ncurses/tinfo/comp_expand.c

   1 /****************************************************************************
   2  * Copyright (c) 1998 Free Software Foundation, Inc.                        *
   3  *                                                                          *
   4  * Permission is hereby granted, free of charge, to any person obtaining a  *
   5  * copy of this software and associated documentation files (the            *
   6  * "Software"), to deal in the Software without restriction, including      *
   7  * without limitation the rights to use, copy, modify, merge, publish,      *
   8  * distribute, distribute with modifications, sublicense, and/or sell       *
   9  * copies of the Software, and to permit persons to whom the Software is    *
  10  * furnished to do so, subject to the following conditions:                 *
  11  *                                                                          *
  12  * The above copyright notice and this permission notice shall be included  *
  13  * in all copies or substantial portions of the Software.                   *
  14  *                                                                          *
  15  * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS  *
  16  * OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF               *
  17  * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.   *
  18  * IN NO EVENT SHALL THE ABOVE COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM,   *
  19  * DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR    *
  20  * OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR    *
  21  * THE USE OR OTHER DEALINGS IN THE SOFTWARE.                               *
  22  *                                                                          *
  23  * Except as contained in this notice, the name(s) of the above copyright   *
  24  * holders shall not be used in advertising or otherwise to promote the     *
  25  * sale, use or other dealings in this Software without prior written       *
  26  * authorization.                                                           *
  27  ****************************************************************************/
  28
  29 /****************************************************************************
  30  *  Author: Thomas E. Dickey <dickey@clark.net> 1998                        *
  31  ****************************************************************************/
  32
  33 #include <curses.priv.h>
  34
  35 #include <ctype.h>
  36 #include <tic.h>
  37
  38 MODULE_ID("$Id: comp_expand.c,v 1.11 1999/03/07 00:51:07 tom Exp $")
  39
  40 static int trailing_spaces(const char *src)
  41 {
  42         while (*src == ' ')
  43                 src++;
  44         return *src == 0;
  45 }
  46
  47 /* this deals with differences over whether 0x7f and 0x80..0x9f are controls */
  48 #define CHAR_OF(s) (*(unsigned const char *)(s))
  49 #define REALCTL(s) (CHAR_OF(s) < 127 && iscntrl(CHAR_OF(s)))
  50 #define REALPRINT(s) (CHAR_OF(s) < 127 && isprint(CHAR_OF(s)))
  51
  52 char *_nc_tic_expand(const char *srcp, bool tic_format, int numbers)
  53 {
  54 static char *   buffer;
  55 static size_t   length;
  56
  57 int             bufp;
  58 const char      *ptr, *str = VALID_STRING(srcp) ? srcp : "";
  59 bool            islong = (strlen(str) > 3);
  60 size_t          need = (2 + strlen(str)) * 4;
  61 int             ch;
  62
  63         if (buffer == 0 || need > length) {
  64                 if ((buffer = typeRealloc(char, length = need, buffer)) == 0)
  65                         return 0;
  66         }
  67
  68         bufp = 0;
  69         ptr = str;
  70         while ((ch = (*str & 0xff)) != 0) {
  71                 if (ch == '%' && REALPRINT(str+1)) {
  72                         buffer[bufp++] = *str++;
  73                         /*
  74                          * Though the character literals are more compact, most
  75                          * terminal descriptions use numbers and are not easy
  76                          * to read in character-literal form.
  77                          */
  78                         switch (numbers) {
  79                         case -1:
  80                             if (str[0] == S_QUOTE
  81                              && str[1] != '\\'
  82                              && REALPRINT(str+1)
  83                              && str[2] == S_QUOTE) {
  84                                 sprintf(buffer+bufp, "{%d}", str[1]);
  85                                 bufp += strlen(buffer+bufp);
  86                                 str += 2;
  87                             } else {
  88                                 buffer[bufp++] = *str;
  89                             }
  90                             break;
  91                         /*
  92                          * If we have a "%{number}", try to translate it into
  93                          * a "%'char'" form, since that will run a little faster
  94                          * when we're interpreting it.  Also, having one form
  95                          * for the constant makes it simpler to compare terminal
  96                          * descriptions.
  97                          */
  98                         case 1:
  99                             if (str[0] == L_BRACE
 100                              && isdigit(str[1])) {
 101                                 char *dst = 0;
 102                                 long value = strtol(str+1, &dst, 0);
 103                                 if (dst != 0
 104                                  && *dst == R_BRACE
 105                                  && value < 127
 106                                  && value != '\\'       /* FIXME */
 107                                  && isprint((int)value)) {
 108                                         ch = (int)value;
 109                                         buffer[bufp++] = S_QUOTE;
 110                                         if (ch == '\\'
 111                                          || ch == S_QUOTE)
 112                                                 buffer[bufp++] = '\\';
 113                                         buffer[bufp++] = ch;
 114                                         buffer[bufp++] = S_QUOTE;
 115                                         str = dst;
 116                                 } else {
 117                                         buffer[bufp++] = *str;
 118                                 }
 119                             } else {
 120                                     buffer[bufp++] = *str;
 121                             }
 122                             break;
 123                         default:
 124                             buffer[bufp++] = *str;
 125                             break;
 126                         }
 127                 }
 128                 else if (ch == 128) {
 129                         buffer[bufp++] = '\\';
 130                         buffer[bufp++] = '0';
 131                 }
 132                 else if (ch == '\033') {
 133                         buffer[bufp++] = '\\';
 134                         buffer[bufp++] = 'E';
 135                 }
 136                 else if (ch == '\\' && tic_format && (str == srcp || str[-1] != '^')) {
 137                         buffer[bufp++] = '\\';
 138                         buffer[bufp++] = '\\';
 139                 }
 140                 else if (ch == ' ' && tic_format && (str == srcp || trailing_spaces(str))) {
 141                         buffer[bufp++] = '\\';
 142                         buffer[bufp++] = 's';
 143                 }
 144                 else if ((ch == ',' || ch == ':' || ch == '^') && tic_format) {
 145                         buffer[bufp++] = '\\';
 146                         buffer[bufp++] = ch;
 147                 }
 148                 else if (REALPRINT(str) && (ch != ',' && ch != ':' && !(ch == '!' && !tic_format) && ch != '^'))
 149                         buffer[bufp++] = ch;
 150 #if 0           /* FIXME: this would be more readable (in fact the whole 'islong' logic should be removed) */
 151                 else if (ch == '\b') {
 152                         buffer[bufp++] = '\\';
 153                         buffer[bufp++] = 'b';
 154                 }
 155                 else if (ch == '\f') {
 156                         buffer[bufp++] = '\\';
 157                         buffer[bufp++] = 'f';
 158                 }
 159                 else if (ch == '\t' && islong) {
 160                         buffer[bufp++] = '\\';
 161                         buffer[bufp++] = 't';
 162                 }
 163 #endif
 164                 else if (ch == '\r' && (islong || (strlen(srcp) > 2 && str[1] == '\0'))) {
 165                         buffer[bufp++] = '\\';
 166                         buffer[bufp++] = 'r';
 167                 }
 168                 else if (ch == '\n' && islong) {
 169                         buffer[bufp++] = '\\';
 170                         buffer[bufp++] = 'n';
 171                 }
 172 #define UnCtl(c) ((c) + '@')
 173                 else if (REALCTL(str) && ch != '\\' && (!islong || isdigit(str[1])))
 174                 {
 175                         (void) sprintf(&buffer[bufp], "^%c", UnCtl(ch));
 176                         bufp += 2;
 177                 }
 178                 else
 179                 {
 180                         (void) sprintf(&buffer[bufp], "\\%03o", ch);
 181                         bufp += 4;
 182                 }
 183
 184                 str++;
 185         }
 186
 187         buffer[bufp] = '\0';
 188         return(buffer);
 189 }