infocmp.c

ncurses 库 可能有用酒用 没用就算了 我觉得还可以用

/****************************************************************************
 * Copyright (c) 1998-2004,2005 Free Software Foundation, Inc.              *
 *                                                                          *
 * Permission is hereby granted, free of charge, to any person obtaining a  *
 * copy of this software and associated documentation files (the            *
 * "Software"), to deal in the Software without restriction, including      *
 * without limitation the rights to use, copy, modify, merge, publish,      *
 * distribute, distribute with modifications, sublicense, and/or sell       *
 * copies of the Software, and to permit persons to whom the Software is    *
 * furnished to do so, subject to the following conditions:                 *
 *                                                                          *
 * The above copyright notice and this permission notice shall be included  *
 * in all copies or substantial portions of the Software.                   *
 *                                                                          *
 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS  *
 * OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF               *
 * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.   *
 * IN NO EVENT SHALL THE ABOVE COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM,   *
 * DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR    *
 * OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR    *
 * THE USE OR OTHER DEALINGS IN THE SOFTWARE.                               *
 *                                                                          *
 * Except as contained in this notice, the name(s) of the above copyright   *
 * holders shall not be used in advertising or otherwise to promote the     *
 * sale, use or other dealings in this Software without prior written       *
 * authorization.                                                           *
 ****************************************************************************/

/****************************************************************************
 *  Author: Zeyd M. Ben-Halim <[e-mail]> 1992,1995               *
 *     and: Eric S. Raymond <[e-mail]>                         *
 *     and: Thomas E. Dickey                        1996-on                 *
 ****************************************************************************/

/*
 *	infocmp.c -- decompile an entry, or compare two entries
 *		written by Eric S. Raymond
 */

#include <progs.priv.h>

#include <dump_entry.h>

MODULE_ID("$Id: infocmp.c,v 1.79 2005/09/25 00:39:43 tom Exp $")

#define L_CURL "{"
#define R_CURL "}"

#define MAXTERMS	32	/* max # terminal arguments we can handle */
#define MAX_STRING	1024	/* maximum formatted string */

const char *_nc_progname = "infocmp";

typedef char path[PATH_MAX];

/***************************************************************************
 *
 * The following control variables, together with the contents of the
 * terminfo entries, completely determine the actions of the program.
 *
 ***************************************************************************/

static char *tname[MAXTERMS];	/* terminal type names */
static ENTRY entries[MAXTERMS];	/* terminfo entries */
static int termcount;		/* count of terminal entries */

static bool limited = TRUE;	/* "-r" option is not set */
static bool quiet = FALSE;
static bool literal = FALSE;
static const char *bool_sep = ":";
static const char *s_absent = "NULL";
static const char *s_cancel = "NULL";
static const char *tversion;	/* terminfo version selected */
static int itrace;		/* trace flag for debugging */
static int mwidth = 60;
static int numbers = 0;		/* format "%'char'" to/from "%{number}" */
static int outform = F_TERMINFO;	/* output format */
static int sortmode;		/* sort_mode */

/* main comparison mode */
static int compare;
#define C_DEFAULT	0	/* don't force comparison mode */
#define C_DIFFERENCE	1	/* list differences between two terminals */
#define C_COMMON	2	/* list common capabilities */
#define C_NAND		3	/* list capabilities in neither terminal */
#define C_USEALL	4	/* generate relative use-form entry */
static bool ignorepads;		/* ignore pad prefixes when diffing */

#if NO_LEAKS
#undef ExitProgram
static void ExitProgram(int code) GCC_NORETURN;
/* prototype is to get gcc to accept the noreturn attribute */
static void
ExitProgram(int code)
{
    while (termcount-- > 0)
	_nc_free_termtype(&entries[termcount].tterm);
    _nc_leaks_dump_entry();
    _nc_free_and_exit(code);
}
#endif

static char *
canonical_name(char *ptr, char *buf)
/* extract the terminal type's primary name */
{
    char *bp;

    (void) strcpy(buf, ptr);
    if ((bp = strchr(buf, '|')) != 0)
	*bp = '\0';

    return (buf);
}

/***************************************************************************
 *
 * Predicates for dump function
 *
 ***************************************************************************/

static int
capcmp(PredIdx idx, const char *s, const char *t)
/* capability comparison function */
{
    if (!VALID_STRING(s) && !VALID_STRING(t))
	return (s != t);
    else if (!VALID_STRING(s) || !VALID_STRING(t))
	return (1);

    if ((idx == acs_chars_index) || !ignorepads)
	return (strcmp(s, t));
    else
	return (_nc_capcmp(s, t));
}

static int
use_predicate(unsigned type, PredIdx idx)
/* predicate function to use for use decompilation */
{
    ENTRY *ep;

    switch (type) {
    case BOOLEAN:
	{
	    int is_set = FALSE;

	    /*
	     * This assumes that multiple use entries are supposed
	     * to contribute the logical or of their boolean capabilities.
	     * This is true if we take the semantics of multiple uses to
	     * be 'each capability gets the first non-default value found
	     * in the sequence of use entries'.
	     *
	     * Note that cancelled or absent booleans are stored as FALSE,
	     * unlike numbers and strings, whose cancelled/absent state is
	     * recorded in the terminfo database.
	     */
	    for (ep = &entries[1]; ep < entries + termcount; ep++)
		if (ep->tterm.Booleans[idx] == TRUE) {
		    is_set = entries[0].tterm.Booleans[idx];
		    break;
		}
	    if (is_set != entries[0].tterm.Booleans[idx])
		return (!is_set);
	    else
		return (FAIL);
	}

    case NUMBER:
	{
	    int value = ABSENT_NUMERIC;

	    /*
	     * We take the semantics of multiple uses to be 'each
	     * capability gets the first non-default value found
	     * in the sequence of use entries'.
	     */
	    for (ep = &entries[1]; ep < entries + termcount; ep++)
		if (VALID_NUMERIC(ep->tterm.Numbers[idx])) {
		    value = ep->tterm.Numbers[idx];
		    break;
		}

	    if (value != entries[0].tterm.Numbers[idx])
		return (value != ABSENT_NUMERIC);
	    else
		return (FAIL);
	}

    case STRING:
	{
	    char *termstr, *usestr = ABSENT_STRING;

	    termstr = entries[0].tterm.Strings[idx];

	    /*
	     * We take the semantics of multiple uses to be 'each
	     * capability gets the first non-default value found
	     * in the sequence of use entries'.
	     */
	    for (ep = &entries[1]; ep < entries + termcount; ep++)
		if (ep->tterm.Strings[idx]) {
		    usestr = ep->tterm.Strings[idx];
		    break;
		}

	    if (usestr == ABSENT_STRING && termstr == ABSENT_STRING)
		return (FAIL);
	    else if (!usestr || !termstr || capcmp(idx, usestr, termstr))
		return (TRUE);
	    else
		return (FAIL);
	}
    }

    return (FALSE);		/* pacify compiler */
}

static bool
useeq(ENTRY * e1, ENTRY * e2)
/* are the use references in two entries equivalent? */
{
    int i, j;

    if (e1->nuses != e2->nuses)
	return (FALSE);

    /* Ugh...this is quadratic again */
    for (i = 0; i < e1->nuses; i++) {
	bool foundmatch = FALSE;

	/* search second entry for given use reference */
	for (j = 0; j < e2->nuses; j++)
	    if (!strcmp(e1->uses[i].name, e2->uses[j].name)) {
		foundmatch = TRUE;
		break;
	    }

	if (!foundmatch)
	    return (FALSE);
    }

    return (TRUE);
}

static bool
entryeq(TERMTYPE *t1, TERMTYPE *t2)
/* are two entries equivalent? */
{
    unsigned i;

    for (i = 0; i < NUM_BOOLEANS(t1); i++)
	if (t1->Booleans[i] != t2->Booleans[i])
	    return (FALSE);

    for (i = 0; i < NUM_NUMBERS(t1); i++)
	if (t1->Numbers[i] != t2->Numbers[i])
	    return (FALSE);

    for (i = 0; i < NUM_STRINGS(t1); i++)
	if (capcmp((PredIdx) i, t1->Strings[i], t2->Strings[i]))
	    return (FALSE);

    return (TRUE);
}

#define TIC_EXPAND(result) _nc_tic_expand(result, outform==F_TERMINFO, numbers)

static void
print_uses(ENTRY * ep, FILE *fp)
/* print an entry's use references */
{
    int i;

    if (!ep->nuses)
	fputs("NULL", fp);
    else
	for (i = 0; i < ep->nuses; i++) {
	    fputs(ep->uses[i].name, fp);
	    if (i < ep->nuses - 1)
		fputs(" ", fp);
	}
}

static const char *
dump_boolean(int val)
/* display the value of a boolean capability */
{
    switch (val) {
    case ABSENT_BOOLEAN:
	return (s_absent);
    case CANCELLED_BOOLEAN:
	return (s_cancel);
    case FALSE:
	return ("F");
    case TRUE:
	return ("T");
    default:
	return ("?");
    }
}

static void
dump_numeric(int val, char *buf)
/* display the value of a boolean capability */
{
    switch (val) {
    case ABSENT_NUMERIC:
	strcpy(buf, s_absent);
	break;
    case CANCELLED_NUMERIC:
	strcpy(buf, s_cancel);
	break;
    default:
	sprintf(buf, "%d", val);
	break;
    }
}

static void
dump_string(char *val, char *buf)
/* display the value of a string capability */
{
    if (val == ABSENT_STRING)
	strcpy(buf, s_absent);
    else if (val == CANCELLED_STRING)
	strcpy(buf, s_cancel);
    else {
	sprintf(buf, "'%.*s'", MAX_STRING - 3, TIC_EXPAND(val));
    }
}

static void
compare_predicate(PredType type, PredIdx idx, const char *name)
/* predicate function to use for entry difference reports */
{
    register ENTRY *e1 = &entries[0];
    register ENTRY *e2 = &entries[1];
    char buf1[MAX_STRING], buf2[MAX_STRING];
    int b1, b2;
    int n1, n2;
    char *s1, *s2;

    switch (type) {
    case CMP_BOOLEAN:
	b1 = e1->tterm.Booleans[idx];
	b2 = e2->tterm.Booleans[idx];
	switch (compare) {
	case C_DIFFERENCE:
	    if (!(b1 == ABSENT_BOOLEAN && b2 == ABSENT_BOOLEAN) && b1 != b2)
		(void) printf("\t%s: %s%s%s.\n",
			      name,
			      dump_boolean(b1),
			      bool_sep,
			      dump_boolean(b2));
	    break;

	case C_COMMON:
	    if (b1 == b2 && b1 != ABSENT_BOOLEAN)
		(void) printf("\t%s= %s.\n", name, dump_boolean(b1));
	    break;

	case C_NAND:
	    if (b1 == ABSENT_BOOLEAN && b2 == ABSENT_BOOLEAN)
		(void) printf("\t!%s.\n", name);
	    break;
	}
	break;

    case CMP_NUMBER:
	n1 = e1->tterm.Numbers[idx];
	n2 = e2->tterm.Numbers[idx];
	dump_numeric(n1, buf1);
	dump_numeric(n2, buf2);
	switch (compare) {
	case C_DIFFERENCE:
	    if (!((n1 == ABSENT_NUMERIC && n2 == ABSENT_NUMERIC)) && n1 != n2)
		(void) printf("\t%s: %s, %s.\n", name, buf1, buf2);
	    break;

	case C_COMMON:
	    if (n1 != ABSENT_NUMERIC && n2 != ABSENT_NUMERIC && n1 == n2)
		(void) printf("\t%s= %s.\n", name, buf1);
	    break;

	case C_NAND:
	    if (n1 == ABSENT_NUMERIC && n2 == ABSENT_NUMERIC)
		(void) printf("\t!%s.\n", name);
	    break;
	}
	break;

    case CMP_STRING:
	s1 = e1->tterm.Strings[idx];
	s2 = e2->tterm.Strings[idx];
	switch (compare) {
	case C_DIFFERENCE:
	    if (capcmp(idx, s1, s2)) {
		dump_string(s1, buf1);
		dump_string(s2, buf2);
		if (strcmp(buf1, buf2))
		    (void) printf("\t%s: %s, %s.\n", name, buf1, buf2);
	    }
	    break;

	case C_COMMON:
	    if (s1 && s2 && !capcmp(idx, s1, s2))
		(void) printf("\t%s= '%s'.\n", name, TIC_EXPAND(s1));
	    break;

	case C_NAND:
	    if (!s1 && !s2)
		(void) printf("\t!%s.\n", name);
	    break;
	}
	break;

    case CMP_USE:
	/* unlike the other modes, this compares *all* use entries */
	switch (compare) {
	case C_DIFFERENCE:
	    if (!useeq(e1, e2)) {
		(void) fputs("\tuse: ", stdout);
		print_uses(e1, stdout);
		fputs(", ", stdout);
		print_uses(e2, stdout);
		fputs(".\n", stdout);
	    }
	    break;

	case C_COMMON:
	    if (e1->nuses && e2->nuses && useeq(e1, e2)) {
		(void) fputs("\tuse: ", stdout);
		print_uses(e1, stdout);
		fputs(".\n", stdout);
	    }
	    break;

	case C_NAND:
	    if (!e1->nuses && !e2->nuses)
		(void) printf("\t!use.\n");
	    break;
	}
    }
}

/***************************************************************************
 *
 * Init string analysis
 *
 ***************************************************************************/

typedef struct {
    const char *from;
    const char *to;
} assoc;

static const assoc std_caps[] =
{
    /* these are specified by X.364 and iBCS2 */
    {"\033c", "RIS"},		/* full reset */
    {"\0337", "SC"},		/* save cursor */
    {"\0338", "RC"},		/* restore cursor */
    {"\033[r", "RSR"},		/* not an X.364 mnemonic */
    {"\033[m", "SGR0"},		/* not an X.364 mnemonic */
    {"\033[2J", "ED2"},		/* clear page */

    /* this group is specified by ISO 2022 */
    {"\033(0", "ISO DEC G0"},	/* enable DEC graphics for G0 */
    {"\033(A", "ISO UK G0"},	/* enable UK chars for G0 */
    {"\033(B", "ISO US G0"},	/* enable US chars for G0 */
    {"\033)0", "ISO DEC G1"},	/* enable DEC graphics for G1 */
    {"\033)A", "ISO UK G1"},	/* enable UK chars for G1 */
    {"\033)B", "ISO US G1"},	/* enable US chars for G1 */

    /* these are DEC private controls widely supported by emulators */
    {"\033=", "DECPAM"},	/* application keypad mode */
    {"\033>", "DECPNM"},	/* normal keypad mode */
    {"\033<", "DECANSI"},	/* enter ANSI mode */
    {"\033[!p", "DECSTR"},	/* soft reset */
    {"\033 F", "S7C1T"},	/* 7-bit controls */

    {(char *) 0, (char *) 0}
};

static const assoc std_modes[] =
/* ECMA \E[ ... [hl] modes recognized by many emulators */
{
    {"2", "AM"},		/* keyboard action mode */
    {"4", "IRM"},		/* insert/replace mode */
    {"12", "SRM"},		/* send/receive mode */
    {"20", "LNM"},		/* linefeed mode */
    {(char *) 0, (char *) 0}
};

static const assoc private_modes[] =
/* DEC \E[ ... [hl] modes recognized by many emulators */
{
    {"1", "CKM"},		/* application cursor keys */
    {"2", "ANM"},		/* set VT52 mode */
    {"3", "COLM"},		/* 132-column mode */
    {"4", "SCLM"},		/* smooth scroll */
    {"5", "SCNM"},		/* reverse video mode */
    {"6", "OM"},		/* origin mode */
    {"7", "AWM"},		/* wraparound mode */
    {"8", "ARM"},		/* auto-repeat mode */
    {(char *) 0, (char *) 0}
};

static const assoc ecma_highlights[] =
/* recognize ECMA attribute sequences */
{
    {"0", "NORMAL"},		/* normal */
    {"1", "+BOLD"},		/* bold on */
    {"2", "+DIM"},		/* dim on */
    {"3", "+ITALIC"},		/* italic on */
    {"4", "+UNDERLINE"},	/* underline on */
    {"5", "+BLINK"},		/* blink on */
    {"6", "+FASTBLINK"},	/* fastblink on */
    {"7", "+REVERSE"},		/* reverse on */
    {"8", "+INVISIBLE"},	/* invisible on */
    {"9", "+DELETED"},		/* deleted on */
    {"10", "MAIN-FONT"},	/* select primary font */
    {"11", "ALT-FONT-1"},	/* select alternate font 1 */
    {"12", "ALT-FONT-2"},	/* select alternate font 2 */
    {"13", "ALT-FONT-3"},	/* select alternate font 3 */
    {"14", "ALT-FONT-4"},	/* select alternate font 4 */
    {"15", "ALT-FONT-5"},	/* select alternate font 5 */
    {"16", "ALT-FONT-6"},	/* select alternate font 6 */
    {"17", "ALT-FONT-7"},	/* select alternate font 7 */
    {"18", "ALT-FONT-1"},	/* select alternate font 1 */
    {"19", "ALT-FONT-1"},	/* select alternate font 1 */
    {"20", "FRAKTUR"},		/* Fraktur font */
    {"21", "DOUBLEUNDER"},	/* double underline */
    {"22", "-DIM"},		/* dim off */
    {"23", "-ITALIC"},		/* italic off */
    {"24", "-UNDERLINE"},	/* underline off */
    {"25", "-BLINK"},		/* blink off */
    {"26", "-FASTBLINK"},	/* fastblink off */
    {"27", "-REVERSE"},		/* reverse off */
    {"28", "-INVISIBLE"},	/* invisible off */
    {"29", "-DELETED"},		/* deleted off */