1 /* $OpenBSD: comp_expand.c,v 1.2 1999/03/02 06:23:28 millert Exp $ */ 2 3 /**************************************************************************** 4 * Copyright (c) 1998 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("$From: comp_expand.c,v 1.10 1999/02/23 23:14:59 tom Exp $") 41 42 static int trailing_spaces(const char *src) 43 { 44 while (*src == ' ') 45 src++; 46 return *src == 0; 47 } 48 49 /* this deals with differences over whether 0x7f and 0x80..0x9f are controls */ 50 #define CHAR_OF(s) (*(unsigned const char *)(s)) 51 #define REALCTL(s) (CHAR_OF(s) < 127 && iscntrl(CHAR_OF(s))) 52 #define REALPRINT(s) (CHAR_OF(s) < 127 && isprint(CHAR_OF(s))) 53 54 char *_nc_tic_expand(const char *srcp, bool tic_format, bool numbers) 55 { 56 static char * buffer; 57 static size_t length; 58 59 int bufp; 60 const char *ptr, *str = VALID_STRING(srcp) ? srcp : ""; 61 bool islong = (strlen(str) > 3); 62 size_t need = (2 + strlen(str)) * 4; 63 int ch; 64 65 if (buffer == 0 || need > length) { 66 if ((buffer = typeRealloc(char, length = need, buffer)) == 0) 67 return 0; 68 } 69 70 bufp = 0; 71 ptr = str; 72 while ((ch = (*str & 0xff)) != 0) { 73 if (ch == '%' && REALPRINT(str+1)) { 74 buffer[bufp++] = *str++; 75 /* 76 * Though the character literals are more compact, most 77 * terminal descriptions use numbers and are not easy 78 * to read in character-literal form. This is the 79 * default option for tic/infocmp. 80 */ 81 if (numbers 82 && str[0] == S_QUOTE 83 && str[1] != '\\' 84 && REALPRINT(str+1) 85 && str[2] == S_QUOTE) { 86 sprintf(buffer+bufp, "{%d}", str[1]); 87 bufp += strlen(buffer+bufp); 88 str += 2; 89 } 90 /* 91 * If we have a "%{number}", try to translate it into 92 * a "%'char'" form, since that will run a little faster 93 * when we're interpreting it. Also, having one form 94 * for the constant makes it simpler to compare terminal 95 * descriptions. 96 */ 97 else if (!numbers 98 && str[0] == L_BRACE 99 && isdigit(str[1])) { 100 char *dst = 0; 101 long value = strtol(str+1, &dst, 0); 102 if (dst != 0 103 && *dst == R_BRACE 104 && value < 127 105 && value != '\\' /* FIXME */ 106 && isprint((int)value)) { 107 ch = (int)value; 108 buffer[bufp++] = S_QUOTE; 109 if (ch == '\\' 110 || ch == S_QUOTE) 111 buffer[bufp++] = '\\'; 112 buffer[bufp++] = ch; 113 buffer[bufp++] = S_QUOTE; 114 str = dst; 115 } else { 116 buffer[bufp++] = *str; 117 } 118 } else { 119 buffer[bufp++] = *str; 120 } 121 } 122 else if (ch == 128) { 123 buffer[bufp++] = '\\'; 124 buffer[bufp++] = '0'; 125 } 126 else if (ch == '\033') { 127 buffer[bufp++] = '\\'; 128 buffer[bufp++] = 'E'; 129 } 130 else if (ch == '\\' && tic_format && (str == srcp || str[-1] != '^')) { 131 buffer[bufp++] = '\\'; 132 buffer[bufp++] = '\\'; 133 } 134 else if (ch == ' ' && tic_format && (str == srcp || trailing_spaces(str))) { 135 buffer[bufp++] = '\\'; 136 buffer[bufp++] = 's'; 137 } 138 else if ((ch == ',' || ch == ':' || ch == '^') && tic_format) { 139 buffer[bufp++] = '\\'; 140 buffer[bufp++] = ch; 141 } 142 else if (REALPRINT(str) && (ch != ',' && ch != ':' && !(ch == '!' && !tic_format) && ch != '^')) 143 buffer[bufp++] = ch; 144 #if 0 /* FIXME: this would be more readable (in fact the whole 'islong' logic should be removed) */ 145 else if (ch == '\b') { 146 buffer[bufp++] = '\\'; 147 buffer[bufp++] = 'b'; 148 } 149 else if (ch == '\f') { 150 buffer[bufp++] = '\\'; 151 buffer[bufp++] = 'f'; 152 } 153 else if (ch == '\t' && islong) { 154 buffer[bufp++] = '\\'; 155 buffer[bufp++] = 't'; 156 } 157 #endif 158 else if (ch == '\r' && (islong || (strlen(srcp) > 2 && str[1] == '\0'))) { 159 buffer[bufp++] = '\\'; 160 buffer[bufp++] = 'r'; 161 } 162 else if (ch == '\n' && islong) { 163 buffer[bufp++] = '\\'; 164 buffer[bufp++] = 'n'; 165 } 166 #define UnCtl(c) ((c) + '@') 167 else if (REALCTL(str) && ch != '\\' && (!islong || isdigit(str[1]))) 168 { 169 (void) sprintf(&buffer[bufp], "^%c", UnCtl(ch)); 170 bufp += 2; 171 } 172 else 173 { 174 (void) sprintf(&buffer[bufp], "\\%03o", ch); 175 bufp += 4; 176 } 177 178 str++; 179 } 180 181 buffer[bufp] = '\0'; 182 return(buffer); 183 } 184