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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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