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Annotation of os2sdk/include/dos.h, revision 1.1

1.1     ! root        1: /***
        !             2: *dos.h - definitions for MS-DOS interface routines
        !             3: *
        !             4: *   Copyright (c) 1985-1987, Microsoft Corporation.  All rights reserved.
        !             5: *
        !             6: *Purpose:
        !             7: *   Defines the structs and unions used for the direct DOS interface
        !             8: *   routines; includes macros to access the segment and offset
        !             9: *   values of far pointers, so that they may be used by the routines; and
        !            10: *   provides function prototypes for direct DOS interface functions.
        !            11: *
        !            12: *******************************************************************************/
        !            13: 
        !            14: 
        !            15: #ifndef NO_EXT_KEYS /* extensions enabled */
        !            16:     #define _CDECL  cdecl
        !            17:     #define _NEAR   near
        !            18: #else /* extensions not enabled */
        !            19:     #define _CDECL
        !            20:     #define _NEAR
        !            21: #endif /* NO_EXT_KEYS */
        !            22: 
        !            23: 
        !            24: #ifndef _REGS_DEFINED
        !            25: 
        !            26: /* word registers */
        !            27: 
        !            28: struct WORDREGS {
        !            29:     unsigned int ax;
        !            30:     unsigned int bx;
        !            31:     unsigned int cx;
        !            32:     unsigned int dx;
        !            33:     unsigned int si;
        !            34:     unsigned int di;
        !            35:     unsigned int cflag;
        !            36:     };
        !            37: 
        !            38: 
        !            39: /* byte registers */
        !            40: 
        !            41: struct BYTEREGS {
        !            42:     unsigned char al, ah;
        !            43:     unsigned char bl, bh;
        !            44:     unsigned char cl, ch;
        !            45:     unsigned char dl, dh;
        !            46:     };
        !            47: 
        !            48: 
        !            49: /* general purpose registers union -
        !            50:  *  overlays the corresponding word and byte registers.
        !            51:  */
        !            52: 
        !            53: union REGS {
        !            54:     struct WORDREGS x;
        !            55:     struct BYTEREGS h;
        !            56:     };
        !            57: 
        !            58: 
        !            59: /* segment registers */
        !            60: 
        !            61: struct SREGS {
        !            62:     unsigned int es;
        !            63:     unsigned int cs;
        !            64:     unsigned int ss;
        !            65:     unsigned int ds;
        !            66:     };
        !            67: 
        !            68: #define _REGS_DEFINED
        !            69: 
        !            70: #endif
        !            71: 
        !            72: 
        !            73: /* dosexterror structure */
        !            74: 
        !            75: #ifndef _DOSERROR_DEFINED
        !            76: 
        !            77: struct DOSERROR {
        !            78:     int exterror;
        !            79:     char class;
        !            80:     char action;
        !            81:     char locus;
        !            82:     };
        !            83: 
        !            84: #define _DOSERROR_DEFINED
        !            85: 
        !            86: #endif
        !            87: 
        !            88: 
        !            89: /* _dos_findfirst structure */
        !            90: 
        !            91: #ifndef _FIND_T_DEFINED
        !            92: 
        !            93: struct find_t {
        !            94:     char reserved[21];
        !            95:     char attrib;
        !            96:     unsigned wr_time;
        !            97:     unsigned wr_date;
        !            98:     long size;
        !            99:     char name[13];
        !           100:     };
        !           101: 
        !           102: #define _FIND_T_DEFINED
        !           103: 
        !           104: #endif
        !           105: 
        !           106: 
        !           107: /* _dos_getdate/_dossetdate and _dos_gettime/_dos_settime structures */
        !           108: 
        !           109: #ifndef _DATETIME_T_DEFINED
        !           110: 
        !           111: struct dosdate_t {
        !           112:     unsigned char day;          /* 1-31 */
        !           113:     unsigned char month;        /* 1-12 */
        !           114:     unsigned int year;          /* 1980-2099 */
        !           115:     unsigned char dayofweek;    /* 0-6, 0=Sunday */
        !           116:     };
        !           117: 
        !           118: struct dostime_t {
        !           119:     unsigned char hour;     /* 0-23 */
        !           120:     unsigned char minute;   /* 0-59 */
        !           121:     unsigned char second;   /* 0-59 */
        !           122:     unsigned char hsecond;  /* 0-99 */
        !           123:     };
        !           124: 
        !           125: #define _DATETIME_T_DEFINED
        !           126: 
        !           127: #endif
        !           128: 
        !           129: 
        !           130: /* _dos_getdiskfree structure */
        !           131: 
        !           132: #ifndef _DISKFREE_T_DEFINED
        !           133: 
        !           134: struct diskfree_t {
        !           135:     unsigned total_clusters;
        !           136:     unsigned avail_clusters;
        !           137:     unsigned sectors_per_cluster;
        !           138:     unsigned bytes_per_sector;
        !           139:     };
        !           140: 
        !           141: #define _DISKFREE_T_DEFINED
        !           142: 
        !           143: #endif
        !           144: 
        !           145: 
        !           146: /* manifest constants for _hardresume result parameter */
        !           147: 
        !           148: #define _HARDERR_IGNORE     0   /* Ignore the error */
        !           149: #define _HARDERR_RETRY      1   /* Retry the operation */
        !           150: #define _HARDERR_ABORT      2   /* Abort program issuing Interrupt 23h */
        !           151: #define _HARDERR_FAIL       3   /* Fail the system call in progress */
        !           152:                                 /* _HARDERR_FAIL is not supported on DOS 2.x */
        !           153: 
        !           154: /* File attribute constants */
        !           155: 
        !           156: #define _A_NORMAL       0x00    /* Normal file - No read/write restrictions */
        !           157: #define _A_RDONLY       0x01    /* Read only file */
        !           158: #define _A_HIDDEN       0x02    /* Hidden file */
        !           159: #define _A_SYSTEM       0x04    /* System file */
        !           160: #define _A_VOLID        0x08    /* Volume ID file */
        !           161: #define _A_SUBDIR       0x10    /* Subdirectory */
        !           162: #define _A_ARCH         0x20    /* Archive file */
        !           163: 
        !           164: /* macros to break MS C "far" pointers into their segment and offset
        !           165:  * components
        !           166:  */
        !           167: 
        !           168: #define FP_SEG(fp) (*((unsigned *)&(fp) + 1))
        !           169: #define FP_OFF(fp) (*((unsigned *)&(fp)))
        !           170: 
        !           171: 
        !           172: /* external variable declarations */
        !           173: 
        !           174: extern unsigned int _NEAR _CDECL _osversion;
        !           175: 
        !           176: 
        !           177: /* function prototypes */
        !           178: 
        !           179: int _CDECL bdos(int, unsigned int, unsigned int);
        !           180: void _CDECL _disable(void);
        !           181: unsigned _CDECL _dos_allocmem(unsigned, unsigned *);
        !           182: unsigned _CDECL _dos_close(int);
        !           183: unsigned _CDECL _dos_creat(char *, unsigned, int *);
        !           184: unsigned _CDECL _dos_creatnew(char *, unsigned, int *);
        !           185: unsigned _CDECL _dos_findfirst(char *, unsigned, struct find_t *);
        !           186: unsigned _CDECL _dos_findnext(struct find_t *);
        !           187: unsigned _CDECL _dos_freemem(unsigned);
        !           188: void _CDECL _dos_getdate(struct dosdate_t *);
        !           189: void _CDECL _dos_getdrive(unsigned *);
        !           190: unsigned _CDECL _dos_getdiskfree(unsigned, struct diskfree_t *);
        !           191: unsigned _CDECL _dos_getfileattr(char *, unsigned *);
        !           192: unsigned _CDECL _dos_getftime(int, unsigned *, unsigned *);
        !           193: void _CDECL _dos_gettime(struct dostime_t *);
        !           194: void _CDECL _dos_keep(unsigned, unsigned);
        !           195: unsigned _CDECL _dos_open(char *, unsigned, int *);
        !           196: unsigned _CDECL _dos_setblock(unsigned, unsigned, unsigned *);
        !           197: unsigned _CDECL _dos_setdate(struct dosdate_t *);
        !           198: void _CDECL _dos_setdrive(unsigned, unsigned *);
        !           199: unsigned _CDECL _dos_setfileattr(char *, unsigned);
        !           200: unsigned _CDECL _dos_setftime(int, unsigned, unsigned);
        !           201: unsigned _CDECL _dos_settime(struct dostime_t *);
        !           202: int _CDECL dosexterr(struct DOSERROR *);
        !           203: void _CDECL _enable(void);
        !           204: void _CDECL _hardresume(int);
        !           205: void _CDECL _hardretn(int);
        !           206: int _CDECL intdos(union REGS *, union REGS *);
        !           207: int _CDECL intdosx(union REGS *, union REGS *, struct SREGS *);
        !           208: int _CDECL int86(int, union REGS *, union REGS *);
        !           209: int _CDECL int86x(int, union REGS *, union REGS *, struct SREGS *);
        !           210: void _CDECL segread(struct SREGS *);
        !           211: 
        !           212: 
        !           213: #ifndef NO_EXT_KEYS /* extensions enabled */
        !           214: void _CDECL _chain_intr(void (_CDECL interrupt far *)());
        !           215: void (_CDECL interrupt far * _CDECL _dos_getvect(unsigned))();
        !           216: unsigned _CDECL _dos_read(int, void far *, unsigned, unsigned *);
        !           217: void _CDECL _dos_setvect(unsigned, void (_CDECL interrupt far *)());
        !           218: unsigned _CDECL _dos_write(int, void far *, unsigned, unsigned *);
        !           219: void _CDECL _harderr(void (far *)());
        !           220: #endif /* NO_EXT_KEYS */
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