diff options
Diffstat (limited to 'ncurses-5.3/ncurses/tinfo/comp_scan.c')
| -rw-r--r-- | ncurses-5.3/ncurses/tinfo/comp_scan.c | 831 |
1 files changed, 0 insertions, 831 deletions
diff --git a/ncurses-5.3/ncurses/tinfo/comp_scan.c b/ncurses-5.3/ncurses/tinfo/comp_scan.c deleted file mode 100644 index 0116133..0000000 --- a/ncurses-5.3/ncurses/tinfo/comp_scan.c +++ /dev/null @@ -1,831 +0,0 @@ -/**************************************************************************** - * Copyright (c) 1998-2001,2002 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: Zeyd M. Ben-Halim <zmbenhal@netcom.com> 1992,1995 * - * and: Eric S. Raymond <esr@snark.thyrsus.com> * - ****************************************************************************/ - -/* - * comp_scan.c --- Lexical scanner for terminfo compiler. - * - * _nc_reset_input() - * _nc_get_token() - * _nc_panic_mode() - * int _nc_syntax; - * int _nc_curr_line; - * long _nc_curr_file_pos; - * long _nc_comment_start; - * long _nc_comment_end; - */ - -#include <curses.priv.h> - -#include <ctype.h> -#include <term_entry.h> -#include <tic.h> - -MODULE_ID("$Id$") - -/* - * Maximum length of string capability we'll accept before raising an error. - * Yes, there is a real capability in /etc/termcap this long, an "is". - */ -#define MAXCAPLEN 600 - -#define iswhite(ch) (ch == ' ' || ch == '\t') - -NCURSES_EXPORT_VAR(int) -_nc_syntax = 0; /* termcap or terminfo? */ -NCURSES_EXPORT_VAR(long) -_nc_curr_file_pos = 0; /* file offset of current line */ -NCURSES_EXPORT_VAR(long) -_nc_comment_start = 0; /* start of comment range before name */ -NCURSES_EXPORT_VAR(long) -_nc_comment_end = 0; /* end of comment range before name */ -NCURSES_EXPORT_VAR(long) -_nc_start_line = 0; /* start line of current entry */ - -NCURSES_EXPORT_VAR(struct token) -_nc_curr_token = -{ - 0, 0, 0 -}; - -/***************************************************************************** - * - * Token-grabbing machinery - * - *****************************************************************************/ - -static bool first_column; /* See 'next_char()' below */ -static char separator; /* capability separator */ -static int pushtype; /* type of pushback token */ -static char *pushname; - -#if NCURSES_EXT_FUNCS -NCURSES_EXPORT_VAR(bool) -_nc_disable_period = FALSE; /* used by tic -a option */ -#endif - -static int last_char(void); -static int next_char(void); -static long stream_pos(void); -static bool end_of_stream(void); -static void push_back(char c); - -/* Assume we may be looking at a termcap-style continuation */ -static inline int -eat_escaped_newline(int ch) -{ - if (ch == '\\') - while ((ch = next_char()) == '\n' || iswhite(ch)) - continue; - return ch; -} - -/* - * int - * get_token() - * - * Scans the input for the next token, storing the specifics in the - * global structure 'curr_token' and returning one of the following: - * - * NAMES A line beginning in column 1. 'name' - * will be set to point to everything up to but - * not including the first separator on the line. - * BOOLEAN An entry consisting of a name followed by - * a separator. 'name' will be set to point to - * the name of the capability. - * NUMBER An entry of the form - * name#digits, - * 'name' will be set to point to the capability - * name and 'valnumber' to the number given. - * STRING An entry of the form - * name=characters, - * 'name' is set to the capability name and - * 'valstring' to the string of characters, with - * input translations done. - * CANCEL An entry of the form - * name@, - * 'name' is set to the capability name and - * 'valnumber' to -1. - * EOF The end of the file has been reached. - * - * A `separator' is either a comma or a semicolon, depending on whether - * we are in termcap or terminfo mode. - * - */ - -NCURSES_EXPORT(int) -_nc_get_token(bool silent) -{ - static const char terminfo_punct[] = "@%&*!#"; - static char *buffer; - - char *numchk; - char *ptr; - char numbuf[80]; - int ch; - int dot_flag = FALSE; - int type; - long number; - long token_start; - unsigned found; - - if (pushtype != NO_PUSHBACK) { - int retval = pushtype; - - _nc_set_type(pushname != 0 ? pushname : ""); - DEBUG(3, ("pushed-back token: `%s', class %d", - _nc_curr_token.tk_name, pushtype)); - - pushtype = NO_PUSHBACK; - if (pushname != 0) - pushname[0] = '\0'; - - /* currtok wasn't altered by _nc_push_token() */ - return (retval); - } - - if (end_of_stream()) - return (EOF); - - start_token: - token_start = stream_pos(); - while ((ch = next_char()) == '\n' || iswhite(ch)) - continue; - - ch = eat_escaped_newline(ch); - - if (ch == EOF) - type = EOF; - else { - /* if this is a termcap entry, skip a leading separator */ - if (separator == ':' && ch == ':') - ch = next_char(); - - if (ch == '.' -#if NCURSES_EXT_FUNCS - && !_nc_disable_period -#endif - ) { - dot_flag = TRUE; - DEBUG(8, ("dot-flag set")); - - while ((ch = next_char()) == '.' || iswhite(ch)) - continue; - } - - if (ch == EOF) { - type = EOF; - goto end_of_token; - } - - /* have to make some punctuation chars legal for terminfo */ - if (!isalnum(ch) -#if NCURSES_EXT_FUNCS - && !(ch == '.' && _nc_disable_period) -#endif - && !strchr(terminfo_punct, (char) ch)) { - if (!silent) - _nc_warning("Illegal character (expected alphanumeric or %s) - %s", - terminfo_punct, unctrl((chtype) ch)); - _nc_panic_mode(separator); - goto start_token; - } - - if (buffer == 0) - buffer = typeMalloc(char, MAX_ENTRY_SIZE); - - ptr = buffer; - *(ptr++) = ch; - - if (first_column) { - char *desc; - - _nc_comment_start = token_start; - _nc_comment_end = _nc_curr_file_pos; - _nc_start_line = _nc_curr_line; - - _nc_syntax = ERR; - while ((ch = next_char()) != '\n') { - if (ch == EOF) - _nc_err_abort(MSG_NO_MEMORY); - else if (ch == ':' && last_char() != ',') { - _nc_syntax = SYN_TERMCAP; - separator = ':'; - break; - } else if (ch == ',') { - _nc_syntax = SYN_TERMINFO; - separator = ','; - /* - * Fall-through here is not an accident. The idea is that - * if we see a comma, we figure this is terminfo unless we - * subsequently run into a colon -- but we don't stop - * looking for that colon until hitting a newline. This - * allows commas to be embedded in description fields of - * either syntax. - */ - /* FALLTHRU */ - } else - ch = eat_escaped_newline(ch); - - *ptr++ = ch; - } - ptr[0] = '\0'; - if (_nc_syntax == ERR) { - /* - * Grrr...what we ought to do here is barf, complaining that - * the entry is malformed. But because a couple of name fields - * in the 8.2 termcap file end with |\, we just have to assume - * it's termcap syntax. - */ - _nc_syntax = SYN_TERMCAP; - separator = ':'; - } else if (_nc_syntax == SYN_TERMINFO) { - /* throw away trailing /, *$/ */ - for (--ptr; iswhite(*ptr) || *ptr == ','; ptr--) - continue; - ptr[1] = '\0'; - } - - /* - * This is the soonest we have the terminal name fetched. Set up - * for following warning messages. - */ - ptr = strchr(buffer, '|'); - if (ptr == (char *) NULL) - ptr = buffer + strlen(buffer); - ch = *ptr; - *ptr = '\0'; - _nc_set_type(buffer); - *ptr = ch; - - /* - * Compute the boundary between the aliases and the description - * field for syntax-checking purposes. - */ - desc = strrchr(buffer, '|'); - if (!silent && desc) { - if (*desc == '\0') - _nc_warning("empty longname field"); - else if (strchr(desc, ' ') == (char *) NULL) - _nc_warning("older tic versions may treat the description field as an alias"); - } - if (!desc) - desc = buffer + strlen(buffer); - - /* - * Whitespace in a name field other than the long name can confuse - * rdist and some termcap tools. Slashes are a no-no. Other - * special characters can be dangerous due to shell expansion. - */ - for (ptr = buffer; ptr < desc; ptr++) { - if (isspace(UChar(*ptr))) { - if (!silent) - _nc_warning("whitespace in name or alias field"); - break; - } else if (*ptr == '/') { - if (!silent) - _nc_warning("slashes aren't allowed in names or aliases"); - break; - } else if (strchr("$[]!*?", *ptr)) { - if (!silent) - _nc_warning("dubious character `%c' in name or alias field", *ptr); - break; - } - } - - ptr = buffer; - - _nc_curr_token.tk_name = buffer; - type = NAMES; - } else { - while ((ch = next_char()) != EOF) { - if (!isalnum(ch)) { - if (_nc_syntax == SYN_TERMINFO) { - if (ch != '_') - break; - } else { /* allow ';' for "k;" */ - if (ch != ';') - break; - } - } - *(ptr++) = ch; - } - - *ptr++ = '\0'; - switch (ch) { - case ',': - case ':': - if (ch != separator) - _nc_err_abort("Separator inconsistent with syntax"); - _nc_curr_token.tk_name = buffer; - type = BOOLEAN; - break; - case '@': - if ((ch = next_char()) != separator && !silent) - _nc_warning("Missing separator after `%s', have %s", - buffer, unctrl((chtype) ch)); - _nc_curr_token.tk_name = buffer; - type = CANCEL; - break; - - case '#': - found = 0; - while (isalnum(ch = next_char())) { - numbuf[found++] = ch; - if (found >= sizeof(numbuf) - 1) - break; - } - numbuf[found] = '\0'; - number = strtol(numbuf, &numchk, 0); - if (!silent) { - if (numchk == numbuf) - _nc_warning("no value given for `%s'", buffer); - if ((*numchk != '\0') || (ch != separator)) - _nc_warning("Missing separator"); - } - _nc_curr_token.tk_name = buffer; - _nc_curr_token.tk_valnumber = number; - type = NUMBER; - break; - - case '=': - ch = _nc_trans_string(ptr, buffer + MAX_ENTRY_SIZE); - if (!silent && ch != separator) - _nc_warning("Missing separator"); - _nc_curr_token.tk_name = buffer; - _nc_curr_token.tk_valstring = ptr; - type = STRING; - break; - - case EOF: - type = EOF; - break; - default: - /* just to get rid of the compiler warning */ - type = UNDEF; - if (!silent) - _nc_warning("Illegal character - %s", unctrl((chtype) ch)); - } - } /* end else (first_column == FALSE) */ - } /* end else (ch != EOF) */ - - end_of_token: - -#ifdef TRACE - if (dot_flag == TRUE) - DEBUG(8, ("Commented out ")); - - if (_nc_tracing >= DEBUG_LEVEL(7)) { - switch (type) { - case BOOLEAN: - _tracef("Token: Boolean; name='%s'", - _nc_curr_token.tk_name); - break; - - case NUMBER: - _tracef("Token: Number; name='%s', value=%d", - _nc_curr_token.tk_name, - _nc_curr_token.tk_valnumber); - break; - - case STRING: - _tracef("Token: String; name='%s', value=%s", - _nc_curr_token.tk_name, - _nc_visbuf(_nc_curr_token.tk_valstring)); - break; - - case CANCEL: - _tracef("Token: Cancel; name='%s'", - _nc_curr_token.tk_name); - break; - - case NAMES: - - _tracef("Token: Names; value='%s'", - _nc_curr_token.tk_name); - break; - - case EOF: - _tracef("Token: End of file"); - break; - - default: - _nc_warning("Bad token type"); - } - } -#endif - - if (dot_flag == TRUE) /* if commented out, use the next one */ - type = _nc_get_token(silent); - - DEBUG(3, ("token: `%s', class %d", - _nc_curr_token.tk_name != 0 ? _nc_curr_token.tk_name : - "<null>", - type)); - - return (type); -} - -/* - * char - * trans_string(ptr) - * - * Reads characters using next_char() until encountering a separator, nl, - * or end-of-file. The returned value is the character which caused - * reading to stop. The following translations are done on the input: - * - * ^X goes to ctrl-X (i.e. X & 037) - * {\E,\n,\r,\b,\t,\f} go to - * {ESCAPE,newline,carriage-return,backspace,tab,formfeed} - * {\^,\\} go to {carat,backslash} - * \ddd (for ddd = up to three octal digits) goes to the character ddd - * - * \e == \E - * \0 == \200 - * - */ - -NCURSES_EXPORT(char) -_nc_trans_string(char *ptr, char *last) -{ - int count = 0; - int number = 0; - int i, c; - chtype ch, last_ch = '\0'; - bool ignored = FALSE; - bool long_warning = FALSE; - - while ((ch = c = next_char()) != (chtype) separator && c != EOF) { - if (ptr == (last - 1)) - break; - if ((_nc_syntax == SYN_TERMCAP) && c == '\n') - break; - if (ch == '^' && last_ch != '%') { - ch = c = next_char(); - if (c == EOF) - _nc_err_abort(MSG_NO_INPUTS); - - if (!(is7bits(ch) && isprint(ch))) { - _nc_warning("Illegal ^ character - %s", unctrl(ch)); - } - if (ch == '?') { - *(ptr++) = '\177'; - if (_nc_tracing) - _nc_warning("Allow ^? as synonym for \\177"); - } else { - if ((ch &= 037) == 0) - ch = 128; - *(ptr++) = (char) (ch); - } - } else if (ch == '\\') { - ch = c = next_char(); - if (c == EOF) - _nc_err_abort(MSG_NO_INPUTS); - - if (ch >= '0' && ch <= '7') { - number = ch - '0'; - for (i = 0; i < 2; i++) { - ch = c = next_char(); - if (c == EOF) - _nc_err_abort(MSG_NO_INPUTS); - - if (c < '0' || c > '7') { - if (isdigit(c)) { - _nc_warning("Non-octal digit `%c' in \\ sequence", c); - /* allow the digit; it'll do less harm */ - } else { - push_back((char) c); - break; - } - } - - number = number * 8 + c - '0'; - } - - if (number == 0) - number = 0200; - *(ptr++) = (char) number; - } else { - switch (c) { - case 'E': - case 'e': - *(ptr++) = '\033'; - break; - - case 'a': - *(ptr++) = '\007'; - break; - - case 'l': - case 'n': - *(ptr++) = '\n'; - break; - - case 'r': - *(ptr++) = '\r'; - break; - - case 'b': - *(ptr++) = '\010'; - break; - - case 's': - *(ptr++) = ' '; - break; - - case 'f': - *(ptr++) = '\014'; - break; - - case 't': - *(ptr++) = '\t'; - break; - - case '\\': - *(ptr++) = '\\'; - break; - - case '^': - *(ptr++) = '^'; - break; - - case ',': - *(ptr++) = ','; - break; - - case ':': - *(ptr++) = ':'; - break; - - case '\n': - continue; - - default: - _nc_warning("Illegal character %s in \\ sequence", - unctrl(ch)); - *(ptr++) = (char) ch; - } /* endswitch (ch) */ - } /* endelse (ch < '0' || ch > '7') */ - } - /* end else if (ch == '\\') */ - else if (ch == '\n' && (_nc_syntax == SYN_TERMINFO)) { - /* newlines embedded in a terminfo string are ignored */ - ignored = TRUE; - } else { - *(ptr++) = (char) ch; - } - - if (!ignored) { - last_ch = ch; - count++; - } - ignored = FALSE; - - if (count > MAXCAPLEN && !long_warning) { - _nc_warning("Very long string found. Missing separator?"); - long_warning = TRUE; - } - } /* end while */ - - *ptr = '\0'; - - return (ch); -} - -/* - * _nc_push_token() - * - * Push a token of given type so that it will be reread by the next - * get_token() call. - */ - -NCURSES_EXPORT(void) -_nc_push_token(int tokclass) -{ - /* - * This implementation is kind of bogus, it will fail if we ever do more - * than one pushback at a time between get_token() calls. It relies on the - * fact that _nc_curr_token is static storage that nothing but - * _nc_get_token() touches. - */ - pushtype = tokclass; - if (pushname == 0) - pushname = typeMalloc(char, MAX_NAME_SIZE + 1); - _nc_get_type(pushname); - - DEBUG(3, ("pushing token: `%s', class %d", - _nc_curr_token.tk_name, pushtype)); -} - -/* - * Panic mode error recovery - skip everything until a "ch" is found. - */ -NCURSES_EXPORT(void) -_nc_panic_mode(char ch) -{ - int c; - - for (;;) { - c = next_char(); - if (c == ch) - return; - if (c == EOF) - return; - } -} - -/***************************************************************************** - * - * Character-stream handling - * - *****************************************************************************/ - -#define LEXBUFSIZ 1024 - -static char *bufptr; /* otherwise, the input buffer pointer */ -static char *bufstart; /* start of buffer so we can compute offsets */ -static FILE *yyin; /* scanner's input file descriptor */ - -/* - * _nc_reset_input() - * - * Resets the input-reading routines. Used on initialization, - * or after a seek has been done. Exactly one argument must be - * non-null. - */ - -NCURSES_EXPORT(void) -_nc_reset_input(FILE * fp, char *buf) -{ - pushtype = NO_PUSHBACK; - if (pushname != 0) - pushname[0] = '\0'; - yyin = fp; - bufstart = bufptr = buf; - _nc_curr_file_pos = 0L; - if (fp != 0) - _nc_curr_line = 0; - _nc_curr_col = 0; -} - -/* - * int last_char() - * - * Returns the final nonblank character on the current input buffer - */ -static int -last_char(void) -{ - size_t len = strlen(bufptr); - while (len--) { - if (!isspace(UChar(bufptr[len]))) - return bufptr[len]; - } - return 0; -} - -/* - * int next_char() - * - * Returns the next character in the input stream. Comments and leading - * white space are stripped. - * - * The global state variable 'firstcolumn' is set TRUE if the character - * returned is from the first column of the input line. - * - * The global variable _nc_curr_line is incremented for each new line. - * The global variable _nc_curr_file_pos is set to the file offset of the - * beginning of each line. - */ - -static int -next_char(void) -{ - if (!yyin) { - /* - * An string with an embedded null will truncate the input. This is - * intentional (we don't read binary files here). - */ - if (*bufptr == '\0') - return (EOF); - if (*bufptr == '\n') { - _nc_curr_line++; - _nc_curr_col = 0; - } - } else if (!bufptr || !*bufptr) { - /* - * In theory this could be recoded to do its I/O one character at a - * time, saving the buffer space. In practice, this turns out to be - * quite hard to get completely right. Try it and see. If you - * succeed, don't forget to hack push_back() correspondingly. - */ - static char *result; - static size_t allocated; - size_t used; - size_t len; - - do { - bufstart = 0; - used = 0; - do { - if (used + (LEXBUFSIZ / 4) >= allocated) { - allocated += (allocated + LEXBUFSIZ); - result = typeRealloc(char, allocated, result); - if (result == 0) - return (EOF); - } - if (used == 0) - _nc_curr_file_pos = ftell(yyin); - - if (fgets(result + used, allocated - used, yyin) != NULL) { - bufstart = result; - if (used == 0) { - _nc_curr_line++; - _nc_curr_col = 0; - } - } else { - if (used != 0) - strcat(result, "\n"); - } - if ((bufptr = bufstart) != 0) { - used = strlen(bufptr); - while (iswhite(*bufptr)) - bufptr++; - - /* - * Treat a trailing <cr><lf> the same as a <newline> so we - * can read files on OS/2, etc. - */ - if ((len = strlen(bufptr)) > 1) { - if (bufptr[len - 1] == '\n' - && bufptr[len - 2] == '\r') { - len--; - bufptr[len - 1] = '\n'; - bufptr[len] = '\0'; - } - } - } else { - return (EOF); - } - } while (bufptr[len - 1] != '\n'); /* complete a line */ - } while (result[0] == '#'); /* ignore comments */ - } - - first_column = (bufptr == bufstart); - - _nc_curr_col++; - return (*bufptr++); -} - -static void -push_back(char c) -/* push a character back onto the input stream */ -{ - if (bufptr == bufstart) - _nc_syserr_abort("Can't backspace off beginning of line"); - *--bufptr = c; -} - -static long -stream_pos(void) -/* return our current character position in the input stream */ -{ - return (yyin ? ftell(yyin) : (bufptr ? bufptr - bufstart : 0)); -} - -static bool -end_of_stream(void) -/* are we at end of input? */ -{ - return ((yyin ? feof(yyin) : (bufptr && *bufptr == '\0')) - ? TRUE : FALSE); -} |