/* fmtdump.c -- compile format file and dump out instructions
 *
 * This code is Copyright (c) 2002, by the authors of nmh.  See the
 * COPYRIGHT file in the root directory of the nmh distribution for
 * complete copyright information.
 */

#include <h/mh.h>
#include <h/fmt_scan.h>
#include <h/fmt_compile.h>
#include <h/scansbr.h>
#include <h/utils.h>

#define FMTDUMP_SWITCHES \
    X("form formatfile", 0, FORMSW) \
    X("format string", 5, FMTSW) \
    X("version", 0, VERSIONSW) \
    X("help", 0, HELPSW) \

#define X(sw, minchars, id) id,
DEFINE_SWITCH_ENUM(FMTDUMP);
#undef X

#define X(sw, minchars, id) { sw, minchars, id },
DEFINE_SWITCH_ARRAY(FMTDUMP, switches);
#undef X

/* for assignlabel */
static struct format *lvec[128];
static int lused = 0;

/*
 * static prototypes
 */
static void fmt_dump (struct format *);
static void dumpone(struct format *);
static int findlabel(struct format *);
static void assignlabel(struct format *);
static char *f_typestr(int);
static char *c_typestr(int);
static char *c_flagsstr(int);
static void litputs(char *);
static void litputc(char);


int
main (int argc, char **argv)
{
    char *cp, *form = NULL, *format = NULL;
    char buf[BUFSIZ], *nfs, **argp, **arguments;
    struct format *fmt;

    if (nmh_init(argv[0], 2)) { return 1; }

    arguments = getarguments (invo_name, argc, argv, 1);
    argp = arguments;

    while ((cp = *argp++)) {
	if (*cp == '-') {
	    switch (smatch (++cp, switches)) {
		case AMBIGSW: 
		    ambigsw (cp, switches);
		    done (1);
		case UNKWNSW: 
		    adios (NULL, "-%s unknown", cp);

		case HELPSW: 
		    snprintf (buf, sizeof(buf), "%s [switches]", invo_name);
		    print_help (buf, switches, 1);
		    done (0);
		case VERSIONSW:
		    print_version(invo_name);
		    done (0);

		case FORMSW: 
		    if (!(form = *argp++) || *form == '-')
			adios (NULL, "missing argument to %s", argp[-2]);
		    format = NULL;
		    continue;
		case FMTSW: 
		    if (!(format = *argp++) || *format == '-')
			adios (NULL, "missing argument to %s", argp[-2]);
		    form = NULL;
		    continue;

	    }
	}
	if (form)
	    adios (NULL, "only one form at a time!");
        form = cp;
    }

    /*
     * Get new format string.  Must be before chdir().
     */
    nfs = new_fs (form, format, FORMAT);
    (void) fmt_compile(nfs, &fmt, 1);

    fmt_dump(fmt);

    fmt_free(fmt, 1);

    done(0);
    return 1;
}

static void
fmt_dump (struct format *fmth)
{
	int i;
	struct format *fmt, *addr;

	/* Assign labels */
	for (fmt = fmth; fmt; ++fmt) {
		i = fmt->f_type;
		if (i == FT_IF_S ||
		    i == FT_IF_S_NULL ||
		    i == FT_IF_V_EQ ||
		    i == FT_IF_V_NE ||
		    i == FT_IF_V_GT ||
		    i == FT_IF_MATCH ||
		    i == FT_IF_AMATCH ||
		    i == FT_GOTO) {
			addr = fmt + fmt->f_skip;
			if (findlabel(addr) < 0)
				assignlabel(addr);
		}
		if (fmt->f_type == FT_DONE && fmt->f_value == 0)
			break;
	}

	/* Dump them out! */
	for (fmt = fmth; fmt; ++fmt) {
		dumpone(fmt);
		if (fmt->f_type == FT_DONE && fmt->f_value == 0)
			break;
	}
}

static void
dumpone(struct format *fmt)
{
	int i;

	if ((i = findlabel(fmt)) >= 0)
		printf("L%d:", i);
	putchar('\t');

	fputs(f_typestr((int)fmt->f_type), stdout);

	switch (fmt->f_type) {

	case FT_COMP:
	case FT_LS_COMP:
	case FT_LV_COMPFLAG:
	case FT_LV_COMP:
		printf(", comp ");
		litputs(fmt->f_comp->c_name);
		if (fmt->f_comp->c_type)
			printf(", c_type %s", c_typestr(fmt->f_comp->c_type));
		if (fmt->f_comp->c_flags)
			printf(", c_flags %s", c_flagsstr(fmt->f_comp->c_flags));
		break;

	case FT_LV_SEC:
	case FT_LV_MIN:
	case FT_LV_HOUR:
	case FT_LV_MDAY:
	case FT_LV_MON:
	case FT_LS_MONTH:
	case FT_LS_LMONTH:
	case FT_LS_ZONE:
	case FT_LV_YEAR:
	case FT_LV_WDAY:
	case FT_LS_DAY:
	case FT_LS_WEEKDAY:
	case FT_LV_YDAY:
	case FT_LV_ZONE:
	case FT_LV_CLOCK:
	case FT_LV_RCLOCK:
	case FT_LV_DAYF:
	case FT_LV_ZONEF:
	case FT_LV_DST:
	case FT_LS_822DATE:
	case FT_LS_PRETTY:
	case FT_LOCALDATE:
	case FT_GMTDATE:
	case FT_PARSEDATE:
		printf(", c_name ");
		litputs(fmt->f_comp->c_name);
		if (fmt->f_comp->c_type)
			printf(", c_type %s", c_typestr(fmt->f_comp->c_type));
		if (fmt->f_comp->c_flags)
			printf(", c_flags %s", c_flagsstr(fmt->f_comp->c_flags));
		break;

	case FT_LS_ADDR:
	case FT_LS_PERS:
	case FT_LS_MBOX:
	case FT_LS_HOST:
	case FT_LS_PATH:
	case FT_LS_GNAME:
	case FT_LS_NOTE:
	case FT_LS_822ADDR:
	case FT_LV_HOSTTYPE:
	case FT_LV_INGRPF:
	case FT_LV_NOHOSTF:
	case FT_LS_FRIENDLY:
	case FT_PARSEADDR:
	case FT_MYMBOX:
	case FT_GETMYMBOX:
	case FT_GETMYADDR:
		printf(", c_name ");
		litputs(fmt->f_comp->c_name);
		if (fmt->f_comp->c_type)
			printf(", c_type %s", c_typestr(fmt->f_comp->c_type));
		if (fmt->f_comp->c_flags)
			printf(", c_flags %s", c_flagsstr(fmt->f_comp->c_flags));
		break;

	case FT_COMPF:
		printf(", width %d, fill '", fmt->f_width);
		litputc(fmt->f_fill);
		printf("' name ");
		litputs(fmt->f_comp->c_name);
		if (fmt->f_comp->c_type)
			printf(", c_type %s", c_typestr(fmt->f_comp->c_type));
		if (fmt->f_comp->c_flags)
			printf(", c_flags %s", c_flagsstr(fmt->f_comp->c_flags));
		break;

	case FT_STRF:
	case FT_NUMF:
		printf(", width %d, fill '", fmt->f_width);
		litputc(fmt->f_fill);
		putchar('\'');
		break;

	case FT_LIT:
		putchar(' ');
		litputs(fmt->f_text);
		break;

	case FT_LITF:
		printf(", width %d, fill '", fmt->f_width);
		litputc(fmt->f_fill);
		printf("' ");
		litputs(fmt->f_text);
		break;

	case FT_CHAR:
		putchar(' ');
		putchar('\'');
		litputc(fmt->f_char);
		putchar('\'');
		break;


	case FT_IF_S:
	case FT_IF_S_NULL:
	case FT_IF_MATCH:
	case FT_IF_AMATCH:
		printf(" continue else goto");
		/* FALLTHRU */
	case FT_GOTO:
		i = findlabel(fmt + fmt->f_skip);
		printf(" L%d", i);
		break;

	case FT_IF_V_EQ:
	case FT_IF_V_NE:
	case FT_IF_V_GT:
		i = findlabel(fmt + fmt->f_skip);
		printf(" %d continue else goto L%d", fmt->f_value, i);
		break;

	case FT_V_EQ:
	case FT_V_NE:
	case FT_V_GT:
	case FT_LV_LIT:
	case FT_LV_PLUS_L:
	case FT_LV_MINUS_L:
	case FT_LV_MULTIPLY_L:
	case FT_LV_DIVIDE_L:
	case FT_LV_MODULO_L:
		printf(" value %d", fmt->f_value);
		break;

	case FT_LS_LIT:
		printf(" str ");
		litputs(fmt->f_text);
		break;

	case FT_LS_GETENV:
		printf(" getenv ");
		litputs(fmt->f_text);
		break;

	case FT_LS_DECODECOMP:
		printf(", comp ");
		litputs(fmt->f_comp->c_name);
		break;

	case FT_LS_DECODE:
		break;

	case FT_LS_TRIM:
		printf(", width %d", fmt->f_width);
		break;

	case FT_LV_DAT:
		printf(", value dat[%d]", fmt->f_value);
		break;
	}
	putchar('\n');
}

static int
findlabel(struct format *addr)
{
	int i;

	for (i = 0; i < lused; ++i)
		if (addr == lvec[i])
			return(i);
	return(-1);
}

static void
assignlabel(struct format *addr)
{
	lvec[lused++] = addr;
}

static char *
f_typestr(int t)
{
	static char buf[32];

	switch (t) {
	case FT_COMP: return "COMP";
	case FT_COMPF: return "COMPF";
	case FT_LIT: return "LIT";
	case FT_LITF: return "LITF";
	case FT_CHAR: return "CHAR";
	case FT_NUM: return "NUM";
	case FT_NUMF: return "NUMF";
	case FT_STR: return "STR";
	case FT_STRF: return "STRF";
	case FT_STRFW: return "STRFW";
	case FT_STRLIT: return "STRLIT";
	case FT_STRLITZ: return "STRLITZ";
	case FT_PUTADDR: return "PUTADDR";
	case FT_LS_COMP: return "LS_COMP";
	case FT_LS_LIT: return "LS_LIT";
	case FT_LS_GETENV: return "LS_GETENV";
	case FT_LS_CFIND: return "LS_CFIND";
	case FT_LS_DECODECOMP: return "LS_DECODECOMP";
	case FT_LS_DECODE: return "LS_DECODE";
	case FT_LS_TRIM: return "LS_TRIM";
	case FT_LV_COMP: return "LV_COMP";
	case FT_LV_COMPFLAG: return "LV_COMPFLAG";
	case FT_LV_LIT: return "LV_LIT";
	case FT_LV_DAT: return "LV_DAT";
	case FT_LV_STRLEN: return "LV_STRLEN";
	case FT_LV_PLUS_L: return "LV_PLUS_L";
	case FT_LV_MINUS_L: return "LV_MINUS_L";
	case FT_LV_MULTIPLY_L: return "LV_MULTIPLY_L";
	case FT_LV_DIVIDE_L: return "LV_DIVIDE_L";
	case FT_LV_MODULO_L: return "LV_MODULO_L";
	case FT_LV_CHAR_LEFT: return "LV_CHAR_LEFT";
	case FT_LS_MONTH: return "LS_MONTH";
	case FT_LS_LMONTH: return "LS_LMONTH";
	case FT_LS_ZONE: return "LS_ZONE";
	case FT_LS_DAY: return "LS_DAY";
	case FT_LS_WEEKDAY: return "LS_WEEKDAY";
	case FT_LS_822DATE: return "LS_822DATE";
	case FT_LS_PRETTY: return "LS_PRETTY";
	case FT_LS_KILO: return "LS_KILO";
	case FT_LS_KIBI: return "LS_KIBI";
	case FT_LV_SEC: return "LV_SEC";
	case FT_LV_MIN: return "LV_MIN";
	case FT_LV_HOUR: return "LV_HOUR";
	case FT_LV_MDAY: return "LV_MDAY";
	case FT_LV_MON: return "LV_MON";
	case FT_LV_YEAR: return "LV_YEAR";
	case FT_LV_YDAY: return "LV_YDAY";
	case FT_LV_WDAY: return "LV_WDAY";
	case FT_LV_ZONE: return "LV_ZONE";
	case FT_LV_CLOCK: return "LV_CLOCK";
	case FT_LV_RCLOCK: return "LV_RCLOCK";
	case FT_LV_DAYF: return "LV_DAYF";
	case FT_LV_DST: return "LV_DST";
	case FT_LV_ZONEF: return "LV_ZONEF";
	case FT_LS_PERS: return "LS_PERS";
	case FT_LS_MBOX: return "LS_MBOX";
	case FT_LS_HOST: return "LS_HOST";
	case FT_LS_PATH: return "LS_PATH";
	case FT_LS_GNAME: return "LS_GNAME";
	case FT_LS_NOTE: return "LS_NOTE";
	case FT_LS_ADDR: return "LS_ADDR";
	case FT_LS_822ADDR: return "LS_822ADDR";
	case FT_LS_FRIENDLY: return "LS_FRIENDLY";
	case FT_LV_HOSTTYPE: return "LV_HOSTTYPE";
	case FT_LV_INGRPF: return "LV_INGRPF";
	case FT_LS_UNQUOTE: return "LS_UNQUOTE";
	case FT_LV_NOHOSTF: return "LV_NOHOSTF";
	case FT_LOCALDATE: return "LOCALDATE";
	case FT_GMTDATE: return "GMTDATE";
	case FT_PARSEDATE: return "PARSEDATE";
	case FT_PARSEADDR: return "PARSEADDR";
	case FT_FORMATADDR: return "FORMATADDR";
	case FT_CONCATADDR: return "CONCATADDR";
	case FT_MYMBOX: return "MYMBOX";
	case FT_GETMYMBOX: return "GETMYMBOX";
	case FT_GETMYADDR: return "GETMYADDR";
	case FT_SAVESTR: return "SAVESTR";
	case FT_DONE: return "DONE";
	case FT_PAUSE: return "PAUSE";
	case FT_NOP: return "NOP";
	case FT_GOTO: return "GOTO";
	case FT_IF_S_NULL: return "IF_S_NULL";
	case FT_IF_S: return "IF_S";
	case FT_IF_V_EQ: return "IF_V_EQ";
	case FT_IF_V_NE: return "IF_V_NE";
	case FT_IF_V_GT: return "IF_V_GT";
	case FT_IF_MATCH: return "IF_MATCH";
	case FT_IF_AMATCH: return "IF_AMATCH";
	case FT_S_NULL: return "S_NULL";
	case FT_S_NONNULL: return "S_NONNULL";
	case FT_V_EQ: return "V_EQ";
	case FT_V_NE: return "V_NE";
	case FT_V_GT: return "V_GT";
	case FT_V_MATCH: return "V_MATCH";
	case FT_V_AMATCH: return "V_AMATCH";
	default:
                snprintf(buf, sizeof buf, "/* ??? #%d */", t);
		return(buf);
	}
}

#define FNORD(v, s) if (t & (v)) { \
	if (i++ > 0) \
		strcat(buf, "|"); \
	strcat(buf, s); }

static char *
c_typestr(int t)
{
	int i;
	static char buf[64];

	buf[0] = '\0';
	if (t & ~(CT_ADDR|CT_DATE))
                snprintf(buf, sizeof buf, "0x%x ", t);
	strcat(buf, "<");
	i = 0;
	FNORD(CT_ADDR, "ADDR");
	FNORD(CT_DATE, "DATE");
	strcat(buf, ">");
	return(buf);
}

static char *
c_flagsstr(int t)
{
	int i;
	static char buf[64];

	buf[0] = '\0';
	if (t & ~(CF_TRUE|CF_PARSED|CF_DATEFAB|CF_TRIMMED))
                snprintf(buf, sizeof buf, "0x%x ", t);
	strcat(buf, "<");
	i = 0;
	FNORD(CF_TRUE, "TRUE");
	FNORD(CF_PARSED, "PARSED");
	FNORD(CF_DATEFAB, "DATEFAB");
	FNORD(CF_TRIMMED, "TRIMMED");
	strcat(buf, ">");
	return(buf);
}
#undef FNORD

static void
litputs(char *s)
{
	if (s) {
		putchar('"');
		while (*s)
			litputc(*s++);
		putchar('"');
	} else
		fputs("<nil>", stdout);
}

static void
litputc(char c)
{
	if (c & ~ 0177) {
		putchar('M');
		putchar('-');
		c &= 0177;
	}
	if (c < 0x20 || c == 0177) {
		if (c == '\b') {
			putchar('\\');
			putchar('b');
		} else if (c == '\f') {
			putchar('\\');
			putchar('f');
		} else if (c == '\n') {
			putchar('\\');
			putchar('n');
		} else if (c == '\r') {
			putchar('\\');
			putchar('r');
		} else if (c == '\t') {
			putchar('\\');
			putchar('t');
		} else {
			putchar('^');
			putchar(c ^ 0x40);	/* DEL to ?, others to alpha */
		}
	} else
		putchar(c);
}