gmqcc/gmqcc.h

/*
 * Copyright (C) 2012 
 *     Dale Weiler
 *
 * Permission is hereby granted, free of charge, to any person obtaining a copy of
 * this software and associated documentation files (the "Software"), to deal in
 * the Software without restriction, including without limitation the rights to
 * use, copy, modify, merge, publish, distribute, sublicense, and/or sell copies
 * of the Software, and to permit persons to whom the Software is furnished to do
 * so, subject to the following conditions:
 *
 * The above copyright notice and this permission notice shall be included in all
 * copies or substantial portions of the Software.
 *
 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
 * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
 * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
 * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
 * SOFTWARE.
 */
#ifndef GMQCC_HDR
#define GMQCC_HDR
#include <limits.h>
#include <stdlib.h>
#include <string.h>
#include <stdio.h>
#include <ctype.h>
/*
 * stdint.h and inttypes.h -less subset
 * for systems that don't have it, which we must
 * assume is all systems. (int8_t not required)
 */
#if   CHAR_MIN  == -128
    typedef unsigned char  uint8_t; /* same as below */
#elif SCHAR_MIN == -128
    typedef unsigned char  uint8_t; /* same as above */
#endif
#if   SHRT_MAX  == 0x7FFF
    typedef short          int16_t;
    typedef unsigned short uint16_t;
#elif INT_MAX   == 0x7FFF
    typedef int            int16_t;
    typedef unsigned int   uint16_t;
#endif
#if   INT_MAX   == 0x7FFFFFFF 
    typedef int            int32_t;
    typedef unsigned int   uint32_t;
#elif LONG_MAX  == 0x7FFFFFFF
    typedef long           int32_t;
    typedef unsigned long  uint32_t;
#endif
#ifdef _LP64 /* long pointer == 64 */
    typedef unsigned long  uintptr_t;
    typedef long           intptr_t;
#else
    typedef unsigned int   uintptr_t;
    typedef int            intptr_t;
#endif 
/* Ensure type sizes are correct: */
typedef char uint8_size_is_correct  [sizeof(uint8_t)  == 1?1:-1];
typedef char uint16_size_if_correct [sizeof(uint16_t) == 2?1:-1];
typedef char uint32_size_is_correct [sizeof(uint32_t) == 4?1:-1];
typedef char int8_size_is_correct   [sizeof(int8_t)   == 1?1:-1];
typedef char int16_size_if_correct  [sizeof(int16_t)  == 2?1:-1];
typedef char int32_size_is_correct  [sizeof(int32_t)  == 4?1:-1];
/* intptr_t / uintptr_t correct size check */
typedef char uintptr_size_is_correct[sizeof(intptr_t) == sizeof(int*)?1:-1];
typedef char uintptr_size_is_correct[sizeof(uintptr_t)== sizeof(int*)?1:-1];

//===================================================================
//============================ lex.c ================================
//===================================================================
struct lex_file {
    FILE *file;        /* file handler */
    char *name;        /* name of file */
    char  peek  [5];  
    char  lastok[8192];
    
    int   last;    /* last token                   */
    int   current; /* current token                */
    int   length;  /* bytes left to parse          */
    int   size;    /* never changes (size of file) */
    int   line;    /* what line are we on?         */
};

/*
 * It's important that this table never exceed 32 keywords, the ascii
 * table starts at 33 (and we don't want conflicts)
 */
#define TOKEN_DO       0
#define TOKEN_ELSE     1
#define TOKEN_IF       2
#define TOKEN_WHILE    3
#define TOKEN_BREAK    4
#define TOKEN_CONTINUE 5
#define TOKEN_RETURN   6
#define TOKEN_GOTO     7
#define TOKEN_FOR      8   // extension
#define TOKEN_TYPEDEF  9   // extension

// ensure the token types are out of the
// bounds of anyothers that may conflict.
#define TOKEN_FLOAT    110
#define TOKEN_VECTOR   111
#define TOKEN_STRING   112
#define TOKEN_ENTITY   113
#define TOKEN_VOID     114

/*
 * Lexer state constants, these are numbers for where exactly in
 * the lexing the lexer is at. Or where it decided to stop if a lexer
 * error occurs.  These numbers must be > where the ascii-table ends
 * and > the last type token which is TOKEN_VOID
 */
#define LEX_COMMENT    1128 
#define LEX_CHRLIT     1129
#define LEX_STRLIT     1130
#define LEX_IDENT      1131

int              lex_token  (struct lex_file *);
void             lex_reset  (struct lex_file *);
void             lex_close  (struct lex_file *);
struct lex_file *lex_include(struct lex_file *, char *);
struct lex_file *lex_open   (FILE *);

//===================================================================
//========================== error.c ================================
//===================================================================
#define ERROR_LEX      (SHRT_MAX+0)
#define ERROR_PARSE    (SHRT_MAX+1)
#define ERROR_INTERNAL (SHRT_MAX+2)
#define ERROR_COMPILER (SHRT_MAX+3)
#define ERROR_PREPRO   (SHRT_MAX+4)
int error(struct lex_file *, int, const char *, ...);

//===================================================================
//========================== parse.c ================================
//===================================================================
int parse_gen(struct lex_file *);

//===================================================================
//========================== typedef.c ==============================
//===================================================================
typedef struct typedef_node_t {
    char      *name;
} typedef_node;

void          typedef_init();
void          typedef_clear();
typedef_node *typedef_find(const char *);
int           typedef_add (struct lex_file *file, const char *, const char *);


//===================================================================
//=========================== util.c ================================
//===================================================================
void *util_memory_a(unsigned int, unsigned int, const char *);
void  util_memory_d(void       *, unsigned int, const char *);
void  util_meminfo ();

char *util_strdup  (const char *);
char *util_strrq   (char *);
char *util_strrnl  (char *);
void  util_debug   (const char *, const char *, ...);
int   util_getline (char **, size_t *, FILE *);

#ifdef NOTRACK
#    define mem_a(x) malloc(x)
#    define mem_d(x) free  (x)
#else
#    define mem_a(x) util_memory_a((x), __LINE__, __FILE__)
#    define mem_d(x) util_memory_d((x), __LINE__, __FILE__)
#endif

#define VECTOR_MAKE(T,N)                                                 \
    T*     N##_data      = NULL;                                         \
    long   N##_elements  = 0;                                            \
    long   N##_allocated = 0;                                            \
    int    N##_add(T element) {                                          \
        if (N##_elements == N##_allocated) {                             \
            if (N##_allocated == 0) {                                    \
                N##_allocated = 12;                                      \
            } else {                                                     \
                N##_allocated *= 2;                                      \
            }                                                            \
            void *temp = mem_a(N##_allocated * sizeof(T));               \
            if  (!temp) {                                                \
                mem_d(temp);                                             \
                return -1;                                               \
            }                                                            \
            memcpy(temp, N##_data, (N##_elements * sizeof(T)));          \
            mem_d(N##_data);                                             \
            N##_data = (T*)temp;                                         \
        }                                                                \
        N##_data[N##_elements] = element;                                \
        return   N##_elements++;                                         \
    }

//===================================================================
//=========================== code.c ================================
//===================================================================
#define TYPE_VOID     0
#define TYPE_STRING   1
#define TYPE_FLOAT    2
#define TYPE_VECTOR   3
#define TYPE_ENTITY   4
#define TYPE_FIELD    5
#define TYPE_FUNCTION 6
#define TYPE_POINTER  7

/*
 * Each paramater incerements by 3 since vector types hold
 * 3 components (x,y,z).
 */
#define OFS_NULL      0
#define OFS_RETURN    1
#define OFS_PARM0     (OFS_RETURN+3)
#define OFS_PARM1     (OFS_PARM0 +3)
#define OFS_PARM2     (OFS_PARM1 +3)
#define OFS_PARM3     (OFS_PARM2 +3)
#define OFS_PARM4     (OFS_PARM3 +3)
#define OFS_PARM5     (OFS_PARM4 +3)
#define OFS_PARM6     (OFS_PARM5 +3)
#define OFS_PARM7     (OFS_PARM6 +3)

typedef struct {
    uint16_t opcode;
    
    /* operand 1 */
    union {
        int16_t  s1; /* signed   */
        uint16_t u1; /* unsigned */
    };
    /* operand 2 */
    union {
        int16_t  s2; /* signed   */
        uint16_t u2; /* unsigned */
    };
    /* operand 3 */
    union {
        int16_t  s3; /* signed   */
        uint16_t u3; /* unsigned */
    };
    
    /*
     * This is the same as the structure in darkplaces
     * {
     *     unsigned short op;
     *     short          a,b,c;
     * }
     * But this one is more sane to work with, and the
     * type sizes are guranteed.
     */
} prog_section_statement;

typedef struct {
    /* The types:
     * 0 = ev_void
     * 1 = ev_string
     * 2 = ev_float
     * 3 = ev_vector
     * 4 = ev_entity
     * 5 = ev_field
     * 6 = ev_function
     * 7 = ev_pointer -- engine only
     * 8 = ev_bad     -- engine only
     */
    uint16_t type;
    uint16_t offset;
    uint32_t name;
} prog_section_both;
typedef prog_section_both prog_section_def;
typedef prog_section_both prog_section_field;

typedef struct {
    int32_t   entry;      /* in statement table for instructions  */
    uint32_t  firstlocal; /* First local in local table           */
    uint32_t  locals;     /* Total ints of params + locals        */
    uint32_t  profile;    /* Always zero (engine uses this)       */
    uint32_t  name;       /* name of function in string table     */
    uint32_t  file;       /* file of the source file              */
    uint32_t  nargs;      /* number of arguments                  */
    uint8_t   argsize[8]; /* size of arguments (keep 8 always?)   */
} prog_section_function;

/* 
 * Instructions 
 * These are the external instructions supported by the interperter
 * this is what things compile to (from the C code).
 */
enum {
    INSTR_DONE,
    INSTR_MUL_F,
    INSTR_MUL_V,
    INSTR_MUL_FV,
    INSTR_MUL_VF,
    INSTR_DIV_F,
    INSTR_ADD_F,
    INSTR_ADD_V,
    INSTR_SUB_F,
    INSTR_SUB_V,
    INSTR_EQ_F,
    INSTR_EQ_V,
    INSTR_EQ_S,
    INSTR_EQ_E,
    INSTR_EQ_FNC,
    INSTR_NE_F,
    INSTR_NE_V,
    INSTR_NE_S,
    INSTR_NE_E,
    INSTR_NE_FNC,
    INSTR_LE,
    INSTR_GE,
    INSTR_LT,
    INSTR_GT,
    INSTR_LOAD_F,
    INSTR_LOAD_V,
    INSTR_LOAD_S,
    INSTR_LOAD_ENT,
    INSTR_LOAD_FLD,
    INSTR_LOAD_FNC,
    INSTR_ADDRESS,
    INSTR_STORE_F,
    INSTR_STORE_V,
    INSTR_STORE_S,
    INSTR_STORE_ENT,
    INSTR_STORE_FLD,
    INSTR_STORE_FNC,
    INSTR_STOREP_F,
    INSTR_STOREP_V,
    INSTR_STOREP_S,
    INSTR_STOREP_ENT,
    INSTR_STOREP_FLD,
    INSTR_STOREP_FNC,
    INSTR_RETURN,
    INSTR_NOT_F,
    INSTR_NOT_V,
    INSTR_NOT_S,
    INSTR_NOT_ENT,
    INSTR_NOT_FNC,
    INSTR_IF,
    INSTR_IFNOT,
    INSTR_CALL0,
    INSTR_CALL1,
    INSTR_CALL2,
    INSTR_CALL3,
    INSTR_CALL4,
    INSTR_CALL5,
    INSTR_CALL6,
    INSTR_CALL7,
    INSTR_CALL8,
    INSTR_STATE,
    INSTR_GOTO,
    INSTR_AND,
    INSTR_OR,
    INSTR_BITAND,
    INSTR_BITOR
};

/*
 * The symbols below are created by the following
 * expanded macros:
 * 
 * VECTOR_MAKE(prog_section_statement, code_statements);
 * VECTOR_MAKE(prog_section_def,       code_defs      );
 * VECTOR_MAKE(prog_section_field,     code_fields    );
 * VECTOR_MAKE(prog_section_function,  code_functions );
 * VECTOR_MAKE(int,                    code_globals   );
 * VECTOR_MAKE(char,                   code_strings   );
 */
int         code_statements_add(prog_section_statement);
int         code_defs_add     (prog_section_def);
int         code_fields_add   (prog_section_field);
int         code_functions_add(prog_section_function);
int         code_globals_add  (int);
int         code_strings_add  (char);
extern long code_statements_elements;
extern long code_strings_elements;
extern long code_globals_elements;
extern long code_functions_elements;
extern long code_fields_elements;
extern long code_defs_elements;

/*
 * code_write -- writes out the compiled file
 * code_init  -- prepares the code file
 */
void code_write ();
void code_init  ();

//===================================================================
//========================= assembler.c =============================
//===================================================================
void asm_init (const char *, FILE **);
void asm_close(FILE *);
void asm_parse(FILE *);
#endif