/* $OpenBSD: comp_expand.c,v 1.8 2023/10/17 09:52:09 nicm Exp $ */ /**************************************************************************** * Copyright 2020-2021,2023 Thomas E. Dickey * * Copyright 1998-2016,2017 Free Software Foundation, Inc. * * * * Permission is hereby granted, free of charge, to any person obtaining a * * copy of this software and associated documentation files (the * * "Software"), to deal in the Software without restriction, including * * without limitation the rights to use, copy, modify, merge, publish, * * distribute, distribute with modifications, sublicense, and/or sell * * copies of the Software, and to permit persons to whom the Software is * * furnished to do so, subject to the following conditions: * * * * The above copyright notice and this permission notice shall be included * * in all copies or substantial portions of the Software. * * * * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS * * OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF * * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. * * IN NO EVENT SHALL THE ABOVE COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, * * DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR * * OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR * * THE USE OR OTHER DEALINGS IN THE SOFTWARE. * * * * Except as contained in this notice, the name(s) of the above copyright * * holders shall not be used in advertising or otherwise to promote the * * sale, use or other dealings in this Software without prior written * * authorization. * ****************************************************************************/ /**************************************************************************** * Author: Thomas E. Dickey 1998 * ****************************************************************************/ #include #include #include MODULE_ID("$Id: comp_expand.c,v 1.8 2023/10/17 09:52:09 nicm Exp $") #if 0 #define DEBUG_THIS(p) DEBUG(9, p) #else #define DEBUG_THIS(p) /* nothing */ #endif static int trailing_spaces(const char *src) { while (*src == ' ') src++; return *src == 0; } /* this deals with differences over whether 0x7f and 0x80..0x9f are controls */ #define REALPRINT(s) (UChar(*(s)) < 127 && isprint(UChar(*(s)))) #define P_LIMIT(p) (length - (size_t)(p)) NCURSES_EXPORT(char *) _nc_tic_expand(const char *srcp, bool tic_format, int numbers) { static char *buffer; static size_t length; int bufp; const char *str = VALID_STRING(srcp) ? srcp : "\0\0"; size_t need = (2 + strlen(str)) * 4; int ch; int octals = 0; struct { int ch; int offset; } fixups[MAX_TC_FIXUPS]; if (srcp == 0) { #if NO_LEAKS if (buffer != 0) { FreeAndNull(buffer); length = 0; } #endif return 0; } if (buffer == 0 || need > length) { if ((buffer = typeRealloc(char, length = need, buffer)) == 0) return 0; } DEBUG_THIS(("_nc_tic_expand %s:%s:%s", tic_format ? "ti" : "tc", numbers ? "#" : "", _nc_visbuf(srcp))); bufp = 0; while ((ch = UChar(*str)) != 0) { if (ch == '%' && REALPRINT(str + 1)) { buffer[bufp++] = *str++; /* * Though the character literals are more compact, most * terminal descriptions use numbers and are not easy * to read in character-literal form. */ switch (numbers) { case -1: if (str[0] == S_QUOTE && str[1] != '\\' && REALPRINT(str + 1) && str[2] == S_QUOTE) { _nc_SPRINTF(buffer + bufp, _nc_SLIMIT(P_LIMIT(bufp)) "{%d}", str[1]); bufp += (int) strlen(buffer + bufp); str += 2; } else { buffer[bufp++] = *str; } break; /* * If we have a "%{number}", try to translate it into * a "%'char'" form, since that will run a little faster * when we're interpreting it. Also, having one form * for the constant makes it simpler to compare terminal * descriptions. */ case 1: if (str[0] == L_BRACE && isdigit(UChar(str[1]))) { char *dst = 0; long value = strtol(str + 1, &dst, 0); if (dst != 0 && *dst == R_BRACE && value < 127 && isprint((int) value)) { ch = (int) value; buffer[bufp++] = S_QUOTE; if (ch == '\\' || ch == S_QUOTE) buffer[bufp++] = '\\'; buffer[bufp++] = (char) ch; buffer[bufp++] = S_QUOTE; str = dst; } else { buffer[bufp++] = *str; } } else { buffer[bufp++] = *str; } break; default: if (*str == ',') /* minitel1 uses this */ buffer[bufp++] = '\\'; buffer[bufp++] = *str; break; } } else if (ch == 128) { buffer[bufp++] = '\\'; buffer[bufp++] = '0'; } else if (ch == '\033') { buffer[bufp++] = '\\'; buffer[bufp++] = 'E'; } else if (ch == '\\' && tic_format && (str == srcp || str[-1] != '^')) { buffer[bufp++] = '\\'; buffer[bufp++] = '\\'; } else if (ch == ' ' && tic_format && (str == srcp || trailing_spaces(str))) { buffer[bufp++] = '\\'; buffer[bufp++] = 's'; } else if ((ch == ',' || ch == '^') && tic_format) { buffer[bufp++] = '\\'; buffer[bufp++] = (char) ch; } else if (REALPRINT(str) && (ch != ',' && !(ch == ':' && !tic_format) && !(ch == '!' && !tic_format) && ch != '^')) buffer[bufp++] = (char) ch; else if (ch == '\r') { buffer[bufp++] = '\\'; buffer[bufp++] = 'r'; } else if (ch == '\n') { buffer[bufp++] = '\\'; buffer[bufp++] = 'n'; } #define UnCtl(c) ((c) + '@') else if (UChar(ch) < 32 && isdigit(UChar(str[1]))) { _nc_SPRINTF(&buffer[bufp], _nc_SLIMIT(P_LIMIT(bufp)) "^%c", UnCtl(ch)); bufp += 2; } else { _nc_SPRINTF(&buffer[bufp], _nc_SLIMIT(P_LIMIT(bufp)) "\\%03o", ch); if ((octals < MAX_TC_FIXUPS) && ((tic_format && (ch == 127)) || ch < 32)) { fixups[octals].ch = UChar(ch); fixups[octals].offset = bufp; ++octals; } bufp += 4; } str++; } buffer[bufp] = '\0'; /* * If most of a short string is ASCII control characters, reformat the * string to show those in up-arrow format. For longer strings, it is * more likely that the characters are just binary coding. * * If we're formatting termcap, just use the shorter format (up-arrows). */ if (octals != 0 && (!tic_format || (bufp - (4 * octals)) < MIN_TC_FIXUPS)) { while (--octals >= 0) { char *p = buffer + fixups[octals].offset; *p++ = '^'; *p++ = (char) ((fixups[octals].ch == 127) ? '?' : (fixups[octals].ch + (int) '@')); while ((p[0] = p[2]) != 0) { ++p; } } } DEBUG_THIS(("... %s", _nc_visbuf(buffer))); return (buffer); }