dump_entry.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                                        *
 ****************************************************************************/

#define __INTERNAL_CAPS_VISIBLE
#include <progs.priv.h>

#include "dump_entry.h"
#include "termsort.c"		/* this C file is generated */
#include <parametrized.h>	/* so is this */

MODULE_ID("$Id: dump_entry.c,v 1.70 2005/07/23 20:03:30 tom Exp $")

#define INDENT			8
#define DISCARD(string) string = ABSENT_STRING
#define PRINTF (void) printf

typedef struct {
    char *text;
    size_t used;
    size_t size;
} DYNBUF;

static int tversion;		/* terminfo version */
static int outform;		/* output format to use */
static int sortmode;		/* sort mode to use */
static int width = 60;		/* max line width for listings */
static int column;		/* current column, limited by 'width' */
static int oldcol;		/* last value of column before wrap */
static bool pretty;		/* true if we format if-then-else strings */

static char *save_sgr;
static char *save_acsc;

static DYNBUF outbuf;
static DYNBUF tmpbuf;

/* indirection pointers for implementing sort and display modes */
static const PredIdx *bool_indirect, *num_indirect, *str_indirect;
static NCURSES_CONST char *const *bool_names;
static NCURSES_CONST char *const *num_names;
static NCURSES_CONST char *const *str_names;

static const char *separator, *trailer;

/* cover various ports and variants of terminfo */
#define V_ALLCAPS	0	/* all capabilities (SVr4, XSI, ncurses) */
#define V_SVR1		1	/* SVR1, Ultrix */
#define V_HPUX		2	/* HP/UX */
#define V_AIX		3	/* AIX */
#define V_BSD		4	/* BSD */

#if NCURSES_XNAMES
#define OBSOLETE(n) (!_nc_user_definable && (n[0] == 'O' && n[1] == 'T'))
#else
#define OBSOLETE(n) (n[0] == 'O' && n[1] == 'T')
#endif

#define isObsolete(f,n) ((f == F_TERMINFO || f == F_VARIABLE) && OBSOLETE(n))

#if NCURSES_XNAMES
#define BoolIndirect(j) ((j >= BOOLCOUNT) ? (j) : ((sortmode == S_NOSORT) ? j : bool_indirect[j]))
#define NumIndirect(j)  ((j >= NUMCOUNT)  ? (j) : ((sortmode == S_NOSORT) ? j : num_indirect[j]))
#define StrIndirect(j)  ((j >= STRCOUNT)  ? (j) : ((sortmode == S_NOSORT) ? j : str_indirect[j]))
#else
#define BoolIndirect(j) ((sortmode == S_NOSORT) ? (j) : bool_indirect[j])
#define NumIndirect(j)  ((sortmode == S_NOSORT) ? (j) : num_indirect[j])
#define StrIndirect(j)  ((sortmode == S_NOSORT) ? (j) : str_indirect[j])
#endif

static void
strncpy_DYN(DYNBUF * dst, const char *src, size_t need)
{
    size_t want = need + dst->used + 1;
    if (want > dst->size) {
	dst->size += (want + 1024);	/* be generous */
	dst->text = typeRealloc(char, dst->size, dst->text);
    }
    (void) strncpy(dst->text + dst->used, src, need);
    dst->used += need;
    dst->text[dst->used] = 0;
}

static void
strcpy_DYN(DYNBUF * dst, const char *src)
{
    if (src == 0) {
	dst->used = 0;
	strcpy_DYN(dst, "");
    } else {
	strncpy_DYN(dst, src, strlen(src));
    }
}

#if NO_LEAKS
static void
free_DYN(DYNBUF * p)
{
    if (p->text != 0)
	free(p->text);
    p->text = 0;
    p->size = 0;
    p->used = 0;
}

void
_nc_leaks_dump_entry(void)
{
    free_DYN(&outbuf);
    free_DYN(&tmpbuf);
}
#endif

NCURSES_CONST char *
nametrans(const char *name)
/* translate a capability name from termcap to terminfo */
{
    const struct name_table_entry *np;

    if ((np = _nc_find_entry(name, _nc_get_hash_table(0))) != 0)
	switch (np->nte_type) {
	case BOOLEAN:
	    if (bool_from_termcap[np->nte_index])
		return (boolcodes[np->nte_index]);
	    break;

	case NUMBER:
	    if (num_from_termcap[np->nte_index])
		return (numcodes[np->nte_index]);
	    break;

	case STRING:
	    if (str_from_termcap[np->nte_index])
		return (strcodes[np->nte_index]);
	    break;
	}

    return (0);
}

void
dump_init(const char *version, int mode, int sort, int twidth, int traceval,
	  bool formatted)
/* set up for entry display */
{
    width = twidth;
    pretty = formatted;

    /* versions */
    if (version == 0)
	tversion = V_ALLCAPS;
    else if (!strcmp(version, "SVr1") || !strcmp(version, "SVR1")
	     || !strcmp(version, "Ultrix"))
	tversion = V_SVR1;
    else if (!strcmp(version, "HP"))
	tversion = V_HPUX;
    else if (!strcmp(version, "AIX"))
	tversion = V_AIX;
    else if (!strcmp(version, "BSD"))
	tversion = V_BSD;
    else
	tversion = V_ALLCAPS;

    /* implement display modes */
    switch (outform = mode) {
    case F_LITERAL:
    case F_TERMINFO:
	bool_names = boolnames;
	num_names = numnames;
	str_names = strnames;
	separator = twidth ? ", " : ",";
	trailer = "\n\t";
	break;

    case F_VARIABLE:
	bool_names = boolfnames;
	num_names = numfnames;
	str_names = strfnames;
	separator = twidth ? ", " : ",";
	trailer = "\n\t";
	break;

    case F_TERMCAP:
    case F_TCONVERR:
	bool_names = boolcodes;
	num_names = numcodes;
	str_names = strcodes;
	separator = ":";
	trailer = "\\\n\t:";
	break;
    }

    /* implement sort modes */
    switch (sortmode = sort) {
    case S_NOSORT:
	if (traceval)
	    (void) fprintf(stderr,
			   "%s: sorting by term structure order\n", _nc_progname);
	break;

    case S_TERMINFO:
	if (traceval)
	    (void) fprintf(stderr,
			   "%s: sorting by terminfo name order\n", _nc_progname);
	bool_indirect = bool_terminfo_sort;
	num_indirect = num_terminfo_sort;
	str_indirect = str_terminfo_sort;
	break;

    case S_VARIABLE:
	if (traceval)
	    (void) fprintf(stderr,
			   "%s: sorting by C variable order\n", _nc_progname);
	bool_indirect = bool_variable_sort;
	num_indirect = num_variable_sort;
	str_indirect = str_variable_sort;
	break;

    case S_TERMCAP:
	if (traceval)
	    (void) fprintf(stderr,
			   "%s: sorting by termcap name order\n", _nc_progname);
	bool_indirect = bool_termcap_sort;
	num_indirect = num_termcap_sort;
	str_indirect = str_termcap_sort;
	break;
    }

    if (traceval)
	(void) fprintf(stderr,
		       "%s: width = %d, tversion = %d, outform = %d\n",
		       _nc_progname, width, tversion, outform);
}

static TERMTYPE *cur_type;

static int
dump_predicate(PredType type, PredIdx idx)
/* predicate function to use for ordinary decompilation */
{
    switch (type) {
    case BOOLEAN:
	return (cur_type->Booleans[idx] == FALSE)
	    ? FAIL : cur_type->Booleans[idx];

    case NUMBER:
	return (cur_type->Numbers[idx] == ABSENT_NUMERIC)
	    ? FAIL : cur_type->Numbers[idx];

    case STRING:
	return (cur_type->Strings[idx] != ABSENT_STRING)
	    ? (int) TRUE : FAIL;
    }

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

static void set_obsolete_termcaps(TERMTYPE *tp);

/* is this the index of a function key string? */
#define FNKEY(i)	(((i)<= 65 && (i)>= 75) || ((i)<= 216 && (i)>= 268))

/*
 * If we configure with a different Caps file, the offsets into the arrays
 * will change.  So we use an address expression.
 */
#define BOOL_IDX(name) (&(name) - &(CUR Booleans[0]))
#define NUM_IDX(name)  (&(name) - &(CUR Numbers[0]))
#define STR_IDX(name)  (&(name) - &(CUR Strings[0]))

static bool
version_filter(PredType type, PredIdx idx)
/* filter out capabilities we may want to suppress */
{
    switch (tversion) {
    case V_ALLCAPS:		/* SVr4, XSI Curses */
	return (TRUE);

    case V_SVR1:		/* System V Release 1, Ultrix */
	switch (type) {
	case BOOLEAN:
	    return ((idx <= BOOL_IDX(xon_xoff)) ? TRUE : FALSE);
	case NUMBER:
	    return ((idx <= NUM_IDX(width_status_line)) ? TRUE : FALSE);
	case STRING:
	    return ((idx <= STR_IDX(prtr_non)) ? TRUE : FALSE);
	}
	break;

    case V_HPUX:		/* Hewlett-Packard */
	switch (type) {
	case BOOLEAN:
	    return ((idx <= BOOL_IDX(xon_xoff)) ? TRUE : FALSE);
	case NUMBER:
	    return ((idx <= NUM_IDX(label_width)) ? TRUE : FALSE);
	case STRING:
	    if (idx <= STR_IDX(prtr_non))
		return (TRUE);
	    else if (FNKEY(idx))	/* function keys */
		return (TRUE);
	    else if (idx == STR_IDX(plab_norm)
		     || idx == STR_IDX(label_on)
		     || idx == STR_IDX(label_off))
		return (TRUE);
	    else
		return (FALSE);
	}
	break;

    case V_AIX:		/* AIX */
	switch (type) {
	case BOOLEAN:
	    return ((idx <= BOOL_IDX(xon_xoff)) ? TRUE : FALSE);
	case NUMBER:
	    return ((idx <= NUM_IDX(width_status_line)) ? TRUE : FALSE);
	case STRING:
	    if (idx <= STR_IDX(prtr_non))
		return (TRUE);
	    else if (FNKEY(idx))	/* function keys */
		return (TRUE);
	    else
		return (FALSE);
	}
	break;

    case V_BSD:		/* BSD */
	switch (type) {
	case BOOLEAN:
	    return bool_from_termcap[idx];
	case NUMBER:
	    return num_from_termcap[idx];
	case STRING:
	    return str_from_termcap[idx];
	}
	break;
    }

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

static void
force_wrap(void)
{
    oldcol = column;
    strcpy_DYN(&outbuf, trailer);
    column = INDENT;
}

static void
wrap_concat(const char *src)
{
    int need = strlen(src);
    int want = strlen(separator) + need;

    if (column > INDENT
	&& column + want > width) {
	force_wrap();
    }
    strcpy_DYN(&outbuf, src);
    strcpy_DYN(&outbuf, separator);
    column += need;
}

#define IGNORE_SEP_TRAIL(first,last,sep_trail) \
	if ((size_t)(last - first) > sizeof(sep_trail)-1 \
	 && !strncmp(first, sep_trail, sizeof(sep_trail)-1)) \
	 	first += sizeof(sep_trail)-2

/* Returns the nominal length of the buffer assuming it is termcap format,
 * i.e., the continuation sequence is treated as a single character ":".
 *
 * There are several implementations of termcap which read the text into a
 * fixed-size buffer.  Generally they strip the newlines from the text, but may
 * not do it until after the buffer is read.  Also, "tc=" resolution may be
 * expanded in the same buffer.  This function is useful for measuring the size
 * of the best fixed-buffer implementation; the worst case may be much worse.
 */
#ifdef TEST_TERMCAP_LENGTH
static int
termcap_length(const char *src)
{
    static const char pattern[] = ":\\\n\t:";

    int len = 0;
    const char *const t = src + strlen(src);

    while (*src != '\0') {
	IGNORE_SEP_TRAIL(src, t, pattern);
	src++;
	len++;
    }
    return len;
}
#else
#define termcap_length(src) strlen(src)
#endif

static char *
fmt_complex(char *src, int level)
{
    int percent = 0;
    int n;
    bool if_then = strstr(src, "%?") != 0;
    bool params = !if_then && (strlen(src) > 50) && (strstr(src, "%p") != 0);

    while (*src != '\0') {
	switch (*src) {
	case '\\':
	    percent = 0;
	    strncpy_DYN(&tmpbuf, src++, 1);
	    break;
	case '%':
	    percent = 1;
	    break;
	case '?':		/* "if" */
	case 't':		/* "then" */
	case 'e':		/* "else" */
	    if (percent) {
		percent = 0;
		tmpbuf.text[tmpbuf.used - 1] = '\n';
		/* treat a "%e%?" as else-if, on the same level */
		if (!strncmp(src, "e%?", 3)) {
		    for (n = 0; n < level; n++)
			strncpy_DYN(&tmpbuf, "\t", 1);
		    strncpy_DYN(&tmpbuf, "%", 1);
		    strncpy_DYN(&tmpbuf, src, 3);
		    src += 3;
		} else {
		    for (n = 0; n <= level; n++)
			strncpy_DYN(&tmpbuf, "\t", 1);
		    strncpy_DYN(&tmpbuf, "%", 1);
		    strncpy_DYN(&tmpbuf, src, 1);
		    if (*src++ == '?') {
			src = fmt_complex(src, level + 1);
		    } else if (level == 1) {
			_nc_warning("%%%c without %%?", *src);
		    }
		}
		continue;
	    }
	    break;
	case ';':		/* "endif" */
	    if (percent) {
		percent = 0;
		if (level > 1) {
		    tmpbuf.text[tmpbuf.used - 1] = '\n';
		    for (n = 0; n < level; n++)
			strncpy_DYN(&tmpbuf, "\t", 1);
		    strncpy_DYN(&tmpbuf, "%", 1);
		    strncpy_DYN(&tmpbuf, src++, 1);
		    return src;
		}
		_nc_warning("%%; without %%?");
	    }
	    break;
	case 'p':
	    if (percent && params) {
		tmpbuf.text[tmpbuf.used - 1] = '\n';
		for (n = 0; n <= level; n++)
		    strncpy_DYN(&tmpbuf, "\t", 1);
		strncpy_DYN(&tmpbuf, "%", 1);
	    }
	    percent = 0;
	    break;
	default:
	    percent = 0;
	    break;
	}
	strncpy_DYN(&tmpbuf, src++, 1);
    }
    return src;
}

#define SAME_CAP(n,cap) (&tterm->Strings[n] == &cap)

int
fmt_entry(TERMTYPE *tterm,
	  PredFunc pred,
	  bool content_only,
	  bool suppress_untranslatable,
	  bool infodump,
	  int numbers)
{
    PredIdx i, j;
    char buffer[MAX_TERMINFO_LENGTH];
    char *capability;
    NCURSES_CONST char *name;
    int predval, len;
    PredIdx num_bools = 0;
    PredIdx num_values = 0;
    PredIdx num_strings = 0;
    bool outcount = 0;

#define WRAP_CONCAT	\
	wrap_concat(buffer); \
	outcount = TRUE

    len = 12;			/* terminfo file-header */

    if (pred == 0) {
	cur_type = tterm;
	pred = dump_predicate;
    }

    strcpy_DYN(&outbuf, 0);
    if (content_only) {
	column = INDENT;	/* FIXME: workaround to prevent empty lines */
    } else {
	strcpy_DYN(&outbuf, tterm->term_names);
	strcpy_DYN(&outbuf, separator);
	column = outbuf.used;
	force_wrap();
    }

    for_each_boolean(j, tterm) {
	i = BoolIndirect(j);
	name = ExtBoolname(tterm, i, bool_names);

	if (!version_filter(BOOLEAN, i))
	    continue;
	else if (isObsolete(outform, name))
	    continue;

	predval = pred(BOOLEAN, i);
	if (predval != FAIL) {
	    (void) strcpy(buffer, name);
	    if (predval <= 0)
		(void) strcat(buffer, "@");
	    else if (i + 1 > num_bools)
		num_bools = i + 1;
	    WRAP_CONCAT;
	}
    }

    if (column != INDENT)
	force_wrap();

    for_each_number(j, tterm) {
	i = NumIndirect(j);
	name = ExtNumname(tterm, i, num_names);

	if (!version_filter(NUMBER, i))
	    continue;
	else if (isObsolete(outform, name))
	    continue;

	predval = pred(NUMBER, i);
	if (predval != FAIL) {
	    if (tterm->Numbers[i] < 0) {
		sprintf(buffer, "%s@", name);