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gccomp.c
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/*
* gc3 - Gram's Commander v3.3: A configureable file manager
*
* YAGH! (tm) (Yet Another Gramish Hack)
*
* (c) 1994 by Graham Wheeler. All Rights Reserved.
*
* DISCLAIMER: The author is not responsible for any loss, damage,
* riots, earthquakes, catastrophes, marriages, annulments,
* etc that arise from the use of this program. Sorry...
*
* This software may be freely copied and distributed, provided it is
* distributed with all files intact and unmodified. You may use this
* software for a 30 day trial period, after which you should register
* your copy with me. I have spent a large number of weekends and nights
* trying to make a file manager for UNIX (and DOS) which combines ease
* of use and power, and complements the power of UNIX to process the
* contents of files with the power to *select* the files to be processed.
* By registering, you will encourage me to keep improving gc3, instead
* of seeking paying work which benefits only a few.
*
* Full details of how to register, and what you will receive if
* you do, are contained in the file LEGAL.DOC. Of course, if you
* don't register, I can't do much about it, but in that case
* may an obscure bug in gc3 erase all of your files!
*
* Enjoy using GC!
*
* See INSTALL.DOC for instructions on how to install GC3
*
* Version History
* ---------------
* v1.0 Nov 1992 Initial release
* v2.0 Nov 1992 Largely rewritten to be table-driven
* v2.1 Dec 1992 Support for non-ANSI C compilers contributed
* by George Sipe
* Support for old ioctls TCGETA and TCSETAW for
* those with no POSIX-style tcgetattr and tcsetattr.
* v2.2 Dec 1992 Termio ioctls removed.Hopefully much more
* portable. Command mode removed. A few bugs
* fixed. Placeholder replacement now done in
* a preprocessing phase before parsing commands.
* v2.3 Jan 1993 Split into a number of source files
* Basic port to MS-DOS
* v3.0 Feb/March '93 New script language; large parts rewritten
* v3.1 March '93 Ported back to UNIX and cleaned up
* v3.2b July '93 Many bugs fixed and features added
* v3.2 Oct '93 Viewer added, .gc3rul file handling
* added, bugs fixed, local variables and
* parameters, tree view and container handling.
* v3.3 April '94 Fixed lots of bugs. Large parts of compiler
* and interpreter are now table-driven. Changed
* screen repainting, and added support for colour
* and mono terminals. Added script-driven menus
* and forms, and hypertext help browser.
* Made windows moveable and resizeable.
* Made command handling in the script much more
* sophisticated with multiple prefix/suffixes.
* Improved command line history facility. Added
* repeat counts to most commands.
*/
#include "gcsite.h"
#include "gcport.h"
#include "gccc.h"
#include "gckey.h"
static short labelcnt = 1, innerloop = 0;
static short loopstack[MAX_LOOPS][2];
static int inDecl;
static short pnames[MAX_PARAMS],
vnames[MAX_LOCVARS]; /* indexes of their names */
static short trueString;
static int EM=1;
/******************************************
PARSER TABLE - this table stipulates
how to parse the simpler commands. If
a symbol has an entry in this table, the
opcode is used to determine the link info
from the ops[] table, which is then used
to determine how to do the parse as well.
******************************************/
static ParserRule_t ParseRules[] =
{
{ SYM_APPEND, OP_APPEND },
{ SYM_BOX, OP_BOX },
{ SYM_BEEP, OP_BEEP },
{ SYM_CD, OP_CD },
{ SYM_CLEAR, OP_CLEAR },
{ SYM_DOWN, OP_DOWN },
{ SYM_DUMP, OP_DUMP },
{ SYM_ECHO, OP_ECHO },
{ SYM_EDITTEXT, OP_EDITTEXT },
{ SYM_END, OP_END },
{ SYM_ENDREC, OP_ENDREC },
{ SYM_EXEC, OP_EXEC },
{ SYM_EXECCATCH, OP_EXECCATCH },
{ SYM_EXITTEXT, OP_EXITTEXT },
{ SYM_EXPAND, OP_EXPAND },
{ SYM_FILTER, OP_FILTER },
{ SYM_FINDAREA, OP_FINDAREA },
{ SYM_HBORDER, OP_HBORDER },
{ SYM_HOME, OP_HOME },
{ SYM_INVALIDATE, OP_INVALIDATE },
{ SYM_LOADITEM, OP_LOADITEM },
{ SYM_LOADRULES, OP_LOADRULES },
{ SYM_LOCATE, OP_LOCATE },
{ SYM_LOOKUP, OP_LOOKUP },
{ SYM_MAKEPATH, OP_MAKEPATH },
{ SYM_MODE, OP_MODE },
{ SYM_NEXTLINE, OP_NEXTLINE },
{ SYM_OPEN, OP_OPEN },
{ SYM_PAINT, OP_PAINT },
{ SYM_PGDN, OP_PGDN },
{ SYM_PGUP, OP_PGUP },
{ SYM_PLAYMAC, OP_PLAYMAC },
{ SYM_QUIT, OP_QUIT },
{ SYM_RECMAC, OP_RECMAC },
{ SYM_RESCAN, OP_RESCAN },
{ SYM_RESTORE, OP_RESTORE },
{ SYM_SLEEP, OP_SLEEP },
{ SYM_SPLIT, OP_SPLIT },
{ SYM_STRIP, OP_STRIP },
{ SYM_SYNC, OP_SYNC },
{ SYM_TEXT, OP_TEXT },
{ SYM_TOGGLE, OP_TOGGLE },
{ SYM_UP, OP_UP },
{ SYM_VBORDER, OP_VBORDER },
{ SYM_VIEW, OP_VIEW },
{ SYM_WINDOW, OP_WINDOW },
{ SYM_WRITE, OP_WRITE },
{ 0, 0 } /* end marker */
};
/********************************************
PROTOTYPES OF LOCALS
*********************************************/
#if __STDC__
static void initvars(void);
static short savestring(char *);
static short getArg(int no_funcs_allowed);
static int function(void);
static void command_list(void);
static void command(void);
static short string(void);
static void call(short f);
static void do_cmd(void);
static void stringcmd(enum codeops op);
static short regexp(void);
static void if_cmd(void);
static void loop_cmd(void);
static void search_expr(void);
static void expression(void);
static void show_cmd(void);
static void sort_cmd(void);
static void unlink_func(void);
static void while_cmd(void);
static void primary(void);
static short type_list(void);
static void read_cmd(void);
#else
static void initvars();
static short savestring();
static short getArg();
static int function();
static void command_list();
static void command();
static void stringcmd();
static void unlink_func();
static void loop_cmd();
static void while_cmd();
static void do_cmd();
static void if_cmd();
static void search_expr();
static void call();
static void show_cmd();
static void sort_cmd();
static void expression();
static short string();
static short regexp();
static void primary();
static short type_list();
static void read_cmd();
#endif
/********************************************
ERRORS AND WARNINGS
********************************************/
static char *(errormsg[]) = {
"Identifier redefined",
"Undefined identifier",
"Not in a loop",
"Bad RETURN command",
"Bad command",
"Bad relational operator",
"Bad string",
"Bad function key specifier",
"Bad control key specifier",
"Bad meta key specifier",
"Bad character key specifier",
"Bad key specifier",
"Bad integer",
"`;' expected",
"`)' expected",
"Identifier expected",
"`(' expected",
"`,' expected",
"`[' expected",
"`]' expected",
"`OF' expected",
"Syntax error",
"Namestore overflow",
"Malloc failure",
"Too many variables",
"Cannot open key definition file",
"Cannot open key code compilation file",
"Bad SHOW command argument",
"Too many labels",
"MARKED, ALL or a regular expression expected",
"Variable expected",
"Function name expected",
"Variable or regular expression expected",
"String expected",
"Colour expected",
"Numeric keyspec expected",
"Option expected",
"Invalid internal function in bind",
"Error in expression",
"Link unsuccessfull",
"Cannot bind/unbind this keyspec",
"Out of code space!",
"Sort key expected",
"Compare key expected",
"`compare' or `eval' expected",
"Too many parameters in call (max 10)",
"Wrong number of parameters in call",
"String used where a variable parameter is required",
"gcdefault function already defined",
"gcstartup function already defined",
"gcinit function already defined",
"No gcinit function found",
"No gcdefault function found",
"No gcstartup function found",
"ON or OFF expected",
"This function may not take parameters",
"Too many parameters",
"Too many local variables",
"Too many functions and global variables",
"gcafterkey function already defined",
"Internal error",
"Bad type list in typeof expression",
"Bad meta-combo key specifier",
"Bad command line editor key specifier",
"Bad monochrome attribute",
"Bad variable index"
};
#if __STDC__
void error(enum errort typ) {
#else
void error(typ)
enum errort typ;
{
#endif
if (lineno>=0)
fprintf(stderr,"ERROR: %s (line %d)\n",errormsg[(int)typ],lineno);
else fprintf(stderr,"ERROR: %s\n",errormsg[(int)typ]);
exit(0);
}
#if __STDC__
void warn(enum errort typ) {
#else
void warn(typ)
enum errort typ;
{
#endif
if (lineno>=0)
fprintf(stderr,"WARNING: %s (line %d)\n",errormsg[(int)typ],lineno);
else fprintf(stderr,"WARNING: %s\n",errormsg[(int)typ]);
}
/*******************************************
SYMBOL TABLE
********************************************/
#define MAXKEY 631
typedef struct namerecord *namerecordp;
struct namerecord {
namerecordp nextname;
short IDindex; /* Identifier index */
short refcnt;
};
static namerecordp *hash;
#if __STDC__
static short hashkey(char *keytext) {
#else
static short hashkey(keytext)
char *keytext;
{
#endif
short sum=0;
while (*keytext) {
sum += *keytext++;
sum %= 32641 /* 32768-127 */;
}
return sum % MAXKEY;
}
#if __STDC__
static void insert(char *name, short IDindex, short type)
#else
static void insert(name, IDindex, type)
char *name;
short IDindex, type;
#endif
{
namerecordp nrp;
short keyno = hashkey(name);
namemap[IDindex] = savestring(name);
objects[IDindex].p = (type&FUNC_TYPE)?-1:(varcnt++);
objects[IDindex].type = type;
if (varcnt>MAX_VARS) error(ER_VARS);
if ((nrp=(namerecordp)calloc(1,sizeof(struct namerecord)))!=NULL) {
nrp->nextname = hash[keyno];
nrp->IDindex = IDindex;
nrp->refcnt = 0;
hash[keyno] = nrp;
} else error(ER_MALLOC);
}
#if __STDC__
void freeStab(void)
#else
void freeStab()
#endif
{
int i;
for (i=0; i<MAXKEY; i++) {
while (hash[i]) {
namerecordp tmp = hash[i];
if (verbose && tmp->IDindex > LASTPREDEFVAR)
fprintf(stdout,"%3d references to identifier %s\n",
tmp->refcnt, ID_NAME(tmp->IDindex));
hash[i] = hash[i]->nextname;
free((char *)tmp);
}
}
free(hash);
}
#if __STDC__
static namerecordp lookup(char *name, short type)
#else
static namerecordp lookup(name, type)
char *name;
short type;
#endif
{
namerecordp nrp;
short keyno = hashkey(name);
for (nrp = hash[keyno] ; nrp ; nrp = nrp->nextname) {
fflush(stdout);
if (objects[nrp->IDindex].type&type
&& strcmp(name,ID_NAME(nrp->IDindex))==0)
break;
}
return nrp;
}
#if __STDC__
static short search(char *name, short type)
#else
static short search(name, type)
char *name;
short type;
#endif
{
namerecordp nrp;
int i;
if (type & VAR_TYPE) {
/* First look at local vars and params */
for (i=0;i<np;i++)
if (strcmp(LITERAL(pnames[i]),name)==0)
return TO_PARAM(i);
for (i=0;i<nv;i++)
if (strcmp(LITERAL(vnames[i]),name)==0)
return TO_LOCAL(i);
}
/* OK, try the symbol table */
if ((nrp = lookup(name,type)) == NULL) {
if (idents > MAX_IDS) error(ER_IDS);
insert(name,idents,type);
return idents++;
} else
{
nrp->refcnt++;
return nrp->IDindex;
}
}
#define initVar(n) insert(n,idents++,VAR_TYPE)
#if __STDC__
static void initvars(void) {
#else
static void initvars() {
#endif
hash = (namerecordp *)calloc(sizeof(namerecordp), MAXKEY);
if (hash == NULL) error(ER_MALLOC);
/* 0 */ initVar("GC3"); /* dummy - don't want var zero */
/* 1 */ initVar("PFILE");
/* 2 */ initVar("SFILE");
/* 3 */ initVar("PFILES");
/* 4 */ initVar("SFILES");
/* 5 */ initVar("PPATH");
/* 6 */ initVar("SPATH");
/* 7 */ initVar("PSEL");
/* 8 */ initVar("SSEL");
/* 9 */ initVar("PSELSIZE");
/* 10*/ initVar("SSELSIZE");
/* 11*/ initVar("PSELCNT");
/* 12*/ initVar("SSELCNT");
/* 13*/ initVar("PSIZE");
/* 14*/ initVar("SSIZE");
/* 15*/ initVar("PMTIME");
/* 16*/ initVar("SMTIME");
/* 17*/ initVar("PATIME");
/* 18*/ initVar("SATIME");
/* 19*/ initVar("POWNER");
/* 20*/ initVar("SOWNER");
/* 21*/ initVar("PGROUP");
/* 22*/ initVar("SGROUP");
/* 23*/ initVar("PPERMS");
/* 24*/ initVar("SPERMS");
/* 25*/ initVar("USERNAME"); /* login name */
/* 26*/ initVar("TEMPNAME");
/* 27*/ initVar("TEMPFILE");
/* 28*/ initVar("TEMPPATH");
/* 29*/ initVar("DATE");
/* 30*/ initVar("TIME");
/* 31*/ initVar("RANDOM");
/* 32*/ initVar("PREVCMD");
/* 33*/ initVar("NEXTCMD");
/* 34*/ initVar("DISKFREE");
/* 35*/ initVar("DISKUSED");
/* 36*/ initVar("VERSION");
/* 37*/ initVar("PATCHLEVEL");
/* 38*/ initVar("CODEPATH");
/* 39*/ initVar("VIEWLINE");
/* 40*/ initVar("VIEWFILE");
/* 41*/ initVar("WINDOW");
/* 42*/ initVar("DIRSELECT");
/* 43*/ initVar("DIRSFIRST");
/* 44*/ initVar("SHOWHIDDEN");
/* 45*/ initVar("FOLLOWLINKS");
/* 46*/ initVar("DOSPATTERNS");
/* 47*/ initVar("VIEWER");
/* 48*/ initVar("DEBUG");
/* 49*/ initVar("EXPAND");
/* 50*/ initVar("NUMBERLINES");
/* 51*/ initVar("DISPLAY");
/* 52*/ initVar("TREE");
/* 53*/ initVar("CONFIRM");
/* 54*/ initVar("WAIT");
/* 55*/ initVar("LINEBUFF");
/* 56*/ initVar("MESSAGE");
/* 57*/ initVar("CH");
/* 58*/ initVar("WIDTH");
/* 59*/ initVar("HEIGHT");
/* 60*/ initVar("LEFTMARGIN");
/* 61*/ initVar("TOPMARGIN");
/* 62*/ initVar("SHOWVIEW");
/* 63*/ initVar("SHOWSTATUS");
/* 64*/ initVar("SHELL");
/* 65*/ initVar("HELPFILE");
/* 66*/ initVar("HELPENTRY");
/* 67*/ initVar("ISCOLOR");
}
/********************************************
LEXICAL ANALYSER
*********************************************/
static char symtext[512];
static int newID = 0;
FILE *keydeffile;
unsigned ch = ' ';
static int symvalue;
static enum symboltype symbol;
static char *(cursorKeyNames[]) =
{
"Up", "Down", "Left", "Right",
"PgUp", "PgDn", "Home", "End",
"CtlLeft", "CtlRight", "CtlUp", "CtlDown",
"CtlPgUp", "CtlPgDn", "CtlHome", "CtlEnd",
"Ins", "Del", "Bkspc"
};
static char *reservedWords[] = {
COLOURS,
"ACCESS", "ACTION", "ALL", "AND", "APPEND", "ASCENDING", "ATIME", "ATTRIBUTE",
"BEEP", "BDEV", "BIND", "BOX", "BREAK", "BROWSE",
"CAT", "CD", "CDEV", "CLEAR", "COMPARE",
"CONTAINER", "CONTAINS", "CONTENTS", "CONTINUE", "COPY",
"DESCENDING", "DIR", "DO", "DOWN", "DUMP",
"ECHO", "EDITTEXT", "ELSE", "END", "ENDREC", "EVAL",
"EXEC", "EXECCATCH", "EXITTEXT", "EXPAND", "EXTENS",
"FILTER", "FINDAREA", "FROM",
"GCAFTERKEY", "GCDEFAULT", "GCINIT", "GCSTART", "GROUP",
"HBORDER", "HEAD", "HELP", "HOME",
"IF", "IN", "INPATH", "INVALIDATE", "IS",
"KEYCODE",
"LEFT", "LENGTH", "LINK", "LOADITEM", "LOADRULES",
"LOCAL", "LOCATE", "LOCK", "LOOKUP", "LOOP",
"MAKEPATH", "MARK", "MARKED", "MATCHES", "METAKEY", "MODE", "MOVE", "MTIME",
"NAME", "NEXTLINE", "NONE", "NOT",
"ON", "OPEN", "OR", "OWNER",
"PAINT", "PERMS", "PGDN", "PGUP", "PIPE", "PLAYMACRO", "PROCWIN",
"QUIT",
"RADIO", "READ", "RECMACRO", "REG",
"RESCAN", "RESTORE", "RETURN", "RIGHT",
"SEARCH", "SHOW",
"SIZE", "SLEEP", "SORTBY", "SPLIT", "STRIP", "SWAP", "SYNC",
"TAIL", "TEXT", "TO", "TOGGLE", "TYPEOF",
"UNBIND", "UNLINK", "UNMARK", "UP",
"VBORDER", "VIEW",
"WHILE", "WINDOW", "WRITE",
"YNTOGGLE"
};
#if __STDC__
static int isReserved(char *name)
#else
static int isReserved(name)
char *name;
#endif
{
int i;
for (i=0;i<(sizeof(reservedWords)/sizeof(reservedWords[0]));i++)
if (strcmp(name,reservedWords[i])==0)
return i;
return -1;
}
#if __STDC__
static short savestring(char *s)
#else
static short savestring(s)
char *s;
#endif
{
short rtn = stringp, l = strlen(s), i;
/* First see if we have a copy */
i = 0;
while (i<stringp) {
if (strcmp(stringspace+i,s)==0) return i;
i+=strlen(stringspace+i)+1;
}
stringp += l+1;
if (stringp >= STRINGSPACE) error(ER_NAMESTORE);
strcpy(stringspace+rtn,s);
return rtn;
}
static char defined[MAX_DEFS][16];
static int numdefs = 0;
#if __STDC__
void Define(char *name)
#else
void Define(name)
char *name;
#endif
{
if (numdefs<MAX_DEFS) strcpy((char *)defined[numdefs++],name);
else fprintf(stderr,"Too many IF_ names - can't define <%s>!\n",name);
}
#if __STDC__
static int isDefined(char *name)
#else
static int isDefined(name)
char *name;
#endif
{
int i;
for (i=0;i<MAX_DEFS;i++)
{
if (strcmp(name,defined[i])==0)
return i;
}
return -1;
}
#if __STDC__
static void nextchar(void)
#else
static void nextchar()
#endif
{
if (feof(keydeffile)) ch=ETX;
else do
{
ch = fgetc(keydeffile);
} while (!feof(keydeffile) && (ch<32 || ch>127)
&& ch!='\n' && ch!='\t');
}
#if __STDC__
void nextsymbol(void)
#else
void nextsymbol()
#endif
{
short length, IDindex, digit, var_ref;
char *tokenstring, tch;
int t;
symbol = SYM_UNDEF;
newID = 0;
while (symbol==SYM_UNDEF || !EM)
{
tokenstring = symtext;
*tokenstring = '\0';
var_ref = 0;
switch (ch) {
case ETX: symbol = SYM_EOF;
break;
case '\t':
case ' ': nextchar();
break;
case '\n': nextchar();
fprintf(stderr,"%d\r",++lineno);
break;
case '#': while (ch!='\n') nextchar();
break;
case '(': nextchar();
symbol = SYM_LPARENTHESIS;
break;
case ')': symbol = SYM_RPARENTHESIS;
nextchar();
break;
case '/': symbol = SYM_REGEXP;
goto doString;
case '\'':
case '"':
symbol = SYM_STRING;
doString:
tch = ch;
t = 0;
nextchar();
if (ch>=32 && ch<=126)
{
for (;;)
{
if (ch<32 || ch>126) error(ER_STRING);
if (ch=='#')
{
int oldch = ch;
nextchar();
if (ch!=tch)
{
*tokenstring++ = (char)oldch;
t++;
}
}
else if (ch==tch)
break;
*tokenstring++ = (char)ch;
t++;
nextchar();
}
nextchar();
}
else error(ER_STRING);
*tokenstring = '\0';
if (tch=='\'')
{
if (t==1)
{
symbol = SYM_INTEGER;
symvalue = symtext[0];
}
else if (t==2 && symtext[0]=='#')
{
symbol = SYM_INTEGER;
switch (symtext[1])
{
case 'n': symvalue = '\n';
break;
case 'r': symvalue = '\r';
break;
case 't': symvalue = '\t';
break;
default:
symvalue = symtext[1];
}
}
}
break;
case ';':
symbol = SYM_SEMICOLON;
nextchar();
break;
case ':':
symbol = SYM_COLON;
nextchar();
break;
case '{':
symbol = SYM_LBRACE;
nextchar();
break;
case '}':
symbol = SYM_RBRACE;
nextchar();
break;
case '[':
nextchar();
if (ch=='F')
{
nextchar();
if (ch<'0' || ch>'9')
error(ER_FKEY);
if (ch=='0') ch=9;
else ch -= '1';
symvalue = 20+ch;
nextchar();
}
else if (ch=='^')
{
nextchar();
if (ch>='a' && ch<='z')
ch -= ('a'-'A');
else if (ch<'A' || ch>'Z')
error(ER_CTRLKEY);
symvalue = 30+(ch-'A');
nextchar();
}
else if (ch=='+') /* meta-combo */
{
symvalue = 0;
nextchar();
if (ch>='0' && ch<='9')
{
symvalue = ch - '0';
nextchar();
if (ch>='0' && ch<='9')
{
symvalue = symvalue * 10 + ch - '0';
nextchar();
}
symvalue += START_META_KEYS;
}
else error(ER_COMBOKEY);
}
else if (ch=='*') /* cmdln editor key */
{
symvalue = 0;
nextchar();
if (ch>='0' && ch<='9')
{
symvalue = ch - '0';
nextchar();
if (ch>='0' && ch<='9')
{
symvalue = symvalue * 10 + ch - '0';
nextchar();
}
symvalue += START_CED_KEYS;
}
else error(ER_EDITKEY);
}
else if (ch=='M' || ch=='m')
{
nextchar();
if (ch>='0' && ch<='9')
ch -= '0';
else if (ch>='a' && ch<='z')
ch -= 'a'-10;
else if (ch>='A' && ch<='Z')
ch -= 'A'-10;
else error(ER_METAKEY);
symvalue = 60+ch;
nextchar();
}
else if (ch=='\'')
{
nextchar();
symvalue = ch-' '+100;
nextchar();
if (ch != '\'')
error(ER_CHARKEY);
nextchar();
}
else if (ch=='#')
{
/* Numeric keyspec */
int k=0;
nextchar();
if (EM && !isdigit(ch))
error(ER_DIGSPEC);
while (isdigit(ch))
{
k = k*10 + ch-'0';
nextchar();
}
symvalue = k;
}
else
{
char name[20], n2[20];
int i=0;
if (EM && !isalpha(ch))
error(ER_KEYSPEC);
while (isalpha(ch) && i<18)
{
name[i++] = ch;
nextchar();
}
name[i] = '\0';
STRUPR(name);
for (i=0;i<19;i++)
{
strcpy(n2,cursorKeyNames[i]);
STRUPR(n2);
if (strcmp(name,n2)==0)
{
symvalue = i;
break;
}
}
if (i>=19) error(ER_KEYSPEC);
}
if (ch!=']') error(ER_KEYSPEC);
nextchar();
symbol = SYM_KEYSPEC;
break;
case '=':
nextchar();
if (ch=='=')
{
nextchar();
symbol = SYM_EQUALS;
}
else symbol = SYM_ASSIGN;
break;
case '+':
symbol = SYM_PLUS;
nextchar();
break;
case ',':
symbol = SYM_COMMA;
nextchar();
break;
case '$':
nextchar();
var_ref = 1;
default:
if (!var_ref && (ch=='-' || isdigit(ch)))
{
short sgn = 1, base=10;
if (ch=='-')
{
sgn = -1;
nextchar();
if (!isdigit(ch))
error(ER_INTEGER);
}
symvalue = 0;
if (ch=='0')
{
nextchar();
if (ch=='x')
{
base = 16;
nextchar();
}
else base = 8; /* not supported */
}
while (isdigit(ch) || (base==16 && isxdigit(ch)))
{
if (base==16 && ch>'9')
{
if (ch>'Z') digit = ch-'a'+10;
else digit = ch-'A'+10;
}
else digit = ch-'0';
if (symvalue<=(MAXINT-digit)/base)
{
symvalue = base*symvalue+digit;
nextchar();
}
else error(ER_INTEGER);
}
symvalue *= sgn;
symbol = SYM_INTEGER;
}
else if (isalpha(ch) || ch=='_')
{
int oldid = idents-1;
length = 0;
while (isalnum(ch) || ch=='_')
{
ch = tolower(ch);
symtext[length++] = ch;
nextchar();
}
symtext[length]='\0';
STRUPR(symtext);
if (inDecl) symbol = SYM_DECL;
else if (!var_ref && strncmp(symtext,"IF_",3)==0)
{
EM = (isDefined(symtext+3)>=0);
symbol = SYM_UNDEF;
continue;
}
else if (!var_ref && (t=isReserved(symtext))>=0)
{
symbol = (enum symboltype)(t);
}
else if (EM)
{
if ((IDindex = search(symtext,
var_ref?VAR_TYPE:FUNC_TYPE)) > oldid)
newID = 1;
symbol = SYM_IDENTIFIER;
symvalue = (int)IDindex;
}
}
else
{
if (!isspace(ch) && !feof(keydeffile))
fprintf(stderr,"Warning: ignoring illegal character `%c' on line %d\n",ch,lineno);
symbol = SYM_UNDEF;
nextchar();
}
break;
}
}
}
#if __STDC__
static void expect(enum symboltype s)
#else
static void expect(s)
enum symboltype s;
#endif
{
if (symbol == s) nextsymbol();
else {
register enum errort e;
switch(s) {
case SYM_SEMICOLON: e = ER_NOSEMICOLON;
break;
case SYM_RPARENTHESIS: e = ER_NORPAR;
break;
case SYM_IDENTIFIER: e = ER_NOIDENT;
break;
case SYM_LPARENTHESIS: e = ER_NOLPAR;
break;
case SYM_COMMA: e = ER_NOCOMMA;
break;
case SYM_LBRACKET: e = ER_NOLBRAK;
break;
case SYM_RBRACKET: e = ER_NORBRAK;
break;
case SYM_STRING: e = ER_NOSTRING;
break;
default: e = ER_SYNTAX;
}