| /**************************************************************************** |
| * Copyright 2020 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 <curses.priv.h> |
| |
| #include <ctype.h> |
| #include <tic.h> |
| |
| MODULE_ID("$Id: comp_expand.c,v 1.32 2020/02/02 23:34:34 tom 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", _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 |
| && value != '\\' /* FIXME */ |
| && 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 == ':' || ch == '^') && tic_format) { |
| buffer[bufp++] = '\\'; |
| buffer[bufp++] = (char) ch; |
| } else if (REALPRINT(str) |
| && (ch != ',' |
| && ch != ':' |
| && !(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's |
| * 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); |
| } |