1/* $OpenBSD: lib_tgoto.c,v 1.7 2023/10/17 09:52:09 nicm Exp $ */ 2 3/**************************************************************************** 4 * Copyright 2018-2020,2023 Thomas E. Dickey * 5 * Copyright 2000-2008,2012 Free Software Foundation, Inc. * 6 * * 7 * Permission is hereby granted, free of charge, to any person obtaining a * 8 * copy of this software and associated documentation files (the * 9 * "Software"), to deal in the Software without restriction, including * 10 * without limitation the rights to use, copy, modify, merge, publish, * 11 * distribute, distribute with modifications, sublicense, and/or sell * 12 * copies of the Software, and to permit persons to whom the Software is * 13 * furnished to do so, subject to the following conditions: * 14 * * 15 * The above copyright notice and this permission notice shall be included * 16 * in all copies or substantial portions of the Software. * 17 * * 18 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS * 19 * OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF * 20 * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. * 21 * IN NO EVENT SHALL THE ABOVE COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, * 22 * DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR * 23 * OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR * 24 * THE USE OR OTHER DEALINGS IN THE SOFTWARE. * 25 * * 26 * Except as contained in this notice, the name(s) of the above copyright * 27 * holders shall not be used in advertising or otherwise to promote the * 28 * sale, use or other dealings in this Software without prior written * 29 * authorization. * 30 ****************************************************************************/ 31 32/**************************************************************************** 33 * Author: Thomas E. Dickey * 34 ****************************************************************************/ 35 36#include <curses.priv.h> 37 38#include <ctype.h> 39#include <termcap.h> 40 41MODULE_ID("$Id: lib_tgoto.c,v 1.7 2023/10/17 09:52:09 nicm Exp $") 42 43#if !PURE_TERMINFO 44static bool 45is_termcap(const char *string) 46{ 47 bool result = TRUE; 48 49 if (string == 0 || *string == '\0') { 50 result = FALSE; /* tparm() handles empty strings */ 51 } else { 52 while ((*string != '\0') && result) { 53 if (*string == '%') { 54 switch (*++string) { 55 case 'p': 56 result = FALSE; 57 break; 58 case '\0': 59 string--; 60 break; 61 } 62 } else if (string[0] == '$' && string[1] == '<') { 63 result = FALSE; 64 } 65 string++; 66 } 67 } 68 return result; 69} 70 71static char * 72tgoto_internal(const char *string, int x, int y) 73{ 74 static char *result; 75 static size_t length; 76 77 int swap_arg; 78 int param[3]; 79 size_t used = 0; 80 size_t need = 10; 81 int *value = param; 82 bool need_BC = FALSE; 83 84 if (BC) 85 need += strlen(BC); 86 87 param[0] = y; 88 param[1] = x; 89 param[2] = 0; 90 91 while (*string != 0) { 92 if ((used + need) > length) { 93 length += (used + need); 94 if ((result = typeRealloc(char, length, result)) == 0) { 95 length = 0; 96 break; 97 } 98 } 99 if (*string == '%') { 100 const char *fmt = 0; 101 102 switch (*++string) { 103 case '\0': 104 string--; 105 break; 106 case 'd': 107 fmt = "%d"; 108 break; 109 case '2': 110 fmt = "%02d"; 111 *value %= 100; 112 break; 113 case '3': 114 fmt = "%03d"; 115 *value %= 1000; 116 break; 117 case '+': 118 *value += UChar(*++string); 119 /* FALLTHRU */ 120 case '.': 121 /* 122 * Guard against tputs() seeing a truncated string. The 123 * termcap documentation refers to a similar fixup for \n 124 * and \r, but I don't see that it could work -TD 125 */ 126 if (*value == 0) { 127 if (BC != 0) { 128 *value += 1; 129 need_BC = TRUE; 130 } else { 131 /* tputs will pretend this is \0, which will almost 132 * always work since ANSI-compatible terminals ignore 133 * the character. ECMA-48 does not document a C1 134 * control for this value. A few (obsolete) terminals 135 * can use this value in special cases, such as cursor 136 * addressing using single-byte coordinates. 137 */ 138 *value = 0200; 139 } 140 } 141 result[used++] = (char) *value++; 142 break; 143 case '%': 144 result[used++] = *string; 145 break; 146 case 'r': 147 swap_arg = param[0]; 148 param[0] = param[1]; 149 param[1] = swap_arg; 150 break; 151 case 'i': 152 param[0] += 1; 153 param[1] += 1; 154 break; 155 case '>': 156 if (*value > string[1]) 157 *value += string[2]; 158 string += 2; 159 break; 160 case 'n': /* Datamedia 2500 */ 161 param[0] ^= 0140; 162 param[1] ^= 0140; 163 break; 164 case 'B': /* BCD */ 165 *value = 16 * (*value / 10) + (*value % 10); 166 break; 167 case 'D': /* Reverse coding (Delta Data) */ 168 *value -= 2 * (*value % 16); 169 break; 170 } 171 if (fmt != 0) { 172 _nc_SPRINTF(result + used, _nc_SLIMIT(length - used) 173 fmt, *value++); 174 used += strlen(result + used); 175 fmt = 0; 176 } 177 if (value - param > 2) { 178 value = param + 2; 179 *value = 0; 180 } 181 } else { 182 result[used++] = *string; 183 } 184 string++; 185 } 186 if (result != 0) { 187 if (need_BC) { 188 _nc_STRCPY(result + used, BC, length - used); 189 used += strlen(BC); 190 } 191 result[used] = '\0'; 192 } 193 return result; 194} 195#endif 196 197/* 198 * Retained solely for upward compatibility. Note the intentional reversing of 199 * the last two arguments when invoking tparm(). 200 */ 201NCURSES_EXPORT(char *) 202tgoto(const char *string, int x, int y) 203{ 204 char *result; 205 206 T((T_CALLED("tgoto(%s, %d, %d)"), _nc_visbuf(string), x, y)); 207#if !PURE_TERMINFO 208 if (is_termcap(string)) 209 result = tgoto_internal(string, x, y); 210 else 211#endif 212 if ((result = TIPARM_2(string, y, x)) == NULL) { 213 /* 214 * Because termcap did not provide a more general solution such as 215 * tparm(), it was necessary to handle single-parameter capabilities 216 * using tgoto(). The internal _nc_tiparm() function returns a NULL 217 * for that case; retry for the single-parameter case. 218 */ 219 if ((result = TIPARM_1(string, y)) == NULL) { 220 result = TIPARM_0(string); 221 } 222 } 223 returnPtr(result); 224} 225