2 Copyright (C) 1996-1997 Id Software, Inc.
3 Copyright (C) 2000-2020 DarkPlaces contributors
5 This program is free software; you can redistribute it and/or
6 modify it under the terms of the GNU General Public License
7 as published by the Free Software Foundation; either version 2
8 of the License, or (at your option) any later version.
10 This program is distributed in the hope that it will be useful,
11 but WITHOUT ANY WARRANTY; without even the implied warranty of
12 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.
14 See the GNU General Public License for more details.
16 You should have received a copy of the GNU General Public License
17 along with this program; if not, write to the Free Software
18 Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
30 /// MSVC has a different name for several standard functions
32 # define strcasecmp _stricmp
33 # define strncasecmp _strnicmp
38 // Create our own define for Mac OS X
39 #if defined(__APPLE__) && defined(__MACH__)
44 //============================================================================
46 #define ContainerOf(ptr, type, member) ((type *)((char *)(ptr) - offsetof(type, member)))
48 typedef struct sizebuf_s
50 qbool allowoverflow; ///< if false, do a Sys_Error
51 qbool overflowed; ///< set to true if the buffer size failed
56 qbool badread; // set if a read goes beyond end of message
59 void SZ_Clear (sizebuf_t *buf);
60 unsigned char *SZ_GetSpace (sizebuf_t *buf, int length);
61 void SZ_Write (sizebuf_t *buf, const unsigned char *data, int length);
62 void SZ_HexDumpToConsole(const sizebuf_t *buf);
64 void Com_HexDumpToConsole(const unsigned char *data, int size);
66 unsigned short CRC_Block(const unsigned char *data, size_t size);
67 unsigned short CRC_Block_CaseInsensitive(const unsigned char *data, size_t size); // for hash lookup functions that use strcasecmp for comparison
69 unsigned char COM_BlockSequenceCRCByteQW(unsigned char *base, int length, int sequence);
71 // these are actually md4sum (mdfour.c)
72 unsigned Com_BlockChecksum (void *buffer, int length);
73 void Com_BlockFullChecksum (void *buffer, int len, unsigned char *outbuf);
75 void COM_Init_Commands(void);
78 //============================================================================
80 //============================================================================
82 // check mem_bigendian if you need to know the system byte order
84 /*! \name Byte order functions.
88 // unaligned memory access crashes on some platform, so always read bytes...
89 #define BigShort(l) BuffBigShort((unsigned char *)&(l))
90 #define LittleShort(l) BuffLittleShort((unsigned char *)&(l))
91 #define BigLong(l) BuffBigLong((unsigned char *)&(l))
92 #define LittleLong(l) BuffLittleLong((unsigned char *)&(l))
93 #define BigFloat(l) BuffBigFloat((unsigned char *)&(l))
94 #define LittleFloat(l) BuffLittleFloat((unsigned char *)&(l))
96 /// Extract a big endian 32bit float from the given \p buffer.
97 float BuffBigFloat (const unsigned char *buffer);
99 /// Extract a big endian 32bit int from the given \p buffer.
100 int BuffBigLong (const unsigned char *buffer);
102 /// Extract a big endian 16bit short from the given \p buffer.
103 short BuffBigShort (const unsigned char *buffer);
105 /// Extract a little endian 32bit float from the given \p buffer.
106 float BuffLittleFloat (const unsigned char *buffer);
108 /// Extract a little endian 32bit int from the given \p buffer.
109 int BuffLittleLong (const unsigned char *buffer);
111 /// Extract a little endian 16bit short from the given \p buffer.
112 short BuffLittleShort (const unsigned char *buffer);
114 /// Encode a big endian 32bit int to the given \p buffer
115 void StoreBigLong (unsigned char *buffer, unsigned int i);
117 /// Encode a big endian 16bit int to the given \p buffer
118 void StoreBigShort (unsigned char *buffer, unsigned short i);
120 /// Encode a little endian 32bit int to the given \p buffer
121 void StoreLittleLong (unsigned char *buffer, unsigned int i);
123 /// Encode a little endian 16bit int to the given \p buffer
124 void StoreLittleShort (unsigned char *buffer, unsigned short i);
127 //============================================================================
129 // these versions are purely for internal use, never sent in network protocol
130 // (use Protocol_EnumForNumber and Protocol_NumberToEnum to convert)
131 typedef enum protocolversion_e
134 PROTOCOL_DARKPLACES8, ///< added parting messages. WIP
135 PROTOCOL_DARKPLACES7, ///< added QuakeWorld-style movement protocol to allow more consistent prediction
136 PROTOCOL_DARKPLACES6, ///< various changes
137 PROTOCOL_DARKPLACES5, ///< uses EntityFrame5 entity snapshot encoder/decoder which is based on a Tribes networking article at http://www.garagegames.com/articles/networking1/
138 PROTOCOL_DARKPLACES4, ///< various changes
139 PROTOCOL_DARKPLACES3, ///< uses EntityFrame4 entity snapshot encoder/decoder which is broken, this attempted to do partial snapshot updates on a QuakeWorld-like protocol, but it is broken and impossible to fix
140 PROTOCOL_DARKPLACES2, ///< various changes
141 PROTOCOL_DARKPLACES1, ///< uses EntityFrame entity snapshot encoder/decoder which is a QuakeWorld-like entity snapshot delta compression method
142 PROTOCOL_QUAKEDP, ///< darkplaces extended quake protocol (used by TomazQuake and others), backwards compatible as long as no extended features are used
143 PROTOCOL_NEHAHRAMOVIE, ///< Nehahra movie protocol, a big nasty hack dating back to early days of the Quake Standards Group (but only ever used by neh_gl.exe), this is potentially backwards compatible with quake protocol as long as no extended features are used (but in actuality the neh_gl.exe which wrote this protocol ALWAYS wrote the extended information)
144 PROTOCOL_QUAKE, ///< quake (aka netquake/normalquake/nq) protocol
145 PROTOCOL_QUAKEWORLD, ///< quakeworld protocol
146 PROTOCOL_NEHAHRABJP, ///< same as QUAKEDP but with 16bit modelindex
147 PROTOCOL_NEHAHRABJP2, ///< same as NEHAHRABJP but with 16bit soundindex
148 PROTOCOL_NEHAHRABJP3 ///< same as NEHAHRABJP2 but with some changes
152 /*! \name Message IO functions.
153 * Handles byte ordering and avoids alignment errors
157 void MSG_InitReadBuffer (sizebuf_t *buf, unsigned char *data, int size);
158 void MSG_WriteChar (sizebuf_t *sb, int c);
159 void MSG_WriteByte (sizebuf_t *sb, int c);
160 void MSG_WriteShort (sizebuf_t *sb, int c);
161 void MSG_WriteLong (sizebuf_t *sb, int c);
162 void MSG_WriteFloat (sizebuf_t *sb, vec_t f);
163 void MSG_WriteString (sizebuf_t *sb, const char *s);
164 void MSG_WriteUnterminatedString (sizebuf_t *sb, const char *s);
165 void MSG_WriteAngle8i (sizebuf_t *sb, vec_t f);
166 void MSG_WriteAngle16i (sizebuf_t *sb, vec_t f);
167 void MSG_WriteAngle32f (sizebuf_t *sb, vec_t f);
168 void MSG_WriteCoord13i (sizebuf_t *sb, vec_t f);
169 void MSG_WriteCoord16i (sizebuf_t *sb, vec_t f);
170 void MSG_WriteCoord32f (sizebuf_t *sb, vec_t f);
171 void MSG_WriteCoord (sizebuf_t *sb, vec_t f, protocolversion_t protocol);
172 void MSG_WriteVector (sizebuf_t *sb, const vec3_t v, protocolversion_t protocol);
173 void MSG_WriteAngle (sizebuf_t *sb, vec_t f, protocolversion_t protocol);
175 void MSG_BeginReading (sizebuf_t *sb);
176 int MSG_ReadLittleShort (sizebuf_t *sb);
177 int MSG_ReadBigShort (sizebuf_t *sb);
178 int MSG_ReadLittleLong (sizebuf_t *sb);
179 int MSG_ReadBigLong (sizebuf_t *sb);
180 float MSG_ReadLittleFloat (sizebuf_t *sb);
181 float MSG_ReadBigFloat (sizebuf_t *sb);
182 char *MSG_ReadString (sizebuf_t *sb, char *string, size_t maxstring);
183 int MSG_ReadBytes (sizebuf_t *sb, int numbytes, unsigned char *out);
185 #define MSG_ReadChar(sb) ((sb)->readcount >= (sb)->cursize ? ((sb)->badread = true, -1) : (signed char)(sb)->data[(sb)->readcount++])
186 #define MSG_ReadByte(sb) ((sb)->readcount >= (sb)->cursize ? ((sb)->badread = true, -1) : (unsigned char)(sb)->data[(sb)->readcount++])
187 #define MSG_ReadShort MSG_ReadLittleShort
188 #define MSG_ReadLong MSG_ReadLittleLong
189 #define MSG_ReadFloat MSG_ReadLittleFloat
191 float MSG_ReadAngle8i (sizebuf_t *sb);
192 float MSG_ReadAngle16i (sizebuf_t *sb);
193 float MSG_ReadAngle32f (sizebuf_t *sb);
194 float MSG_ReadCoord13i (sizebuf_t *sb);
195 float MSG_ReadCoord16i (sizebuf_t *sb);
196 float MSG_ReadCoord32f (sizebuf_t *sb);
197 float MSG_ReadCoord (sizebuf_t *sb, protocolversion_t protocol);
198 void MSG_ReadVector (sizebuf_t *sb, vec3_t v, protocolversion_t protocol);
199 float MSG_ReadAngle (sizebuf_t *sb, protocolversion_t protocol);
201 //============================================================================
203 typedef float (*COM_WordWidthFunc_t) (void *passthrough, const char *w, size_t *length, float maxWidth); // length is updated to the longest fitting string into maxWidth; if maxWidth < 0, all characters are used and length is used as is
204 typedef int (*COM_LineProcessorFunc) (void *passthrough, const char *line, size_t length, float width, qbool isContination);
205 int COM_Wordwrap(const char *string, size_t length, float continuationSize, float maxWidth, COM_WordWidthFunc_t wordWidth, void *passthroughCW, COM_LineProcessorFunc processLine, void *passthroughPL);
207 extern char com_token[MAX_INPUTLINE];
209 int COM_ParseToken_Simple(const char **datapointer, qbool returnnewline, qbool parsebackslash, qbool parsecomments);
210 int COM_ParseToken_QuakeC(const char **datapointer, qbool returnnewline);
211 int COM_ParseToken_VM_Tokenize(const char **datapointer, qbool returnnewline);
212 int COM_ParseToken_Console(const char **datapointer);
214 void COM_Init (void);
215 void COM_Shutdown (void);
217 char *va(char *buf, size_t buflen, const char *format, ...) DP_FUNC_PRINTF(3);
218 // does a varargs printf into provided buffer, returns buffer (so it can be called in-line unlike dpsnprintf)
220 // GCC with -Werror=c++-compat will error out if static_assert is used even though the macro is valid C11...
222 #define DP_STATIC_ASSERT(expr, str) _Static_assert(expr, str)
224 #define DP_STATIC_ASSERT(expr, str) static_assert(expr, str)
227 // snprintf and vsnprintf are NOT portable. Use their DP counterparts instead
231 #define snprintf DP_STATIC_ASSERT(0, "snprintf is forbidden for portability reasons. Use dpsnprintf instead.")
235 #define vsnprintf DP_STATIC_ASSERT(0, "vsnprintf is forbidden for portability reasons. Use dpvsnprintf instead.")
237 // dpsnprintf and dpvsnprintf
238 // return the number of printed characters, excluding the final '\0'
239 // or return -1 if the buffer isn't big enough to contain the entire string.
240 // buffer is ALWAYS null-terminated
241 extern int dpsnprintf (char *buffer, size_t buffersize, const char *format, ...) DP_FUNC_PRINTF(3);
242 extern int dpvsnprintf (char *buffer, size_t buffersize, const char *format, va_list args);
244 // A bunch of functions are forbidden for security reasons (and also to please MSVS 2005, for some of them)
245 // LadyHavoc: added #undef lines here to avoid warnings in Linux
247 #define strcat DP_STATIC_ASSERT(0, "strcat is forbidden for security reasons. Use strlcat or memcpy instead.")
249 #define strncat DP_STATIC_ASSERT(0, "strncat is forbidden for security reasons. Use strlcat or memcpy instead.")
251 #define strcpy DP_STATIC_ASSERT(0, "strcpy is forbidden for security reasons. Use strlcpy or memcpy instead.")
253 #define strncpy DP_STATIC_ASSERT(0, "strncpy is forbidden for security reasons. Use strlcpy or memcpy instead.")
255 #define sprintf DP_STATIC_ASSERT(0, "sprintf is forbidden for security reasons. Use dpsnprintf instead.")
258 //============================================================================
260 extern struct cvar_s registered;
261 extern struct cvar_s cmdline;
263 typedef enum userdirmode_e
265 USERDIRMODE_NOHOME, // basedir only
266 USERDIRMODE_HOME, // Windows basedir, general POSIX (~/.)
267 USERDIRMODE_MYGAMES, // pre-Vista (My Documents/My Games/), general POSIX (~/.)
268 USERDIRMODE_SAVEDGAMES, // Vista (%USERPROFILE%/Saved Games/), OSX (~/Library/Application Support/), Linux (~/.config)
273 void COM_ToLowerString (const char *in, char *out, size_t size_out);
274 void COM_ToUpperString (const char *in, char *out, size_t size_out);
275 int COM_StringBeginsWith(const char *s, const char *match);
277 int COM_ReadAndTokenizeLine(const char **text, char **argv, int maxargc, char *tokenbuf, int tokenbufsize, const char *commentprefix);
279 size_t COM_StringLengthNoColors(const char *s, size_t size_s, qbool *valid);
280 qbool COM_StringDecolorize(const char *in, size_t size_in, char *out, size_t size_out, qbool escape_carets);
281 void COM_ToLowerString (const char *in, char *out, size_t size_out);
282 void COM_ToUpperString (const char *in, char *out, size_t size_out);
284 // strlcat and strlcpy, from OpenBSD
285 // Most (all?) BSDs already have them
286 #if defined(__OpenBSD__) || defined(__NetBSD__) || defined(__FreeBSD__) || defined(MACOSX)
287 # define HAVE_STRLCAT 1
288 # define HAVE_STRLCPY 1
293 * Appends src to string dst of size dsize (unlike strncat, dsize is the
294 * full size of dst, not space left). At most dsize-1 characters
295 * will be copied. Always NUL terminates (unless dsize <= strlen(dst)).
296 * Returns strlen(src) + MIN(dsize, strlen(initial dst)).
297 * If retval >= dsize, truncation occurred.
299 size_t strlcat(char *dst, const char *src, size_t dsize);
300 #endif // #ifndef HAVE_STRLCAT
304 * Copy string src to buffer dst of size dsize. At most dsize-1
305 * chars will be copied. Always NUL terminates (unless dsize == 0).
306 * Returns strlen(src); if retval >= dsize, truncation occurred.
308 size_t strlcpy(char *dst, const char *src, size_t dsize);
310 #endif // #ifndef HAVE_STRLCPY
312 void FindFraction(double val, int *num, int *denom, int denomMax);
314 // decodes XPM file to XPM array (as if #include'd)
315 char **XPM_DecodeString(const char *in);
317 size_t base64_encode(unsigned char *buf, size_t buflen, size_t outbuflen);
319 #define ARRAY_SIZE(a) (sizeof(a) / sizeof((a)[0]))
321 float Com_CalcRoll (const vec3_t angles, const vec3_t velocity, const vec_t angleval, const vec_t velocityval);