libncurses: updated to 6.0

[tomato.git] / release / src / router / libncurses / progs / dump_entry.c

/****************************************************************************
 * Copyright (c) 1998-2014,2015 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 <zmbenhal@netcom.com> 1992,1995               *
 *     and: Eric S. Raymond <esr@snark.thyrsus.com>                         *
 *     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 1.118 2015/07/07 08:06:39 Werner.Fink Exp $")

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

#define OkIndex(index,array) ((int)(index) >= 0 && (int)(index) < (int) SIZEOF(array))

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 height = 65535;      /* max number of lines 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 bool checking;           /* true if we are checking for tic */

static char *save_sgr;

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 failed(const char *) GCC_NORETURN;

static void
failed(const char *s)
{
    perror(s);
    ExitProgram(EXIT_FAILURE);
}

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);
        if (dst->text == 0)
            failed("strncpy_DYN");
    }
    (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

#define NameTrans(check,result) \
            if ((np->nte_index <= OK_ ## check) \
                && check[np->nte_index]) \
                return (result[np->nte_index])

NCURSES_CONST char *
nametrans(const char *name)
/* translate a capability name to termcap from 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:
            NameTrans(bool_from_termcap, boolcodes);
            break;

        case NUMBER:
            NameTrans(num_from_termcap, numcodes);
            break;

        case STRING:
            NameTrans(str_from_termcap, strcodes);
            break;
        }
    }

    return (0);
}

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

    /* 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 > 0 && theight > 1) ? ", " : ",";
        trailer = "\n\t";
        break;

    case F_VARIABLE:
        bool_names = boolfnames;
        num_names = numfnames;
        str_names = strfnames;
        separator = (twidth > 0 && theight > 1) ? ", " : ",";
        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) >= STR_IDX(key_f0) && \
      (i) <= STR_IDX(key_f9)) || \
     ((i) >= STR_IDX(key_f11) && \
      (i) <= STR_IDX(key_f63)))

/*
 * 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) (PredType) (&(name) - &(CUR Booleans[0]))
#define NUM_IDX(name)  (PredType) (&(name) - &(CUR Numbers[0]))
#define STR_IDX(name)  (PredType) (&(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;

#define is_termcap(type) (OkIndex(idx, type##_from_termcap) && \
                          type##_from_termcap[idx])

    case V_BSD:         /* BSD */
        switch (type) {
        case BOOLEAN:
            return is_termcap(bool);
        case NUMBER:
            return is_termcap(num);
        case STRING:
            return is_termcap(str);
        }
        break;
    }

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

static void
trim_trailing(void)
{
    while (outbuf.used > 0 && outbuf.text[outbuf.used - 1] == ' ')
        outbuf.text[--outbuf.used] = '\0';
}

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

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

    if (column > INDENT
        && column + (int) want > width) {
        force_wrap();
    }
    strcpy_DYN(&outbuf, src);
    strcpy_DYN(&outbuf, separator);
    column += (int) 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 void
indent_DYN(DYNBUF * buffer, int level)
{
    int n;

    for (n = 0; n < level; n++)
        strncpy_DYN(buffer, "\t", (size_t) 1);
}

bool
has_params(const char *src)
{
    bool result = FALSE;
    int len = (int) strlen(src);
    int n;
    bool ifthen = FALSE;
    bool params = FALSE;

    for (n = 0; n < len - 1; ++n) {
        if (!strncmp(src + n, "%p", (size_t) 2)) {
            params = TRUE;
        } else if (!strncmp(src + n, "%;", (size_t) 2)) {
            ifthen = TRUE;
            result = params;
            break;
        }
    }
    if (!ifthen) {
        result = ((len > 50) && params);
    }
    return result;
}

static char *
fmt_complex(TERMTYPE *tterm, const char *capability, char *src, int level)
{
    bool percent = FALSE;
    bool params = has_params(src);

    while (*src != '\0') {
        switch (*src) {
        case '\\':
            percent = FALSE;
            strncpy_DYN(&tmpbuf, src++, (size_t) 1);
            break;
        case '%':
            percent = TRUE;
            break;
        case '?':               /* "if" */
        case 't':               /* "then" */
        case 'e':               /* "else" */
            if (percent) {
                percent = FALSE;
                tmpbuf.text[tmpbuf.used - 1] = '\n';
                /* treat a "%e" as else-if, on the same level */
                if (*src == 'e') {
                    indent_DYN(&tmpbuf, level);
                    strncpy_DYN(&tmpbuf, "%", (size_t) 1);
                    strncpy_DYN(&tmpbuf, src, (size_t) 1);
                    src++;
                    params = has_params(src);
                    if (!params && *src != '\0' && *src != '%') {
                        strncpy_DYN(&tmpbuf, "\n", (size_t) 1);
                        indent_DYN(&tmpbuf, level + 1);
                    }
                } else {
                    indent_DYN(&tmpbuf, level + 1);
                    strncpy_DYN(&tmpbuf, "%", (size_t) 1);
                    strncpy_DYN(&tmpbuf, src, (size_t) 1);
                    if (*src++ == '?') {
                        src = fmt_complex(tterm, capability, src, level + 1);
                        if (*src != '\0' && *src != '%') {
                            strncpy_DYN(&tmpbuf, "\n", (size_t) 1);
                            indent_DYN(&tmpbuf, level + 1);
                        }
                    } else if (level == 1) {
                        if (checking)
                            _nc_warning("%s: %%%c without %%? in %s",
                                        _nc_first_name(tterm->term_names),
                                        *src, capability);
                    }
                }
                continue;
            }
            break;
        case ';':               /* "endif" */
            if (percent) {
                percent = FALSE;
                if (level > 1) {
                    tmpbuf.text[tmpbuf.used - 1] = '\n';
                    indent_DYN(&tmpbuf, level);
                    strncpy_DYN(&tmpbuf, "%", (size_t) 1);
                    strncpy_DYN(&tmpbuf, src++, (size_t) 1);
                    if (src[0] == '%'
                        && src[1] != '\0'
                        && (strchr("?e;", src[1])) == 0) {
                        tmpbuf.text[tmpbuf.used++] = '\n';
                        indent_DYN(&tmpbuf, level);
                    }
                    return src;
                }
                if (checking)
                    _nc_warning("%s: %%; without %%? in %s",
                                _nc_first_name(tterm->term_names),
                                capability);
            }
            break;
        case 'p':
            if (percent && params) {
                tmpbuf.text[tmpbuf.used - 1] = '\n';
                indent_DYN(&tmpbuf, level + 1);
                strncpy_DYN(&tmpbuf, "%", (size_t) 1);
            }
            params = FALSE;
            percent = FALSE;
            break;
        case ' ':
            strncpy_DYN(&tmpbuf, "\\s", (size_t) 2);
            ++src;
            continue;
        default:
            percent = FALSE;
            break;
        }
        strncpy_DYN(&tmpbuf, src++, (size_t) 1);
    }
    return src;
}

#define SAME_CAP(n,cap) (&tterm->Strings[n] == &cap)
#define EXTRA_CAP 20

int
fmt_entry(TERMTYPE *tterm,
          PredFunc pred,
          int content_only,
          int suppress_untranslatable,
          int infodump,
          int numbers)
{
    PredIdx i, j;
    char buffer[MAX_TERMINFO_LENGTH + EXTRA_CAP];
    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);

        /*
         * Colon is legal in terminfo descriptions, but not in termcap.
         */
        if (!infodump) {
            char *p = outbuf.text;
            while (*p) {
                if (*p == ':') {
                    *p = '=';
                }
                ++p;
            }
        }
        strcpy_DYN(&outbuf, separator);
        column = (int) outbuf.used;
        if (height > 1)
            force_wrap();
    }

    for_each_boolean(j, tterm) {
        i = BoolIndirect(j);
        name = ExtBoolname(tterm, (int) i, bool_names);
        assert(strlen(name) < sizeof(buffer) - EXTRA_CAP);

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

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

    if (column != INDENT && height > 1)
        force_wrap();

    for_each_number(j, tterm) {
        i = NumIndirect(j);
        name = ExtNumname(tterm, (int) i, num_names);
        assert(strlen(name) < sizeof(buffer) - EXTRA_CAP);

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

        predval = pred(NUMBER, i);
        if (predval != FAIL) {
            if (tterm->Numbers[i] < 0) {
                _nc_SPRINTF(buffer, _nc_SLIMIT(sizeof(buffer))
                            "%s@", name);
            } else {
                _nc_SPRINTF(buffer, _nc_SLIMIT(sizeof(buffer))
                            "%s#%d", name, tterm->Numbers[i]);
                if (i + 1 > num_values)
                    num_values = i + 1;
            }
            WRAP_CONCAT;
        }
    }

    if (column != INDENT && height > 1)
        force_wrap();

    len += (int) (num_bools
                  + num_values * 2
                  + strlen(tterm->term_names) + 1);
    if (len & 1)
        len++;

#undef CUR
#define CUR tterm->
    if (outform == F_TERMCAP) {
        if (termcap_reset != ABSENT_STRING) {
            if (init_3string != ABSENT_STRING
                && !strcmp(init_3string, termcap_reset))
                DISCARD(init_3string);

            if (reset_2string != ABSENT_STRING
                && !strcmp(reset_2string, termcap_reset))
                DISCARD(reset_2string);
        }
    }

    for_each_string(j, tterm) {
        i = StrIndirect(j);
        name = ExtStrname(tterm, (int) i, str_names);
        assert(strlen(name) < sizeof(buffer) - EXTRA_CAP);

        capability = tterm->Strings[i];

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

#if NCURSES_XNAMES
        /*
         * Extended names can be longer than 2 characters, but termcap programs
         * cannot read those (filter them out).
         */
        if (outform == F_TERMCAP && (strlen(name) > 2))
            continue;
#endif

        if (outform == F_TERMCAP) {
            /*
             * Some older versions of vi want rmir/smir to be defined
             * for ich/ich1 to work.  If they're not defined, force
             * them to be output as defined and empty.
             */
            if (PRESENT(insert_character) || PRESENT(parm_ich)) {
                if (SAME_CAP(i, enter_insert_mode)
                    && enter_insert_mode == ABSENT_STRING) {
                    _nc_STRCPY(buffer, "im=", sizeof(buffer));
                    WRAP_CONCAT;
                    continue;
                }

                if (SAME_CAP(i, exit_insert_mode)
                    && exit_insert_mode == ABSENT_STRING) {
                    _nc_STRCPY(buffer, "ei=", sizeof(buffer));
                    WRAP_CONCAT;
                    continue;
                }
            }
            /*
             * termcap applications such as screen will be confused if sgr0
             * is translated to a string containing rmacs.  Filter that out.
             */
            if (PRESENT(exit_attribute_mode)) {
                if (SAME_CAP(i, exit_attribute_mode)) {
                    char *trimmed_sgr0;
                    char *my_sgr = set_attributes;

                    set_attributes = save_sgr;

                    trimmed_sgr0 = _nc_trim_sgr0(tterm);
                    if (strcmp(capability, trimmed_sgr0))
                        capability = trimmed_sgr0;
                    else {
                        if (trimmed_sgr0 != exit_attribute_mode)
                            free(trimmed_sgr0);
                    }

                    set_attributes = my_sgr;
                }
            }
        }

        predval = pred(STRING, i);
        buffer[0] = '\0';

        if (predval != FAIL) {
            if (capability != ABSENT_STRING
                && i + 1 > num_strings)
                num_strings = i + 1;

            if (!VALID_STRING(capability)) {
                _nc_SPRINTF(buffer, _nc_SLIMIT(sizeof(buffer))
                            "%s@", name);
                WRAP_CONCAT;
            } else if (outform == F_TERMCAP || outform == F_TCONVERR) {
                char *srccap = _nc_tic_expand(capability, TRUE, numbers);
                int params = (((i < (int) SIZEOF(parametrized)) &&
                               (i < STRCOUNT))
                              ? parametrized[i]
                              : ((*srccap == 'k')
                                 ? 0
                                 : has_params(srccap)));
                char *cv = _nc_infotocap(name, srccap, params);

                if (cv == 0) {
                    if (outform == F_TCONVERR) {
                        _nc_SPRINTF(buffer, _nc_SLIMIT(sizeof(buffer))
                                    "%s=!!! %s WILL NOT CONVERT !!!",
                                    name, srccap);
                    } else if (suppress_untranslatable) {
                        continue;
                    } else {
                        char *s = srccap, *d = buffer;
                        _nc_SPRINTF(d, _nc_SLIMIT(sizeof(buffer)) "..%s=", name);
                        d += strlen(d);
                        while ((*d = *s++) != 0) {
                            if (*d == ':') {
                                *d++ = '\\';
                                *d = ':';
                            } else if (*d == '\\') {
                                *++d = *s++;
                            }
                            d++;
                        }
                    }
                } else {
                    _nc_SPRINTF(buffer, _nc_SLIMIT(sizeof(buffer))
                                "%s=%s", name, cv);
                }
                len += (int) strlen(capability) + 1;
                WRAP_CONCAT;
            } else {
                char *src = _nc_tic_expand(capability,
                                           outform == F_TERMINFO, numbers);

                strcpy_DYN(&tmpbuf, 0);
                strcpy_DYN(&tmpbuf, name);
                strcpy_DYN(&tmpbuf, "=");
                if (pretty
                    && (outform == F_TERMINFO
                        || outform == F_VARIABLE)) {
                    fmt_complex(tterm, name, src, 1);
                } else {
                    strcpy_DYN(&tmpbuf, src);
                }
                len += (int) strlen(capability) + 1;
                wrap_concat(tmpbuf.text);
                outcount = TRUE;
            }
        }
        /* e.g., trimmed_sgr0 */
        if (capability != ABSENT_STRING &&
            capability != CANCELLED_STRING &&
            capability != tterm->Strings[i])
            free(capability);
    }
    len += (int) (num_strings * 2);

    /*
     * This piece of code should be an effective inverse of the functions
     * postprocess_terminfo() and postprocess_terminfo() in parse_entry.c.
     * Much more work should be done on this to support dumping termcaps.
     */
    if (tversion == V_HPUX) {
        if (VALID_STRING(memory_lock)) {
            _nc_SPRINTF(buffer, _nc_SLIMIT(sizeof(buffer))
                        "meml=%s", memory_lock);
            WRAP_CONCAT;
        }
        if (VALID_STRING(memory_unlock)) {
            _nc_SPRINTF(buffer, _nc_SLIMIT(sizeof(buffer))
                        "memu=%s", memory_unlock);
            WRAP_CONCAT;
        }
    } else if (tversion == V_AIX) {
        if (VALID_STRING(acs_chars)) {
            bool box_ok = TRUE;
            const char *acstrans = "lqkxjmwuvtn";
            const char *cp;
            char *tp, *sp, boxchars[11];

            tp = boxchars;
            for (cp = acstrans; *cp; cp++) {
                sp = (strchr) (acs_chars, *cp);
                if (sp)
                    *tp++ = sp[1];
                else {
                    box_ok = FALSE;
                    break;
                }
            }
            tp[0] = '\0';

            if (box_ok) {
                char *tmp = _nc_tic_expand(boxchars,
                                           (outform == F_TERMINFO),
                                           numbers);
                _nc_STRCPY(buffer, "box1=", sizeof(buffer));
                while (*tmp != '\0') {
                    size_t have = strlen(buffer);
                    size_t next = strlen(tmp);
                    size_t want = have + next + 1;
                    size_t last = next;
                    char save = '\0';

                    /*
                     * If the expanded string is too long for the buffer,
                     * chop it off and save the location where we chopped it.
                     */
                    if (want >= sizeof(buffer)) {
                        save = tmp[last];
                        tmp[last] = '\0';
                    }
                    _nc_STRCAT(buffer, tmp, sizeof(buffer));

                    /*
                     * If we chopped the buffer, replace the missing piece and
                     * shift everything to append the remainder.
                     */
                    if (save != '\0') {
                        next = 0;
                        tmp[last] = save;
                        while ((tmp[next] = tmp[last + next]) != '\0') {
                            ++next;
                        }
                    } else {
                        break;
                    }
                }
                WRAP_CONCAT;
            }
        }
    }

    /*
     * kludge: trim off trailer to avoid an extra blank line
     * in infocmp -u output when there are no string differences
     */
    if (outcount) {
        bool trimmed = FALSE;
        j = (PredIdx) outbuf.used;
        if (j >= 2
            && outbuf.text[j - 1] == '\t'
            && outbuf.text[j - 2] == '\n') {
            outbuf.used -= 2;
            trimmed = TRUE;
        } else if (j >= 4
                   && outbuf.text[j - 1] == ':'
                   && outbuf.text[j - 2] == '\t'
                   && outbuf.text[j - 3] == '\n'
                   && outbuf.text[j - 4] == '\\') {
            outbuf.used -= 4;
            trimmed = TRUE;
        }
        if (trimmed) {
            outbuf.text[outbuf.used] = '\0';
            column = oldcol;
            strcpy_DYN(&outbuf, " ");
        }
    }
#if 0
    fprintf(stderr, "num_bools = %d\n", num_bools);
    fprintf(stderr, "num_values = %d\n", num_values);
    fprintf(stderr, "num_strings = %d\n", num_strings);
    fprintf(stderr, "term_names=%s, len=%d, strlen(outbuf)=%d, outbuf=%s\n",
            tterm->term_names, len, outbuf.used, outbuf.text);
#endif
    /*
     * Here's where we use infodump to trigger a more stringent length check
     * for termcap-translation purposes.
     * Return the length of the raw entry, without tc= expansions,
     * It gives an idea of which entries are deadly to even *scan past*,
     * as opposed to *use*.
     */
    return (infodump ? len : (int) termcap_length(outbuf.text));
}

static bool
kill_string(TERMTYPE *tterm, char *cap)
{
    unsigned n;
    for (n = 0; n < NUM_STRINGS(tterm); ++n) {
        if (cap == tterm->Strings[n]) {
            tterm->Strings[n] = ABSENT_STRING;
            return TRUE;
        }
    }
    return FALSE;
}

static char *
find_string(TERMTYPE *tterm, char *name)
{
    PredIdx n;
    for (n = 0; n < NUM_STRINGS(tterm); ++n) {
        if (version_filter(STRING, n)
            && !strcmp(name, strnames[n])) {
            char *cap = tterm->Strings[n];
            if (VALID_STRING(cap)) {
                return cap;
            }
            break;
        }
    }
    return ABSENT_STRING;
}

/*
 * This is used to remove function-key labels from a termcap entry to
 * make it smaller.
 */
static int
kill_labels(TERMTYPE *tterm, int target)
{
    int n;
    int result = 0;
    char *cap;
    char name[10];

    for (n = 0; n <= 10; ++n) {
        _nc_SPRINTF(name, _nc_SLIMIT(sizeof(name)) "lf%d", n);
        if ((cap = find_string(tterm, name)) != ABSENT_STRING
            && kill_string(tterm, cap)) {
            target -= (int) (strlen(cap) + 5);
            ++result;
            if (target < 0)
                break;
        }
    }
    return result;
}

/*
 * This is used to remove function-key definitions from a termcap entry to
 * make it smaller.
 */
static int
kill_fkeys(TERMTYPE *tterm, int target)
{
    int n;
    int result = 0;
    char *cap;
    char name[10];

    for (n = 60; n >= 0; --n) {
        _nc_SPRINTF(name, _nc_SLIMIT(sizeof(name)) "kf%d", n);
        if ((cap = find_string(tterm, name)) != ABSENT_STRING
            && kill_string(tterm, cap)) {
            target -= (int) (strlen(cap) + 5);
            ++result;
            if (target < 0)
                break;
        }
    }
    return result;
}

/*
 * Check if the given acsc string is a 1-1 mapping, i.e., just-like-vt100.
 * Also, since this is for termcap, we only care about the line-drawing map.
 */
#define isLine(c) (strchr("lmkjtuvwqxn", c) != 0)

static bool
one_one_mapping(const char *mapping)
{
    bool result = TRUE;

    if (mapping != ABSENT_STRING) {
        int n = 0;
        while (mapping[n] != '\0') {
            if (isLine(mapping[n]) &&
                mapping[n] != mapping[n + 1]) {
                result = FALSE;
                break;
            }
            n += 2;
        }
    }
    return result;
}

#define FMT_ENTRY() \
                fmt_entry(tterm, pred, \
                        0, \
                        suppress_untranslatable, \
                        infodump, numbers)

#define SHOW_WHY PRINTF

static bool
purged_acs(TERMTYPE *tterm)
{
    bool result = FALSE;

    if (VALID_STRING(acs_chars)) {
        if (!one_one_mapping(acs_chars)) {
            enter_alt_charset_mode = ABSENT_STRING;
            exit_alt_charset_mode = ABSENT_STRING;
            SHOW_WHY("# (rmacs/smacs removed for consistency)\n");
        }
        result = TRUE;
    }
    return result;
}

/*
 * Dump a single entry.
 */
void
dump_entry(TERMTYPE *tterm,
           int suppress_untranslatable,
           int limited,
           int numbers,
           PredFunc pred)
{
    TERMTYPE save_tterm;
    int len, critlen;
    const char *legend;
    bool infodump;

    if (outform == F_TERMCAP || outform == F_TCONVERR) {
        critlen = MAX_TERMCAP_LENGTH;
        legend = "older termcap";
        infodump = FALSE;
        set_obsolete_termcaps(tterm);
    } else {
        critlen = MAX_TERMINFO_LENGTH;
        legend = "terminfo";
        infodump = TRUE;
    }

    save_sgr = set_attributes;

    if ((FMT_ENTRY() > critlen)
        && limited) {

        save_tterm = *tterm;
        if (!suppress_untranslatable) {
            SHOW_WHY("# (untranslatable capabilities removed to fit entry within %d bytes)\n",
                     critlen);
            suppress_untranslatable = TRUE;
        }
        if (FMT_ENTRY() > critlen) {
            /*
             * We pick on sgr because it's a nice long string capability that
             * is really just an optimization hack.  Another good candidate is
             * acsc since it is both long and unused by BSD termcap.
             */
            bool changed = FALSE;

#if NCURSES_XNAMES
            /*
             * Extended names are most likely function-key definitions.  Drop
             * those first.
             */
            unsigned n;
            for (n = STRCOUNT; n < NUM_STRINGS(tterm); n++) {
                const char *name = ExtStrname(tterm, (int) n, strnames);

                if (VALID_STRING(tterm->Strings[n])) {
                    set_attributes = ABSENT_STRING;
                    /* we remove long names anyway - only report the short */
                    if (strlen(name) <= 2) {
                        SHOW_WHY("# (%s removed to fit entry within %d bytes)\n",
                                 name,
                                 critlen);
                    }
                    changed = TRUE;
                    if (FMT_ENTRY() <= critlen)
                        break;
                }
            }
#endif
            if (VALID_STRING(set_attributes)) {
                set_attributes = ABSENT_STRING;
                SHOW_WHY("# (sgr removed to fit entry within %d bytes)\n",
                         critlen);
                changed = TRUE;
            }
            if (!changed || (FMT_ENTRY() > critlen)) {
                if (purged_acs(tterm)) {
                    acs_chars = ABSENT_STRING;
                    SHOW_WHY("# (acsc removed to fit entry within %d bytes)\n",
                             critlen);
                    changed = TRUE;
                }
            }
            if (!changed || (FMT_ENTRY() > critlen)) {
                int oldversion = tversion;

                tversion = V_BSD;
                SHOW_WHY("# (terminfo-only capabilities suppressed to fit entry within %d bytes)\n",
                         critlen);

                len = FMT_ENTRY();
                if (len > critlen
                    && kill_labels(tterm, len - critlen)) {
                    SHOW_WHY("# (some labels capabilities suppressed to fit entry within %d bytes)\n",
                             critlen);
                    len = FMT_ENTRY();
                }
                if (len > critlen
                    && kill_fkeys(tterm, len - critlen)) {
                    SHOW_WHY("# (some function-key capabilities suppressed to fit entry within %d bytes)\n",
                             critlen);
                    len = FMT_ENTRY();
                }
                if (len > critlen) {
                    (void) fprintf(stderr,
                                   "warning: %s entry is %d bytes long\n",
                                   _nc_first_name(tterm->term_names),
                                   len);
                    SHOW_WHY("# WARNING: this entry, %d bytes long, may core-dump %s libraries!\n",
                             len, legend);
                }
                tversion = oldversion;
            }
            set_attributes = save_sgr;
            *tterm = save_tterm;
        }
    } else if (!version_filter(STRING, STR_IDX(acs_chars))) {
        save_tterm = *tterm;
        if (purged_acs(tterm)) {
            (void) FMT_ENTRY();
        }
        *tterm = save_tterm;
    }
}

void
dump_uses(const char *name, bool infodump)
/* dump "use=" clauses in the appropriate format */
{
    char buffer[MAX_TERMINFO_LENGTH];

    if (outform == F_TERMCAP || outform == F_TCONVERR)
        trim_trailing();
    _nc_SPRINTF(buffer, _nc_SLIMIT(sizeof(buffer))
                "%s%s", infodump ? "use=" : "tc=", name);
    wrap_concat(buffer);
}

int
show_entry(void)
{
    /*
     * Trim any remaining whitespace.
     */
    if (outbuf.used != 0) {
        bool infodump = (outform != F_TERMCAP && outform != F_TCONVERR);
        char delim = (char) (infodump ? ',' : ':');
        int j;

        for (j = (int) outbuf.used - 1; j > 0; --j) {
            char ch = outbuf.text[j];
            if (ch == '\n') {
                ;
            } else if (isspace(UChar(ch))) {
                outbuf.used = (size_t) j;
            } else if (!infodump && ch == '\\') {
                outbuf.used = (size_t) j;
            } else if (ch == delim && (j == 0 || outbuf.text[j - 1] != '\\')) {
                outbuf.used = (size_t) (j + 1);
            } else {
                break;
            }
        }
        outbuf.text[outbuf.used] = '\0';
    }
    (void) fputs(outbuf.text, stdout);
    putchar('\n');
    return (int) outbuf.used;
}

void
compare_entry(PredHook hook,
              TERMTYPE *tp GCC_UNUSED,
              bool quiet)
/* compare two entries */
{
    PredIdx i, j;
    NCURSES_CONST char *name;

    if (!quiet)
        fputs("    comparing booleans.\n", stdout);
    for_each_boolean(j, tp) {
        i = BoolIndirect(j);
        name = ExtBoolname(tp, (int) i, bool_names);

        if (isObsolete(outform, name))
            continue;

        (*hook) (CMP_BOOLEAN, i, name);
    }

    if (!quiet)
        fputs("    comparing numbers.\n", stdout);
    for_each_number(j, tp) {
        i = NumIndirect(j);
        name = ExtNumname(tp, (int) i, num_names);

        if (isObsolete(outform, name))
            continue;

        (*hook) (CMP_NUMBER, i, name);
    }

    if (!quiet)
        fputs("    comparing strings.\n", stdout);
    for_each_string(j, tp) {
        i = StrIndirect(j);
        name = ExtStrname(tp, (int) i, str_names);

        if (isObsolete(outform, name))
            continue;

        (*hook) (CMP_STRING, i, name);
    }

    /* (void) fputs("    comparing use entries.\n", stdout); */
    (*hook) (CMP_USE, 0, "use");

}

#define NOTSET(s)       ((s) == 0)

/*
 * This bit of legerdemain turns all the terminfo variable names into
 * references to locations in the arrays Booleans, Numbers, and Strings ---
 * precisely what's needed.
 */
#undef CUR
#define CUR tp->

static void
set_obsolete_termcaps(TERMTYPE *tp)
{
#include "capdefaults.c"
}

/*
 * Convert an alternate-character-set string to canonical form: sorted and
 * unique.
 */
void
repair_acsc(TERMTYPE *tp)
{
    if (VALID_STRING(acs_chars)) {
        size_t n, m;
        char mapped[256];
        char extra = 0;
        unsigned source;
        unsigned target;
        bool fix_needed = FALSE;

        for (n = 0, source = 0; acs_chars[n] != 0; n++) {
            target = UChar(acs_chars[n]);
            if (source >= target) {
                fix_needed = TRUE;
                break;
            }
            source = target;
            if (acs_chars[n + 1])
                n++;
        }
        if (fix_needed) {
            memset(mapped, 0, sizeof(mapped));
            for (n = 0; acs_chars[n] != 0; n++) {
                source = UChar(acs_chars[n]);
                if ((target = (unsigned char) acs_chars[n + 1]) != 0) {
                    mapped[source] = (char) target;
                    n++;
                } else {
                    extra = (char) source;
                }
            }
            for (n = m = 0; n < sizeof(mapped); n++) {
                if (mapped[n]) {
                    acs_chars[m++] = (char) n;
                    acs_chars[m++] = mapped[n];
                }
            }
            if (extra)
                acs_chars[m++] = extra;         /* garbage in, garbage out */
            acs_chars[m] = 0;
        }
    }
}