X-Git-Url: https://git.stderr.nl/gitweb?a=blobdiff_plain;f=interpreters%2Ffrotz%2Fbuffer.c;fp=interpreters%2Ffrotz%2Fbuffer.c;h=f3a721ecba09e32d73163379c6fd67de9e348e9d;hb=b1f1dc50b22b30c4d7176e1ff7c0805e80fe0724;hp=0000000000000000000000000000000000000000;hpb=50176172d18ae72d019181725c5629d45d21c548;p=projects%2Fchimara%2Fchimara.git diff --git a/interpreters/frotz/buffer.c b/interpreters/frotz/buffer.c new file mode 100644 index 0000000..f3a721e --- /dev/null +++ b/interpreters/frotz/buffer.c @@ -0,0 +1,153 @@ +/* buffer.c - Text buffering and word wrapping + * Copyright (c) 2003 Tor Andersson -- zapped! + * Copyright (c) 1995-1997 Stefan Jokisch + * + * This file is part of Frotz. + * + * Frotz is free software; you can redistribute it and/or modify + * it under the terms of the GNU General Public License as published by + * the Free Software Foundation; either version 2 of the License, or + * (at your option) any later version. + * + * Frotz is distributed in the hope that it will be useful, + * but WITHOUT ANY WARRANTY; without even the implied warranty of + * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the + * GNU General Public License for more details. + * + * You should have received a copy of the GNU General Public License + * along with this program; if not, write to the Free Software + * Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA + */ + +#include "frotz.h" + +extern void stream_char (zchar); +extern void stream_word (const zchar *); +extern void stream_new_line (void); + +static zchar buffer[TEXT_BUFFER_SIZE]; +static int bufpos = 0; + +static zchar prev_c = 0; + +/* + * flush_buffer + * + * Copy the contents of the text buffer to the output streams. + * + */ + +void flush_buffer (void) +{ + static bool locked = FALSE; + + /* Make sure we stop when flush_buffer is called from flush_buffer. + Note that this is difficult to avoid as we might print a newline + during flush_buffer, which might cause a newline interrupt, that + might execute any arbitrary opcode, which might flush the buffer. */ + + if (locked || bufpos == 0) + return; + + /* Send the buffer to the output streams */ + + buffer[bufpos] = 0; + + + locked = TRUE; + + stream_word (buffer); + +#ifdef SPEECH_OUTPUT + os_speech_output(buffer); +#endif + + locked = FALSE; + + /* Reset the buffer */ + + bufpos = 0; + prev_c = 0; + +}/* flush_buffer */ + +/* + * print_char + * + * High level output function. + * + */ + +void print_char (zchar c) +{ + static bool flag = FALSE; + + if (message || ostream_memory || enable_buffering) { + + if (!flag) { + + /* Characters 0 and ZC_RETURN are special cases */ + + if (c == ZC_RETURN) + { new_line (); return; } + if (c == 0) + return; + + /* Flush the buffer before a whitespace or after a hyphen */ + + if (c == ' ' || c == ZC_INDENT || c == ZC_GAP || (prev_c == '-' && c != '-')) + + + flush_buffer (); + + /* Set the flag if this is part one of a style or font change */ + + if (c == ZC_NEW_FONT || c == ZC_NEW_STYLE) + flag = TRUE; + + /* Remember the current character code */ + + prev_c = c; + + } else flag = FALSE; + + /* Insert the character into the buffer */ + + buffer[bufpos++] = c; + + if (bufpos == TEXT_BUFFER_SIZE) + runtime_error (ERR_TEXT_BUF_OVF); + + } else stream_char (c); + +}/* print_char */ + +/* + * new_line + * + * High level newline function. + * + */ + +void new_line (void) +{ + + flush_buffer (); stream_new_line (); + +}/* new_line */ + + +/* + * init_buffer + * + * Initialize buffer variables. + * + */ + +void init_buffer(void) +{ + memset(buffer, 0, sizeof (zchar) * TEXT_BUFFER_SIZE); + bufpos = 0; + prev_c = 0; +} +