gmqcc.h

   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_##N,__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_VARIANT  ,
 283
 284     TYPE_COUNT
 285 };
 286
 287 extern const char *type_name[TYPE_COUNT];
 288
 289 extern size_t type_sizeof[TYPE_COUNT];
 290 extern uint16_t type_store_instr[TYPE_COUNT];
 291 /* could use type_store_instr + INSTR_STOREP_F - INSTR_STORE_F
 292  * but this breaks when TYPE_INTEGER is added, since with the enhanced
 293  * instruction set, the old ones are left untouched, thus the _I instructions
 294  * are at a seperate place.
 295  */
 296 extern uint16_t type_storep_instr[TYPE_COUNT];
 297
 298 typedef struct {
 299     uint32_t offset;      /* Offset in file of where data begins  */
 300     uint32_t length;      /* Length of section (how many of)      */
 301 } prog_section;
 302
 303 typedef struct {
 304     uint32_t     version;      /* Program version (6)     */
 305     uint16_t     crc16;        /* What is this?           */
 306     uint16_t     skip;         /* see propsal.txt         */
 307
 308     prog_section statements;   /* prog_section_statement  */
 309     prog_section defs;         /* prog_section_def        */
 310     prog_section fields;       /* prog_section_field      */
 311     prog_section functions;    /* prog_section_function   */
 312     prog_section strings;      /* What is this?           */
 313     prog_section globals;      /* What is this?           */
 314     uint32_t     entfield;     /* Number of entity fields */
 315 } prog_header;
 316
 317 /*
 318  * Each paramater incerements by 3 since vector types hold
 319  * 3 components (x,y,z).
 320  */
 321 #define OFS_NULL      0
 322 #define OFS_RETURN    1
 323 #define OFS_PARM0     (OFS_RETURN+3)
 324 #define OFS_PARM1     (OFS_PARM0 +3)
 325 #define OFS_PARM2     (OFS_PARM1 +3)
 326 #define OFS_PARM3     (OFS_PARM2 +3)
 327 #define OFS_PARM4     (OFS_PARM3 +3)
 328 #define OFS_PARM5     (OFS_PARM4 +3)
 329 #define OFS_PARM6     (OFS_PARM5 +3)
 330 #define OFS_PARM7     (OFS_PARM6 +3)
 331
 332 typedef struct {
 333     uint16_t opcode;
 334
 335     /* operand 1 */
 336     union {
 337         int16_t  s1; /* signed   */
 338         uint16_t u1; /* unsigned */
 339     } o1;
 340     /* operand 2 */
 341     union {
 342         int16_t  s1; /* signed   */
 343         uint16_t u1; /* unsigned */
 344     } o2;
 345     /* operand 3 */
 346     union {
 347         int16_t  s1; /* signed   */
 348         uint16_t u1; /* unsigned */
 349     } o3;
 350
 351     /*
 352      * This is the same as the structure in darkplaces
 353      * {
 354      *     unsigned short op;
 355      *     short          a,b,c;
 356      * }
 357      * But this one is more sane to work with, and the
 358      * type sizes are guranteed.
 359      */
 360 } prog_section_statement;
 361
 362 typedef struct {
 363     /* The types:
 364      * 0 = ev_void
 365      * 1 = ev_string
 366      * 2 = ev_float
 367      * 3 = ev_vector
 368      * 4 = ev_entity
 369      * 5 = ev_field
 370      * 6 = ev_function
 371      * 7 = ev_pointer -- engine only
 372      * 8 = ev_bad     -- engine only
 373      */
 374     uint16_t type;
 375     uint16_t offset;
 376     uint32_t name;
 377 } prog_section_both;
 378 typedef prog_section_both prog_section_def;
 379 typedef prog_section_both prog_section_field;
 380
 381 typedef struct {
 382     int32_t   entry;      /* in statement table for instructions  */
 383     uint32_t  firstlocal; /* First local in local table           */
 384     uint32_t  locals;     /* Total ints of params + locals        */
 385     uint32_t  profile;    /* Always zero (engine uses this)       */
 386     uint32_t  name;       /* name of function in string table     */
 387     uint32_t  file;       /* file of the source file              */
 388     uint32_t  nargs;      /* number of arguments                  */
 389     uint8_t   argsize[8]; /* size of arguments (keep 8 always?)   */
 390 } prog_section_function;
 391
 392 /*
 393  * Instructions
 394  * These are the external instructions supported by the interperter
 395  * this is what things compile to (from the C code).
 396  */
 397 enum {
 398     INSTR_DONE,
 399     INSTR_MUL_F,
 400     INSTR_MUL_V,
 401     INSTR_MUL_FV,
 402     INSTR_MUL_VF,
 403     INSTR_DIV_F,
 404     INSTR_ADD_F,
 405     INSTR_ADD_V,
 406     INSTR_SUB_F,
 407     INSTR_SUB_V,
 408     INSTR_EQ_F,
 409     INSTR_EQ_V,
 410     INSTR_EQ_S,
 411     INSTR_EQ_E,
 412     INSTR_EQ_FNC,
 413     INSTR_NE_F,
 414     INSTR_NE_V,
 415     INSTR_NE_S,
 416     INSTR_NE_E,
 417     INSTR_NE_FNC,
 418     INSTR_LE,
 419     INSTR_GE,
 420     INSTR_LT,
 421     INSTR_GT,
 422     INSTR_LOAD_F,
 423     INSTR_LOAD_V,
 424     INSTR_LOAD_S,
 425     INSTR_LOAD_ENT,
 426     INSTR_LOAD_FLD,
 427     INSTR_LOAD_FNC,
 428     INSTR_ADDRESS,
 429     INSTR_STORE_F,
 430     INSTR_STORE_V,
 431     INSTR_STORE_S,
 432     INSTR_STORE_ENT,
 433     INSTR_STORE_FLD,
 434     INSTR_STORE_FNC,
 435     INSTR_STOREP_F,
 436     INSTR_STOREP_V,
 437     INSTR_STOREP_S,
 438     INSTR_STOREP_ENT,
 439     INSTR_STOREP_FLD,
 440     INSTR_STOREP_FNC,
 441     INSTR_RETURN,
 442     INSTR_NOT_F,
 443     INSTR_NOT_V,
 444     INSTR_NOT_S,
 445     INSTR_NOT_ENT,
 446     INSTR_NOT_FNC,
 447     INSTR_IF,
 448     INSTR_IFNOT,
 449     INSTR_CALL0,
 450     INSTR_CALL1,
 451     INSTR_CALL2,
 452     INSTR_CALL3,
 453     INSTR_CALL4,
 454     INSTR_CALL5,
 455     INSTR_CALL6,
 456     INSTR_CALL7,
 457     INSTR_CALL8,
 458     INSTR_STATE,
 459     INSTR_GOTO,
 460     INSTR_AND,
 461     INSTR_OR,
 462     INSTR_BITAND,
 463     INSTR_BITOR,
 464
 465     /*
 466      * Virtual instructions used by the assembler
 467      * keep at the end but before virtual instructions
 468      * for the IR below.
 469      */
 470     AINSTR_END,
 471
 472     /*
 473      * Virtual instructions used by the IR
 474      * Keep at the end!
 475      */
 476     VINSTR_PHI,
 477     VINSTR_JUMP,
 478     VINSTR_COND
 479 };
 480
 481 /*
 482  * The symbols below are created by the following
 483  * expanded macros:
 484  *
 485  * VECTOR_MAKE(prog_section_statement, code_statements);
 486  * VECTOR_MAKE(prog_section_def,       code_defs      );
 487  * VECTOR_MAKE(prog_section_field,     code_fields    );
 488  * VECTOR_MAKE(prog_section_function,  code_functions );
 489  * VECTOR_MAKE(int,                    code_globals   );
 490  * VECTOR_MAKE(char,                   code_chars     );
 491  */
 492 VECTOR_PROT(prog_section_statement, code_statements);
 493 VECTOR_PROT(prog_section_statement, code_statements);
 494 VECTOR_PROT(prog_section_def,       code_defs      );
 495 VECTOR_PROT(prog_section_field,     code_fields    );
 496 VECTOR_PROT(prog_section_function,  code_functions );
 497 VECTOR_PROT(int,                    code_globals   );
 498 VECTOR_PROT(char,                   code_chars     );
 499
 500 typedef float   qcfloat;
 501 typedef int32_t qcint;
 502
 503 /*
 504  * code_write -- writes out the compiled file
 505  * code_init  -- prepares the code file
 506  */
 507 bool     code_write       (const char *filename);
 508 void     code_init        ();
 509 uint32_t code_genstring   (const char *string);
 510 uint32_t code_cachedstring(const char *string);
 511 qcint    code_alloc_field (size_t qcsize);
 512
 513 /*===================================================================*/
 514 /*========================= assembler.c =============================*/
 515 /*===================================================================*/
 516 static const struct {
 517     const char  *m; /* menomic     */
 518     const size_t o; /* operands    */
 519     const size_t l; /* menomic len */
 520 } asm_instr[] = {
 521     { "DONE"      , 1, 4 },
 522     { "MUL_F"     , 3, 5 },
 523     { "MUL_V"     , 3, 5 },
 524     { "MUL_FV"    , 3, 6 },
 525     { "MUL_VF"    , 3, 6 },
 526     { "DIV"       , 0, 3 },
 527     { "ADD_F"     , 3, 5 },
 528     { "ADD_V"     , 3, 5 },
 529     { "SUB_F"     , 3, 5 },
 530     { "DUB_V"     , 3, 5 },
 531     { "EQ_F"      , 0, 4 },
 532     { "EQ_V"      , 0, 4 },
 533     { "EQ_S"      , 0, 4 },
 534     { "EQ_E"      , 0, 4 },
 535     { "EQ_FNC"    , 0, 6 },
 536     { "NE_F"      , 0, 4 },
 537     { "NE_V"      , 0, 4 },
 538     { "NE_S"      , 0, 4 },
 539     { "NE_E"      , 0, 4 },
 540     { "NE_FNC"    , 0, 6 },
 541     { "LE"        , 0, 2 },
 542     { "GE"        , 0, 2 },
 543     { "LT"        , 0, 2 },
 544     { "GT"        , 0, 2 },
 545     { "FIELD_F"   , 0, 7 },
 546     { "FIELD_V"   , 0, 7 },
 547     { "FIELD_S"   , 0, 7 },
 548     { "FIELD_ENT" , 0, 9 },
 549     { "FIELD_FLD" , 0, 9 },
 550     { "FIELD_FNC" , 0, 9 },
 551     { "ADDRESS"   , 0, 7 },
 552     { "STORE_F"   , 0, 7 },
 553     { "STORE_V"   , 0, 7 },
 554     { "STORE_S"   , 0, 7 },
 555     { "STORE_ENT" , 0, 9 },
 556     { "STORE_FLD" , 0, 9 },
 557     { "STORE_FNC" , 0, 9 },
 558     { "STOREP_F"  , 0, 8 },
 559     { "STOREP_V"  , 0, 8 },
 560     { "STOREP_S"  , 0, 8 },
 561     { "STOREP_ENT", 0, 10},
 562     { "STOREP_FLD", 0, 10},
 563     { "STOREP_FNC", 0, 10},
 564     { "RETURN"    , 0, 6 },
 565     { "NOT_F"     , 0, 5 },
 566     { "NOT_V"     , 0, 5 },
 567     { "NOT_S"     , 0, 5 },
 568     { "NOT_ENT"   , 0, 7 },
 569     { "NOT_FNC"   , 0, 7 },
 570     { "IF"        , 0, 2 },
 571     { "IFNOT"     , 0, 5 },
 572     { "CALL0"     , 1, 5 },
 573     { "CALL1"     , 2, 5 },
 574     { "CALL2"     , 3, 5 },
 575     { "CALL3"     , 4, 5 },
 576     { "CALL4"     , 5, 5 },
 577     { "CALL5"     , 6, 5 },
 578     { "CALL6"     , 7, 5 },
 579     { "CALL7"     , 8, 5 },
 580     { "CALL8"     , 9, 5 },
 581     { "STATE"     , 0, 5 },
 582     { "GOTO"      , 0, 4 },
 583     { "AND"       , 0, 3 },
 584     { "OR"        , 0, 2 },
 585     { "BITAND"    , 0, 6 },
 586     { "BITOR"     , 0, 5 },
 587
 588     { "END"       , 0, 3 } /* virtual assembler instruction */
 589 };
 590
 591 void asm_init (const char *, FILE **);
 592 void asm_close(FILE *);
 593 void asm_parse(FILE *);
 594 /*===================================================================*/
 595 /*============================= ast.c ===============================*/
 596 /*===================================================================*/
 597 #define MEM_VECTOR_PROTO(Towner, Tmem, mem)                   \
 598     bool GMQCC_WARN Towner##_##mem##_add(Towner*, Tmem);      \
 599     bool GMQCC_WARN Towner##_##mem##_remove(Towner*, size_t)
 600
 601 #define MEM_VECTOR_PROTO_ALL(Towner, Tmem, mem)                    \
 602     MEM_VECTOR_PROTO(Towner, Tmem, mem);                           \
 603     bool GMQCC_WARN Towner##_##mem##_find(Towner*, Tmem, size_t*); \
 604     void Towner##_##mem##_clear(Towner*)
 605
 606 #define MEM_VECTOR_MAKE(Twhat, name) \
 607     Twhat  *name;                    \
 608     size_t name##_count;             \
 609     size_t name##_alloc
 610
 611 #define MEM_VEC_FUN_ADD(Tself, Twhat, mem)                           \
 612 bool GMQCC_WARN Tself##_##mem##_add(Tself *self, Twhat f)            \
 613 {                                                                    \
 614     Twhat *reall;                                                    \
 615     if (self->mem##_count == self->mem##_alloc) {                    \
 616         if (!self->mem##_alloc) {                                    \
 617             self->mem##_alloc = 16;                                  \
 618         } else {                                                     \
 619             self->mem##_alloc *= 2;                                  \
 620         }                                                            \
 621         reall = (Twhat*)mem_a(sizeof(Twhat) * self->mem##_alloc);    \
 622         if (!reall) {                                                \
 623             return false;                                            \
 624         }                                                            \
 625         memcpy(reall, self->mem, sizeof(Twhat) * self->mem##_count); \
 626         mem_d(self->mem);                                            \
 627         self->mem = reall;                                           \
 628     }                                                                \
 629     self->mem[self->mem##_count++] = f;                              \
 630     return true;                                                     \
 631 }
 632
 633 #define MEM_VEC_FUN_REMOVE(Tself, Twhat, mem)                        \
 634 bool GMQCC_WARN Tself##_##mem##_remove(Tself *self, size_t idx)      \
 635 {                                                                    \
 636     size_t i;                                                        \
 637     Twhat *reall;                                                    \
 638     if (idx >= self->mem##_count) {                                  \
 639         return true; /* huh... */                                    \
 640     }                                                                \
 641     for (i = idx; i < self->mem##_count-1; ++i) {                    \
 642         self->mem[i] = self->mem[i+1];                               \
 643     }                                                                \
 644     self->mem##_count--;                                             \
 645     if (self->mem##_count < self->mem##_count/2) {                   \
 646         self->mem##_alloc /= 2;                                      \
 647         reall = (Twhat*)mem_a(sizeof(Twhat) * self->mem##_count);    \
 648         if (!reall) {                                                \
 649             return false;                                            \
 650         }                                                            \
 651         memcpy(reall, self->mem, sizeof(Twhat) * self->mem##_count); \
 652         mem_d(self->mem);                                            \
 653         self->mem = reall;                                           \
 654     }                                                                \
 655     return true;                                                     \
 656 }
 657
 658 #define MEM_VEC_FUN_FIND(Tself, Twhat, mem)                     \
 659 bool GMQCC_WARN Tself##_##mem##_find(Tself *self, Twhat obj, size_t *idx) \
 660 {                                                               \
 661     size_t i;                                                   \
 662     for (i = 0; i < self->mem##_count; ++i) {                   \
 663         if (self->mem[i] == obj) {                              \
 664             if (idx) {                                          \
 665                 *idx = i;                                       \
 666             }                                                   \
 667             return true;                                        \
 668         }                                                       \
 669     }                                                           \
 670     return false;                                               \
 671 }
 672
 673 #define MEM_VEC_FUN_APPEND(Tself, Twhat, mem)                        \
 674 bool GMQCC_WARN Tself##_##mem##_append(Tself *s, Twhat *p, size_t c) \
 675 {                                                                    \
 676     Twhat *reall;                                                    \
 677     if (s->mem##_count+c >= s->mem##_alloc) {                        \
 678         if (!s->mem##_alloc) {                                       \
 679             s->mem##_alloc = c < 16 ? 16 : c;                        \
 680         } else {                                                     \
 681             s->mem##_alloc *= 2;                                     \
 682             if (s->mem##_count+c >= s->mem##_alloc) {                \
 683                 s->mem##_alloc = s->mem##_count+c;                   \
 684             }                                                        \
 685         }                                                            \
 686         reall = (Twhat*)mem_a(sizeof(Twhat) * s->mem##_alloc);       \
 687         if (!reall) {                                                \
 688             return false;                                            \
 689         }                                                            \
 690         memcpy(reall, s->mem, sizeof(Twhat) * s->mem##_count);       \
 691         mem_d(s->mem);                                               \
 692         s->mem = reall;                                              \
 693     }                                                                \
 694     memcpy(&s->mem[s->mem##_count], p, c*sizeof(*p));                \
 695     s->mem##_count += c;                                             \
 696     return true;                                                     \
 697 }
 698
 699 #define MEM_VEC_FUN_RESIZE(Tself, Twhat, mem)                    \
 700 bool GMQCC_WARN Tself##_##mem##_resize(Tself *s, size_t c)       \
 701 {                                                                \
 702     Twhat *reall;                                                \
 703     if (c > s->mem##_alloc) {                                    \
 704         reall = (Twhat*)mem_a(sizeof(Twhat) * c);                \
 705         if (!reall) { return false; }                            \
 706         memcpy(reall, s->mem, sizeof(Twhat) * s->mem##_count);   \
 707         s->mem##_alloc = c;                                      \
 708         mem_d(s->mem);                                           \
 709         s->mem = reall;                                          \
 710         return true;                                             \
 711     }                                                            \
 712     s->mem##_count = c;                                          \
 713     if (c < (s->mem##_alloc / 2)) {                              \
 714         reall = (Twhat*)mem_a(sizeof(Twhat) * c);                \
 715         if (!reall) { return false; }                            \
 716         memcpy(reall, s->mem, sizeof(Twhat) * c);                \
 717         mem_d(s->mem);                                           \
 718         s->mem = reall;                                          \
 719     }                                                            \
 720     return true;                                                 \
 721 }
 722
 723 #define MEM_VEC_FUN_CLEAR(Tself, mem)   \
 724 void Tself##_##mem##_clear(Tself *self) \
 725 {                                       \
 726     if (!self->mem)                     \
 727         return;                         \
 728     mem_d((void*) self->mem);           \
 729     self->mem = NULL;                   \
 730     self->mem##_count = 0;              \
 731     self->mem##_alloc = 0;              \
 732 }
 733
 734 #define MEM_VECTOR_CLEAR(owner, mem)  \
 735     if ((owner)->mem)                 \
 736         mem_d((void*)((owner)->mem)); \
 737     (owner)->mem = NULL;              \
 738     (owner)->mem##_count = 0;         \
 739     (owner)->mem##_alloc = 0
 740
 741 #define MEM_VECTOR_INIT(owner, mem) \
 742 {                                   \
 743     (owner)->mem = NULL;            \
 744     (owner)->mem##_count = 0;       \
 745     (owner)->mem##_alloc = 0;       \
 746 }
 747
 748 #define MEM_VECTOR_MOVE(from, mem, to, tm)   \
 749 {                                            \
 750     (to)->tm = (from)->mem;                  \
 751     (to)->tm##_count = (from)->mem##_count;  \
 752     (to)->tm##_alloc = (from)->mem##_alloc;  \
 753     (from)->mem = NULL;                      \
 754     (from)->mem##_count = 0;                 \
 755     (from)->mem##_alloc = 0;                 \
 756 }
 757
 758 #define MEM_VEC_FUNCTIONS(Tself, Twhat, mem) \
 759 MEM_VEC_FUN_REMOVE(Tself, Twhat, mem)        \
 760 MEM_VEC_FUN_ADD(Tself, Twhat, mem)
 761
 762 #define MEM_VEC_FUNCTIONS_ALL(Tself, Twhat, mem) \
 763 MEM_VEC_FUNCTIONS(Tself, Twhat, mem)             \
 764 MEM_VEC_FUN_CLEAR(Tself, mem)                    \
 765 MEM_VEC_FUN_FIND(Tself, Twhat, mem)
 766
 767 enum store_types {
 768     store_global,
 769     store_local,  /* local, assignable for now, should get promoted later */
 770     store_param,  /* parameters, they are locals with a fixed position */
 771     store_value,  /* unassignable */
 772     store_return  /* unassignable, at OFS_RETURN */
 773 };
 774
 775 typedef struct {
 776     float x, y, z;
 777 } vector;
 778
 779 /*
 780  * A shallow copy of a lex_file to remember where which ast node
 781  * came from.
 782  */
 783 typedef struct {
 784     const char *file;
 785     size_t      line;
 786 } lex_ctx;
 787
 788 /*===================================================================*/
 789 /*============================= exec.c ==============================*/
 790 /*===================================================================*/
 791
 792 /* darkplaces has (or will have) a 64 bit prog loader
 793  * where the 32 bit qc program is autoconverted on load.
 794  * Since we may want to support that as well, let's redefine
 795  * float and int here.
 796  */
 797 typedef union {
 798     qcint   _int;
 799     qcint    string;
 800     qcint    function;
 801     qcint    edict;
 802     qcfloat _float;
 803     qcfloat vector[3];
 804     qcint   ivector[3];
 805 } qcany;
 806
 807 typedef char qcfloat_size_is_correct [sizeof(qcfloat) == 4 ?1:-1];
 808 typedef char qcint_size_is_correct   [sizeof(qcint)   == 4 ?1:-1];
 809
 810 enum {
 811     VMERR_OK,
 812     VMERR_TEMPSTRING_ALLOC,
 813
 814     VMERR_END
 815 };
 816
 817 #define VM_JUMPS_DEFAULT 1000000
 818
 819 /* execute-flags */
 820 #define VMXF_DEFAULT 0x0000     /* default flags - nothing */
 821 #define VMXF_TRACE   0x0001     /* trace: print statements before executing */
 822 #define VMXF_PROFILE 0x0002     /* profile: increment the profile counters */
 823
 824 struct qc_program_s;
 825
 826 typedef int (*prog_builtin)(struct qc_program_s *prog);
 827
 828 typedef struct {
 829     qcint                  stmt;
 830     size_t                 localsp;
 831     prog_section_function *function;
 832 } qc_exec_stack;
 833
 834 typedef struct qc_program_s {
 835     char           *filename;
 836
 837     MEM_VECTOR_MAKE(prog_section_statement, code);
 838     MEM_VECTOR_MAKE(prog_section_def,       defs);
 839     MEM_VECTOR_MAKE(prog_section_def,       fields);
 840     MEM_VECTOR_MAKE(prog_section_function,  functions);
 841     MEM_VECTOR_MAKE(char,                   strings);
 842     MEM_VECTOR_MAKE(qcint,                  globals);
 843     MEM_VECTOR_MAKE(qcint,                  entitydata);
 844     MEM_VECTOR_MAKE(bool,                   entitypool);
 845
 846     size_t tempstring_start;
 847     size_t tempstring_at;
 848
 849     qcint  vmerror;
 850
 851     MEM_VECTOR_MAKE(size_t, profile);
 852
 853     MEM_VECTOR_MAKE(prog_builtin, builtins);
 854
 855     /* size_t ip; */
 856     qcint  entities;
 857     size_t entityfields;
 858     bool   allowworldwrites;
 859
 860     MEM_VECTOR_MAKE(qcint,         localstack);
 861     MEM_VECTOR_MAKE(qc_exec_stack, stack);
 862     size_t statement;
 863
 864     int    argc; /* current arg count for debugging */
 865 } qc_program;
 866
 867 qc_program* prog_load(const char *filename);
 868 void        prog_delete(qc_program *prog);
 869
 870 bool prog_exec(qc_program *prog, prog_section_function *func, size_t flags, long maxjumps);
 871
 872 char*             prog_getstring (qc_program *prog, qcint str);
 873 prog_section_def* prog_entfield  (qc_program *prog, qcint off);
 874 prog_section_def* prog_getdef    (qc_program *prog, qcint off);
 875 qcany*            prog_getedict  (qc_program *prog, qcint e);
 876 qcint             prog_tempstring(qc_program *prog, const char *_str);
 877
 878 /*===================================================================*/
 879 /*======================= main.c commandline ========================*/
 880 /*===================================================================*/
 881
 882 #if 0
 883 /* Helpers to allow for a whole lot of flags. Otherwise we'd limit
 884  * to 32 or 64 -f options...
 885  */
 886 typedef struct {
 887     size_t  idx; /* index into an array of 32 bit words */
 888     uint8_t bit; /* index _into_ the 32 bit word, thus just uint8 */
 889 } longbit;
 890 #define LONGBIT(bit) { ((bit)/32), ((bit)%32) }
 891 #else
 892 typedef uint32_t longbit;
 893 #define LONGBIT(bit) (bit)
 894 #endif
 895
 896 /* Used to store the list of flags with names */
 897 typedef struct {
 898     const char *name;
 899     longbit    bit;
 900 } opts_flag_def;
 901
 902 /*===================================================================*/
 903 /* list of -f flags, like -fdarkplaces-string-table-bug */
 904 enum {
 905 # define GMQCC_DEFINE_FLAG(X) X,
 906 #  include "flags.def"
 907 # undef GMQCC_DEFINE_FLAG
 908     COUNT_FLAGS
 909 };
 910 static const opts_flag_def opts_flag_list[] = {
 911 # define GMQCC_DEFINE_FLAG(X) { #X, LONGBIT(X) },
 912 #  include "flags.def"
 913 # undef GMQCC_DEFINE_FLAG
 914     { NULL, LONGBIT(0) }
 915 };
 916
 917 enum {
 918 # define GMQCC_DEFINE_FLAG(X) WARN_##X,
 919 #  include "warns.def"
 920 # undef GMQCC_DEFINE_FLAG
 921     COUNT_WARNINGS
 922 };
 923 static const opts_flag_def opts_warn_list[] = {
 924 # define GMQCC_DEFINE_FLAG(X) { #X, LONGBIT(WARN_##X) },
 925 #  include "warns.def"
 926 # undef GMQCC_DEFINE_FLAG
 927     { NULL, LONGBIT(0) }
 928 };
 929
 930 /* other options: */
 931 enum {
 932     COMPILER_QCC,     /* circa  QuakeC */
 933     COMPILER_FTEQCC,  /* fteqcc QuakeC */
 934     COMPILER_QCCX,    /* qccx   QuakeC */
 935     COMPILER_GMQCC    /* this   QuakeC */
 936 };
 937 extern uint32_t    opts_O;      /* -Ox */
 938 extern const char *opts_output; /* -o file */
 939 extern int         opts_standard;
 940 extern bool        opts_debug;
 941 extern bool        opts_memchk;
 942
 943 /*===================================================================*/
 944 #define OPTS_FLAG(i) (!! (opts_flags[(i)/32] & (1<< ((i)%32))))
 945 extern uint32_t opts_flags[1 + (COUNT_FLAGS / 32)];
 946 #define OPTS_WARN(i) (!! (opts_warn[(i)/32] & (1<< ((i)%32))))
 947 extern uint32_t opts_warn[1 + (COUNT_WARNINGS / 32)];
 948
 949 #endif