/* output.c - output and error handling for bcc */

/* Copyright (C) 1992 Bruce Evans */

#include "bcc.h"
#include "input.h"
#include "os.h"
#include "sizes.h"
#include "table.h"

#undef EXTERN
#define EXTERN
#include "output.h"

#ifdef XENIX_AS
# define HEXSTARTCHAR '/'
#else
# define HEXSTARTCHAR '$'
#endif
#define OUTBUFSIZE 2048
#define opcodeleadin()		/* outtab() for fussy assemblers */

PRIVATE unsigned errcount;	/* # errors in compilation */
				/* depends on zero init */
PRIVATE char hexdigits[] = "0123456789ABCDEF";
PRIVATE char *outbuf;
EXTERN char *outbufend;		/* end of pair of output buffers */
PRIVATE char *outbufmid;
PRIVATE fd_t output;
PRIVATE fastin_t outstage;	/* depends on zero init */

FORWARD void errorsummary P((void));
FORWARD void errsum1 P((void));
#ifdef MC6809
#ifdef DEBUG
FORWARD void outvaldigs P((uvalue_t num));
#endif
#endif

PUBLIC void bugerror(message)
char *message;
{
    error2error("compiler bug - ", message);
}

PUBLIC void closeout()
{
    char *saveoutptr;

    if (outstage == 3)
    {
	saveoutptr = outbufptr;
	flushout();		/* buffer from last stage */
	outbufptr = saveoutptr;
    }
    outstage = 0;		/* flush from top to current ptr */
    flushout();
    close(output);
}

/* error handler */

PUBLIC void error(message)
char *message;
{
    error2error(message, "");
}

/* error handler - concatenate 2 messages */

PUBLIC void error2error(message1, message2)
char *message1;
char *message2;
{
    char *warning;

    if (message1[0] == '%' && message1[1] == 'w')
    {
	message1 += 2;
	warning = "warning: ";
    }
    else
    {
	++errcount;
	warning = "error: ";
    }
    if (output != 1)
    {
	char *old_outbuf;
	char *old_outbufptr;
	char *old_outbuftop;
	fd_t old_output;
	fastin_t old_outstage;
	char smallbuf[81];	/* don't use heap - might be full or busy */

	old_outbuf = outbuf;
	old_outbufptr = outbufptr;
	old_outbuftop = outbuftop;
	old_output = output;
	old_outstage = outstage;

	outbufptr = outbuf = &smallbuf[0];
	outbuftop = &smallbuf[sizeof smallbuf];
	output = 1;
	outstage = 0;
	errorloc();
	outstr(warning);
	outstr(message1);
	outstr(message2);
	outnl();
	flushout();

	outbuf = old_outbuf;
	outbufptr = old_outbufptr;
	outbuftop = old_outbuftop;
	output = old_output;
	outstage = old_outstage;
    }
    comment();
    errorloc();
    outstr(warning);
    outstr(message1);
    outstr(message2);
    outnl();
}

/* summarise errors */

PRIVATE void errorsummary()
{
    if (errcount != 0)
    {
	outfail();
	errsum1();
    }
    outnl();
    comment();
    errsum1();
}

PRIVATE void errsum1()
{
    outudec(errcount);
    outnstr(" errors detected");
}

/* fatal error, exit early */

PUBLIC void fatalerror(message)
char *message;
{
    error(message);
    finishup();
}

/* finish up compile */

PUBLIC void finishup()
{
    if (!orig_cppmode)
    {
	if (watchlc)
	{
	    cseg();
	    outop0str("if *-.program.start-");
	    outnhex(getlc());
	    outfail();
	    outnstr("phase error");
	    outop0str("endif\n");
	}
#ifdef HOLDSTRINGS
	dumpstrings();
#endif
	dumpglbs();
	errorsummary();
    }
    closein();
    closeout();
    exit(errcount == 0 ? 0 : 1);
}

/* flush output file */

PUBLIC void flushout()
{
    unsigned nbytes;

    switch (outstage)
    {
    case 0:
	nbytes = (unsigned) (outbufptr - outbuf);
	outbufptr = outbuf;
	break;
    case 2:
	nbytes = OUTBUFSIZE;
	outbufptr = outbuf;
	outbuftop = outbufmid;
	outstage = 3;
	break;
    default:
	nbytes = OUTBUFSIZE;
	if (outstage == 1)
	    nbytes = 0;
	outbufptr = outbufmid;
	outbuftop = outbufend;
	outstage = 2;
	break;
    }
    if (nbytes != 0)
    {
	if (!orig_cppmode)
	    clearlabels(outbufptr, outbufptr + nbytes);
	if (write(output, outbufptr, nbytes) != nbytes)
	{
	    write(2, "output file error\n", 18);
	    closein();
	    close(output);
	    exit(1);
	}
    }
}

PUBLIC void initout()
{
    static char smallbuf[1];

    outbufend = outbuftop = (outbuf = outbufptr = smallbuf) + sizeof smallbuf;
    output = 1;			/* standard output */
}

PUBLIC void limiterror(message)
char *message;
{
    error2error("compiler limit exceeded - ", message);
    finishup();
}

PUBLIC void openout(oname)
char *oname;
{
    if (output != 1)
	fatalerror("more than one output file");
    if ((output = creat(oname, CREATPERMS)) < 0)
    {
	output = 1;
	fatalerror("cannot open output");
    }
}

/* print character */

PUBLIC void outbyte(c)
int c;
{
#if C_CODE || __AS09__ + __AS386_16__ + __AS386_32__ != 1
    register char *outp;

    outp = outbufptr;
    *outp++ = c;
    outbufptr = outp;
    if (outp >= outbuftop)
	flushout();
#else /* !C_CODE etc */

#if __AS09__
# asm
	TFR	X,D
	LDX	_outbufptr,PC
	STB	,X+
	STX	_outbufptr,PC
	CMPX	_outbuftop,PC
	LBHS	CALL.FLUSHOUT
# endasm
#endif /* __AS09__ */

#if __AS386_16__
# asm
# if !__FIRST_ARG_IN_AX__
	pop	dx
	pop	ax
	dec	sp
	dec	sp
# else
#  if ARGREG != DREG
	xchg	ax,bx
#  endif
# endif
	mov	bx,[_outbufptr]
	mov	[bx],al
	inc	bx
	mov	[_outbufptr],bx
	cmp	bx,[_outbuftop]
	jae	Outbyte.Flush
# if !__FIRST_ARG_IN_AX__
	jmp	dx
# else
	ret
# endif

Outbyte.Flush:
# if !__FIRST_ARG_IN_AX__
	push	dx
# endif
	br	_flushout
# endasm
#endif /* __AS386_16__ */

#if __AS386_32__
# asm
# if !__FIRST_ARG_IN_AX__
	mov	eax,_outbyte.c[esp]
# else
#  if ARGREG != DREG
	xchg	eax,ebx
#  endif
# endif
	mov	ecx,[_outbufptr]
	mov	[ecx],al
	inc	ecx
	mov	[_outbufptr],ecx
	cmp	ecx,[_outbuftop]
	jae	Outbyte.Flush
	ret

Outbyte.Flush:
	br	_flushout
# endasm
#endif /* __AS386_32__ */
#endif /* C_CODE etc */
}

/* print comma */

PUBLIC void outcomma()
{
    outbyte(',');
}

/* print line number in format ("# %u \"%s\"%s", nr, fname, str) */

PUBLIC void outcpplinenumber(nr, fname, str)
unsigned nr;
char *fname;
char *str;
{
    outstr("# ");
    outudec(nr);
    outstr(" \"");
    outstr(fname);
    outstr("\"");
    outnstr(str);
}

/* print unsigned offset, hex format */

PUBLIC void outhex(num)
uoffset_t num;
{
#ifdef HEXSTARTCHAR
    if (num >= 10)
	outbyte(HEXSTARTCHAR);
#endif
    outhexdigs(num);
#ifdef HEXENDCHAR
    if (num >= 10)
	outbyte(HEXENDCHAR);
#endif
}

/* print unsigned offset, hex format with digits only (no hex designator) */

PUBLIC void outhexdigs(num)
register uoffset_t num;
{
    if (num >= 0x10)
    {
	outhexdigs(num / 0x10);
	num %= 0x10;
    }
    outbyte(hexdigits[(int) num]);
}

/* print string terminated by EOL */

PUBLIC void outline(s)
char *s;
{
    register char *outp;
    register char *rs;

    outp = outbufptr;
    rs = s;
#ifdef COEOL
    if (*rs == COEOL)
	++rs;
#endif
    do
    {
	*outp++ = *rs;
	if (outp >= outbuftop)
	{
	    outbufptr = outp;
	    flushout();
	    outp = outbufptr;
	}
    }
    while (*rs++ != EOL);
    outbufptr = outp;
#ifdef COEOL
    if (*rs == COEOL)
	outbyte(COEOL);
#endif
}

/* print minus sign */

PUBLIC void outminus()
{
    outbyte('-');
}

/* print character, then newline */

PUBLIC void outnbyte(byte)
int byte;
{
    outbyte(byte);
    outnl();
}

/* print unsigned offset, hex format, then newline */

PUBLIC void outnhex(num)
uoffset_t num;
{
    outhex(num);
    outnl();
}

/* print newline */

PUBLIC void outnl()
{
    if (watchlc)
    {
	outtab();
	comment();
	outhex(getlc());
    }
    outbyte('\n');
}

/* print opcode and newline, bump lc by 1 */

PUBLIC void outnop1str(s)
char *s;
{
    opcodeleadin();
    outstr(s);
    bumplc();
    outnl();
}

/* print opcode and newline, bump lc by 2 */

PUBLIC void outnop2str(s)
char *s;
{
    opcodeleadin();
    outstr(s);
    bumplc2();
    outnl();
}

/* print string, then newline */

PUBLIC void outnstr(s)
char *s;
{
    outstr(s);
    outnl();
}

/* print opcode */

PUBLIC void outop0str(s)
char *s;
{
    opcodeleadin();
    outstr(s);
}

/* print opcode, bump lc by 1 */

PUBLIC void outop1str(s)
char *s;
{
    opcodeleadin();
    outstr(s);
    bumplc();
}

/* print opcode, bump lc by 2 */

PUBLIC void outop2str(s)
char *s;
{
    opcodeleadin();
    outstr(s);
    bumplc2();
}

/* print opcode, bump lc by 3 */

PUBLIC void outop3str(s)
char *s;
{
    opcodeleadin();
    outstr(s);
    bumplc3();
}

/* print plus sign */

PUBLIC void outplus()
{
    outbyte('+');
}

/* print signed offset, hex format */

PUBLIC void outshex(num)
offset_t num;
{
    if (num >= -(maxoffsetto + 1))
    {
	outminus();
	num = -num;
    }
    outhex((uoffset_t) num);
}

/* print string  */

PUBLIC void outstr(s)
char *s;
{
#if C_CODE || __AS09__ + __AS386_16__ + __AS386_32__ != 1
    register char *outp;
    register char *rs;

    outp = outbufptr;
    rs = s;
    while (*rs)
    {
	*outp++ = *rs++;
	if (outp >= outbuftop)
	{
	    outbufptr = outp;
	    flushout();
	    outp = outbufptr;
	}
    }
    outbufptr = outp;
#else /* !C_CODE etc */

#if __AS09__
# asm
	LEAU	,X
	LDX	_outbuftop,PC
	PSHS	X
	LDX	_outbufptr,PC
	BRA	OUTSTR.NEXT

CALL.FLUSHOUT
	PSHS	U,B
	STX	_outbufptr,PC
	LBSR	_flushout
	LDX	_outbufptr,PC
	LDY	_outbuftop,PC
	PULS	B,U,PC

OUTSTR.LOOP
	STB	,X+
	CMPX	,S
	BLO	OUTSTR.NEXT
	BSR	CALL.FLUSHOUT
	STY	,S
OUTSTR.NEXT
	LDB	,U+
	BNE	OUTSTR.LOOP
	STX	_outbufptr,PC
	LEAS	2,S
# endasm
#endif /* __AS09__ */

#if __AS386_16__
# asm
# if !__CALLER_SAVES__
	mov	dx,di
	mov	cx,si
# endif
# if !__FIRST_ARG_IN_AX__
	pop	ax
	pop	si
	dec	sp
	dec	sp
	push	ax
# else
#  if ARGREG == DREG
	xchg	si,ax
#  else
	mov	si,bx
#  endif
# endif
	mov	di,[_outbufptr]
	mov	bx,[_outbuftop]
	br	OUTSTR.NEXT

CALL.FLUSHOUT:
	push	si
# if !__CALLER_SAVES__
	push	dx
	push	cx
# endif
	push	ax
	mov	[_outbufptr],di
	call	_flushout
	mov	di,[_outbufptr]
	mov	bx,[_outbuftop]
	pop	ax
# if !__CALLER_SAVES__
	pop	cx
	pop	dx
#endif
	pop	si
	ret

OUTSTR.LOOP:
	stosb
	cmp	di,bx
	jb	OUTSTR.NEXT
	call	CALL.FLUSHOUT
OUTSTR.NEXT:
	lodsb
	test	al,al
	jne	OUTSTR.LOOP
	mov	[_outbufptr],di
# if !__CALLER_SAVES__
	mov	si,cx
	mov	di,dx
# endif
# endasm
#endif /* __AS386_16__ */

#if __AS386_32__
# asm
# if !__CALLER_SAVES__
	mov	edx,edi
	push	esi
#  define TEMPS 4
# else
#  define TEMPS 0
# endif
# if !__FIRST_ARG_IN_AX__
	mov	esi,TEMPS+_outstr.s[esp]
# else
#  if ARGREG == DREG
	xchg	esi,eax
#  else
	mov	esi,ebx
#  endif
# endif
	mov	edi,[_outbufptr]
	mov	ecx,[_outbuftop]
	br	OUTSTR.NEXT

CALL.FLUSHOUT:
	push	esi
# if !__CALLER_SAVES__
	push	edx
# endif
	push	eax
	mov	[_outbufptr],edi
	call	_flushout
	mov	edi,[_outbufptr]
	mov	ecx,[_outbuftop]
	pop	eax
# if !__CALLER_SAVES__
	pop	edx
# endif
	pop	esi
	ret

OUTSTR.LOOP:
	stosb
	cmp	edi,ecx
	jb	OUTSTR.NEXT
	call	CALL.FLUSHOUT
OUTSTR.NEXT:
	lodsb
	test	al,al
	jne	OUTSTR.LOOP
	mov	[_outbufptr],edi
# if !__CALLER_SAVES__
	pop	esi
	mov	edi,edx
# endif
# endasm
#endif /* __AS386_32__ */
#endif /* C_CODE etc */
}

/* print tab */

PUBLIC void outtab()
{
    outbyte('\t');
}

/* print unsigned, decimal format */

PUBLIC void outudec(num)
unsigned num;
{
    char str[10 + 1];

    str[sizeof str - 1] = 0;
    outstr(pushudec(str + sizeof str - 1, num));
}

#ifdef MC6809
#ifdef DEBUG

/* print unsigned value, hex format (like outhex except value_t is larger) */

PUBLIC void outuvalue(num)
uvalue_t num;
{
#ifdef HEXSTARTCHAR
    if (num >= 10)
	outbyte(HEXSTARTCHAR);
#endif
    outvaldigs(num);
#ifdef HEXENDCHAR
    if (num >= 10)
	outbyte(HEXENDCHAR);
#endif
}

/* print unsigned value, hex format with digits only (no hex designator) */

PRIVATE void outvaldigs(num)
register uvalue_t num;
{
    if (num >= 0x10)
    {
	outvaldigs(num / 0x10);
	num %= 0x10;
    }
    outbyte(hexdigits[(fastin_t) num]);
}

/* print signed value, hex format (like outshex except value_t is larger) */

PUBLIC void outvalue(num)
register value_t num;
{
    if (num < 0)
    {
	outminus();
	num = -num;
    }
    outuvalue((uoffset_t) num);
}

#endif /* DEBUG */
#endif /* MC6809 */

/* push decimal digits of an unsigned onto a stack of chars */

PUBLIC char *pushudec(s, num)
register char *s;
register unsigned num;
{
    register unsigned reduction;

    while (num >= 10)
    {
	reduction = num / 10;
	*--s = num - 10 * reduction + '0';
	num = reduction;
    }
    *--s = num + '0';
    return s;
}

PUBLIC void setoutbufs()
{
    if (!isatty(output))
    {
	outbufptr = outbuf = ourmalloc(2 * OUTBUFSIZE);
#ifdef TS
ts_s_outputbuf += 2 * OUTBUFSIZE;
#endif
	outbufmid = outbuftop = outbufptr + OUTBUFSIZE;
	outbufend = outbufmid + OUTBUFSIZE;
	outstage = 1;
    }
    if (watchlc)
	outnstr(".program.start:\n");	/* kludge temp label */
}