godzil/ack
1
0
Fork 0
Code Issues Pull Requests Actions Packages Projects Releases Wiki Activity

Many improvements by Hans van Eck

Browse Source
This commit is contained in:
ceriel
1989-05-03 10:30:22 +00:00
parent 19638876a1
commit a94dec52d8
37 changed files with 1743 additions and 381 deletions
Download Patch File Download Diff File Expand all files Collapse all files

192
lang/pc/comp/LLlex.c
View File

@@ -36,6 +36,89 @@ struct type *toktype,
*asidetype;
static int eofseen;
extern int in_compound;
int tokenseen = 0; /* Some comment-options must precede any program text */
/* Warning: The options specified inside comments take precedence over
* the ones on the command line.
*/
CommentOptions()
{
register int ch, ci;
/* Parse options inside comments */
do {
LoadChar(ch);
ci = ch;
switch ( ci ) {
case 'c': /* for strings */
case 'd': /* for longs */
case 's': /* check for standard */
case 'u': /* for underscores */
case 'C': /* for different cases */
case 'U': /* for underscores */
if( tokenseen ) {
lexwarning("the '%c' option must precede any program text", ci);
break;
}
LoadChar(ch);
if( ci == 's' && options[ci] && ch == '-')
lexwarning("option '%c-' overrides previous one", ci);
if( ch == '-' ) options[ci] = 0;
else if( ch == '+' ) options[ci] = 1;
else PushBack();
break;
case 'l': ci = 'L' ; /* for indexing */
/* fall through */
case 'a': /* assertions */
case 't': /* tracing */
case 'A': /* extra array range-checks */
case 'L': /* FIL & LIN instructions */
case 'R': /* range checks */
{
int on_on_minus = (ci == 'L' || ci == 'R');
LoadChar(ch);
if( ch == '-' ) options[ci] = on_on_minus;
else if( ch == '+' ) options[ci] = !on_on_minus;
else PushBack();
break;
}
case 'i':
{
register int i=0;
LoadChar(ch);
while( ch >= '0' && ch <= '9' ) {
i = 10 * i + (ch - '0');
LoadChar(ch);
}
PushBack();
if( tokenseen ) {
lexwarning("the '%c' option must precede any program text", ci);
break;
}
if( i <= 0 ) {
lexwarning("bad '%c' option", ci);
break;
}
max_intset = i;
break;
}
default:
break;
}
LoadChar(ch);
} while (ch == ',' );
PushBack();
}
STATIC
SkipComment()
@@ -48,6 +131,7 @@ SkipComment()
register int ch;
LoadChar(ch);
if (ch == '$') CommentOptions();
for (;;) {
if( class(ch) == STNL ) {
LineNumber++;
@@ -70,9 +154,10 @@ SkipComment()
}
STATIC struct string *
GetString()
GetString( delim )
register int delim;
{
/* Read a Pascal string, delimited by the character "'".
/* Read a Pascal string, delimited by the character ' or ".
*/
register int ch;
register struct string *str = (struct string *)
@@ -83,9 +168,10 @@ GetString()
str->s_str = p = Malloc((unsigned int) ISTRSIZE);
for( ; ; ) {
LoadChar(ch);
if( ch & 0200 )
if( ch & 0200 ) {
fatal("non-ascii '\\%03o' read", ch & 0377);
/*NOTREACHED*/
}
if( class(ch) == STNL ) {
lexerror("newline in string");
LineNumber++;
@@ -98,9 +184,9 @@ GetString()
lexerror("end-of-file in string");
break;
}
if( ch == '\'' ) {
if( ch == delim ) {
LoadChar(ch);
if( ch != '\'' )
if( ch != delim )
break;
}
*p++ = ch;
@@ -128,6 +214,71 @@ GetString()
return str;
}
static char *s_error = "illegal line directive";
CheckForLineDirective()
{
register int ch;
register int i = 0;
char buf[IDFSIZE + 2];
register char *c = buf;
LoadChar(ch);
if( ch != '#' ) {
PushBack();
return;
}
do { /*
* Skip to next digit. Do not skip newlines.
*/
LoadChar(ch);
if( class(ch) == STNL ) {
LineNumber++;
lexerror(s_error);
return;
}
else if( ch == EOI ) {
eofseen = 1;
break;
}
} while( class(ch) != STNUM );
while( class(ch) == STNUM ) {
i = i * 10 + (ch - '0');
LoadChar(ch);
}
if( ch == EOI ) {
eofseen = 1;
}
while( ch != '"' && ch != EOI && class(ch) != STNL) LoadChar(ch);
if( ch == '"' ) {
do {
LoadChar(ch);
*c++ = ch;
if( class(ch) == STNL ) {
LineNumber++;
error(s_error);
return;
}
} while( ch != '"' );
*--c = '\0';
do {
LoadChar(ch);
} while( class(ch) != STNL );
/*
* Remember the filename
*/
if( !eofseen && strcmp(FileName, buf) ) {
FileName = Salloc(buf,(unsigned) strlen(buf) + 1);
}
}
if( eofseen ) {
error(s_error);
return;
}
LineNumber = i;
}
int
LLlex()
{
@@ -148,6 +299,7 @@ LLlex()
tk->tk_lineno = LineNumber;
again1:
if( eofseen ) {
eofseen = 0;
ch = EOI;
@@ -158,9 +310,10 @@ again:
if( !options['C'] ) /* -C : cases are different */
TO_LOWER(ch);
if( (ch & 0200) && ch != EOI )
if( (ch & 0200) && ch != EOI ) {
fatal("non-ascii '\\%03o' read", ch & 0377);
/*NOTREACHED*/
}
}
switch( class(ch) ) {
@@ -171,12 +324,16 @@ again:
#ifdef DEBUG
cntlines++;
#endif
goto again;
CheckForLineDirective();
goto again1;
case STSKIP:
goto again;
case STGARB:
if( !tokenseen && (ch == '"' || ch == '_') ) {
return tk->tk_symb = ch;
}
if( (unsigned) ch < 0177 )
lexerror("garbage char %c", ch);
else
@@ -189,7 +346,7 @@ again:
if( nch == '*' ) { /* (* */
SkipComment();
tk->tk_lineno = LineNumber;
goto again;
goto again1;
}
if( nch == '.' ) /* (. is [ */
return tk->tk_symb = '[';
@@ -199,7 +356,7 @@ again:
else if( ch == '{' ) {
SkipComment();
tk->tk_lineno = LineNumber;
goto again;
goto again1;
}
else if( ch == '@' ) ch = '^'; /* @ is ^ */
@@ -259,14 +416,15 @@ again:
if( ch == EOI ) eofseen = 1;
else PushBack();
if( buf[0] == '_' ) lexerror("underscore starts identifier");
tk->TOK_IDF = id = str2idf(buf, 1);
return tk->tk_symb = id->id_reserved ? id->id_reserved : IDENT;
}
case STSTR: {
register struct string *str = GetString();
register struct string *str = GetString(ch);
if( str->s_length == 1 ) {
if( str->s_length == 1 && ch == '\'') {
#ifdef DEBUG
if( options['l'] ) {
/* to prevent LexScan from crashing */
@@ -280,8 +438,14 @@ again:
free((char *) str);
}
else {
tk->tk_data.tk_str = str;
toktype = standard_type(T_STRING, 1, str->s_length);
if( ch == '\'' ) {
tk->tk_data.tk_str = str;
toktype = standard_type(T_STRINGCONST, 1, str->s_length);
}
else {
tk->tk_data.tk_str = str;
toktype = string_type;
}
}
return tk->tk_symb = STRING;
}
@@ -391,7 +555,7 @@ again:
tk->TOK_REL = Salloc("0.0", 4);
lexerror("floating constant too long");
}
else tk->TOK_REL = Salloc(buf, np - buf);
else tk->TOK_REL = Salloc(buf,(unsigned) (np - buf));
toktype = real_type;
return tk->tk_symb = REAL;