home *** CD-ROM | disk | FTP | other *** search
- /* Copyright (C) 1992, 1993 Aladdin Enterprises. All rights reserved.
-
- This file is part of Ghostscript.
-
- Ghostscript is distributed in the hope that it will be useful, but
- WITHOUT ANY WARRANTY. No author or distributor accepts responsibility
- to anyone for the consequences of using it or for whether it serves any
- particular purpose or works at all, unless he says so in writing. Refer
- to the Ghostscript General Public License for full details.
-
- Everyone is granted permission to copy, modify and redistribute
- Ghostscript, but only under the conditions described in the Ghostscript
- General Public License. A copy of this license is supposed to have been
- given to you along with Ghostscript so you can know your rights and
- responsibilities. It should be in a file named COPYING. Among other
- things, the copyright notice and this notice must be preserved on all
- copies. */
-
- /* gp_msdos.c */
- /* Common platform-specific routines for MS-DOS (any compiler) */
- #include "stdio_.h"
- #include <fcntl.h>
- #include "dos_.h"
- #include "memory_.h"
- #include "string_.h"
- #include "gstypes.h"
- #include "gp.h"
- #include "gsutil.h"
-
- /* ------ Date and time ------ */
-
- /* Read the current date (in days since Jan. 1, 1980) */
- /* and time (in milliseconds since midnight). */
- void
- gp_get_clock(long *pdt)
- { union REGS osdate, ostime;
- long idate;
- static int mstart[12] =
- { 0, 31, 59, 90, 120, 151, 181, 212, 243, 273, 304, 334 };
- osdate.h.ah = 0x2a; /* get date */
- intdos(&osdate, &osdate);
- #define da_year rshort.cx
- #define da_mon h.dh
- #define da_day h.dl
- ostime.h.ah = 0x2c; /* get time */
- intdos(&ostime, &ostime);
- #define ti_hour h.ch
- #define ti_min h.cl
- #define ti_sec h.dh
- #define ti_hund h.dl
- idate = (long)osdate.da_year * 365 +
- (osdate.da_year / 4 + 1 + /* account for leap years */
- mstart[osdate.da_mon - 1] + /* month is 1-origin */
- osdate.da_day - 1); /* day of month is 1-origin */
- if ( osdate.da_mon <= 2 && osdate.da_year % 4 == 0 ) /* Jan. or Feb. of leap year */
- idate--;
- pdt[0] = idate;
- pdt[1] =
- (ostime.ti_hour * 60 + ostime.ti_min) * 60000L +
- (ostime.ti_sec * 100 + ostime.ti_hund) * 10L;
- }
-
- /* ------ Console management ------ */
-
- /* Answer whether a given file is the console (input or output). */
- /* This is not a standard gp procedure, */
- /* but the MS Windows configuration needs it, */
- /* and other MS-DOS configurations might need it someday. */
- int
- gp_file_is_console(FILE *f)
- { union REGS regs;
- if ( f == NULL )
- return 0;
- regs.h.ah = 0x44; /* ioctl */
- regs.h.al = 0; /* get device info */
- regs.rshort.bx = fileno(f);
- intdos(®s, ®s);
- return ((regs.h.dl & 0x80) != 0 && (regs.h.dl & 3) != 0);
- }
-
- /* ------ Printer accessing ------ */
-
- /* Put a printer file (which might be stdout) into binary or text mode. */
- /* This is not a standard gp procedure, */
- /* but all MS-DOS configurations need it. */
- void
- gp_set_printer_binary(int prnfno, int binary)
- { union REGS regs;
- regs.h.ah = 0x44; /* ioctl */
- regs.h.al = 0; /* get device info */
- regs.rshort.bx = prnfno;
- intdos(®s, ®s);
- if ( binary )
- regs.h.dl |= 0x20; /* binary (no ^Z intervention) */
- else
- regs.h.dl &= ~0x20; /* text */
- regs.h.dh = 0;
- regs.h.ah = 0x44; /* ioctl */
- regs.h.al = 1; /* set device info */
- intdos(®s, ®s);
- }
-
- /* ------ File names ------ */
-
- /* Define the character used for separating file names in a list. */
- const char gp_file_name_list_separator = ';';
-
- /* Define the default scratch file name prefix. */
- const char gp_scratch_file_name_prefix[] = "_temp_";
-
- /* Define the string to be concatenated with the file mode */
- /* for opening files without end-of-line conversion. */
- const char gp_fmode_binary_suffix[] = "b";
- /* Define the file modes for binary reading or writing. */
- const char gp_fmode_rb[] = "rb";
- const char gp_fmode_wb[] = "wb";
-
- /* Answer whether a file name contains a directory/device specification, */
- /* i.e. is absolute (not directory- or device-relative). */
- int
- gp_file_name_is_absolute(const char *fname, uint len)
- { /* A file name is absolute if it contains a drive specification */
- /* (second character is a :) or if it start with / or \. */
- return ( len >= 1 && (*fname == '/' || *fname == '\\' ||
- (len >= 2 && fname[1] == ':')) );
- }
-
- /* Answer the string to be used for combining a directory/device prefix */
- /* with a base file name. The file name is known to not be absolute. */
- const char *
- gp_file_name_concat_string(const char *prefix, uint plen,
- const char *fname, uint len)
- { if ( plen > 0 )
- switch ( prefix[plen - 1] )
- { case ':': case '/': case '\\': return "";
- };
- return "\\";
- }
-
- /* ------ File enumeration ------ */
-
- struct file_enum_s {
- ff_struct_t ffblk;
- char *pattern; /* orig pattern + modified pattern */
- int patlen; /* orig pattern length */
- int pat_size; /* allocate space for pattern */
- int head_size; /* pattern length through last */
- /* :, / or \ */
- int first_time;
- const gs_memory_procs *mprocs;
- };
-
- /* Initialize an enumeration. Note that * and ? in a directory */
- /* don't work, and \ is taken literally unless a second \ follows. */
- file_enum *
- gp_enumerate_files_init(const char *pat, uint patlen,
- const gs_memory_procs *mprocs)
- { file_enum *pfen = (file_enum *)(*mprocs->alloc)(1, sizeof(file_enum), "gp_enumerate_files");
- int pat_size = 2 * patlen + 1;
- char *pattern;
- char *p;
- int hsize = 0;
- int i;
- int dot = 0;
- if ( pfen == 0 )
- return 0;
- pattern = (*mprocs->alloc)(pat_size, 1,
- "gp_enumerate_files(pattern)");
- if ( pattern == 0 )
- return 0;
- memcpy(pattern, pat, patlen);
- p = pattern + patlen;
- for ( i = 0; i < patlen; i++ )
- { switch ( pat[i] )
- {
- case '*':
- /* Skip to . or end of string so DOS can do it. */
- *p++ = '*';
- while ( i < patlen && pat[i] != '.' ) i++;
- if ( i == patlen && !dot )
- { /* DOS doesn't interpret * alone as */
- /* matching all files; we need *.*. */
- *p++ = '.';
- *p++ = '*';
- }
- i--;
- continue;
- case '.':
- dot = 1;
- break;
- case '\\':
- if ( i + 1 < patlen && pat[i + 1] == '\\' )
- i++;
- /* falls through */
- case ':':
- case '/':
- hsize = p + 1 - (pattern + patlen);
- dot = 0;
- }
- *p++ = pat[i];
- }
- *p = 0;
- pfen->pattern = pattern;
- pfen->patlen = patlen;
- pfen->pat_size = pat_size;
- pfen->head_size = hsize;
- pfen->mprocs = mprocs;
- pfen->first_time = 1;
- return pfen;
- }
-
- /* Enumerate the next file. */
- private const string_match_params smp_file = { '*', '?', -1, 1 };
- uint
- gp_enumerate_files_next(file_enum *pfen, char *ptr, uint maxlen)
- { int code;
- char *p, *q;
- uint len;
- const char *fpat = pfen->pattern + pfen->patlen;
- top: if ( pfen->first_time )
- { code = dos_findfirst(fpat, &pfen->ffblk);
- pfen->first_time = 0;
- }
- else
- code = dos_findnext(&pfen->ffblk);
- if ( code != 0 )
- { /* All done, clean up. */
- gp_enumerate_files_close(pfen);
- return ~(uint)0;
- }
- if ( maxlen < 13 + pfen->head_size ) return maxlen + 1; /* cop out! */
- memcpy(ptr, fpat, pfen->head_size);
- for ( p = &pfen->ffblk.ff_name[0], q = ptr + pfen->head_size; *p; p++ )
- if ( *p != ' ' ) *q++ = *p;
- len = q - ptr;
- /* Make sure this file really matches the pattern. */
- if ( !string_match(ptr, len, pfen->pattern, pfen->patlen, &smp_file) )
- goto top;
- return len;
- }
-
- /* Clean up the file enumeration. */
- void
- gp_enumerate_files_close(file_enum *pfen)
- { const gs_memory_procs *mprocs = pfen->mprocs;
- (*mprocs->free)(pfen->pattern, pfen->pat_size, 1,
- "gp_enumerate_files_close(pattern)");
- (*mprocs->free)((char *)pfen, 1, sizeof(file_enum), "gp_enumerate_files_close");
- }
-