forked from schacon/perl
/
perly.c
2619 lines (2470 loc) · 57.4 KB
/
perly.c
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char rcsid[] = "$Header: perly.c,v 1.0.1.3 88/01/28 10:28:31 root Exp $";
/*
* $Log: perly.c,v $
* Revision 1.0.1.3 88/01/28 10:28:31 root
* patch8: added eval operator. Also fixed expectterm following right curly.
*
* Revision 1.0.1.2 88/01/24 00:06:03 root
* patch 2: s/(abc)/\1/ grandfathering didn't work right.
*
* Revision 1.0.1.1 88/01/21 21:25:57 root
* Now uses CPP and CPPMINUS symbols from config.h.
*
* Revision 1.0 87/12/18 15:53:31 root
* Initial revision
*
*/
bool preprocess = FALSE;
bool assume_n = FALSE;
bool assume_p = FALSE;
bool doswitches = FALSE;
bool allstabs = FALSE; /* init all customary symbols in symbol table?*/
char *filename;
char *e_tmpname = "/tmp/perl-eXXXXXX";
FILE *e_fp = Nullfp;
main(argc,argv,env)
register int argc;
register char **argv;
register char **env;
{
register STR *str;
register char *s;
char *index();
linestr = str_new(80);
str = str_make("-I/usr/lib/perl "); /* first used for -I flags */
for (argc--,argv++; argc; argc--,argv++) {
if (argv[0][0] != '-' || !argv[0][1])
break;
reswitch:
switch (argv[0][1]) {
#ifdef DEBUGGING
case 'D':
debug = atoi(argv[0]+2);
#ifdef YYDEBUG
yydebug = (debug & 1);
#endif
break;
#endif
case 'e':
if (!e_fp) {
e_tmpname = (char*) strdup(e_tmpname);
mkstemp(e_tmpname);
e_fp = fopen(e_tmpname,"w");
}
if (argv[1])
fputs(argv[1],e_fp);
putc('\n', e_fp);
argc--,argv++;
break;
case 'i':
inplace = savestr(argv[0]+2);
argvoutstab = stabent("ARGVOUT",TRUE);
break;
case 'I':
str_cat(str,argv[0]);
str_cat(str," ");
if (!argv[0][2]) {
str_cat(str,argv[1]);
argc--,argv++;
str_cat(str," ");
}
break;
case 'n':
assume_n = TRUE;
strcpy(argv[0], argv[0]+1);
goto reswitch;
case 'p':
assume_p = TRUE;
strcpy(argv[0], argv[0]+1);
goto reswitch;
case 'P':
preprocess = TRUE;
strcpy(argv[0], argv[0]+1);
goto reswitch;
case 's':
doswitches = TRUE;
strcpy(argv[0], argv[0]+1);
goto reswitch;
case 'v':
version();
exit(0);
case '-':
argc--,argv++;
goto switch_end;
case 0:
break;
default:
fatal("Unrecognized switch: %s\n",argv[0]);
}
}
switch_end:
if (e_fp) {
fclose(e_fp);
argc++,argv--;
argv[0] = e_tmpname;
}
str_set(&str_no,No);
str_set(&str_yes,Yes);
init_eval();
/* open script */
if (argv[0] == Nullch)
argv[0] = "-";
filename = savestr(argv[0]);
if (strEQ(filename,"-"))
argv[0] = "";
if (preprocess) {
sprintf(buf, "\
%s -e '/^[^#]/b' \
-e '/^#[ ]*include[ ]/b' \
-e '/^#[ ]*define[ ]/b' \
-e '/^#[ ]*if[ ]/b' \
-e '/^#[ ]*ifdef[ ]/b' \
-e '/^#[ ]*else/b' \
-e '/^#[ ]*endif/b' \
-e 's/^#.*//' \
%s | %s -C %s%s",
SED, argv[0], CPP, str_get(str), CPPMINUS);
rsfp = popen(buf,"r");
}
else if (!*argv[0])
rsfp = stdin;
else
rsfp = fopen(argv[0],"r");
if (rsfp == Nullfp)
fatal("Perl script \"%s\" doesn't seem to exist.\n",filename);
str_free(str); /* free -I directories */
defstab = stabent("_",TRUE);
/* init tokener */
bufptr = str_get(linestr);
/* now parse the report spec */
if (yyparse())
fatal("Execution aborted due to compilation errors.\n");
if (e_fp) {
e_fp = Nullfp;
UNLINK(e_tmpname);
}
argc--,argv++; /* skip name of script */
if (doswitches) {
for (; argc > 0 && **argv == '-'; argc--,argv++) {
if (argv[0][1] == '-') {
argc--,argv++;
break;
}
str_numset(stabent(argv[0]+1,TRUE)->stab_val,(double)1.0);
}
}
if (argvstab = stabent("ARGV",allstabs)) {
for (; argc > 0; argc--,argv++) {
apush(argvstab->stab_array,str_make(argv[0]));
}
}
if (envstab = stabent("ENV",allstabs)) {
for (; *env; env++) {
if (!(s = index(*env,'=')))
continue;
*s++ = '\0';
str = str_make(s);
str->str_link.str_magic = envstab;
hstore(envstab->stab_hash,*env,str);
*--s = '=';
}
}
sigstab = stabent("SIG",allstabs);
magicalize("!#?^~=-%0123456789.+&*(),\\/[|");
(tmpstab = stabent("0",allstabs)) && str_set(STAB_STR(tmpstab),filename);
(tmpstab = stabent("$",allstabs)) &&
str_numset(STAB_STR(tmpstab),(double)getpid());
tmpstab = stabent("stdin",TRUE);
tmpstab->stab_io = stio_new();
tmpstab->stab_io->fp = stdin;
tmpstab = stabent("stdout",TRUE);
tmpstab->stab_io = stio_new();
tmpstab->stab_io->fp = stdout;
defoutstab = tmpstab;
curoutstab = tmpstab;
tmpstab = stabent("stderr",TRUE);
tmpstab->stab_io = stio_new();
tmpstab->stab_io->fp = stderr;
safefree(filename);
filename = "(eval)";
setjmp(top_env); /* sets goto_targ on longjump */
#ifdef DEBUGGING
if (debug & 1024)
dump_cmd(main_root,Nullcmd);
if (debug)
fprintf(stderr,"\nEXECUTING...\n\n");
#endif
/* do it */
(void) cmd_exec(main_root);
if (goto_targ)
fatal("Can't find label \"%s\"--aborting.\n",goto_targ);
exit(0);
}
magicalize(list)
register char *list;
{
register STAB *stab;
char sym[2];
sym[1] = '\0';
while (*sym = *list++) {
if (stab = stabent(sym,allstabs)) {
stab->stab_flags = SF_VMAGIC;
stab->stab_val->str_link.str_magic = stab;
}
}
}
#define RETURN(retval) return (bufptr = s,retval)
#define OPERATOR(retval) return (expectterm = TRUE,bufptr = s,retval)
#define TERM(retval) return (expectterm = FALSE,bufptr = s,retval)
#define LOOPX(f) return (yylval.ival = f,expectterm = FALSE,bufptr = s,LOOPEX)
#define UNI(f) return (yylval.ival = f,expectterm = TRUE,bufptr = s,UNIOP)
#define FUN0(f) return (yylval.ival = f,expectterm = FALSE,bufptr = s,FUNC0)
#define FUN1(f) return (yylval.ival = f,expectterm = FALSE,bufptr = s,FUNC1)
#define FUN2(f) return (yylval.ival = f,expectterm = FALSE,bufptr = s,FUNC2)
#define FUN3(f) return (yylval.ival = f,expectterm = FALSE,bufptr = s,FUNC3)
#define SFUN(f) return (yylval.ival = f,expectterm = FALSE,bufptr = s,STABFUN)
yylex()
{
register char *s = bufptr;
register char *d;
register int tmp;
static bool in_format = FALSE;
static bool firstline = TRUE;
retry:
#ifdef YYDEBUG
if (yydebug)
if (index(s,'\n'))
fprintf(stderr,"Tokener at %s",s);
else
fprintf(stderr,"Tokener at %s\n",s);
#endif
switch (*s) {
default:
fprintf(stderr,
"Unrecognized character %c in file %s line %d--ignoring.\n",
*s++,filename,line);
goto retry;
case 0:
s = str_get(linestr);
*s = '\0';
if (firstline && (assume_n || assume_p)) {
firstline = FALSE;
str_set(linestr,"while (<>) {");
s = str_get(linestr);
goto retry;
}
if (!rsfp)
RETURN(0);
if (in_format) {
yylval.formval = load_format(); /* leaves . in buffer */
in_format = FALSE;
s = str_get(linestr);
TERM(FORMLIST);
}
line++;
if ((s = str_gets(linestr, rsfp)) == Nullch) {
if (preprocess)
pclose(rsfp);
else if (rsfp != stdin)
fclose(rsfp);
rsfp = Nullfp;
if (assume_n || assume_p) {
str_set(linestr,assume_p ? "}continue{print;" : "");
str_cat(linestr,"}");
s = str_get(linestr);
goto retry;
}
s = str_get(linestr);
RETURN(0);
}
#ifdef DEBUG
else if (firstline) {
char *showinput();
s = showinput();
}
#endif
firstline = FALSE;
goto retry;
case ' ': case '\t':
s++;
goto retry;
case '\n':
case '#':
if (preprocess && s == str_get(linestr) &&
s[1] == ' ' && isdigit(s[2])) {
line = atoi(s+2)-1;
for (s += 2; isdigit(*s); s++) ;
while (*s && isspace(*s)) s++;
if (filename)
safefree(filename);
s[strlen(s)-1] = '\0'; /* wipe out newline */
filename = savestr(s);
s = str_get(linestr);
}
if (in_eval) {
while (*s && *s != '\n')
s++;
if (*s)
s++;
line++;
}
else
*s = '\0';
if (lex_newlines)
RETURN('\n');
goto retry;
case '+':
case '-':
if (s[1] == *s) {
s++;
if (*s++ == '+')
RETURN(INC);
else
RETURN(DEC);
}
/* FALL THROUGH */
case '*':
case '%':
case '^':
case '~':
case '(':
case ',':
case ':':
case ';':
case '{':
case '[':
tmp = *s++;
OPERATOR(tmp);
case ')':
case ']':
tmp = *s++;
TERM(tmp);
case '}':
tmp = *s++;
for (d = s; *d == ' ' || *d == '\t'; d++) ;
if (*d == '\n' || *d == '#')
OPERATOR(tmp); /* block end */
else
TERM(tmp); /* associative array end */
case '&':
s++;
tmp = *s++;
if (tmp == '&')
OPERATOR(ANDAND);
s--;
OPERATOR('&');
case '|':
s++;
tmp = *s++;
if (tmp == '|')
OPERATOR(OROR);
s--;
OPERATOR('|');
case '=':
s++;
tmp = *s++;
if (tmp == '=')
OPERATOR(EQ);
if (tmp == '~')
OPERATOR(MATCH);
s--;
OPERATOR('=');
case '!':
s++;
tmp = *s++;
if (tmp == '=')
OPERATOR(NE);
if (tmp == '~')
OPERATOR(NMATCH);
s--;
OPERATOR('!');
case '<':
if (expectterm) {
s = scanstr(s);
TERM(RSTRING);
}
s++;
tmp = *s++;
if (tmp == '<')
OPERATOR(LS);
if (tmp == '=')
OPERATOR(LE);
s--;
OPERATOR('<');
case '>':
s++;
tmp = *s++;
if (tmp == '>')
OPERATOR(RS);
if (tmp == '=')
OPERATOR(GE);
s--;
OPERATOR('>');
#define SNARFWORD \
d = tokenbuf; \
while (isalpha(*s) || isdigit(*s) || *s == '_') \
*d++ = *s++; \
*d = '\0'; \
d = tokenbuf;
case '$':
if (s[1] == '#' && (isalpha(s[2]) || s[2] == '_')) {
s++;
s = scanreg(s,tokenbuf);
yylval.stabval = aadd(stabent(tokenbuf,TRUE));
TERM(ARYLEN);
}
s = scanreg(s,tokenbuf);
yylval.stabval = stabent(tokenbuf,TRUE);
TERM(REG);
case '@':
s = scanreg(s,tokenbuf);
yylval.stabval = aadd(stabent(tokenbuf,TRUE));
TERM(ARY);
case '/': /* may either be division or pattern */
case '?': /* may either be conditional or pattern */
if (expectterm) {
s = scanpat(s);
TERM(PATTERN);
}
tmp = *s++;
OPERATOR(tmp);
case '.':
if (!expectterm || !isdigit(s[1])) {
s++;
tmp = *s++;
if (tmp == '.')
OPERATOR(DOTDOT);
s--;
OPERATOR('.');
}
/* FALL THROUGH */
case '0': case '1': case '2': case '3': case '4':
case '5': case '6': case '7': case '8': case '9':
case '\'': case '"': case '`':
s = scanstr(s);
TERM(RSTRING);
case '_':
SNARFWORD;
yylval.cval = savestr(d);
OPERATOR(WORD);
case 'a': case 'A':
SNARFWORD;
yylval.cval = savestr(d);
OPERATOR(WORD);
case 'b': case 'B':
SNARFWORD;
yylval.cval = savestr(d);
OPERATOR(WORD);
case 'c': case 'C':
SNARFWORD;
if (strEQ(d,"continue"))
OPERATOR(CONTINUE);
if (strEQ(d,"chdir"))
UNI(O_CHDIR);
if (strEQ(d,"close"))
OPERATOR(CLOSE);
if (strEQ(d,"crypt"))
FUN2(O_CRYPT);
if (strEQ(d,"chop"))
OPERATOR(CHOP);
if (strEQ(d,"chmod")) {
yylval.ival = O_CHMOD;
OPERATOR(PRINT);
}
if (strEQ(d,"chown")) {
yylval.ival = O_CHOWN;
OPERATOR(PRINT);
}
yylval.cval = savestr(d);
OPERATOR(WORD);
case 'd': case 'D':
SNARFWORD;
if (strEQ(d,"do"))
OPERATOR(DO);
if (strEQ(d,"die"))
UNI(O_DIE);
yylval.cval = savestr(d);
OPERATOR(WORD);
case 'e': case 'E':
SNARFWORD;
if (strEQ(d,"else"))
OPERATOR(ELSE);
if (strEQ(d,"elsif"))
OPERATOR(ELSIF);
if (strEQ(d,"eq") || strEQ(d,"EQ"))
OPERATOR(SEQ);
if (strEQ(d,"exit"))
UNI(O_EXIT);
if (strEQ(d,"eval")) {
allstabs = TRUE; /* must initialize everything since */
UNI(O_EVAL); /* we don't know what will be used */
}
if (strEQ(d,"eof"))
TERM(FEOF);
if (strEQ(d,"exp"))
FUN1(O_EXP);
if (strEQ(d,"each"))
SFUN(O_EACH);
if (strEQ(d,"exec")) {
yylval.ival = O_EXEC;
OPERATOR(PRINT);
}
yylval.cval = savestr(d);
OPERATOR(WORD);
case 'f': case 'F':
SNARFWORD;
if (strEQ(d,"for"))
OPERATOR(FOR);
if (strEQ(d,"format")) {
in_format = TRUE;
OPERATOR(FORMAT);
}
if (strEQ(d,"fork"))
FUN0(O_FORK);
yylval.cval = savestr(d);
OPERATOR(WORD);
case 'g': case 'G':
SNARFWORD;
if (strEQ(d,"gt") || strEQ(d,"GT"))
OPERATOR(SGT);
if (strEQ(d,"ge") || strEQ(d,"GE"))
OPERATOR(SGE);
if (strEQ(d,"goto"))
LOOPX(O_GOTO);
if (strEQ(d,"gmtime"))
FUN1(O_GMTIME);
yylval.cval = savestr(d);
OPERATOR(WORD);
case 'h': case 'H':
SNARFWORD;
if (strEQ(d,"hex"))
FUN1(O_HEX);
yylval.cval = savestr(d);
OPERATOR(WORD);
case 'i': case 'I':
SNARFWORD;
if (strEQ(d,"if"))
OPERATOR(IF);
if (strEQ(d,"index"))
FUN2(O_INDEX);
if (strEQ(d,"int"))
FUN1(O_INT);
yylval.cval = savestr(d);
OPERATOR(WORD);
case 'j': case 'J':
SNARFWORD;
if (strEQ(d,"join"))
OPERATOR(JOIN);
yylval.cval = savestr(d);
OPERATOR(WORD);
case 'k': case 'K':
SNARFWORD;
if (strEQ(d,"keys"))
SFUN(O_KEYS);
if (strEQ(d,"kill")) {
yylval.ival = O_KILL;
OPERATOR(PRINT);
}
yylval.cval = savestr(d);
OPERATOR(WORD);
case 'l': case 'L':
SNARFWORD;
if (strEQ(d,"last"))
LOOPX(O_LAST);
if (strEQ(d,"length"))
FUN1(O_LENGTH);
if (strEQ(d,"lt") || strEQ(d,"LT"))
OPERATOR(SLT);
if (strEQ(d,"le") || strEQ(d,"LE"))
OPERATOR(SLE);
if (strEQ(d,"localtime"))
FUN1(O_LOCALTIME);
if (strEQ(d,"log"))
FUN1(O_LOG);
if (strEQ(d,"link"))
FUN2(O_LINK);
yylval.cval = savestr(d);
OPERATOR(WORD);
case 'm': case 'M':
SNARFWORD;
if (strEQ(d,"m")) {
s = scanpat(s-1);
TERM(PATTERN);
}
yylval.cval = savestr(d);
OPERATOR(WORD);
case 'n': case 'N':
SNARFWORD;
if (strEQ(d,"next"))
LOOPX(O_NEXT);
if (strEQ(d,"ne") || strEQ(d,"NE"))
OPERATOR(SNE);
yylval.cval = savestr(d);
OPERATOR(WORD);
case 'o': case 'O':
SNARFWORD;
if (strEQ(d,"open"))
OPERATOR(OPEN);
if (strEQ(d,"ord"))
FUN1(O_ORD);
if (strEQ(d,"oct"))
FUN1(O_OCT);
yylval.cval = savestr(d);
OPERATOR(WORD);
case 'p': case 'P':
SNARFWORD;
if (strEQ(d,"print")) {
yylval.ival = O_PRINT;
OPERATOR(PRINT);
}
if (strEQ(d,"printf")) {
yylval.ival = O_PRTF;
OPERATOR(PRINT);
}
if (strEQ(d,"push")) {
yylval.ival = O_PUSH;
OPERATOR(PUSH);
}
if (strEQ(d,"pop"))
OPERATOR(POP);
yylval.cval = savestr(d);
OPERATOR(WORD);
case 'q': case 'Q':
SNARFWORD;
yylval.cval = savestr(d);
OPERATOR(WORD);
case 'r': case 'R':
SNARFWORD;
if (strEQ(d,"reset"))
UNI(O_RESET);
if (strEQ(d,"redo"))
LOOPX(O_REDO);
if (strEQ(d,"rename"))
FUN2(O_RENAME);
yylval.cval = savestr(d);
OPERATOR(WORD);
case 's': case 'S':
SNARFWORD;
if (strEQ(d,"s")) {
s = scansubst(s);
TERM(SUBST);
}
if (strEQ(d,"shift"))
TERM(SHIFT);
if (strEQ(d,"split"))
TERM(SPLIT);
if (strEQ(d,"substr"))
FUN3(O_SUBSTR);
if (strEQ(d,"sprintf"))
OPERATOR(SPRINTF);
if (strEQ(d,"sub"))
OPERATOR(SUB);
if (strEQ(d,"select"))
OPERATOR(SELECT);
if (strEQ(d,"seek"))
OPERATOR(SEEK);
if (strEQ(d,"stat"))
OPERATOR(STAT);
if (strEQ(d,"sqrt"))
FUN1(O_SQRT);
if (strEQ(d,"sleep"))
UNI(O_SLEEP);
if (strEQ(d,"system")) {
yylval.ival = O_SYSTEM;
OPERATOR(PRINT);
}
yylval.cval = savestr(d);
OPERATOR(WORD);
case 't': case 'T':
SNARFWORD;
if (strEQ(d,"tr")) {
s = scantrans(s);
TERM(TRANS);
}
if (strEQ(d,"tell"))
TERM(TELL);
if (strEQ(d,"time"))
FUN0(O_TIME);
if (strEQ(d,"times"))
FUN0(O_TMS);
yylval.cval = savestr(d);
OPERATOR(WORD);
case 'u': case 'U':
SNARFWORD;
if (strEQ(d,"using"))
OPERATOR(USING);
if (strEQ(d,"until"))
OPERATOR(UNTIL);
if (strEQ(d,"unless"))
OPERATOR(UNLESS);
if (strEQ(d,"umask"))
FUN1(O_UMASK);
if (strEQ(d,"unshift")) {
yylval.ival = O_UNSHIFT;
OPERATOR(PUSH);
}
if (strEQ(d,"unlink")) {
yylval.ival = O_UNLINK;
OPERATOR(PRINT);
}
yylval.cval = savestr(d);
OPERATOR(WORD);
case 'v': case 'V':
SNARFWORD;
if (strEQ(d,"values"))
SFUN(O_VALUES);
yylval.cval = savestr(d);
OPERATOR(WORD);
case 'w': case 'W':
SNARFWORD;
if (strEQ(d,"write"))
TERM(WRITE);
if (strEQ(d,"while"))
OPERATOR(WHILE);
yylval.cval = savestr(d);
OPERATOR(WORD);
case 'x': case 'X':
SNARFWORD;
if (!expectterm && strEQ(d,"x"))
OPERATOR('x');
yylval.cval = savestr(d);
OPERATOR(WORD);
case 'y': case 'Y':
SNARFWORD;
if (strEQ(d,"y")) {
s = scantrans(s);
TERM(TRANS);
}
yylval.cval = savestr(d);
OPERATOR(WORD);
case 'z': case 'Z':
SNARFWORD;
yylval.cval = savestr(d);
OPERATOR(WORD);
}
}
STAB *
stabent(name,add)
register char *name;
int add;
{
register STAB *stab;
for (stab = stab_index[*name]; stab; stab = stab->stab_next) {
if (strEQ(name,stab->stab_name))
return stab;
}
/* no entry--should we add one? */
if (add) {
stab = (STAB *) safemalloc(sizeof(STAB));
bzero((char*)stab, sizeof(STAB));
stab->stab_name = savestr(name);
stab->stab_val = str_new(0);
stab->stab_next = stab_index[*name];
stab_index[*name] = stab;
return stab;
}
return Nullstab;
}
STIO *
stio_new()
{
STIO *stio = (STIO *) safemalloc(sizeof(STIO));
bzero((char*)stio, sizeof(STIO));
stio->page_len = 60;
return stio;
}
char *
scanreg(s,dest)
register char *s;
char *dest;
{
register char *d;
s++;
d = dest;
while (isalpha(*s) || isdigit(*s) || *s == '_')
*d++ = *s++;
*d = '\0';
d = dest;
if (!*d) {
*d = *s++;
if (*d == '{') {
d = dest;
while (*s && *s != '}')
*d++ = *s++;
*d = '\0';
d = dest;
if (*s)
s++;
}
else
d[1] = '\0';
}
if (*d == '^' && !isspace(*s))
*d = *s++ & 31;
return s;
}
STR *
scanconst(string)
char *string;
{
register STR *retstr;
register char *t;
register char *d;
if (index(string,'|')) {
return Nullstr;
}
retstr = str_make(string);
t = str_get(retstr);
for (d=t; *d; ) {
switch (*d) {
case '.': case '[': case '$': case '(': case ')': case '|':
*d = '\0';
break;
case '\\':
if (index("wWbB0123456789",d[1])) {
*d = '\0';
break;
}
strcpy(d,d+1);
switch(*d) {
case 'n':
*d = '\n';
break;
case 't':
*d = '\t';
break;
case 'f':
*d = '\f';
break;
case 'r':
*d = '\r';
break;
}
/* FALL THROUGH */
default:
if (d[1] == '*' || d[1] == '+' || d[1] == '?') {
*d = '\0';
break;
}
d++;
}
}
if (!*t) {
str_free(retstr);
return Nullstr;
}
retstr->str_cur = strlen(retstr->str_ptr); /* XXX cheating here */
return retstr;
}
char *
scanpat(s)
register char *s;
{
register SPAT *spat = (SPAT *) safemalloc(sizeof (SPAT));
register char *d;
bzero((char *)spat, sizeof(SPAT));
spat->spat_next = spat_root; /* link into spat list */
spat_root = spat;
init_compex(&spat->spat_compex);
switch (*s++) {
case 'm':
s++;
break;
case '/':
break;
case '?':
spat->spat_flags |= SPAT_USE_ONCE;
break;
default:
fatal("Search pattern not found:\n%s",str_get(linestr));
}
s = cpytill(tokenbuf,s,s[-1]);
if (!*s)
fatal("Search pattern not terminated:\n%s",str_get(linestr));
s++;
if (*tokenbuf == '^') {
spat->spat_first = scanconst(tokenbuf+1);
if (spat->spat_first) {
spat->spat_flen = strlen(spat->spat_first->str_ptr);
if (spat->spat_flen == strlen(tokenbuf+1))
spat->spat_flags |= SPAT_SCANALL;
}
}
else {
spat->spat_flags |= SPAT_SCANFIRST;
spat->spat_first = scanconst(tokenbuf);
if (spat->spat_first) {
spat->spat_flen = strlen(spat->spat_first->str_ptr);
if (spat->spat_flen == strlen(tokenbuf))
spat->spat_flags |= SPAT_SCANALL;
}
}
if (d = compile(&spat->spat_compex,tokenbuf,TRUE,FALSE))
fatal(d);
yylval.arg = make_match(O_MATCH,stab_to_arg(A_STAB,defstab),spat);
return s;
}
char *
scansubst(s)
register char *s;
{
register SPAT *spat = (SPAT *) safemalloc(sizeof (SPAT));
register char *d;
bzero((char *)spat, sizeof(SPAT));
spat->spat_next = spat_root; /* link into spat list */
spat_root = spat;
init_compex(&spat->spat_compex);
s = cpytill(tokenbuf,s+1,*s);
if (!*s)
fatal("Substitution pattern not terminated:\n%s",str_get(linestr));
for (d=tokenbuf; *d; d++) {
if (*d == '$' && d[1] && d[-1] != '\\' && d[1] != '|') {
register ARG *arg;
spat->spat_runtime = arg = op_new(1);
arg->arg_type = O_ITEM;
arg[1].arg_type = A_DOUBLE;
arg[1].arg_ptr.arg_str = str_make(tokenbuf);
goto get_repl; /* skip compiling for now */
}
}
if (*tokenbuf == '^') {
spat->spat_first = scanconst(tokenbuf+1);
if (spat->spat_first)
spat->spat_flen = strlen(spat->spat_first->str_ptr);
}
else {
spat->spat_flags |= SPAT_SCANFIRST;
spat->spat_first = scanconst(tokenbuf);
if (spat->spat_first)
spat->spat_flen = strlen(spat->spat_first->str_ptr);
}
if (d = compile(&spat->spat_compex,tokenbuf,TRUE,FALSE))
fatal(d);
get_repl:
s = scanstr(s);
if (!*s)
fatal("Substitution replacement not terminated:\n%s",str_get(linestr));
spat->spat_repl = yylval.arg;
if (*s == 'g') {
s++;
spat->spat_flags &= ~SPAT_USE_ONCE;