1 /* $OpenBSD: comp_expand.c,v 1.7 2010/01/12 23:22:06 nicm Exp $ */ 2 3 /**************************************************************************** 4 * Copyright (c) 1998-2007,2008 Free Software Foundation, Inc. * 5 * * 6 * Permission is hereby granted, free of charge, to any person obtaining a * 7 * copy of this software and associated documentation files (the * 8 * "Software"), to deal in the Software without restriction, including * 9 * without limitation the rights to use, copy, modify, merge, publish, * 10 * distribute, distribute with modifications, sublicense, and/or sell * 11 * copies of the Software, and to permit persons to whom the Software is * 12 * furnished to do so, subject to the following conditions: * 13 * * 14 * The above copyright notice and this permission notice shall be included * 15 * in all copies or substantial portions of the Software. * 16 * * 17 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS * 18 * OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF * 19 * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. * 20 * IN NO EVENT SHALL THE ABOVE COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, * 21 * DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR * 22 * OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR * 23 * THE USE OR OTHER DEALINGS IN THE SOFTWARE. * 24 * * 25 * Except as contained in this notice, the name(s) of the above copyright * 26 * holders shall not be used in advertising or otherwise to promote the * 27 * sale, use or other dealings in this Software without prior written * 28 * authorization. * 29 ****************************************************************************/ 30 31 /**************************************************************************** 32 * Author: Thomas E. Dickey <dickey@clark.net> 1998 * 33 ****************************************************************************/ 34 35 #include <curses.priv.h> 36 37 #include <ctype.h> 38 #include <tic.h> 39 40 MODULE_ID("$Id: comp_expand.c,v 1.7 2010/01/12 23:22:06 nicm Exp $") 41 42 static int 43 trailing_spaces(const char *src) 44 { 45 while (*src == ' ') 46 src++; 47 return *src == 0; 48 } 49 50 /* this deals with differences over whether 0x7f and 0x80..0x9f are controls */ 51 #define REALCTL(s) (UChar(*(s)) < 127 && iscntrl(UChar(*(s)))) 52 #define REALPRINT(s) (UChar(*(s)) < 127 && isprint(UChar(*(s)))) 53 54 NCURSES_EXPORT(char *) 55 _nc_tic_expand(const char *srcp, bool tic_format, int numbers) 56 { 57 static char *buffer; 58 static size_t length; 59 60 int bufp; 61 const char *str = VALID_STRING(srcp) ? srcp : "\0\0"; 62 bool islong = (strlen(str) > 3); 63 size_t need = (2 + strlen(str)) * 4; 64 int ch; 65 66 #if NO_LEAKS 67 if (srcp == 0) { 68 if (buffer != 0) { 69 FreeAndNull(buffer); 70 length = 0; 71 } 72 return 0; 73 } 74 #endif 75 if (buffer == 0 || need > length) { 76 if ((buffer = typeRealloc(char, length = need, buffer)) == 0) 77 return 0; 78 } 79 80 bufp = 0; 81 while ((ch = UChar(*str)) != 0) { 82 if (ch == '%' && REALPRINT(str + 1)) { 83 buffer[bufp++] = *str++; 84 /* 85 * Though the character literals are more compact, most 86 * terminal descriptions use numbers and are not easy 87 * to read in character-literal form. 88 */ 89 switch (numbers) { 90 case -1: 91 if (str[0] == S_QUOTE 92 && str[1] != '\\' 93 && REALPRINT(str + 1) 94 && str[2] == S_QUOTE) { 95 snprintf(buffer + bufp, length - bufp, "{%d}", str[1]); 96 bufp += strlen(buffer + bufp); 97 str += 2; 98 } else { 99 buffer[bufp++] = *str; 100 } 101 break; 102 /* 103 * If we have a "%{number}", try to translate it into 104 * a "%'char'" form, since that will run a little faster 105 * when we're interpreting it. Also, having one form 106 * for the constant makes it simpler to compare terminal 107 * descriptions. 108 */ 109 case 1: 110 if (str[0] == L_BRACE 111 && isdigit(UChar(str[1]))) { 112 char *dst = 0; 113 long value = strtol(str + 1, &dst, 0); 114 if (dst != 0 115 && *dst == R_BRACE 116 && value < 127 117 && value != '\\' /* FIXME */ 118 && isprint((int) value)) { 119 ch = (int) value; 120 buffer[bufp++] = S_QUOTE; 121 if (ch == '\\' 122 || ch == S_QUOTE) 123 buffer[bufp++] = '\\'; 124 buffer[bufp++] = (char) ch; 125 buffer[bufp++] = S_QUOTE; 126 str = dst; 127 } else { 128 buffer[bufp++] = *str; 129 } 130 } else { 131 buffer[bufp++] = *str; 132 } 133 break; 134 default: 135 buffer[bufp++] = *str; 136 break; 137 } 138 } else if (ch == 128) { 139 buffer[bufp++] = '\\'; 140 buffer[bufp++] = '0'; 141 } else if (ch == '\033') { 142 buffer[bufp++] = '\\'; 143 buffer[bufp++] = 'E'; 144 } else if (ch == '\\' && tic_format && (str == srcp || str[-1] != '^')) { 145 buffer[bufp++] = '\\'; 146 buffer[bufp++] = '\\'; 147 } else if (ch == ' ' && tic_format && (str == srcp || 148 trailing_spaces(str))) { 149 buffer[bufp++] = '\\'; 150 buffer[bufp++] = 's'; 151 } else if ((ch == ',' || ch == ':' || ch == '^') && tic_format) { 152 buffer[bufp++] = '\\'; 153 buffer[bufp++] = (char) ch; 154 } else if (REALPRINT(str) 155 && (ch != ',' 156 && ch != ':' 157 && !(ch == '!' && !tic_format) 158 && ch != '^')) 159 buffer[bufp++] = (char) ch; 160 #if 0 /* FIXME: this would be more readable (in fact the whole 'islong' logic should be removed) */ 161 else if (ch == '\b') { 162 buffer[bufp++] = '\\'; 163 buffer[bufp++] = 'b'; 164 } else if (ch == '\f') { 165 buffer[bufp++] = '\\'; 166 buffer[bufp++] = 'f'; 167 } else if (ch == '\t' && islong) { 168 buffer[bufp++] = '\\'; 169 buffer[bufp++] = 't'; 170 } 171 #endif 172 else if (ch == '\r' && (islong || (strlen(srcp) > 2 && str[1] == '\0'))) { 173 buffer[bufp++] = '\\'; 174 buffer[bufp++] = 'r'; 175 } else if (ch == '\n' && islong) { 176 buffer[bufp++] = '\\'; 177 buffer[bufp++] = 'n'; 178 } 179 #define UnCtl(c) ((c) + '@') 180 else if (REALCTL(str) && ch != '\\' 181 && (!islong || isdigit(UChar(str[1])))) { 182 (void) snprintf(buffer + bufp, length - bufp, "^%c", UnCtl(ch)); 183 bufp += strlen(buffer + bufp); 184 } else { 185 (void) snprintf(buffer + bufp, length - bufp, "\\%03o", ch); 186 bufp += strlen(buffer + bufp); 187 } 188 189 str++; 190 } 191 192 buffer[bufp] = '\0'; 193 return (buffer); 194 } 195