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#ifndef HELPERS_H
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#define HELPERS_H
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/* case-insensitive comparison of strings, returns non-zero on equality */
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int imatch(const char *s1, const char *s2);
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/* returns zero if s1 starts with s2 */
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int strstartswith(const char *s1, const char *s2);
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/* outputs a NULL-terminated string to stdout */
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void output_internal(const char *s, unsigned short nl);
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#define output(x) output_internal(x, 0)
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#define outputnl(x) output_internal(x, 1)
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mateuszvis |
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/*
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* FileInfoRec (DTA) format:
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* offset size desc
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* +0 21 reserved
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* +15h 1 file attr (1=RO 2=Hidden 4=System 8=VOL 16=DIR 32=Archive
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* +16h 2 time: bits 0-4=bi-seconds (0-30), bits 5-10=minutes (0-59), bits 11-15=hour (0-23)
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* +18h 2 date: bits 0-4=day(0-31), bits 5-8=month (1-12), bits 9-15=years since 1980
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* +1ah 4 DWORD file size, in bytes
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* +1eh 13 13-bytes max ASCIIZ filename
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*/
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_Packed struct DTA {
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char reserved[21];
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unsigned char attr;
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unsigned short time;
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unsigned short date;
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unsigned long size;
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char fname[13];
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};
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mateuszvis |
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#define DOS_ATTR_RO 1
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#define DOS_ATTR_HID 2
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#define DOS_ATTR_SYS 4
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#define DOS_ATTR_VOL 8
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#define DOS_ATTR_DIR 16
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#define DOS_ATTR_ARC 32
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/* find first matching files using a FindFirst DOS call
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* attr contains DOS attributes that files MUST have (ie attr=0 will match all
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* files)
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* returns 0 on success or a DOS err code on failure */
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unsigned short findfirst(struct DTA *dta, const char *pattern, unsigned short attr);
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/* find next matching, ie. continues an action intiated by findfirst() */
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unsigned short findnext(struct DTA *dta);
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mateuszvis |
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/* print s string and wait for a single key press from stdin. accepts only
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* key presses defined in the c ASCIIZ string. returns offset of pressed key
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* in string. keys in c MUST BE UPPERCASE! */
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unsigned short askchoice(const char *s, const char *c);
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/* converts a path to its canonic representation, returns 0 on success
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* or DOS err on failure (invalid drive) */
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unsigned short file_truename(const char *src, char *dst);
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mateuszvis |
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/* returns DOS attributes of file, or -1 on error */
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int file_getattr(const char *fname);
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mateuszvis |
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/* returns screen's width (in columns) */
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unsigned short screen_getwidth(void);
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/* returns screen's height (in rows) */
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unsigned short screen_getheight(void);
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/* displays the "Press any key to continue" msg and waits for a keypress */
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void press_any_key(void);
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mateuszvis |
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/* validate a drive (A=0, B=1, etc). returns 1 if valid, 0 otherwise */
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int isdrivevalid(unsigned char drv);
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/* converts a filename into FCB format (FILENAMEEXT) */
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void file_fname2fcb(char *dst, const char *src);
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/* converts a FCB filename (FILENAMEEXT) into normal format (FILENAME.EXT) */
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void file_fcb2fname(char *dst, const char *src);
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mateuszvis |
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#endif
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