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 } 190