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1 /*
2  * Copyright (C) 2012
3  *     Dale Weiler, Wolfgang Bumiller
4  *
5  * Permission is hereby granted, free of charge, to any person obtaining a copy of
6  * this software and associated documentation files (the "Software"), to deal in
7  * the Software without restriction, including without limitation the rights to
8  * use, copy, modify, merge, publish, distribute, sublicense, and/or sell copies
9  * of the Software, and to permit persons to whom the Software is furnished to do
10  * so, subject to the following conditions:
11  *
12  * The above copyright notice and this permission notice shall be included in all
13  * copies or substantial portions of the Software.
14  *
15  * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
16  * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
17  * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
18  * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
19  * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
20  * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
21  * SOFTWARE.
22  */
23 #ifndef GMQCC_HDR
24 #define GMQCC_HDR
25 #include <limits.h>
26 #include <stdlib.h>
27 #include <string.h>
28 #include <stdio.h>
29 #include <ctype.h>
30
31 #define GMQCC_VERSION_MAJOR 0
32 #define GMQCC_VERSION_MINOR 1
33 #define GMQCC_VERSION_PATCH 0
34 #define GMQCC_VERSION_BUILD(J,N,P) (((J)<<16)|((N)<<8)|(P))
35 #define GMQCC_VERSION \
36     GMQCC_VERSION_BUILD(GMQCC_VERSION_MAJOR, GMQCC_VERSION_MINOR, GMQCC_VERSION_PATCH)
37
38 /*
39  * We cannoy rely on C99 at all, since compilers like MSVC
40  * simply don't support it.  We define our own boolean type
41  * as a result (since we cannot include <stdbool.h>). For
42  * compilers that are in 1999 mode (C99 compliant) we can use
43  * the language keyword _Bool which can allow for better code
44  * on GCC and GCC-like compilers, opposed to `int`.
45  */
46 #ifndef __cplusplus
47 #   ifdef  false
48 #       undef  false
49 #   endif /* !false */
50 #   ifdef  true
51 #       undef true
52 #   endif /* !true  */
53 #   define false (0)
54 #   define true  (1)
55 #   ifdef __STDC_VERSION__
56 #       if __STDC_VERSION__ < 199901L && __GNUC__ < 3
57             typedef int  bool;
58 #       else
59             typedef _Bool bool;
60 #       endif
61 #   else
62         typedef int bool;
63 #   endif /* !__STDC_VERSION__ */
64 #endif    /* !__cplusplus      */
65
66 /*
67  * Of some functions which are generated we want to make sure
68  * that the result isn't ignored. To find such function calls,
69  * we use this macro.
70  */
71 #if defined(__GNUC__) || defined(__CLANG__)
72 #   define GMQCC_WARN __attribute__((warn_unused_result))
73 #else
74 #   define GMQCC_WARN
75 #endif
76 /*
77  * This is a hack to silent clang regarding empty
78  * body if statements.
79  */
80 #define GMQCC_SUPPRESS_EMPTY_BODY do { } while (0)
81
82 /*
83  * Inline is not supported in < C90, however some compilers
84  * like gcc and clang might have an inline attribute we can
85  * use if present.
86  */
87 #ifdef __STDC_VERSION__
88 #    if __STDC_VERSION__ < 199901L
89 #       if defined(__GNUC__) || defined (__CLANG__)
90 #           if __GNUC__ < 2
91 #               define GMQCC_INLINE
92 #           else
93 #               define GMQCC_INLINE __attribute__ ((always_inline))
94 #           endif
95 #       else
96 #           define GMQCC_INLINE
97 #       endif
98 #    else
99 #       define GMQCC_INLINE inline
100 #    endif
101 #else
102 #    define GMQCC_INLINE
103 #endif /* !__STDC_VERSION__ */
104
105 /*
106  * noreturn is present in GCC and clang
107  * it's required for _ast_node_destory otherwise -Wmissing-noreturn
108  * in clang complains about there being no return since abort() is
109  * called.
110  */
111 #if (defined(__GNUC__) && __GNUC__ >= 2) || defined(__CLANG__)
112 #    define GMQCC_NORETURN __attribute__ ((noreturn))
113 #else
114 #    define GMQCC_NORETURN
115 #endif
116
117 /*
118  * stdint.h and inttypes.h -less subset
119  * for systems that don't have it, which we must
120  * assume is all systems. (int8_t not required)
121  */
122 #if   CHAR_MIN  == -128
123     typedef unsigned char  uint8_t; /* same as below */
124 #elif SCHAR_MIN == -128
125     typedef unsigned char  uint8_t; /* same as above */
126 #endif
127 #if   SHRT_MAX  == 0x7FFF
128     typedef short          int16_t;
129     typedef unsigned short uint16_t;
130 #elif INT_MAX   == 0x7FFF
131     typedef int            int16_t;
132     typedef unsigned int   uint16_t;
133 #endif
134 #if   INT_MAX   == 0x7FFFFFFF
135     typedef int            int32_t;
136     typedef unsigned int   uint32_t;
137     typedef long           int64_t;
138     typedef unsigned long  uint64_t;
139 #elif LONG_MAX  == 0x7FFFFFFF
140     typedef long           int32_t;
141     typedef unsigned long  uint32_t;
142
143     /*
144      * It's nearly impossible to figure out a 64bit type at
145      * this point without making assumptions about the build
146      * enviroment.  So if clang or gcc is detected use some
147      * compiler builtins to create a 64 signed and unsigned
148      * type.
149      */
150 #   if defined(__GNUC__) || defined (__CLANG__)
151         typedef int          int64_t  __attribute__((__mode__(__DI__)));
152         typedef unsigned int uint64_t __attribute__((__mode__(__DI__)));
153 #   else
154         /*
155          * Incoorectly size the types so static assertions below will
156          * fail.  There is no valid way to get a 64bit type at this point
157          * without making assumptions of too many things.
158          */
159         typedef struct { char _fail : 0; } int64_t;
160         typedef struct { char _fail : 0; } uint64_t;
161 #   endif
162 #endif
163 #ifdef _LP64 /* long pointer == 64 */
164     typedef unsigned long  uintptr_t;
165     typedef long           intptr_t;
166 #else
167     typedef unsigned int   uintptr_t;
168     typedef int            intptr_t;
169 #endif
170 /* Ensure type sizes are correct: */
171 typedef char uint8_size_is_correct  [sizeof(uint8_t)  == 1?1:-1];
172 typedef char uint16_size_is_correct [sizeof(uint16_t) == 2?1:-1];
173 typedef char uint32_size_is_correct [sizeof(uint32_t) == 4?1:-1];
174 typedef char uint64_size_is_correct [sizeof(uint64_t) == 8?1:-1];
175 typedef char int16_size_if_correct  [sizeof(int16_t)  == 2?1:-1];
176 typedef char int32_size_is_correct  [sizeof(int32_t)  == 4?1:-1];
177 typedef char int64_size_is_correct  [sizeof(int64_t)  == 8?1:-1];
178 /* intptr_t / uintptr_t correct size check */
179 typedef char uintptr_size_is_correct[sizeof(intptr_t) == sizeof(int*)?1:-1];
180 typedef char intptr_size_is_correct [sizeof(uintptr_t)== sizeof(int*)?1:-1];
181
182 /*===================================================================*/
183 /*=========================== util.c ================================*/
184 /*===================================================================*/
185 void *util_memory_a      (unsigned int, unsigned int, const char *);
186 void  util_memory_d      (void       *, unsigned int, const char *);
187 void  util_meminfo       ();
188
189 bool  util_strupper      (const char *);
190 bool  util_strdigit      (const char *);
191 bool  util_strncmpexact  (const char *, const char *, size_t);
192 char *util_strdup        (const char *);
193 char *util_strrq         (const char *);
194 char *util_strrnl        (const char *);
195 char *util_strsws        (const char *);
196 char *util_strchp        (const char *, const char *);
197 void  util_debug         (const char *, const char *, ...);
198 int   util_getline       (char **, size_t *, FILE *);
199 void  util_endianswap    (void *,  int, int);
200
201 size_t util_strtocmd    (const char *, char *, size_t);
202 size_t util_strtononcmd (const char *, char *, size_t);
203
204 uint32_t util_crc32(const char *, int, register const short);
205
206 #ifdef NOTRACK
207 #    define mem_a(x) malloc(x)
208 #    define mem_d(x) free  (x)
209 #else
210 #    define mem_a(x) util_memory_a((x), __LINE__, __FILE__)
211 #    define mem_d(x) util_memory_d((x), __LINE__, __FILE__)
212 #endif
213
214 /*
215  * TODO: make these safer to use.  Currently this only works on
216  * x86 and x86_64, some systems will likely not like this. Such
217  * as BE systems.
218  */
219 #define FLT2INT(Y) *((int32_t*)&(Y))
220 #define INT2FLT(Y) *((float  *)&(Y))
221
222 /* Builds vector type (usefull for inside structures) */
223 #define VECTOR_SNAP(X,Y) X ## Y
224 #define VECTOR_FILL(X,Y) VECTOR_SNAP(X,Y)
225 #define VECTOR_TYPE(T,N)                                        \
226     T*     N##_data      = NULL;                                \
227     long   N##_elements  = 0;                                   \
228     long   N##_allocated = 0
229 /* Builds vector add */
230 #define VECTOR_CORE(T,N)                                        \
231     int    N##_add(T element) {                                 \
232         void *temp = NULL;                                      \
233         if (N##_elements == N##_allocated) {                    \
234             if (N##_allocated == 0) {                           \
235                 N##_allocated = 12;                             \
236             } else {                                            \
237                 N##_allocated *= 2;                             \
238             }                                                   \
239             if  (!(temp = mem_a(N##_allocated * sizeof(T)))) {  \
240                 mem_d(temp);                                    \
241                 return -1;                                      \
242             }                                                   \
243             memcpy(temp, N##_data, (N##_elements * sizeof(T))); \
244             mem_d(N##_data);                                    \
245             N##_data = (T*)temp;                                \
246         }                                                       \
247         N##_data[N##_elements] = element;                       \
248         return   N##_elements++;                                \
249     }                                                           \
250     int N##_put(T* elements, size_t len) {                      \
251         len     --;                                             \
252         elements--;                                             \
253         while (N##_add(*++elements) != -1 && len--);            \
254         return N##_elements;                                    \
255     }                                                           \
256     typedef char VECTOR_FILL(extra_semicolon_,__COUNTER__)
257 #define VECTOR_PROT(T,N)                                        \
258     extern T*     N##_data     ;                                \
259     extern long   N##_elements ;                                \
260     extern long   N##_allocated;                                \
261     int           N##_add(T);                                   \
262     int           N##_put(T *, size_t)
263 #define VECTOR_MAKE(T,N) \
264     VECTOR_TYPE(T,N);    \
265     VECTOR_CORE(T,N)
266
267 /*===================================================================*/
268 /*=========================== code.c ================================*/
269 /*===================================================================*/
270
271 /* Note: if you change the order, fix type_sizeof in ir.c */
272 enum {
273     TYPE_VOID     ,
274     TYPE_STRING   ,
275     TYPE_FLOAT    ,
276     TYPE_VECTOR   ,
277     TYPE_ENTITY   ,
278     TYPE_FIELD    ,
279     TYPE_FUNCTION ,
280     TYPE_POINTER  ,
281     TYPE_INTEGER  ,
282     TYPE_QUATERNION  ,
283     TYPE_MATRIX  ,
284     TYPE_VARIANT  ,
285
286     TYPE_COUNT
287 };
288
289 extern const char *type_name[TYPE_COUNT];
290
291 extern size_t type_sizeof[TYPE_COUNT];
292 extern uint16_t type_store_instr[TYPE_COUNT];
293 /* could use type_store_instr + INSTR_STOREP_F - INSTR_STORE_F
294  * but this breaks when TYPE_INTEGER is added, since with the enhanced
295  * instruction set, the old ones are left untouched, thus the _I instructions
296  * are at a seperate place.
297  */
298 extern uint16_t type_storep_instr[TYPE_COUNT];
299
300 typedef struct {
301     uint32_t offset;      /* Offset in file of where data begins  */
302     uint32_t length;      /* Length of section (how many of)      */
303 } prog_section;
304
305 typedef struct {
306     uint32_t     version;      /* Program version (6)     */
307     uint16_t     crc16;        /* What is this?           */
308     uint16_t     skip;         /* see propsal.txt         */
309
310     prog_section statements;   /* prog_section_statement  */
311     prog_section defs;         /* prog_section_def        */
312     prog_section fields;       /* prog_section_field      */
313     prog_section functions;    /* prog_section_function   */
314     prog_section strings;      /* What is this?           */
315     prog_section globals;      /* What is this?           */
316     uint32_t     entfield;     /* Number of entity fields */
317 } prog_header;
318
319 /*
320  * Each paramater incerements by 3 since vector types hold
321  * 3 components (x,y,z).
322  */
323 #define OFS_NULL      0
324 #define OFS_RETURN    1
325 #define OFS_PARM0     (OFS_RETURN+3)
326 #define OFS_PARM1     (OFS_PARM0 +3)
327 #define OFS_PARM2     (OFS_PARM1 +3)
328 #define OFS_PARM3     (OFS_PARM2 +3)
329 #define OFS_PARM4     (OFS_PARM3 +3)
330 #define OFS_PARM5     (OFS_PARM4 +3)
331 #define OFS_PARM6     (OFS_PARM5 +3)
332 #define OFS_PARM7     (OFS_PARM6 +3)
333
334 typedef struct {
335     uint16_t opcode;
336
337     /* operand 1 */
338     union {
339         int16_t  s1; /* signed   */
340         uint16_t u1; /* unsigned */
341     } o1;
342     /* operand 2 */
343     union {
344         int16_t  s1; /* signed   */
345         uint16_t u1; /* unsigned */
346     } o2;
347     /* operand 3 */
348     union {
349         int16_t  s1; /* signed   */
350         uint16_t u1; /* unsigned */
351     } o3;
352
353     /*
354      * This is the same as the structure in darkplaces
355      * {
356      *     unsigned short op;
357      *     short          a,b,c;
358      * }
359      * But this one is more sane to work with, and the
360      * type sizes are guranteed.
361      */
362 } prog_section_statement;
363
364 typedef struct {
365     /* The types:
366      * 0 = ev_void
367      * 1 = ev_string
368      * 2 = ev_float
369      * 3 = ev_vector
370      * 4 = ev_entity
371      * 5 = ev_field
372      * 6 = ev_function
373      * 7 = ev_pointer -- engine only
374      * 8 = ev_bad     -- engine only
375      */
376     uint16_t type;
377     uint16_t offset;
378     uint32_t name;
379 } prog_section_both;
380 typedef prog_section_both prog_section_def;
381 typedef prog_section_both prog_section_field;
382
383 typedef struct {
384     int32_t   entry;      /* in statement table for instructions  */
385     uint32_t  firstlocal; /* First local in local table           */
386     uint32_t  locals;     /* Total ints of params + locals        */
387     uint32_t  profile;    /* Always zero (engine uses this)       */
388     uint32_t  name;       /* name of function in string table     */
389     uint32_t  file;       /* file of the source file              */
390     uint32_t  nargs;      /* number of arguments                  */
391     uint8_t   argsize[8]; /* size of arguments (keep 8 always?)   */
392 } prog_section_function;
393
394 /*
395  * Instructions
396  * These are the external instructions supported by the interperter
397  * this is what things compile to (from the C code).
398  */
399 enum {
400     INSTR_DONE,
401     INSTR_MUL_F,
402     INSTR_MUL_V,
403     INSTR_MUL_VF,
404     INSTR_MUL_FV,
405     INSTR_DIV_F,
406     INSTR_ADD_F,
407     INSTR_ADD_V,
408     INSTR_SUB_F,
409     INSTR_SUB_V,
410     INSTR_EQ_F,
411     INSTR_EQ_V,
412     INSTR_EQ_S,
413     INSTR_EQ_E,
414     INSTR_EQ_FNC,
415     INSTR_NE_F,
416     INSTR_NE_V,
417     INSTR_NE_S,
418     INSTR_NE_E,
419     INSTR_NE_FNC,
420     INSTR_LE,
421     INSTR_GE,
422     INSTR_LT,
423     INSTR_GT,
424     INSTR_LOAD_F,
425     INSTR_LOAD_V,
426     INSTR_LOAD_S,
427     INSTR_LOAD_ENT,
428     INSTR_LOAD_FLD,
429     INSTR_LOAD_FNC,
430     INSTR_ADDRESS,
431     INSTR_STORE_F,
432     INSTR_STORE_V,
433     INSTR_STORE_S,
434     INSTR_STORE_ENT,
435     INSTR_STORE_FLD,
436     INSTR_STORE_FNC,
437     INSTR_STOREP_F,
438     INSTR_STOREP_V,
439     INSTR_STOREP_S,
440     INSTR_STOREP_ENT,
441     INSTR_STOREP_FLD,
442     INSTR_STOREP_FNC,
443     INSTR_RETURN,
444     INSTR_NOT_F,
445     INSTR_NOT_V,
446     INSTR_NOT_S,
447     INSTR_NOT_ENT,
448     INSTR_NOT_FNC,
449     INSTR_IF,
450     INSTR_IFNOT,
451     INSTR_CALL0,
452     INSTR_CALL1,
453     INSTR_CALL2,
454     INSTR_CALL3,
455     INSTR_CALL4,
456     INSTR_CALL5,
457     INSTR_CALL6,
458     INSTR_CALL7,
459     INSTR_CALL8,
460     INSTR_STATE,
461     INSTR_GOTO,
462     INSTR_AND,
463     INSTR_OR,
464     INSTR_BITAND,
465     INSTR_BITOR,
466
467 /* warning: will be reordered */
468     INSTR_MUL_Q,
469     INSTR_MUL_QF,
470     INSTR_MUL_M,
471     INSTR_MUL_MF,
472     INSTR_EQ_Q,
473     INSTR_EQ_M,
474     INSTR_NE_Q,
475     INSTR_NE_M,
476     INSTR_LOAD_Q,
477     INSTR_LOAD_M,
478     INSTR_STORE_Q,
479     INSTR_STORE_M,
480     INSTR_STOREP_Q,
481     INSTR_STOREP_M,
482     INSTR_INV_Q,
483     INSTR_INV_M,
484     /*
485      * Virtual instructions used by the assembler
486      * keep at the end but before virtual instructions
487      * for the IR below.
488      */
489     AINSTR_END,
490
491     /*
492      * Virtual instructions used by the IR
493      * Keep at the end!
494      */
495     VINSTR_PHI,
496     VINSTR_JUMP,
497     VINSTR_COND
498 };
499
500 /*
501  * The symbols below are created by the following
502  * expanded macros:
503  *
504  * VECTOR_MAKE(prog_section_statement, code_statements);
505  * VECTOR_MAKE(prog_section_def,       code_defs      );
506  * VECTOR_MAKE(prog_section_field,     code_fields    );
507  * VECTOR_MAKE(prog_section_function,  code_functions );
508  * VECTOR_MAKE(int,                    code_globals   );
509  * VECTOR_MAKE(char,                   code_chars     );
510  */
511 VECTOR_PROT(prog_section_statement, code_statements);
512 VECTOR_PROT(prog_section_statement, code_statements);
513 VECTOR_PROT(prog_section_def,       code_defs      );
514 VECTOR_PROT(prog_section_field,     code_fields    );
515 VECTOR_PROT(prog_section_function,  code_functions );
516 VECTOR_PROT(int,                    code_globals   );
517 VECTOR_PROT(char,                   code_chars     );
518
519 /*
520  * code_write -- writes out the compiled file
521  * code_init  -- prepares the code file
522  */
523 bool     code_write       (const char *filename);
524 void     code_init        ();
525 uint32_t code_genstring   (const char *string);
526 uint32_t code_cachedstring(const char *string);
527
528 /*===================================================================*/
529 /*========================= assembler.c =============================*/
530 /*===================================================================*/
531 static const struct {
532     const char  *m; /* menomic     */
533     const size_t o; /* operands    */
534     const size_t l; /* menomic len */
535 } asm_instr[] = {
536     { "DONE"      , 1, 4 },
537     { "MUL_F"     , 3, 5 },
538     { "MUL_V"     , 3, 5 },
539     { "MUL_VF"    , 3, 6 },
540     { "MUL_FV"    , 3, 6 },
541     { "DIV"       , 0, 3 },
542     { "ADD_F"     , 3, 5 },
543     { "ADD_V"     , 3, 5 },
544     { "SUB_F"     , 3, 5 },
545     { "DUB_V"     , 3, 5 },
546     { "EQ_F"      , 0, 4 },
547     { "EQ_V"      , 0, 4 },
548     { "EQ_S"      , 0, 4 },
549     { "EQ_E"      , 0, 4 },
550     { "EQ_FNC"    , 0, 6 },
551     { "NE_F"      , 0, 4 },
552     { "NE_V"      , 0, 4 },
553     { "NE_S"      , 0, 4 },
554     { "NE_E"      , 0, 4 },
555     { "NE_FNC"    , 0, 6 },
556     { "LE"        , 0, 2 },
557     { "GE"        , 0, 2 },
558     { "LT"        , 0, 2 },
559     { "GT"        , 0, 2 },
560     { "FIELD_F"   , 0, 7 },
561     { "FIELD_V"   , 0, 7 },
562     { "FIELD_S"   , 0, 7 },
563     { "FIELD_ENT" , 0, 9 },
564     { "FIELD_FLD" , 0, 9 },
565     { "FIELD_FNC" , 0, 9 },
566     { "ADDRESS"   , 0, 7 },
567     { "STORE_F"   , 0, 7 },
568     { "STORE_V"   , 0, 7 },
569     { "STORE_S"   , 0, 7 },
570     { "STORE_ENT" , 0, 9 },
571     { "STORE_FLD" , 0, 9 },
572     { "STORE_FNC" , 0, 9 },
573     { "STOREP_F"  , 0, 8 },
574     { "STOREP_V"  , 0, 8 },
575     { "STOREP_S"  , 0, 8 },
576     { "STOREP_ENT", 0, 10},
577     { "STOREP_FLD", 0, 10},
578     { "STOREP_FNC", 0, 10},
579     { "RETURN"    , 0, 6 },
580     { "NOT_F"     , 0, 5 },
581     { "NOT_V"     , 0, 5 },
582     { "NOT_S"     , 0, 5 },
583     { "NOT_ENT"   , 0, 7 },
584     { "NOT_FNC"   , 0, 7 },
585     { "IF"        , 0, 2 },
586     { "IFNOT"     , 0, 5 },
587     { "CALL0"     , 1, 5 },
588     { "CALL1"     , 2, 5 },
589     { "CALL2"     , 3, 5 },
590     { "CALL3"     , 4, 5 },
591     { "CALL4"     , 5, 5 },
592     { "CALL5"     , 6, 5 },
593     { "CALL6"     , 7, 5 },
594     { "CALL7"     , 8, 5 },
595     { "CALL8"     , 9, 5 },
596     { "STATE"     , 0, 5 },
597     { "GOTO"      , 0, 4 },
598     { "AND"       , 0, 3 },
599     { "OR"        , 0, 2 },
600     { "BITAND"    , 0, 6 },
601     { "BITOR"     , 0, 5 },
602
603     { "MUL_Q"     , 3, 5 },
604     { "MUL_QF"    , 3, 6 },
605     { "MUL_M"     , 3, 5 },
606     { "MUL_MF"    , 3, 6 },
607     { "EQ_Q"      , 0, 4 },
608     { "EQ_M"      , 0, 4 },
609     { "NE_Q"      , 0, 4 },
610     { "NE_M"      , 0, 4 },
611     { "FIELD_Q"   , 0, 7 },
612     { "FIELD_M"   , 0, 7 },
613     { "STORE_Q"   , 0, 7 },
614     { "STORE_M"   , 0, 7 },
615     { "STOREP_Q"  , 0, 8 },
616     { "STOREP_M"  , 0, 8 },
617     { "INV_Q"     , 0, 5 },
618     { "INV_M"     , 0, 5 },
619
620     { "END"       , 0, 3 } /* virtual assembler instruction */
621 };
622
623 void asm_init (const char *, FILE **);
624 void asm_close(FILE *);
625 void asm_parse(FILE *);
626 /*===================================================================*/
627 /*============================= ast.c ===============================*/
628 /*===================================================================*/
629 #define MEM_VECTOR_PROTO(Towner, Tmem, mem)                   \
630     bool GMQCC_WARN Towner##_##mem##_add(Towner*, Tmem);      \
631     bool GMQCC_WARN Towner##_##mem##_remove(Towner*, size_t)
632
633 #define MEM_VECTOR_PROTO_ALL(Towner, Tmem, mem)                    \
634     MEM_VECTOR_PROTO(Towner, Tmem, mem);                           \
635     bool GMQCC_WARN Towner##_##mem##_find(Towner*, Tmem, size_t*); \
636     void Towner##_##mem##_clear(Towner*)
637
638 #define MEM_VECTOR_MAKE(Twhat, name) \
639     Twhat  *name;                    \
640     size_t name##_count;             \
641     size_t name##_alloc
642
643 #define MEM_VEC_FUN_ADD(Tself, Twhat, mem)                           \
644 bool GMQCC_WARN Tself##_##mem##_add(Tself *self, Twhat f)            \
645 {                                                                    \
646     Twhat *reall;                                                    \
647     if (self->mem##_count == self->mem##_alloc) {                    \
648         if (!self->mem##_alloc) {                                    \
649             self->mem##_alloc = 16;                                  \
650         } else {                                                     \
651             self->mem##_alloc *= 2;                                  \
652         }                                                            \
653         reall = (Twhat*)mem_a(sizeof(Twhat) * self->mem##_alloc);    \
654         if (!reall) {                                                \
655             return false;                                            \
656         }                                                            \
657         memcpy(reall, self->mem, sizeof(Twhat) * self->mem##_count); \
658         mem_d(self->mem);                                            \
659         self->mem = reall;                                           \
660     }                                                                \
661     self->mem[self->mem##_count++] = f;                              \
662     return true;                                                     \
663 }
664
665 #define MEM_VEC_FUN_REMOVE(Tself, Twhat, mem)                        \
666 bool GMQCC_WARN Tself##_##mem##_remove(Tself *self, size_t idx)      \
667 {                                                                    \
668     size_t i;                                                        \
669     Twhat *reall;                                                    \
670     if (idx >= self->mem##_count) {                                  \
671         return true; /* huh... */                                    \
672     }                                                                \
673     for (i = idx; i < self->mem##_count-1; ++i) {                    \
674         self->mem[i] = self->mem[i+1];                               \
675     }                                                                \
676     self->mem##_count--;                                             \
677     if (self->mem##_count < self->mem##_count/2) {                   \
678         self->mem##_alloc /= 2;                                      \
679         reall = (Twhat*)mem_a(sizeof(Twhat) * self->mem##_count);    \
680         if (!reall) {                                                \
681             return false;                                            \
682         }                                                            \
683         memcpy(reall, self->mem, sizeof(Twhat) * self->mem##_count); \
684         mem_d(self->mem);                                            \
685         self->mem = reall;                                           \
686     }                                                                \
687     return true;                                                     \
688 }
689
690 #define MEM_VEC_FUN_FIND(Tself, Twhat, mem)                     \
691 bool GMQCC_WARN Tself##_##mem##_find(Tself *self, Twhat obj, size_t *idx) \
692 {                                                               \
693     size_t i;                                                   \
694     for (i = 0; i < self->mem##_count; ++i) {                   \
695         if (self->mem[i] == obj) {                              \
696             if (idx) {                                          \
697                 *idx = i;                                       \
698             }                                                   \
699             return true;                                        \
700         }                                                       \
701     }                                                           \
702     return false;                                               \
703 }
704
705 #define MEM_VEC_FUN_APPEND(Tself, Twhat, mem)                        \
706 bool GMQCC_WARN Tself##_##mem##_append(Tself *s, Twhat *p, size_t c) \
707 {                                                                    \
708     Twhat *reall;                                                    \
709     if (s->mem##_count+c >= s->mem##_alloc) {                        \
710         if (!s->mem##_alloc) {                                       \
711             s->mem##_alloc = c < 16 ? 16 : c;                        \
712         } else {                                                     \
713             s->mem##_alloc *= 2;                                     \
714             if (s->mem##_count+c >= s->mem##_alloc) {                \
715                 s->mem##_alloc = s->mem##_count+c;                   \
716             }                                                        \
717         }                                                            \
718         reall = (Twhat*)mem_a(sizeof(Twhat) * s->mem##_alloc);       \
719         if (!reall) {                                                \
720             return false;                                            \
721         }                                                            \
722         memcpy(reall, s->mem, sizeof(Twhat) * s->mem##_count);       \
723         mem_d(s->mem);                                               \
724         s->mem = reall;                                              \
725     }                                                                \
726     memcpy(&s->mem[s->mem##_count], p, c*sizeof(*p));                \
727     s->mem##_count += c;                                             \
728     return true;                                                     \
729 }
730
731 #define MEM_VEC_FUN_RESIZE(Tself, Twhat, mem)                    \
732 bool GMQCC_WARN Tself##_##mem##_resize(Tself *s, size_t c)       \
733 {                                                                \
734     Twhat *reall;                                                \
735     if (c > s->mem##_alloc) {                                    \
736         reall = (Twhat*)mem_a(sizeof(Twhat) * c);                \
737         if (!reall) { return false; }                            \
738         memcpy(reall, s->mem, sizeof(Twhat) * s->mem##_count);   \
739         s->mem##_alloc = c;                                      \
740         mem_d(s->mem);                                           \
741         s->mem = reall;                                          \
742         return true;                                             \
743     }                                                            \
744     s->mem##_count = c;                                          \
745     if (c < (s->mem##_alloc / 2)) {                              \
746         reall = (Twhat*)mem_a(sizeof(Twhat) * c);                \
747         if (!reall) { return false; }                            \
748         memcpy(reall, s->mem, sizeof(Twhat) * c);                \
749         mem_d(s->mem);                                           \
750         s->mem = reall;                                          \
751     }                                                            \
752     return true;                                                 \
753 }
754
755 #define MEM_VEC_FUN_CLEAR(Tself, mem)   \
756 void Tself##_##mem##_clear(Tself *self) \
757 {                                       \
758     if (!self->mem)                     \
759         return;                         \
760     mem_d((void*) self->mem);           \
761     self->mem = NULL;                   \
762     self->mem##_count = 0;              \
763     self->mem##_alloc = 0;              \
764 }
765
766 #define MEM_VECTOR_CLEAR(owner, mem)  \
767     if ((owner)->mem)                 \
768         mem_d((void*)((owner)->mem)); \
769     (owner)->mem = NULL;              \
770     (owner)->mem##_count = 0;         \
771     (owner)->mem##_alloc = 0
772
773 #define MEM_VECTOR_INIT(owner, mem) \
774 {                                   \
775     (owner)->mem = NULL;            \
776     (owner)->mem##_count = 0;       \
777     (owner)->mem##_alloc = 0;       \
778 }
779
780 #define MEM_VECTOR_MOVE(from, mem, to, tm)   \
781 {                                            \
782     (to)->tm = (from)->mem;                  \
783     (to)->tm##_count = (from)->mem##_count;  \
784     (to)->tm##_alloc = (from)->mem##_alloc;  \
785     (from)->mem = NULL;                      \
786     (from)->mem##_count = 0;                 \
787     (from)->mem##_alloc = 0;                 \
788 }
789
790 #define MEM_VEC_FUNCTIONS(Tself, Twhat, mem) \
791 MEM_VEC_FUN_REMOVE(Tself, Twhat, mem)        \
792 MEM_VEC_FUN_ADD(Tself, Twhat, mem)
793
794 #define MEM_VEC_FUNCTIONS_ALL(Tself, Twhat, mem) \
795 MEM_VEC_FUNCTIONS(Tself, Twhat, mem)             \
796 MEM_VEC_FUN_CLEAR(Tself, mem)                    \
797 MEM_VEC_FUN_FIND(Tself, Twhat, mem)
798
799 enum store_types {
800     store_global,
801     store_local,  /* local, assignable for now, should get promoted later */
802     store_param,  /* parameters, they are locals with a fixed position */
803     store_value,  /* unassignable */
804     store_return  /* unassignable, at OFS_RETURN */
805 };
806
807 typedef struct {
808     float x, y, z;
809 } vector;
810
811 typedef float matrix[4][4]; /* OpenGL layout */
812 typedef float quaternion[4]; /* order: x, y, z, w */
813 #define MATRIX(axis, elem) ((4*(axis)) + (elem))
814 #define QUAT_X 0
815 #define QUAT_Y 1
816 #define QUAT_Z 2
817 #define QUAT_W 3
818
819 /*
820  * A shallow copy of a lex_file to remember where which ast node
821  * came from.
822  */
823 typedef struct {
824     const char *file;
825     size_t      line;
826 } lex_ctx;
827
828 /*===================================================================*/
829 /*============================= exec.c ==============================*/
830 /*===================================================================*/
831
832 /* darkplaces has (or will have) a 64 bit prog loader
833  * where the 32 bit qc program is autoconverted on load.
834  * Since we may want to support that as well, let's redefine
835  * float and int here.
836  */
837 typedef float   qcfloat;
838 typedef int32_t qcint;
839
840 typedef union {
841     qcint   _int;
842     qcint    string;
843     qcint    function;
844     qcint    edict;
845     qcfloat _float;
846     qcfloat vector[3];
847     qcint   ivector[3];
848 } qcany;
849
850 typedef char qcfloat_size_is_correct [sizeof(qcfloat) == 4 ?1:-1];
851 typedef char qcint_size_is_correct   [sizeof(qcint)   == 4 ?1:-1];
852
853 enum {
854     VMERR_OK,
855     VMERR_TEMPSTRING_ALLOC,
856
857     VMERR_END
858 };
859
860 #define VM_JUMPS_DEFAULT 1000000
861
862 /* execute-flags */
863 #define VMXF_DEFAULT 0x0000     /* default flags - nothing */
864 #define VMXF_TRACE   0x0001     /* trace: print statements before executing */
865 #define VMXF_PROFILE 0x0002     /* profile: increment the profile counters */
866
867 struct qc_program_s;
868
869 typedef int (*prog_builtin)(struct qc_program_s *prog);
870
871 typedef struct {
872     qcint                  stmt;
873     size_t                 localsp;
874     prog_section_function *function;
875 } qc_exec_stack;
876
877 typedef struct qc_program_s {
878     char           *filename;
879
880     MEM_VECTOR_MAKE(prog_section_statement, code);
881     MEM_VECTOR_MAKE(prog_section_def,       defs);
882     MEM_VECTOR_MAKE(prog_section_def,       fields);
883     MEM_VECTOR_MAKE(prog_section_function,  functions);
884     MEM_VECTOR_MAKE(char,                   strings);
885     MEM_VECTOR_MAKE(qcint,                  globals);
886     MEM_VECTOR_MAKE(qcint,                  entitydata);
887
888     size_t tempstring_start;
889     size_t tempstring_at;
890
891     qcint  vmerror;
892
893     MEM_VECTOR_MAKE(size_t, profile);
894
895     MEM_VECTOR_MAKE(prog_builtin, builtins);
896
897     /* size_t ip; */
898     qcint  entities;
899     size_t entityfields;
900     bool   allowworldwrites;
901
902     MEM_VECTOR_MAKE(qcint,         localstack);
903     MEM_VECTOR_MAKE(qc_exec_stack, stack);
904     size_t statement;
905
906     int    argc; /* current arg count for debugging */
907 } qc_program;
908
909 qc_program* prog_load(const char *filename);
910 void        prog_delete(qc_program *prog);
911
912 bool prog_exec(qc_program *prog, prog_section_function *func, size_t flags, long maxjumps);
913
914 char*             prog_getstring (qc_program *prog, qcint str);
915 prog_section_def* prog_entfield  (qc_program *prog, qcint off);
916 prog_section_def* prog_getdef    (qc_program *prog, qcint off);
917 qcany*            prog_getedict  (qc_program *prog, qcint e);
918 qcint             prog_tempstring(qc_program *prog, const char *_str);
919
920 /*===================================================================*/
921 /*======================= main.c commandline ========================*/
922 /*===================================================================*/
923
924 #if 0
925 /* Helpers to allow for a whole lot of flags. Otherwise we'd limit
926  * to 32 or 64 -f options...
927  */
928 typedef struct {
929     size_t  idx; /* index into an array of 32 bit words */
930     uint8_t bit; /* index _into_ the 32 bit word, thus just uint8 */
931 } longbit;
932 #define LONGBIT(bit) { ((bit)/32), ((bit)%32) }
933 #else
934 typedef uint32_t longbit;
935 #define LONGBIT(bit) (bit)
936 #endif
937
938 /* Used to store the list of flags with names */
939 typedef struct {
940     const char *name;
941     longbit    bit;
942 } opts_flag_def;
943
944 /*===================================================================*/
945 /* list of -f flags, like -fdarkplaces-string-table-bug */
946 enum {
947 # define GMQCC_DEFINE_FLAG(X) X,
948 #  include "flags.def"
949 # undef GMQCC_DEFINE_FLAG
950     COUNT_FLAGS
951 };
952 static const opts_flag_def opts_flag_list[] = {
953 # define GMQCC_DEFINE_FLAG(X) { #X, LONGBIT(X) },
954 #  include "flags.def"
955 # undef GMQCC_DEFINE_FLAG
956     { NULL, LONGBIT(0) }
957 };
958
959 enum {
960 # define GMQCC_DEFINE_FLAG(X) X,
961 #  include "warns.def"
962 # undef GMQCC_DEFINE_FLAG
963     COUNT_WARNINGS
964 };
965 static const opts_flag_def opts_warn_list[] = {
966 # define GMQCC_DEFINE_FLAG(X) { #X, LONGBIT(X) },
967 #  include "warns.def"
968 # undef GMQCC_DEFINE_FLAG
969     { NULL, LONGBIT(0) }
970 };
971
972 /* other options: */
973 enum {
974     COMPILER_QCC,     /* circa  QuakeC */
975     COMPILER_FTEQCC,  /* fteqcc QuakeC */
976     COMPILER_QCCX,    /* qccx   QuakeC */
977     COMPILER_GMQCC    /* this   QuakeC */
978 };
979 extern uint32_t    opts_O;      /* -Ox */
980 extern const char *opts_output; /* -o file */
981 extern int         opts_standard;
982 extern bool        opts_debug;
983 extern bool        opts_memchk;
984
985 /*===================================================================*/
986 #define OPTS_FLAG(i) (!! (opts_flags[(i)/32] & (1<< ((i)%32))))
987 extern uint32_t opts_flags[1 + (COUNT_FLAGS / 32)];
988 #define OPTS_WARN(i) (!! (opts_warn[(i)/32] & (1<< ((i)%32))))
989 extern uint32_t opts_warn[1 + (COUNT_WARNINGS / 32)];
990
991 #endif