Logo Search packages:      
Sourcecode: ncurses version File versions

captoinfo.c

/****************************************************************************
 * Copyright (c) 1998-2002,2003 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>                         *
 ****************************************************************************/

/*
 *    captoinfo.c --- conversion between termcap and terminfo formats
 *
 *    The captoinfo() code was swiped from Ross Ridge's mytinfo package,
 *    adapted to fit ncurses by Eric S. Raymond <esr@snark.thyrsus.com>.
 *
 *    There is just one entry point:
 *
 *    char *_nc_captoinfo(n, s, parameterized)
 *
 *    Convert value s for termcap string capability named n into terminfo
 *    format.
 *
 *    This code recognizes all the standard 4.4BSD %-escapes:
 *
 *    %%       output `%'
 *    %d       output value as in printf %d
 *    %2       output value as in printf %2d
 *    %3       output value as in printf %3d
 *    %.       output value as in printf %c
 *    %+x      add x to value, then do %.
 *    %>xy     if value > x then add y, no output
 *    %r       reverse order of two parameters, no output
 *    %i       increment by one, no output
 *    %n       exclusive-or all parameters with 0140 (Datamedia 2500)
 *    %B       BCD (16*(value/10)) + (value%10), no output
 *    %D       Reverse coding (value - 2*(value%16)), no output (Delta Data).
 *
 *    Also, %02 and %03 are accepted as synonyms for %2 and %3.
 *
 *    Besides all the standard termcap escapes, this translator understands
 *    the following extended escapes:
 *
 *    used by GNU Emacs termcap libraries
 *          %a[+*-/=][cp]x    GNU arithmetic.
 *          %m          xor the first two parameters by 0177
 *          %b          backup to previous parameter
 *          %f          skip this parameter
 *
 *    used by the University of Waterloo (MFCF) termcap libraries
 *          %-x    subtract parameter FROM char x and output it as a char
 *          %ax    add the character x to parameter
 *
 *    If #define WATERLOO is on, also enable these translations:
 *
 *          %sx    subtract parameter FROM the character x
 *
 *    By default, this Waterloo translations are not compiled in, because
 *    the Waterloo %s conflicts with the way terminfo uses %s in strings for
 *    function programming.
 *
 *    Note the two definitions of %a: the GNU definition is translated if the
 *    characters after the 'a' are valid for it, otherwise the UW definition
 *    is translated.
 */

#include <curses.priv.h>

#include <ctype.h>
#include <tic.h>

MODULE_ID("$Id: captoinfo.c,v 1.45 2003/11/08 21:28:04 tom Exp $")

#define MAX_PUSHED      16    /* max # args we can push onto the stack */

static int stack[MAX_PUSHED]; /* the stack */
static int stackptr;          /* the next empty place on the stack */
static int onstack;           /* the top of stack */
static int seenm;       /* seen a %m */
static int seenn;       /* seen a %n */
static int seenr;       /* seen a %r */
static int param;       /* current parameter */
static char *dp;        /* pointer to end of the converted string */

static char *my_string;
static size_t my_length;

static char *
init_string(void)
/* initialize 'my_string', 'my_length' */
{
    if (my_string == 0)
      my_string = typeMalloc(char, my_length = 256);
    if (my_string == 0)
      _nc_err_abort(MSG_NO_MEMORY);

    *my_string = '\0';
    return my_string;
}

static char *
save_string(char *d, const char *const s)
{
    size_t have = (d - my_string);
    size_t need = have + strlen(s) + 2;
    if (need > my_length) {
      my_string = (char *) realloc(my_string, my_length = (need + need));
      if (my_string == 0)
          _nc_err_abort(MSG_NO_MEMORY);
      d = my_string + have;
    }
    (void) strcpy(d, s);
    return d + strlen(d);
}

static inline char *
save_char(char *s, int c)
{
    static char temp[2];
    temp[0] = (char) c;
    return save_string(s, temp);
}

static void
push(void)
/* push onstack on to the stack */
{
    if (stackptr > MAX_PUSHED)
      _nc_warning("string too complex to convert");
    else
      stack[stackptr++] = onstack;
}

static void
pop(void)
/* pop the top of the stack into onstack */
{
    if (stackptr == 0) {
      if (onstack == 0)
          _nc_warning("I'm confused");
      else
          onstack = 0;
    } else
      onstack = stack[--stackptr];
    param++;
}

static int
cvtchar(register const char *sp)
/* convert a character to a terminfo push */
{
    unsigned char c = 0;
    int len;

    switch (*sp) {
    case '\\':
      switch (*++sp) {
      case '\'':
      case '$':
      case '\\':
      case '%':
          c = *sp;
          len = 2;
          break;
      case '\0':
          c = '\\';
          len = 1;
          break;
      case '0':
      case '1':
      case '2':
      case '3':
          len = 1;
          while (isdigit(UChar(*sp))) {
            c = 8 * c + (*sp++ - '0');
            len++;
          }
          break;
      default:
          c = *sp;
          len = 2;
          break;
      }
      break;
    case '^':
      c = (*++sp & 0x1f);
      len = 2;
      break;
    default:
      c = *sp;
      len = 1;
    }
    if (isgraph(c) && c != ',' && c != '\'' && c != '\\' && c != ':') {
      dp = save_string(dp, "%\'");
      dp = save_char(dp, c);
      dp = save_char(dp, '\'');
    } else {
      dp = save_string(dp, "%{");
      if (c > 99)
          dp = save_char(dp, c / 100 + '0');
      if (c > 9)
          dp = save_char(dp, ((int) (c / 10)) % 10 + '0');
      dp = save_char(dp, c % 10 + '0');
      dp = save_char(dp, '}');
    }
    return len;
}

static void
getparm(int parm, int n)
/* push n copies of param on the terminfo stack if not already there */
{
    if (seenr) {
      if (parm == 1)
          parm = 2;
      else if (parm == 2)
          parm = 1;
    }
    if (onstack == parm) {
      if (n > 1) {
          _nc_warning("string may not be optimal");
          dp = save_string(dp, "%Pa");
          while (n--) {
            dp = save_string(dp, "%ga");
          }
      }
      return;
    }
    if (onstack != 0)
      push();

    onstack = parm;

    while (n--) {
      dp = save_string(dp, "%p");
      dp = save_char(dp, '0' + parm);
    }

    if (seenn && parm < 3) {
      dp = save_string(dp, "%{96}%^");
    }

    if (seenm && parm < 3) {
      dp = save_string(dp, "%{127}%^");
    }
}

/*
 * Convert a termcap string to terminfo format.
 * 'cap' is the relevant terminfo capability index.
 * 's' is the string value of the capability.
 * 'parameterized' tells what type of translations to do:
 *    % translations if 1
 *    pad translations if >=0
 */
char *
_nc_captoinfo(const char *cap, const char *s, int const parameterized)
{
    const char *capstart;

    stackptr = 0;
    onstack = 0;
    seenm = 0;
    seenn = 0;
    seenr = 0;
    param = 1;

    dp = init_string();

    /* skip the initial padding (if we haven't been told not to) */
    capstart = 0;
    if (s == 0)
      s = "";
    if (parameterized >= 0 && isdigit(UChar(*s)))
      for (capstart = s;; s++)
          if (!(isdigit(UChar(*s)) || *s == '*' || *s == '.'))
            break;

    while (*s != '\0') {
      switch (*s) {
      case '%':
          s++;
          if (parameterized < 1) {
            dp = save_char(dp, '%');
            break;
          }
          switch (*s++) {
          case '%':
            dp = save_char(dp, '%');
            break;
          case 'r':
            if (seenr++ == 1) {
                _nc_warning("saw %%r twice in %s", cap);
            }
            break;
          case 'm':
            if (seenm++ == 1) {
                _nc_warning("saw %%m twice in %s", cap);
            }
            break;
          case 'n':
            if (seenn++ == 1) {
                _nc_warning("saw %%n twice in %s", cap);
            }
            break;
          case 'i':
            dp = save_string(dp, "%i");
            break;
          case '6':
          case 'B':
            getparm(param, 1);
            dp = save_string(dp, "%{10}%/%{16}%*");
            getparm(param, 1);
            dp = save_string(dp, "%{10}%m%+");
            break;
          case '8':
          case 'D':
            getparm(param, 2);
            dp = save_string(dp, "%{2}%*%-");
            break;
          case '>':
            getparm(param, 2);
            /* %?%{x}%>%t%{y}%+%; */
            dp = save_string(dp, "%?");
            s += cvtchar(s);
            dp = save_string(dp, "%>%t");
            s += cvtchar(s);
            dp = save_string(dp, "%+%;");
            break;
          case 'a':
            if ((*s == '=' || *s == '+' || *s == '-'
                 || *s == '*' || *s == '/')
                && (s[1] == 'p' || s[1] == 'c')
                && s[2] != '\0') {
                int l;
                l = 2;
                if (*s != '=')
                  getparm(param, 1);
                if (s[1] == 'p') {
                  getparm(param + s[2] - '@', 1);
                  if (param != onstack) {
                      pop();
                      param--;
                  }
                  l++;
                } else
                  l += cvtchar(s + 2);
                switch (*s) {
                case '+':
                  dp = save_string(dp, "%+");
                  break;
                case '-':
                  dp = save_string(dp, "%-");
                  break;
                case '*':
                  dp = save_string(dp, "%*");
                  break;
                case '/':
                  dp = save_string(dp, "%/");
                  break;
                case '=':
                  if (seenr) {
                      if (param == 1)
                        onstack = 2;
                      else if (param == 2)
                        onstack = 1;
                      else
                        onstack = param;
                  } else
                      onstack = param;
                  break;
                }
                s += l;
                break;
            }
            getparm(param, 1);
            s += cvtchar(s);
            dp = save_string(dp, "%+");
            break;
          case '+':
            getparm(param, 1);
            s += cvtchar(s);
            dp = save_string(dp, "%+%c");
            pop();
            break;
          case 's':
#ifdef WATERLOO
            s += cvtchar(s);
            getparm(param, 1);
            dp = save_string(dp, "%-");
#else
            getparm(param, 1);
            dp = save_string(dp, "%s");
            pop();
#endif /* WATERLOO */
            break;
          case '-':
            s += cvtchar(s);
            getparm(param, 1);
            dp = save_string(dp, "%-%c");
            pop();
            break;
          case '.':
            getparm(param, 1);
            dp = save_string(dp, "%c");
            pop();
            break;
          case '0':           /* not clear any of the historical termcaps did this */
            if (*s == '3')
                goto see03;
            else if (*s != '2')
                goto invalid;
            /* FALLTHRU */
          case '2':
            getparm(param, 1);
            dp = save_string(dp, "%2d");
            pop();
            break;
          case '3':
            see03:
            getparm(param, 1);
            dp = save_string(dp, "%3d");
            pop();
            break;
          case 'd':
            getparm(param, 1);
            dp = save_string(dp, "%d");
            pop();
            break;
          case 'f':
            param++;
            break;
          case 'b':
            param--;
            break;
          case '\\':
            dp = save_string(dp, "%\\");
            break;
          default:
            invalid:
            dp = save_char(dp, '%');
            s--;
            _nc_warning("unknown %% code %s (%#x) in %s",
                      unctrl((chtype) *s), UChar(*s), cap);
            break;
          }
          break;
#ifdef REVISIBILIZE
      case '\\':
          dp = save_char(dp, *s++);
          dp = save_char(dp, *s++);
          break;
      case '\n':
          dp = save_string(dp, "\\n");
          s++;
          break;
      case '\t':
          dp = save_string(dp, "\\t");
          s++;
          break;
      case '\r':
          dp = save_string(dp, "\\r");
          s++;
          break;
      case '\200':
          dp = save_string(dp, "\\0");
          s++;
          break;
      case '\f':
          dp = save_string(dp, "\\f");
          s++;
          break;
      case '\b':
          dp = save_string(dp, "\\b");
          s++;
          break;
      case ' ':
          dp = save_string(dp, "\\s");
          s++;
          break;
      case '^':
          dp = save_string(dp, "\\^");
          s++;
          break;
      case ':':
          dp = save_string(dp, "\\:");
          s++;
          break;
      case ',':
          dp = save_string(dp, "\\,");
          s++;
          break;
      default:
          if (*s == '\033') {
            dp = save_string(dp, "\\E");
            s++;
          } else if (*s > 0 && *s < 32) {
            dp = save_char(dp, '^');
            dp = save_char(dp, *s + '@');
            s++;
          } else if (*s <= 0 || *s >= 127) {
            dp = save_char(dp, '\\');
            dp = save_char(dp, ((*s & 0300) >> 6) + '0');
            dp = save_char(dp, ((*s & 0070) >> 3) + '0');
            dp = save_char(dp, (*s & 0007) + '0');
            s++;
          } else
            dp = save_char(dp, *s++);
          break;
#else
      default:
          dp = save_char(dp, *s++);
          break;
#endif
      }
    }

    /*
     * Now, if we stripped off some leading padding, add it at the end
     * of the string as mandatory padding.
     */
    if (capstart) {
      dp = save_string(dp, "$<");
      for (s = capstart;; s++)
          if (isdigit(UChar(*s)) || *s == '*' || *s == '.')
            dp = save_char(dp, *s);
          else
            break;
      dp = save_string(dp, "/>");
    }

    (void) save_char(dp, '\0');
    return (my_string);
}

/*
 * Check for an expression that corresponds to "%B" (BCD):
 *    (parameter / 10) * 16 + (parameter % 10)
 */
static int
bcd_expression(const char *str)
{
    /* leave this non-const for HPUX */
    static char fmt[] = "%%p%c%%{10}%%/%%{16}%%*%%p%c%%{10}%%m%%+";
    int len = 0;
    char ch1, ch2;

    if (sscanf(str, fmt, &ch1, &ch2) == 2
      && isdigit(UChar(ch1))
      && isdigit(UChar(ch2))
      && (ch1 == ch2)) {
      len = 28;
#ifndef NDEBUG
      {
          char buffer[80];
          int tst;
          sprintf(buffer, fmt, ch1, ch2);
          tst = strlen(buffer) - 1;
          assert(len == tst);
      }
#endif
    }
    return len;
}

static char *
save_tc_char(char *bufptr, int c1)
{
    char temp[80];

    if (is7bits(c1) && isprint(c1)) {
      if (c1 == ':' || c1 == '\\')
          bufptr = save_char(bufptr, '\\');
      bufptr = save_char(bufptr, c1);
    } else {
      if (c1 == (c1 & 0x1f))  /* iscntrl() returns T on 255 */
          (void) strcpy(temp, unctrl((chtype) c1));
      else
          (void) sprintf(temp, "\\%03o", c1);
      bufptr = save_string(bufptr, temp);
    }
    return bufptr;
}

static char *
save_tc_inequality(char *bufptr, int c1, int c2)
{
    bufptr = save_string(bufptr, "%>");
    bufptr = save_tc_char(bufptr, c1);
    bufptr = save_tc_char(bufptr, c2);
    return bufptr;
}

/*
 * Here are the capabilities infotocap assumes it can translate to:
 *
 *     %%       output `%'
 *     %d       output value as in printf %d
 *     %2       output value as in printf %2d
 *     %3       output value as in printf %3d
 *     %.       output value as in printf %c
 *     %+c      add character c to value, then do %.
 *     %>xy     if value > x then add y, no output
 *     %r       reverse order of two parameters, no output
 *     %i       increment by one, no output
 *     %n       exclusive-or all parameters with 0140 (Datamedia 2500)
 *     %B       BCD (16*(value/10)) + (value%10), no output
 *     %D       Reverse coding (value - 2*(value%16)), no output (Delta Data).
 *     %m       exclusive-or all parameters with 0177 (not in 4.4BSD)
 */

/*
 * Convert a terminfo string to termcap format.  Parameters are as in
 * _nc_captoinfo().
 */
char *
_nc_infotocap(const char *cap GCC_UNUSED, const char *str, int const parameterized)
{
    int seenone = 0, seentwo = 0, saw_m = 0, saw_n = 0;
    const char *padding;
    const char *trimmed = 0;
    char ch1 = 0, ch2 = 0;
    char *bufptr = init_string();
    int len;
    bool syntax_error = FALSE;

    /* we may have to move some trailing mandatory padding up front */
    padding = str + strlen(str) - 1;
    if (padding > str && *padding == '>' && *--padding == '/') {
      --padding;
      while (isdigit(UChar(*padding)) || *padding == '.' || *padding == '*')
          padding--;
      if (padding > str && *padding == '<' && *--padding == '$')
          trimmed = padding;
      padding += 2;

      while (isdigit(UChar(*padding)) || *padding == '.' || *padding == '*')
          bufptr = save_char(bufptr, *padding++);
    }

    for (; *str && str != trimmed; str++) {
      int c1, c2;
      char *cp = 0;

      if (str[0] == '\\' && (str[1] == '^' || str[1] == ',')) {
          bufptr = save_char(bufptr, *++str);
      } else if (str[0] == '$' && str[1] == '<') {    /* discard padding */
          str += 2;
          while (isdigit(UChar(*str))
               || *str == '.'
               || *str == '*'
               || *str == '/'
               || *str == '>')
            str++;
          --str;
      } else if (str[0] == '%' && str[1] == '%') {    /* escaped '%' */
          bufptr = save_string(bufptr, "%%");
      } else if (*str != '%' || (parameterized < 1)) {
          bufptr = save_char(bufptr, *str);
      } else if (sscanf(str, "%%?%%{%d}%%>%%t%%{%d}%%+%%;", &c1, &c2) == 2) {
          str = strchr(str, ';');
          bufptr = save_tc_inequality(bufptr, c1, c2);
      } else if (sscanf(str, "%%?%%{%d}%%>%%t%%'%c'%%+%%;", &c1, &ch2) == 2) {
          str = strchr(str, ';');
          bufptr = save_tc_inequality(bufptr, c1, c2);
      } else if (sscanf(str, "%%?%%'%c'%%>%%t%%{%d}%%+%%;", &ch1, &c2) == 2) {
          str = strchr(str, ';');
          bufptr = save_tc_inequality(bufptr, c1, c2);
      } else if (sscanf(str, "%%?%%'%c'%%>%%t%%'%c'%%+%%;", &ch1, &ch2) == 2) {
          str = strchr(str, ';');
          bufptr = save_tc_inequality(bufptr, c1, c2);
      } else if ((len = bcd_expression(str)) != 0) {
          str += len;
          bufptr = save_string(bufptr, "%B");
      } else if ((sscanf(str, "%%{%d}%%+%%c", &c1) == 1
                || sscanf(str, "%%'%c'%%+%%c", &ch1) == 1)
               && (cp = strchr(str, '+'))) {
          str = cp + 2;
          bufptr = save_string(bufptr, "%+");

          if (ch1)
            c1 = ch1;
          bufptr = save_tc_char(bufptr, c1);
      }
      /* FIXME: this "works" for 'delta' */
      else if (strncmp(str, "%{2}%*%-", 8) == 0) {
          str += 7;
          bufptr = save_string(bufptr, "%D");
      } else if (strncmp(str, "%{96}%^", 7) == 0) {
          str += 6;
          if (saw_m++ == 0) {
            bufptr = save_string(bufptr, "%n");
          }
      } else if (strncmp(str, "%{127}%^", 8) == 0) {
          str += 7;
          if (saw_n++ == 0) {
            bufptr = save_string(bufptr, "%m");
          }
      } else {          /* cm-style format element */
          str++;
          switch (*str) {
          case '%':
            bufptr = save_char(bufptr, '%');
            break;

          case '0':
          case '1':
          case '2':
          case '3':
          case '4':
          case '5':
          case '6':
          case '7':
          case '8':
          case '9':
            bufptr = save_char(bufptr, '%');
            while (isdigit(UChar(*str)))
                bufptr = save_char(bufptr, *str++);
            if (strchr("doxX.", *str)) {
                if (*str != 'd')    /* termcap doesn't have octal, hex */
                  return 0;
            }
            break;

          case 'd':
            bufptr = save_string(bufptr, "%d");
            break;

          case 'c':
            bufptr = save_string(bufptr, "%.");
            break;

            /*
             * %s isn't in termcap, but it's convenient to pass it through
             * so we can represent things like terminfo pfkey strings in
             * termcap notation.
             */
          case 's':
            bufptr = save_string(bufptr, "%s");
            break;

          case 'p':
            str++;
            if (*str == '1')
                seenone = 1;
            else if (*str == '2') {
                if (!seenone && !seentwo) {
                  bufptr = save_string(bufptr, "%r");
                  seentwo++;
                }
            } else if (*str >= '3')
                return (0);
            break;

          case 'i':
            bufptr = save_string(bufptr, "%i");
            break;

          default:
            bufptr = save_char(bufptr, *str);
            syntax_error = TRUE;
            break;
          }             /* endswitch (*str) */
      }                 /* endelse (*str == '%') */

      if (*str == '\0')
          break;

    }                   /* endwhile (*str) */

    return (syntax_error ? NULL : my_string);
}

#ifdef MAIN

int curr_line;

int
main(int argc, char *argv[])
{
    int c, tc = FALSE;

    while ((c = getopt(argc, argv, "c")) != EOF)
      switch (c) {
      case 'c':
          tc = TRUE;
          break;
      }

    curr_line = 0;
    for (;;) {
      char buf[BUFSIZ];

      ++curr_line;
      if (fgets(buf, sizeof(buf), stdin) == 0)
          break;
      buf[strlen(buf) - 1] = '\0';
      _nc_set_source(buf);

      if (tc) {
          char *cp = _nc_infotocap("to termcap", buf, 1);

          if (cp)
            (void) fputs(cp, stdout);
      } else
          (void) fputs(_nc_captoinfo("to terminfo", buf, 1), stdout);
      (void) putchar('\n');
    }
    return (0);
}
#endif /* MAIN */

/* captoinfo.c ends here */

Generated by  Doxygen 1.6.0   Back to index