(spat->spat_first->str_ptr);
X if (spat->spat_flen == strlen(tokenbuf))
X spat->spat_flags |= SPAT_SCANALL;
X }
X }
X if (d = compile(&spat->spat_compex,tokenbuf,TRUE,FALSE))
X fatal(d);
X yylval.arg = make_match(O_MATCH,stab_to_arg(A_STAB,defstab),spat);
X return s;
X}
X
Xchar *
Xscansubst(s)
Xregister char *s;
X{
X register SPAT *spat = (SPAT *) safemalloc(sizeof (SPAT));
X register char *d;
X
X bzero((char *)spat, sizeof(SPAT));
X spat->spat_next = spat_root; /* link into spat list */
X spat_root = spat;
X init_compex(&spat->spat_compex);
X
X s = cpytill(tokenbuf,s+1,*s);
X if (!*s)
X fatal("Substitution pattern not terminated:\n%s",str_get(linestr));
X for (d=tokenbuf; *d; d++) {
X if (*d == '$' && d[1] && d[-1] != '\\' && d[1] != '|') {
X register ARG *arg;
X
X spat->spat_runtime = arg = op_new(1);
X arg->arg_type = O_ITEM;
X arg[1].arg_type = A_DOUBLE;
X arg[1].arg_ptr.arg_str = str_make(tokenbuf);
X goto get_repl; /* skip compiling for now */
X }
X }
X if (*tokenbuf == '^') {
X spat->spat_first = scanconst(tokenbuf+1);
X if (spat->spat_first)
X spat->spat_flen = strlen(spat->spat_first->str_ptr);
X }
X else {
X spat->spat_flags |= SPAT_SCANFIRST;
X spat->spat_first = scanconst(tokenbuf);
X if (spat->spat_first)
X spat->spat_flen = strlen(spat->spat_first->str_ptr);
X }
X if (d = compile(&spat->spat_compex,tokenbuf,TRUE,FALSE))
X fatal(d);
Xget_repl:
X s = scanstr(s);
X if (!*s)
X fatal("Substitution replacement not terminated:\n%s",str_get(linestr));
X spat->spat_repl = yylval.arg;
X if (*s == 'g') {
X s++;
X spat->spat_flags &= ~SPAT_USE_ONCE;
X }
X else
X spat->spat_flags |= SPAT_USE_ONCE;
X yylval.arg = make_match(O_SUBST,stab_to_arg(A_STAB,defstab),spat);
X return s;
X}
X
XARG *
Xmake_split(stab,arg)
Xregister STAB *stab;
Xregister ARG *arg;
X{
X if (arg->arg_type != O_MATCH) {
X register SPAT *spat = (SPAT *) safemalloc(sizeof (SPAT));
X register char *d;
X
X bzero((char *)spat, sizeof(SPAT));
X spat->spat_next = spat_root; /* link into spat list */
X spat_root = spat;
X init_compex(&spat->spat_compex);
X
X spat->spat_runtime = arg;
X arg = make_match(O_MATCH,stab_to_arg(A_STAB,defstab),spat);
X }
X arg->arg_type = O_SPLIT;
X arg[2].arg_ptr.arg_spat->spat_repl = stab_to_arg(A_STAB,aadd(stab));
X return arg;
X}
X
Xchar *
Xexpand_charset(s)
Xregister char *s;
X{
X char t[512];
X register char *d = t;
X register int i;
X
X while (*s) {
X if (s[1] == '-' && s[2]) {
X for (i = s[0]; i <= s[2]; i++)
X *d++ = i;
X s += 3;
X }
X else
X *d++ = *s++;
X }
X *d = '\0';
X return savestr(t);
X}
X
Xchar *
Xscantrans(s)
Xregister char *s;
X{
X ARG *arg =
X l(make_op(O_TRANS,2,stab_to_arg(A_STAB,defstab),Nullarg,Nullarg,0));
X register char *t;
X register char *r;
X register char *tbl = safemalloc(256);
X register int i;
X
X arg[2].arg_type = A_NULL;
X arg[2].arg_ptr.arg_cval = tbl;
X for (i=0; i<256; i++)
X tbl[i] = 0;
X s = scanstr(s);
X if (!*s)
X fatal("Translation pattern not terminated:\n%s",str_get(linestr));
X t = expand_charset(str_get(yylval.arg[1].arg_ptr.arg_str));
X free_arg(yylval.arg);
X s = scanstr(s-1);
X if (!*s)
X fatal("Translation replacement not terminated:\n%s",str_get(linestr));
X r = expand_charset(str_get(yylval.arg[1].arg_ptr.arg_str));
X free_arg(yylval.arg);
X yylval.arg = arg;
X if (!*r) {
X safefree(r);
X r = t;
X }
X for (i = 0; t[i]; i++) {
X if (!r[i])
X r[i] = r[i-1];
X tbl[t[i] & 0377] = r[i];
X }
X if (r != t)
X safefree(r);
X safefree(t);
X return s;
X}
X
XCMD *
Xblock_head(tail)
Xregister CMD *tail;
X{
X if (tail == Nullcmd) {
X return tail;
X }
X return tail->c_head;
X}
X
XCMD *
Xappend_line(head,tail)
Xregister CMD *head;
Xregister CMD *tail;
X{
X if (tail == Nullcmd)
X return head;
X if (!tail->c_head) /* make sure tail is well formed */
X tail->c_head = tail;
X if (head != Nullcmd) {
X tail = tail->c_head; /* get to start of tail list */
X if (!head->c_head)
X head->c_head = head; /* start a new head list */
X while (head->c_next) {
X head->c_next->c_head = head->c_head;
X head = head->c_next; /* get to end of head list */
X }
X head->c_next = tail; /* link to end of old list */
X tail->c_head = head->c_head; /* propagate head pointer */
X }
X while (tail->c_next) {
X tail->c_next->c_head = tail->c_head;
X tail = tail->c_next;
X }
X return tail;
X}
X
XCMD *
Xmake_acmd(type,stab,cond,arg)
Xint type;
XSTAB *stab;
XARG *cond;
XARG *arg;
X{
X register CMD *cmd = (CMD *) safemalloc(sizeof (CMD));
X
X bzero((char *)cmd, sizeof(CMD));
X cmd->c_type = type;
X cmd->ucmd.acmd.ac_stab = stab;
X cmd->ucmd.acmd.ac_expr = arg;
X cmd->c_expr = cond;
X if (cond) {
X opt_arg(cmd,1);
X cmd->c_flags |= CF_COND;
X }
X return cmd;
X}
X
XCMD *
Xmake_ccmd(type,arg,cblock)
Xint type;
Xregister ARG *arg;
Xstruct compcmd cblock;
X{
X register CMD *cmd = (CMD *) safemalloc(sizeof (CMD));
X
X bzero((char *)cmd, sizeof(CMD));
X cmd->c_type = type;
X cmd->c_expr = arg;
X cmd->ucmd.ccmd.cc_true = cblock.comp_true;
X cmd->ucmd.ccmd.cc_alt = cblock.comp_alt;
X if (arg) {
X opt_arg(cmd,1);
X cmd->c_flags |= CF_COND;
X }
X return cmd;
X}
X
Xvoid
Xopt_arg(cmd,fliporflop)
Xregister CMD *cmd;
Xint fliporflop;
X{
X register ARG *arg;
X int opt = CFT_EVAL;
X int sure = 0;
X ARG *arg2;
X char *tmps; /* for True macro */
X int context = 0; /* 0 = normal, 1 = before &&, 2 = before || */
X int flp = fliporflop;
X
X if (!cmd)
X return;
X arg = cmd->c_expr;
X
X /* Turn "if (!expr)" into "unless (expr)" */
X
X while (arg->arg_type == O_NOT && arg[1].arg_type == A_EXPR) {
X cmd->c_flags ^= CF_INVERT; /* flip sense of cmd */
X cmd->c_expr = arg[1].arg_ptr.arg_arg; /* hoist the rest of expr */
X free_arg(arg);
X arg = cmd->c_expr; /* here we go again */
X }
X
X if (!arg->arg_len) { /* sanity check */
X cmd->c_flags |= opt;
X return;
X }
X
X /* for "cond .. cond" we set up for the initial check */
X
X if (arg->arg_type == O_FLIP)
X context |= 4;
X
X /* for "cond && expr" and "cond || expr" we can ignore expr, sort of */
X
X if (arg->arg_type == O_AND)
X context |= 1;
X else if (arg->arg_type == O_OR)
X context |= 2;
X if (context && arg[flp].arg_type == A_EXPR) {
X arg = arg[flp].arg_ptr.arg_arg;
X flp = 1;
X }
X
X if (arg[flp].arg_flags & (AF_PRE|AF_POST)) {
X cmd->c_flags |= opt;
X return; /* side effect, can't optimize */
X }
X
X if (arg->arg_type == O_ITEM || arg->arg_type == O_FLIP ||
X arg->arg_type == O_AND || arg->arg_type == O_OR) {
X if (arg[flp].arg_type == A_SINGLE) {
X opt = (str_true(arg[flp].arg_ptr.arg_str) ? CFT_TRUE : CFT_FALSE);
X cmd->c_first = arg[flp].arg_ptr.arg_str;
X goto literal;
X }
X else if (arg[flp].arg_type == A_STAB || arg[flp].arg_type == A_LVAL) {
X cmd->c_stab = arg[flp].arg_ptr.arg_stab;
X opt = CFT_REG;
X literal:
X if (!context) { /* no && or ||? */
X free_arg(arg);
X cmd->c_expr = Nullarg;
X }
X if (!(context & 1))
X cmd->c_flags |= CF_EQSURE;
X if (!(context & 2))
X cmd->c_flags |= CF_NESURE;
X }
X }
X else if (arg->arg_type == O_MATCH || arg->arg_type == O_SUBST ||
X arg->arg_type == O_NMATCH || arg->arg_type == O_NSUBST) {
X if ((arg[1].arg_type == A_STAB || arg[1].arg_type == A_LVAL) &&
X arg[2].arg_type == A_SPAT &&
X arg[2].arg_ptr.arg_spat->spat_first ) {
X cmd->c_stab = arg[1].arg_ptr.arg_stab;
X cmd->c_first = arg[2].arg_ptr.arg_spat->spat_first;
X cmd->c_flen = arg[2].arg_ptr.arg_spat->spat_flen;
X if (arg[2].arg_ptr.arg_spat->spat_flags & SPAT_SCANALL &&
X (arg->arg_type == O_MATCH || arg->arg_type == O_NMATCH) )
X sure |= CF_EQSURE; /* (SUBST must be forced even */
X /* if we know it will work.) */
X arg[2].arg_ptr.arg_spat->spat_first = Nullstr;
X arg[2].arg_ptr.arg_spat->spat_flen = 0; /* only one chk */
X sure |= CF_NESURE; /* normally only sure if it fails */
X if (arg->arg_type == O_NMATCH || arg->arg_type == O_NSUBST)
X cmd->c_flags |= CF_FIRSTNEG;
X if (context & 1) { /* only sure if thing is false */
X if (cmd->c_flags & CF_FIRSTNEG)
X sure &= ~CF_NESURE;
X else
X sure &= ~CF_EQSURE;
X }
X else if (context & 2) { /* only sure if thing is true */
X if (cmd->c_flags & CF_FIRSTNEG)
X sure &= ~CF_EQSURE;
X else
X sure &= ~CF_NESURE;
X }
X if (sure & (CF_EQSURE|CF_NESURE)) { /* if we know anything*/
X if (arg[2].arg_ptr.arg_spat->spat_flags & SPAT_SCANFIRST)
X opt = CFT_SCAN;
X else
X opt = CFT_ANCHOR;
X if (sure == (CF_EQSURE|CF_NESURE) /* really sure? */
X && arg->arg_type == O_MATCH
X && context & 4
X && fliporflop == 1) {
X arg[2].arg_type = A_SINGLE; /* don't do twice */
X arg[2].arg_ptr.arg_str = &str_yes;
X }
X cmd->c_flags |= sure;
X }
X }
X }
X else if (arg->arg_type == O_SEQ || arg->arg_type == O_SNE ||
X arg->arg_type == O_SLT || arg->arg_type == O_SGT) {
X if (arg[1].arg_type == A_STAB || arg[1].arg_type == A_LVAL) {
X if (arg[2].arg_type == A_SINGLE) {
X cmd->c_stab = arg[1].arg_ptr.arg_stab;
X cmd->c_first = arg[2].arg_ptr.arg_str;
X cmd->c_flen = 30000;
X switch (arg->arg_type) {
X case O_SLT: case O_SGT:
X sure |= CF_EQSURE;
X cmd->c_flags |= CF_FIRSTNEG;
X break;
X case O_SNE:
X cmd->c_flags |= CF_FIRSTNEG;
X /* FALL THROUGH */
X case O_SEQ:
X sure |= CF_NESURE|CF_EQSURE;
X break;
X }
X if (context & 1) { /* only sure if thing is false */
X if (cmd->c_flags & CF_FIRSTNEG)
X sure &= ~CF_NESURE;
X else
X sure &= ~CF_EQSURE;
X }
X else if (context & 2) { /* only sure if thing is true */
X if (cmd->c_flags & CF_FIRSTNEG)
X sure &= ~CF_EQSURE;
X else
X sure &= ~CF_NESURE;
X }
X if (sure & (CF_EQSURE|CF_NESURE)) {
X opt = CFT_STROP;
X cmd->c_flags |= sure;
X }
X }
X }
X }
X else if (arg->arg_type == O_ASSIGN &&
X (arg[1].arg_type == A_STAB || arg[1].arg_type == A_LVAL) &&
X arg[1].arg_ptr.arg_stab == defstab &&
X arg[2].arg_type == A_EXPR ) {
X arg2 = arg[2].arg_ptr.arg_arg;
X if (arg2->arg_type == O_ITEM && arg2[1].arg_type == A_READ) {
X opt = CFT_GETS;
X cmd->c_stab = arg2[1].arg_ptr.arg_stab;
X if (!(arg2[1].arg_ptr.arg_stab->stab_io->flags & IOF_ARGV)) {
X free_arg(arg2);
X free_arg(arg);
X cmd->c_expr = Nullarg;
X }
X }
X }
X else if (arg->arg_type == O_CHOP &&
X (arg[1].arg_type == A_STAB || arg[1].arg_type == A_LVAL) ) {
X opt = CFT_CHOP;
X cmd->c_stab = arg[1].arg_ptr.arg_stab;
X free_arg(arg);
X cmd->c_expr = Nullarg;
X }
X if (context & 4)
X opt |= CF_FLIP;
X cmd->c_flags |= opt;
X
X if (cmd->c_flags & CF_FLIP) {
X if (fliporflop == 1) {
X arg = cmd->c_expr; /* get back to O_FLIP arg */
X arg[3].arg_ptr.arg_cmd = (CMD*)safemalloc(sizeof(CMD));
X bcopy((char *)cmd, (char *)arg[3].arg_ptr.arg_cmd, sizeof(CMD));
X arg[4].arg_ptr.arg_cmd = (CMD*)safemalloc(sizeof(CMD));
X bcopy((char *)cmd, (char *)arg[4].arg_ptr.arg_cmd, sizeof(CMD));
X opt_arg(arg[4].arg_ptr.arg_cmd,2);
X arg->arg_len = 2; /* this is a lie */
X }
X else {
X if ((opt & CF_OPTIMIZE) == CFT_EVAL)
X cmd->c_flags = (cmd->c_flags & ~CF_OPTIMIZE) | CFT_UNFLIP;
X }
X }
X}
X
XARG *
Xmod_match(type,left,pat)
Xregister ARG *left;
Xregister ARG *pat;
X{
X
X register SPAT *spat;
X register ARG *newarg;
X
X if ((pat->arg_type == O_MATCH ||
X pat->arg_type == O_SUBST ||
X pat->arg_type == O_TRANS ||
X pat->arg_type == O_SPLIT
X ) &&
X pat[1].arg_ptr.arg_stab == defstab ) {
X switch (pat->arg_type) {
X case O_MATCH:
X newarg = make_op(type == O_MATCH ? O_MATCH : O_NMATCH,
X pat->arg_len,
X left,Nullarg,Nullarg,0);
X break;
X case O_SUBST:
X newarg = l(make_op(type == O_MATCH ? O_SUBST : O_NSUBST,
X pat->arg_len,
X left,Nullarg,Nullarg,0));
X break;
X case O_TRANS:
X newarg = l(make_op(type == O_MATCH ? O_TRANS : O_NTRANS,
X pat->arg_len,
X left,Nullarg,Nullarg,0));
X break;
X case O_SPLIT:
X newarg = make_op(type == O_MATCH ? O_SPLIT : O_SPLIT,
X pat->arg_len,
X left,Nullarg,Nullarg,0);
X break;
X }
X if (pat->arg_len >= 2) {
X newarg[2].arg_type = pat[2].arg_type;
X newarg[2].arg_ptr = pat[2].arg_ptr;
X newarg[2].arg_flags = pat[2].arg_flags;
X if (pat->arg_len >= 3) {
X newarg[3].arg_type = pat[3].arg_type;
X newarg[3].arg_ptr = pat[3].arg_ptr;
X newarg[3].arg_flags = pat[3].arg_flags;
X }
X }
X safefree((char*)pat);
X }
X else {
X spat = (SPAT *) safemalloc(sizeof (SPAT));
X bzero((char *)spat, sizeof(SPAT));
X spat->spat_next = spat_root; /* link into spat list */
X spat_root = spat;
X init_compex(&spat->spat_compex);
X
X spat->spat_runtime = pat;
X newarg = make_op(type,2,left,Nullarg,Nullarg,0);
X newarg[2].arg_type = A_SPAT;
X newarg[2].arg_ptr.arg_spat = spat;
X newarg[2].arg_flags = AF_SPECIAL;
X }
X
X return newarg;
X}
X
XCMD *
Xadd_label(lbl,cmd)
Xchar *lbl;
Xregister CMD *cmd;
X{
X if (cmd)
X cmd->c_label = lbl;
X return cmd;
X}
X
XCMD *
Xaddcond(cmd, arg)
Xregister CMD *cmd;
Xregister ARG *arg;
X{
X cmd->c_expr = arg;
X opt_arg(cmd,1);
X cmd->c_flags |= CF_COND;
X return cmd;
X}
X
XCMD *
Xaddloop(cmd, arg)
Xregister CMD *cmd;
Xregister ARG *arg;
X{
X cmd->c_expr = arg;
X opt_arg(cmd,1);
X cmd->c_flags |= CF_COND|CF_LOOP;
X if (cmd->c_type == C_BLOCK)
X cmd->c_flags &= ~CF_COND;
X else {
X arg = cmd->ucmd.acmd.ac_expr;
X if (arg && arg->arg_type == O_ITEM && arg[1].arg_type == A_CMD)
X cmd->c_flags &= ~CF_COND; /* "do {} while" happens at least once */
X if (arg && arg->arg_type == O_SUBR)
X cmd->c_flags &= ~CF_COND; /* likewise for "do subr() while" */
X }
X return cmd;
X}
X
XCMD *
Xinvert(cmd)
Xregister CMD *cmd;
X{
X cmd->c_flags ^= CF_INVERT;
X return cmd;
X}
X
Xyyerror(s)
Xchar *s;
X{
X char tmpbuf[128];
X char *tname = tmpbuf;
X
X if (yychar > 256) {
X tname = tokename[yychar-256];
X if (strEQ(tname,"word"))
X strcpy(tname,tokenbuf);
X else if (strEQ(tname,"register"))
X sprintf(tname,"$%s",tokenbuf);
X else if (strEQ(tname,"array_length"))
X sprintf(tname,"$#%s",tokenbuf);
X }
X else if (!yychar)
X strcpy(tname,"EOF");
X else if (yychar < 32)
X sprintf(tname,"^%c",yychar+64);
X else if (yychar == 127)
X strcpy(tname,"^?");
X else
X sprintf(tname,"%c",yychar);
X printf("%s in file %s at line %d, next token \"%s\"\n",
X s,filename,line,tname);
X}
X
Xchar *
Xscanstr(s)
Xregister char *s;
X{
X register char term;
X register char *d;
X register ARG *arg;
X register bool makesingle = FALSE;
X char *leave = "\\$nrtfb0123456789"; /* which backslash sequences to keep */
X
X arg = op_new(1);
X yylval.arg = arg;
X arg->arg_type = O_ITEM;
X
X switch (*s) {
X default: /* a substitution replacement */
X arg[1].arg_type = A_DOUBLE;
X makesingle = TRUE; /* maybe disable runtime scanning */
X term = *s;
X if (term == '\'')
X leave = Nullch;
X goto snarf_it;
X case '0':
X {
X long i;
X int shift;
X
X arg[1].arg_type = A_SINGLE;
X if (s[1] == 'x') {
X shift = 4;
X s += 2;
X }
X else if (s[1] == '.')
X goto decimal;
X else
X shift = 3;
X i = 0;
X for (;;) {
X switch (*s) {
X default:
X goto out;
X case '8': case '9':
X if (shift != 4)
X fatal("Illegal octal digit at line %d",line);
X /* FALL THROUGH */
X case '0': case '1': case '2': case '3': case '4':
X case '5': case '6': case '7':
X i <<= shift;
X i += *s++ & 15;
X break;
X case 'a': case 'b': case 'c': case 'd': case 'e': case 'f':
X case 'A': case 'B': case 'C': case 'D': case 'E': case 'F':
X if (shift != 4)
X goto out;
X i <<= 4;
X i += (*s++ & 7) + 9;
X break;
X }
X }
X out:
X sprintf(tokenbuf,"%d",i);
X arg[1].arg_ptr.arg_str = str_make(tokenbuf);
X }
X break;
X case '1': case '2': case '3': case '4': case '5':
X case '6': case '7': case '8': case '9': case '.':
X decimal:
X arg[1].arg_type = A_SINGLE;
X d = tokenbuf;
X while (isdigit(*s) || *s == '_')
X *d++ = *s++;
X if (*s == '.' && index("0123456789eE",s[1]))
X *d++ = *s++;
X while (isdigit(*s) || *s == '_')
X *d++ = *s++;
X if (index("eE",*s) && index("+-0123456789",s[1]))
X *d++ = *s++;
X if (*s == '+' || *s == '-')
X *d++ = *s++;
X while (isdigit(*s))
X *d++ = *s++;
X *d = '\0';
X arg[1].arg_ptr.arg_str = str_make(tokenbuf);
X break;
X case '\'':
X arg[1].arg_type = A_SINGLE;
X term = *s;
X leave = Nullch;
X goto snarf_it;
X
X case '<':
X arg[1].arg_type = A_READ;
X s = cpytill(tokenbuf,s+1,'>');
X if (!*tokenbuf)
X strcpy(tokenbuf,"ARGV");
X if (*s)
X s++;
X if (rsfp == stdin && strEQ(tokenbuf,"stdin"))
X fatal("Can't get both program and data from <stdin>\n");
X arg[1].arg_ptr.arg_stab = stabent(tokenbuf,TRUE);
X arg[1].arg_ptr.arg_stab->stab_io = stio_new();
X if (strEQ(tokenbuf,"ARGV")) {
X aadd(arg[1].arg_ptr.arg_stab);
X arg[1].arg_ptr.arg_stab->stab_io->flags |= IOF_ARGV|IOF_START;
X }
X break;
X case '"':
X arg[1].arg_type = A_DOUBLE;
X makesingle = TRUE; /* maybe disable runtime scanning */
X term = *s;
X goto snarf_it;
X case '`':
X arg[1].arg_type = A_BACKTICK;
X term = *s;
X snarf_it:
X {
X STR *tmpstr;
X int sqstart = line;
X char *tmps;
X
X tmpstr = str_new(strlen(s));
X s = str_append_till(tmpstr,s+1,term,leave);
X while (!*s) { /* multiple line string? */
X s = str_gets(linestr, rsfp);
X if (!*s)
X fatal("EOF in string at line %d\n",sqstart);
X line++;
X s = str_append_till(tmpstr,s,term,leave);
X }
X s++;
X if (term == '\'') {
X arg[1].arg_ptr.arg_str = tmpstr;
X break;
X }
X tmps = s;
X s = d = tmpstr->str_ptr; /* assuming shrinkage only */
X while (*s) {
X if (*s == '$' && s[1]) {
X makesingle = FALSE; /* force interpretation */
X if (!isalpha(s[1])) { /* an internal register? */
X int len;
X
X len = scanreg(s,tokenbuf) - s;
X stabent(tokenbuf,TRUE); /* make sure it's created */
X while (len--)
X *d++ = *s++;
X continue;
X }
X }
X else if (*s == '\\' && s[1]) {
X s++;
X switch (*s) {
X default:
X defchar:
X if (!leave || index(leave,*s))
X *d++ = '\\';
X *d++ = *s++;
X continue;
X case '0': case '1': case '2': case '3':
X case '4': case '5': case '6': case '7':
X *d = *s++ - '0';
X if (index("01234567",*s)) {
X *d <<= 3;
X *d += *s++ - '0';
X }
X else if (!index('`"',term)) { /* oops, a subpattern */
X s--;
X goto defchar;
X }
X if (index("01234567",*s)) {
X *d <<= 3;
X *d += *s++ - '0';
X }
X d++;
X continue;
X case 'b':
X *d++ = '\b';
X break;
X case 'n':
X *d++ = '\n';
X break;
X case 'r':
X *d++ = '\r';
X break;
X case 'f':
X *d++ = '\f';
X break;
X case 't':
X *d++ = '\t';
X break;
X }
X s++;
X continue;
X }
X *d++ = *s++;
X }
X *d = '\0';
X if (arg[1].arg_type == A_DOUBLE) {
X if (makesingle)
X arg[1].arg_type = A_SINGLE; /* now we can optimize on it */
X else
X leave = "\\";
X for (d = s = tmpstr->str_ptr; *s; *d++ = *s++) {
X if (*s == '\\' && (!leave || index(leave,s[1])))
X s++;
X }
X *d = '\0';
X }
X tmpstr->str_cur = d - tmpstr->str_ptr; /* XXX cheat */
X arg[1].arg_ptr.arg_str = tmpstr;
X s = tmps;
X break;
X }
X }
X return s;
X}
X
XARG *
Xmake_op(type,newlen,arg1,arg2,arg3,dolist)
Xint type;
Xint newlen;
XARG *arg1;
XARG *arg2;
XARG *arg3;
Xint dolist;
X{
X register ARG *arg;
X register ARG *chld;
X register int doarg;
X
X arg = op_new(newlen);
X arg->arg_type = type;
X doarg = opargs[type];
X if (chld = arg1) {
X if (!(doarg & 1))
X arg[1].arg_flags |= AF_SPECIAL;
X if (doarg & 16)
X arg[1].arg_flags |= AF_NUMERIC;
X if (chld->arg_type == O_ITEM &&
X (hoistable[chld[1].arg_type] || chld[1].arg_type == A_LVAL) ) {
X arg[1].arg_type = chld[1].arg_type;
X arg[1].arg_ptr = chld[1].arg_ptr;
X arg[1].arg_flags |= chld[1].arg_flags;
X free_arg(chld);
X }
X else {
X arg[1].arg_type = A_EXPR;
X arg[1].arg_ptr.arg_arg = chld;
X if (dolist & 1) {
X if (chld->arg_type == O_LIST) {
X if (newlen == 1) { /* we can hoist entire list */
X chld->arg_type = type;
X free_arg(arg);
X arg = chld;
X }
X else {
X arg[1].arg_flags |= AF_SPECIAL;
X }
X }
X else if (chld->arg_type == O_ARRAY && chld->arg_len == 1)
X arg[1].arg_flags |= AF_SPECIAL;
X }
X }
X }
X if (chld = arg2) {
X if (!(doarg & 2))
X arg[2].arg_flags |= AF_SPECIAL;
X if (doarg & 32)
X arg[2].arg_flags |= AF_NUMERIC;
X if (chld->arg_type == O_ITEM &&
X (hoistable[chld[1].arg_type] ||
X (type == O_ASSIGN &&
X (chld[1].arg_type == A_READ ||
X chld[1].arg_type == A_DOUBLE ||
X chld[1].arg_type == A_BACKTICK ) ) ) ) {
X arg[2].arg_type = chld[1].arg_type;
X arg[2].arg_ptr = chld[1].arg_ptr;
X free_arg(chld);
X }
X else {
X arg[2].arg_type = A_EXPR;
X arg[2].arg_ptr.arg_arg = chld;
X if ((dolist & 2) &&
X (chld->arg_type == O_LIST ||
X (chld->arg_type == O_ARRAY && chld->arg_len == 1) ))
X arg[2].arg_flags |= AF_SPECIAL;
X }
X }
X if (chld = arg3) {
X if (!(doarg & 4))
X arg[3].arg_flags |= AF_SPECIAL;
X if (doarg & 64)
X arg[3].arg_flags |= AF_NUMERIC;
X if (chld->arg_type == O_ITEM && hoistable[chld[1].arg_type]) {
X arg[3].arg_type = chld[1].arg_type;
X arg[3].arg_ptr = chld[1].arg_ptr;
X free_arg(chld);
X }
X else {
X arg[3].arg_type = A_EXPR;
X arg[3].arg_ptr.arg_arg = chld;
X if ((dolist & 4) &&
X (chld->arg_type == O_LIST ||
X (chld->arg_type == O_ARRAY && chld->arg_len == 1) ))
X arg[3].arg_flags |= AF_SPECIAL;
X }
X }
X#ifdef DEBUGGING
X if (debug & 16) {
X fprintf(stderr,"%lx <= make_op(%s",arg,opname[arg->arg_type]);
X if (arg1)
X fprintf(stderr,",%s=%lx",
X argname[arg[1].arg_type],arg[1].arg_ptr.arg_arg);
X if (arg2)
X fprintf(stderr,",%s=%lx",
X argname[arg[2].arg_type],arg[2].arg_ptr.arg_arg);
X if (arg3)
X fprintf(stderr,",%s=%lx",
X argname[arg[3].arg_type],arg[3].arg_ptr.arg_arg);
X fprintf(stderr,")\n");
X }
X#endif
X evalstatic(arg); /* see if we can consolidate anything */
X return arg;
X}
X
X/* turn 123 into 123 == $. */
X
XARG *
Xflipflip(arg)
Xregister ARG *arg;
X{
X if (arg && arg->arg_type == O_ITEM && arg[1].arg_type == A_SINGLE) {
X arg = (ARG*)saferealloc((char*)arg,3*sizeof(ARG));
X arg->arg_type = O_EQ;
X arg->arg_len = 2;
X arg[2].arg_type = A_STAB;
X arg[2].arg_flags = 0;
X arg[2].arg_ptr.arg_stab = stabent(".",TRUE);
X }
X return arg;
X}
X
Xvoid
Xevalstatic(arg)
Xregister ARG *arg;
X{
X register STR *str;
X register STR *s1;
X register STR *s2;
X double value; /* must not be register */
X register char *tmps;
X int i;
X double exp(), log(), sqrt(), modf();
X char *crypt();
X
X if (!arg || !arg->arg_len)
X return;
X
X if (arg[1].arg_type == A_SINGLE &&
X (arg->arg_len == 1 || arg[2].arg_type == A_SINGLE) ) {
X str = str_new(0);
X s1 = arg[1].arg_ptr.arg_str;
X if (arg->arg_len > 1)
X s2 = arg[2].arg_ptr.arg_str;
X else
X s2 = Nullstr;
X switch (arg->arg_type) {
X default:
X str_free(str);
X str = Nullstr; /* can't be evaluated yet */
X break;
X case O_CONCAT:
X str_sset(str,s1);
X str_scat(str,s2);
X break;
X case O_REPEAT:
X i = (int)str_gnum(s2);
X while (i--)
X str_scat(str,s1);
X break;
X case O_MULTIPLY:
X value = str_gnum(s1);
X str_numset(str,value * str_gnum(s2));
X break;
X case O_DIVIDE:
X value = str_gnum(s1);
X str_numset(str,value / str_gnum(s2));
X break;
X case O_MODULO:
X value = str_gnum(s1);
X str_numset(str,(double)(((long)value) % ((long)str_gnum(s2))));
X break;
X case O_ADD:
X value = str_gnum(s1);
X str_numset(str,value + str_gnum(s2));
X break;
X case O_SUBTRACT:
X value = str_gnum(s1);
X str_numset(str,value - str_gnum(s2));
X break;
X case O_LEFT_SHIFT:
X value = str_gnum(s1);
X str_numset(str,(double)(((long)value) << ((long)str_gnum(s2))));
X break;
X case O_RIGHT_SHIFT:
X value = str_gnum(s1);
X str_numset(str,(double)(((long)value) >> ((long)str_gnum(s2))));
X break;
X case O_LT:
X value = str_gnum(s1);
X str_numset(str,(double)(value < str_gnum(s2)));
X break;
X case O_GT:
X value = str_gnum(s1);
X str_numset(str,(double)(value > str_gnum(s2)));
X break;
X case O_LE:
X value = str_gnum(s1);
X str_numset(str,(double)(value <= str_gnum(s2)));
X break;
X case O_GE:
X value = str_gnum(s1);
X str_numset(str,(double)(value >= str_gnum(s2)));
X break;
X case O_EQ:
X value = str_gnum(s1);
X str_numset(str,(double)(value == str_gnum(s2)));
X break;
X case O_NE:
X value = str_gnum(s1);
X str_numset(str,(double)(value != str_gnum(s2)));
X break;
X case O_BIT_AND:
X value = str_gnum(s1);
X str_numset(str,(double)(((long)value) & ((long)str_gnum(s2))));
X break;
X case O_XOR:
X value = str_gnum(s1);
X str_numset(str,(double)(((long)value) ^ ((long)str_gnum(s2))));
X break;
X case O_BIT_OR:
X value = str_gnum(s1);
X str_numset(str,(double)(((long)value) | ((long)str_gnum(s2))));
X break;
X case O_AND:
X if (str_true(s1))
X str = str_make(str_get(s2));
X else
X str = str_make(str_get(s1));
X break;
X case O_OR:
X if (str_true(s1))
X str = str_make(str_get(s1));
X else
X str = str_make(str_get(s2));
X break;
X case O_COND_EXPR:
X if (arg[3].arg_type != A_SINGLE) {
X str_free(str);
X str = Nullstr;
X }
X else {
X str = str_make(str_get(str_true(s1) ? s2 : arg[3].arg_ptr.arg_str));
X str_free(arg[3].arg_ptr.arg_str);
X }
X break;
X case O_NEGATE:
X str_numset(str,(double)(-str_gnum(s1)));
X break;
X case O_NOT:
X str_numset(str,(double)(!str_true(s1)));
X break;
X case O_COMPLEMENT:
X str_numset(str,(double)(~(long)str_gnum(s1)));
X break;
X case O_LENGTH:
X str_numset(str, (double)str_len(s1));
X break;
X case O_SUBSTR:
X if (arg[3].arg_type != A_SINGLE || stabent("[",FALSE)) {
X str_free(str); /* making the fallacious assumption */
X str = Nullstr; /* that any $[ occurs before substr()*/
X }
X else {
X char *beg;
X int len = (int)str_gnum(s2);
X int tmp;
X
X for (beg = str_get(s1); *beg && len > 0; beg++,len--) ;
X len = (int)str_gnum(arg[3].arg_ptr.arg_str);
X str_free(arg[3].arg_ptr.arg_str);
X if (len > (tmp = strlen(beg)))
X len = tmp;
X str_nset(str,beg,len);
X }
X break;
X case O_SLT:
X tmps = str_get(s1);
X str_numset(str,(double)(strLT(tmps,str_get(s2))));
X break;
X case O_SGT:
X tmps = str_get(s1);
X str_numset(str,(double)(strGT(tmps,str_get(s2))));
X break;
X case O_SLE:
X tmps = str_get(s1);
X str_numset(str,(double)(strLE(tmps,str_get(s2))));
X break;
X case O_SGE:
X tmps = str_get(s1);
X str_numset(str,(double)(strGE(tmps,str_get(s2))));
X break;
X case O_SEQ:
X tmps = str_get(s1);
X str_numset(str,(double)(strEQ(tmps,str_get(s2))));
X break;
X case O_SNE:
X tmps = str_get(s1);
X str_numset(str,(double)(strNE(tmps,str_get(s2))));
X break;
X case O_CRYPT:
X tmps = str_get(s1);
X str_set(str,crypt(tmps,str_get(s2)));
X break;
X case O_EXP:
X str_numset(str,exp(str_gnum(s1)));
X break;
X case O_LOG:
X str_numset(str,log(str_gnum(s1)));
X break;
X case O_SQRT:
X str_numset(str,sqrt(str_gnum(s1)));
X break;
X case O_INT:
X modf(str_gnum(s1),&value);
X str_numset(str,value);
X break;
X case O_ORD:
X str_numset(str,(double)(*str_get(s1)));
X break;
X }
X if (str) {
X arg->arg_type = O_ITEM; /* note arg1 type is already SINGLE */
X str_free(s1);
X str_free(s2);
X arg[1].arg_ptr.arg_str = str;
X }
X }
X}
X
XARG *
Xl(arg)
Xregister ARG *arg;
X{
X register int i;
X register ARG *arg1;
X
X arg->arg_flags |= AF_COMMON; /* XXX should cross-match */
X
X /* see if it's an array reference */
X
X if (arg[1].arg_type == A_EXPR) {
X arg1 = arg[1].arg_ptr.arg_arg;
X
X if (arg1->arg_type == O_LIST && arg->arg_type != O_ITEM) {
X /* assign to list */
X arg[1].arg_flags |= AF_SPECIAL;
X arg[2].arg_flags |= AF_SPECIAL;
X for (i = arg1->arg_len; i >= 1; i--) {
X switch (arg1[i].arg_type) {
X case A_STAB: case A_LVAL:
X arg1[i].arg_type = A_LVAL;
X break;
X case A_EXPR: case A_LEXPR:
X arg1[i].arg_type = A_LEXPR;
X if (arg1[i].arg_ptr.arg_arg->arg_type == O_ARRAY)
X arg1[i].arg_ptr.arg_arg->arg_type = O_LARRAY;
X else if (arg1[i].arg_ptr.arg_arg->arg_type == O_HASH)
X arg1[i].arg_ptr.arg_arg->arg_type = O_LHASH;
X if (arg1[i].arg_ptr.arg_arg->arg_type == O_LARRAY)
X break;
X if (arg1[i].arg_ptr.arg_arg->arg_type == O_LHASH)
X break;
X /* FALL THROUGH */
X default:
X sprintf(tokenbuf,
X "Illegal item (%s) as lvalue",argname[arg1[i].arg_type]);
X yyerror(tokenbuf);
X }
X }
X }
X else if (arg1->arg_type == O_ARRAY) {
X if (arg1->arg_len == 1 && arg->arg_type != O_ITEM) {
X /* assign to array */
X arg[1].arg_flags |= AF_SPECIAL;
X arg[2].arg_flags |= AF_SPECIAL;
X }
X else
X arg1->arg_type = O_LARRAY; /* assign to array elem */
X }
X else if (arg1->arg_type == O_HASH)
X arg1->arg_type = O_LHASH;
X else {
X sprintf(tokenbuf,
X "Illegal expression (%s) as lvalue",opname[arg1->arg_type]);
X yyerror(tokenbuf);
X }
X arg[1].arg_type = A_LEXPR;
X#ifdef DEBUGGING
X if (debug & 16)
X fprintf(stderr,"lval LEXPR\n");
X#endif
X return arg;
X }
X
X /* not an array reference, should be a register name */
X
X if (arg[1].arg_type != A_STAB && arg[1].arg_type != A_LVAL) {
X sprintf(tokenbuf,
X "Illegal item (%s) as lvalue",argname[arg[1].arg_type]);
X yyerror(tokenbuf);
X }
X arg[1].arg_type = A_LVAL;
X#ifdef DEBUGGING
X if (debug & 16)
X fprintf(stderr,"lval LVAL\n");
X#endif
X return arg;
X}
X
XARG *
Xaddflags(i,flags,arg)
Xregister ARG *arg;
X{
X arg[i].arg_flags |= flags;
X return arg;
X}
X
XARG *
Xhide_ary(arg)
XARG *arg;
X{
X if (arg->arg_type == O_ARRAY)
X return make_op(O_ITEM,1,arg,Nullarg,Nullarg,0);
X return arg;
X}
X
XARG *
Xmake_list(arg)
Xregister ARG *arg;
X{
X register int i;
X register ARG *node;
X register ARG *nxtnode;
X register int j;
X STR *tmpstr;
X
X if (!arg) {
X arg = op_new(0);
X arg->arg_type = O_LIST;
X }
X if (arg->arg_type != O_COMMA) {
X arg->arg_flags |= AF_LISTISH; /* see listish() below */
X return arg;
X }
X for (i = 2, node = arg; ; i++) {
X if (node->arg_len < 2)
X break;
X if (node[2].arg_type != A_EXPR)
X break;
X node = node[2].arg_ptr.arg_arg;
X if (node->arg_type != O_COMMA)
X break;
X }
X if (i > 2) {
X node = arg;
X arg = op_new(i);
X tmpstr = arg->arg_ptr.arg_str;
X *arg = *node; /* copy everything except the STR */
X arg->arg_ptr.arg_str = tmpstr;
X for (j = 1; ; ) {
X arg[j++] = node[1];
X if (j >= i) {
X arg[j] = node[2];
X free_arg(node);
X break;
X }
X nxtnode = node[2].arg_ptr.arg_arg;
X free_arg(node);
X node = nxtnode;
X }
X }
X arg->arg_type = O_LIST;
X arg->arg_len = i;
X return arg;
X}
X
X/* turn a single item into a list */
X
XARG *
Xlistish(arg)
XARG *arg;
X{
X if (arg->arg_flags & AF_LISTISH)
X arg = make_op(O_LIST,1,arg,Nullarg,Nullarg,0);
X return arg;
X}
X
XARG *
Xstab_to_arg(atype,stab)
Xint atype;
Xregister STAB *stab;
X{
X register ARG *arg;
X
X arg = op_new(1);
X arg->arg_type = O_ITEM;
X arg[1].arg_type = atype;
X arg[1].arg_ptr.arg_stab = stab;
X return arg;
X}
X
XARG *
Xcval_to_arg(cval)
Xregister char *cval;
X{
X register ARG *arg;
X
X arg = op_new(1);
X arg->arg_type = O_ITEM;
X arg[1].arg_type = A_SINGLE;
X arg[1].arg_ptr.arg_str = str_make(cval);
X safefree(cval);
X return arg;
X}
X
XARG *
Xop_new(numargs)
Xint numargs;
X{
X register ARG *arg;
X
X arg = (ARG*)safemalloc((numargs + 1) * sizeof (ARG));
X bzero((char *)arg, (numargs + 1) * sizeof (ARG));
X arg->arg_ptr.arg_str = str_new(0);
X arg->arg_len = numargs;
X return arg;
X}
X
Xvoid
Xfree_arg(arg)
XARG *arg;
X{
X str_free(arg->arg_ptr.arg_str);
X safefree((char*)arg);
X}
X
XARG *
Xmake_match(type,expr,spat)
Xint type;
XARG *expr;
XSPAT *spat;
X{
X register ARG *arg;
X
X arg = make_op(type,2,expr,Nullarg,Nullarg,0);
X
X arg[2].arg_type = A_SPAT;
X arg[2].arg_ptr.arg_spat = spat;
X#ifdef DEBUGGING
X if (debug & 16)
X fprintf(stderr,"make_match SPAT=%lx\n",spat);
X#endif
X
X if (type == O_SUBST || type == O_NSUBST) {
X if (arg[1].arg_type != A_STAB)
X yyerror("Illegal lvalue");
X arg[1].arg_type = A_LVAL;
X }
X return arg;
X}
X
XARG *
Xcmd_to_arg(cmd)
XCMD *cmd;
X{
X register ARG *arg;
X
X arg = op_new(1);
X arg->arg_type = O_ITEM;
X arg[1].arg_type = A_CMD;
X arg[1].arg_ptr.arg_cmd = cmd;
X return arg;
X}
X
XCMD *
Xwopt(cmd)
Xregister CMD *cmd;
X{
X register CMD *tail;
X register ARG *arg = cmd->c_expr;
X char *tmps; /* used by True macro */
X
X /* hoist "while (<channel>)" up into command block */
X
X if (arg && arg->arg_type == O_ITEM && arg[1].arg_type == A_READ) {
X cmd->c_flags &= ~CF_OPTIMIZE; /* clear optimization type */
X cmd->c_flags |= CFT_GETS; /* and set it to do the input */
X cmd->c_stab = arg[1].arg_ptr.arg_stab;
X if (arg[1].arg_ptr.arg_stab->stab_io->flags & IOF_ARGV) {
X cmd->c_expr = l(make_op(O_ASSIGN, 2, /* fake up "$_ =" */
X stab_to_arg(A_LVAL,defstab), arg, Nullarg,1 ));
X }
X else {
X free_arg(arg);
X cmd->c_expr = Nullarg;
X }
X }
X
X /* First find the end of the true list */
X
X if (cmd->ucmd.ccmd.cc_true == Nullcmd)
X return cmd;
X for (tail = cmd->ucmd.ccmd.cc_true; tail->c_next; tail = tail->c_next) ;
X
X /* if there's a continue block, link it to true block and find end */
X
X if (cmd->ucmd.ccmd.cc_alt != Nullcmd) {
X tail->c_next = cmd->ucmd.ccmd.cc_alt;
X for ( ; tail->c_next; tail = tail->c_next) ;
X }
X
X /* Here's the real trick: link the end of the list back to the beginning,
X * inserting a "last" block to break out of the loop. This saves one or
X * two procedure calls every time through the loop, because of how cmd_exec
X * does tail recursion.
X */
X
X tail->c_next = (CMD *) safemalloc(sizeof (CMD));
X tail = tail->c_next;
X if (!cmd->ucmd.ccmd.cc_alt)
X cmd->ucmd.ccmd.cc_alt = tail; /* every loop has a continue now */
X
X bcopy((char *)cmd, (char *)tail, sizeof(CMD));
X tail->c_type = C_EXPR;
X tail->c_flags ^= CF_INVERT; /* turn into "last unless" */
X tail->c_next = tail->ucmd.ccmd.cc_true; /* loop directly back to top */
X tail->ucmd.acmd.ac_expr = make_op(O_LAST,0,Nullarg,Nullarg,Nullarg,0);
X tail->ucmd.acmd.ac_stab = Nullstab;
X return cmd;
X}
X
XFCMD *
Xload_format()
X{
X FCMD froot;
X FCMD *flinebeg;
X register FCMD *fprev = &froot;
X register FCMD *fcmd;
X register char *s;
X register char *t;
X register char tmpchar;
X bool noblank;
X
X while ((s = str_gets(linestr,rsfp)) != Nullch) {
X line++;
X if (strEQ(s,".\n")) {
X bufptr = s;
X return froot.f_next;
X }
X if (*s == '#')
X continue;
X flinebeg = Nullfcmd;
X noblank = FALSE;
X while (*s) {
X fcmd = (FCMD *)safemalloc(sizeof (FCMD));
X bzero((char*)fcmd, sizeof (FCMD));
X fprev->f_next = fcmd;
X fprev = fcmd;
X for (t=s; *t && *t != '@' && *t != '^'; t++) {
X if (*t == '~') {
X noblank = TRUE;
X *t = ' ';
X }
X }
X tmpchar = *t;
X *t = '\0';
X fcmd->f_pre = savestr(s);
X fcmd->f_presize = strlen(s);
X *t = tmpchar;
X s = t;
X if (!*s) {
X if (noblank)
X fcmd->f_flags |= FC_NOBLANK;
X break;
X }
X if (!flinebeg)
X flinebeg = fcmd; /* start values here */
X if (*s++ == '^')
X fcmd->f_flags |= FC_CHOP; /* for doing text filling */
X switch (*s) {
X case '*':
X fcmd->f_type = F_LINES;
X *s = '\0';
X break;
X case '<':
X fcmd->f_type = F_LEFT;
X while (*s == '<')
X s++;
X break;
X case '>':
X fcmd->f_type = F_RIGHT;
X while (*s == '>')
X s++;
X break;
X case '|':
X fcmd->f_type = F_CENTER;
X while (*s == '|')
X s++;
X break;
X default:
X fcmd->f_type = F_LEFT;
X break;
X }
X if (fcmd->f_flags & FC_CHOP && *s == '.') {
X fcmd->f_flags |= FC_MORE;
X while (*s == '.')
X s++;
X }
X fcmd->f_size = s-t;
X }
X if (flinebeg) {
X again:
X if ((bufptr = str_gets(linestr ,rsfp)) == Nullch)
X goto badform;
X line++;
X if (strEQ(bufptr,".\n")) {
X yyerror("Missing values line");
X return froot.f_next;
X }
X if (*bufptr == '#')
X goto again;
X lex_newlines = TRUE;
X while (flinebeg || *bufptr) {
X switch(yylex()) {
X default:
X yyerror("Bad value in format");
X *bufptr = '\0';
X break;
X case '\n':
X if (flinebeg)
X yyerror("Missing value in format");
X *bufptr = '\0';
X break;
X case REG:
X yylval.arg = stab_to_arg(A_LVAL,yylval.stabval);
X /* FALL THROUGH */
X case RSTRING:
X if (!flinebeg)
X yyerror("Extra value in format");
X else {
X flinebeg->f_expr = yylval.arg;
X do {
X flinebeg = flinebeg->f_next;
X } while (flinebeg && flinebeg->f_size == 0);
X }
X break;
X case ',': case ';':
X continue;
X }
X }
X lex_newlines = FALSE;
X }
X }
X badform:
X bufptr = str_get(linestr);
X yyerror("Format not terminated");
X return froot.f_next;
X}
!STUFFY!FUNK!
echo ""
echo "End of kit 2 (of 10)"
cat /dev/null >kit2isdone
config=true
for iskit in 1 2 3 4 5 6 7 8 9 10; do
if test -f kit${iskit}isdone; then
echo "You have run kit ${iskit}."
else
echo "You still need to run kit ${iskit}."
config=false
fi
done
case $config in
true)
echo "You have run all your kits. Please read README and then type Configure."
chmod 755 Configure
;;
esac
: Someone might mail this, so...
exit
--
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