diff options
Diffstat (limited to 'ncurses/tinfo/comp_scan.c')
| -rw-r--r-- | ncurses/tinfo/comp_scan.c | 171 |
1 files changed, 124 insertions, 47 deletions
diff --git a/ncurses/tinfo/comp_scan.c b/ncurses/tinfo/comp_scan.c index 8725b2e..fe6e8e7 100644 --- a/ncurses/tinfo/comp_scan.c +++ b/ncurses/tinfo/comp_scan.c @@ -1,5 +1,5 @@ /**************************************************************************** - * Copyright (c) 1998-2008,2010 Free Software Foundation, Inc. * + * Copyright (c) 1998-2012,2013 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 * @@ -50,7 +50,7 @@ #include <ctype.h> #include <tic.h> -MODULE_ID("$Id: comp_scan.c,v 1.89 2010/12/25 23:06:37 tom Exp $") +MODULE_ID("$Id: comp_scan.c,v 1.102 2013/11/16 19:57:50 tom Exp $") /* * Maximum length of string capability we'll accept before raising an error. @@ -61,6 +61,7 @@ MODULE_ID("$Id: comp_scan.c,v 1.89 2010/12/25 23:06:37 tom Exp $") #define iswhite(ch) (ch == ' ' || ch == '\t') NCURSES_EXPORT_VAR (int) _nc_syntax = 0; /* termcap or terminfo? */ +NCURSES_EXPORT_VAR (int) _nc_strict_bsd = 1; /* ncurses extended termcap? */ 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 */ @@ -127,14 +128,19 @@ _nc_reset_input(FILE *fp, char *buf) * Returns the final nonblank character on the current input buffer */ static int -last_char(void) +last_char(int from_end) { size_t len = strlen(bufptr); + int result = 0; + while (len--) { - if (!isspace(UChar(bufptr[len]))) - return bufptr[len]; + if (!isspace(UChar(bufptr[len]))) { + if (from_end < (int) len) + result = bufptr[(int) len - from_end]; + break; + } } - return 0; + return result; } /* @@ -195,7 +201,8 @@ next_char(void) result = typeRealloc(char, allocated, result); if (result == 0) return (EOF); - bufstart = result; + if (bufstart) + bufstart = result; } if (used == 0) _nc_curr_file_pos = ftell(yyin); @@ -212,7 +219,7 @@ next_char(void) } } else { if (used != 0) - strcat(result, "\n"); + _nc_STRCAT(result, "\n", allocated); } if ((bufptr = bufstart) != 0) { used = strlen(bufptr); @@ -256,12 +263,12 @@ next_char(void) } static void -push_back(char c) +push_back(int c) /* push a character back onto the input stream */ { if (bufptr == bufstart) _nc_syserr_abort("Can't backspace off beginning of line"); - *--bufptr = c; + *--bufptr = (char) c; _nc_curr_col--; } @@ -299,6 +306,8 @@ eat_escaped_newline(int ch) *tok_ptr++ = (char) ch; \ *tok_ptr = '\0' +static char *tok_buf; + /* * int * get_token() @@ -336,15 +345,14 @@ NCURSES_EXPORT(int) _nc_get_token(bool silent) { static const char terminfo_punct[] = "@%&*!#"; - static char *tok_buf; - char *after_list; - char *after_name; + char *after_name; /* after primary name */ + char *after_list; /* after primary and alias list */ char *numchk; char *tok_ptr; char *s; char numbuf[80]; - int ch; + int ch, c0, c1; int dot_flag = FALSE; int type; long number; @@ -372,11 +380,10 @@ _nc_get_token(bool silent) if (end_of_stream()) { yyin = 0; - next_char(); /* frees its allocated memory */ + (void) next_char(); /* frees its allocated memory */ if (tok_buf != 0) { if (_nc_curr_token.tk_name == tok_buf) _nc_curr_token.tk_name = 0; - FreeAndNull(tok_buf); } return (EOF); } @@ -390,6 +397,7 @@ _nc_get_token(bool silent) } ch = eat_escaped_newline(ch); + _nc_curr_token.tk_valstring = 0; #ifdef TRACE old_line = _nc_curr_line; @@ -424,7 +432,7 @@ _nc_get_token(bool silent) #if NCURSES_EXT_FUNCS && !(ch == '.' && _nc_disable_period) #endif - && !strchr(terminfo_punct, (char) ch)) { + && ((strchr) (terminfo_punct, (char) ch) == 0)) { if (!silent) _nc_warning("Illegal character (expected alphanumeric or %s) - '%s'", terminfo_punct, unctrl(UChar(ch))); @@ -457,7 +465,7 @@ _nc_get_token(bool silent) after_list = tok_ptr; if (after_name == 0) after_name = tok_ptr; - } else if (ch == ':' && last_char() != ',') { + } else if (ch == ':' && last_char(0) != ',') { _nc_syntax = SYN_TERMCAP; separator = ':'; break; @@ -471,12 +479,64 @@ _nc_get_token(bool silent) if (after_name == 0) break; /* - * If we see a comma, we assume this is terminfo unless we - * subsequently run into a colon. But we don't stop - * looking for a colon until hitting a newline. This - * allows commas to be embedded in description fields of - * either syntax. + * We saw a comma, but are not entirely sure this is + * terminfo format, since we can still be parsing the + * description field (for either syntax). + * + * A properly formatted termcap line ends with either a + * colon, or a backslash after a colon. It is possible + * to have a backslash in the middle of a capability, but + * then there would be no leading whitespace on the next + * line - something we want to discourage. */ + c0 = last_char(0); + c1 = last_char(1); + if (c1 != ':' && c0 != '\\' && c0 != ':') { + bool capability = FALSE; + + /* + * Since it is not termcap, assume the line is terminfo + * format. However, the comma can be embedded in a + * description field. It also can be a separator + * between a description field and a capability. + * + * Improve the guess by checking if the next word after + * the comma does not look like a capability. In that + * case, extend the description past the comma. + */ + for (s = bufptr; isspace(UChar(*s)); ++s) { + ; + } + if (islower(UChar(*s))) { + char *name = s; + while (isalnum(UChar(*s))) { + ++s; + } + if (*s == '#' || *s == '=' || *s == '@') { + /* + * Checking solely with syntax allows us to + * support extended capabilities with string + * values. + */ + capability = TRUE; + } else if (*s == ',') { + c0 = *s; + *s = '\0'; + /* + * Otherwise, we can handle predefined boolean + * capabilities, still aided by syntax. + */ + if (_nc_find_entry(name, + _nc_get_hash_table(FALSE))) { + capability = TRUE; + } + *s = (char) c0; + } + } + if (capability) { + break; + } + } } else ch = eat_escaped_newline(ch); @@ -748,7 +808,7 @@ _nc_trans_string(char *ptr, char *last) if (!(is7bits(c) && isprint(c))) { _nc_warning("Illegal ^ character - '%s'", unctrl(UChar(c))); } - if (c == '?') { + if (c == '?' && (_nc_syntax != SYN_TERMCAP)) { *(ptr++) = '\177'; if (_nc_tracing) _nc_warning("Allow ^? as synonym for \\177"); @@ -758,23 +818,29 @@ _nc_trans_string(char *ptr, char *last) *(ptr++) = (char) (c); } } else if (c == '\\') { + bool strict_bsd = ((_nc_syntax == SYN_TERMCAP) && _nc_strict_bsd); + c = next_char(); if (c == EOF) _nc_err_abort(MSG_NO_INPUTS); - if (c >= '0' && c <= '7') { +#define isoctal(c) ((c) >= '0' && (c) <= '7') + + if (isoctal(c) || (strict_bsd && isdigit(c))) { number = c - '0'; for (i = 0; i < 2; i++) { c = next_char(); if (c == EOF) _nc_err_abort(MSG_NO_INPUTS); - if (c < '0' || c > '7') { + if (!isoctal(c)) { if (isdigit(c)) { - _nc_warning("Non-octal digit `%c' in \\ sequence", c); - /* allow the digit; it'll do less harm */ + if (!strict_bsd) { + _nc_warning("Non-octal digit `%c' in \\ sequence", c); + /* allow the digit; it'll do less harm */ + } } else { - push_back((char) c); + push_back(c); break; } } @@ -782,21 +848,16 @@ _nc_trans_string(char *ptr, char *last) number = number * 8 + c - '0'; } - if (number == 0) + number = UChar(number); + if (number == 0 && !strict_bsd) 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; @@ -809,10 +870,6 @@ _nc_trans_string(char *ptr, char *last) *(ptr++) = '\010'; break; - case 's': - *(ptr++) = ' '; - break; - case 'f': *(ptr++) = '\014'; break; @@ -833,16 +890,33 @@ _nc_trans_string(char *ptr, char *last) *(ptr++) = ','; break; - case ':': - *(ptr++) = ':'; - break; - case '\n': continue; default: - _nc_warning("Illegal character '%s' in \\ sequence", - unctrl(UChar(c))); + if ((_nc_syntax == SYN_TERMINFO) || !_nc_strict_bsd) { + switch (c) { + case 'a': + c = '\007'; + break; + case 'e': + c = '\033'; + break; + case 'l': + c = '\n'; + break; + case 's': + c = ' '; + break; + case ':': + c = ':'; + break; + default: + _nc_warning("Illegal character '%s' in \\ sequence", + unctrl(UChar(c))); + break; + } + } /* FALLTHRU */ case '|': *(ptr++) = (char) c; @@ -862,7 +936,7 @@ _nc_trans_string(char *ptr, char *last) if (!ignored) { if (_nc_curr_col <= 1) { - push_back((char) c); + push_back(c); c = '\n'; break; } @@ -934,5 +1008,8 @@ _nc_comp_scan_leaks(void) if (pushname != 0) { FreeAndNull(pushname); } + if (tok_buf != 0) { + FreeAndNull(tok_buf); + } } #endif |