symbol.h

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#ifndef C8_SYMBOL_H
#define C8_SYMBOL_H
 
#include <stdint.h>
 
#define C8_INSTRUCTION_COUNT 64
 
#define C8_LABEL_CEILING 64
 
#define C8_LABEL_IDENTIFIER_SIZE 20
 
#define C8_SYMBOL_CEILING 64
 
/* --- Instruction strings --- */
#define C8_S_CLS   "CLS"
#define C8_S_RET   "RET"
#define C8_S_JP    "JP"
#define C8_S_CALL  "CALL"
#define C8_S_SE    "SE"
#define C8_S_SNE   "SNE"
#define C8_S_LD    "LD"
#define C8_S_ADD   "ADD"
#define C8_S_OR    "OR"
#define C8_S_AND   "AND"
#define C8_S_SUB   "SUB"
#define C8_S_SHR   "SHR"
#define C8_S_SUBN  "SUBN"
#define C8_S_SHL   "SHL"
#define C8_S_RND   "RND"
#define C8_S_DRW   "DRW"
#define C8_S_SKP   "SKP"
#define C8_S_SKNP  "SKNP"
#define C8_S_XOR   "XOR"
#define C8_S_SCD   "SCD"
#define C8_S_SCR   "SCR"
#define C8_S_SCL   "SCL"
#define C8_S_EXIT  "EXIT"
#define C8_S_LOW   "LOW"
#define C8_S_HIGH  "HIGH"
#define C8_S_JP_V0 "JP V0,"
 
/* --- Reserved identifier strings --- */
#define C8_S_K  "K"
#define C8_S_F  "F"
#define C8_S_B  "B"
#define C8_S_DT "DT"
#define C8_S_ST "ST"
#define C8_S_I  "I"
#define C8_S_IP "[I]"
#define C8_S_DB ".DB"
#define C8_S_DW ".DW"
#define C8_S_DS ".DS"
#define C8_S_HF "HF"
#define C8_S_R  "R"
 
typedef enum {
    C8_I_NULL = -1,
    C8_I_CLS,
    C8_I_RET,
    C8_I_JP,
    C8_I_CALL,
    C8_I_SE,
    C8_I_SNE,
    C8_I_LD,
    C8_I_ADD,
    C8_I_OR,
    C8_I_AND,
    C8_I_SUB,
    C8_I_SHR,
    C8_I_SUBN,
    C8_I_SHL,
    C8_I_RND,
    C8_I_DRW,
    C8_I_SKP,
    C8_I_SKNP,
    C8_I_XOR,
    C8_I_SCD,
    C8_I_SCR,
    C8_I_SCL,
    C8_I_EXIT,
    C8_I_LOW,
    C8_I_HIGH,
    C8_I_JP_V0,
} C8_InstructionIdentifier;
 
typedef enum {
    C8_SYM_NULL,
    C8_SYM_DT,
    C8_SYM_ST,
    C8_SYM_I,
    C8_SYM_IP,
    C8_SYM_K,
    C8_SYM_F,
    C8_SYM_B,
    C8_SYM_DB,
    C8_SYM_DW,
    C8_SYM_DS,
    C8_SYM_HF,
    C8_SYM_R,
    C8_SYM_LABEL,
    C8_SYM_INT,
    C8_SYM_INT4,
    C8_SYM_INT8,
    C8_SYM_INT12,
    C8_SYM_STRING,
    C8_SYM_V,
    C8_SYM_INSTRUCTION,
    C8_SYM_LABEL_DEFINITION,
} C8_SymbolIdentifier;
 
typedef struct {
    C8_InstructionIdentifier cmd; 
    uint16_t                 base; 
    int                      pcount; 
    C8_SymbolIdentifier      ptype[3]; 
    uint16_t                 pmask[3]; 
} C8_InstructionFormat;
 
typedef struct {
    int                      line; 
    C8_InstructionIdentifier cmd; 
    int                      pcount; 
    C8_SymbolIdentifier      ptype[3]; 
    int                      p[3]; 
    C8_InstructionFormat*    format; 
} C8_Instruction;
 
typedef struct {
    char identifier[C8_LABEL_IDENTIFIER_SIZE]; 
    int  byte; 
} C8_Label;
 
typedef struct {
    C8_Label* l; 
    int       len; 
    int       ceil; 
} C8_LabelList;
 
typedef struct {
    C8_SymbolIdentifier type; 
    uint16_t            value; 
    int                 ln; 
} C8_Symbol;
 
typedef struct {
    C8_Symbol* s; 
    int        len; 
    int        ceil; 
} C8_SymbolList;
 
int                         c8_build_instruction(C8_Instruction*, C8_SymbolList*, int);
int                         c8_is_comment(const char*);
int                         c8_is_db(const char*);
int                         c8_is_ds(const char*);
int                         c8_is_dw(const char*);
int                         c8_is_instruction(const char*);
int                         c8_is_label_definition(const char*);
int                         c8_is_label(const char*, const C8_LabelList*);
int                         c8_is_register(const char*);
int                         c8_is_reserved_identifier(const char*);
C8_Symbol*                  c8_next_symbol(C8_SymbolList*);
int                         c8_populate_labels(C8_LabelList*);
int                         c8_resolve_labels(C8_SymbolList*, C8_LabelList*);
int                         c8_shift(uint16_t);
int                         c8_substitute_labels(C8_SymbolList*, C8_LabelList*);
 
extern const char*          c8_instructionStrings[];
extern const char*          c8_identifierStrings[];
extern C8_InstructionFormat c8_formats[];
 
#endif