From e0c6872cf40896c7be36b11dcc744620f10adf1d Mon Sep 17 00:00:00 2001 From: Norbert Preining Date: Mon, 2 Sep 2019 13:46:59 +0900 Subject: Initial commit --- fonts/utilities/ps2pk/t1io.c | 287 +++++++++++++++++++++++++++++++++++++++++++ 1 file changed, 287 insertions(+) create mode 100644 fonts/utilities/ps2pk/t1io.c (limited to 'fonts/utilities/ps2pk/t1io.c') diff --git a/fonts/utilities/ps2pk/t1io.c b/fonts/utilities/ps2pk/t1io.c new file mode 100644 index 0000000000..384e3d19c3 --- /dev/null +++ b/fonts/utilities/ps2pk/t1io.c @@ -0,0 +1,287 @@ +/* $XConsortium: t1io.c,v 1.4 91/10/10 11:19:41 rws Exp $ */ +/* Copyright International Business Machines,Corp. 1991 + * All Rights Reserved + * + * License to use, copy, modify, and distribute this software + * and its documentation for any purpose and without fee is + * hereby granted, provided that the above copyright notice + * appear in all copies and that both that copyright notice and + * this permission notice appear in supporting documentation, + * and that the name of IBM not be used in advertising or + * publicity pertaining to distribution of the software without + * specific, written prior permission. + * + * IBM PROVIDES THIS SOFTWARE "AS IS", WITHOUT ANY WARRANTIES + * OF ANY KIND, EITHER EXPRESS OR IMPLIED, INCLUDING, BUT NOT + * LIMITED TO ANY IMPLIED WARRANTIES OF MERCHANTABILITY, + * FITNESS FOR A PARTICULAR PURPOSE, AND NONINFRINGEMENT OF + * THIRD PARTY RIGHTS. THE ENTIRE RISK AS TO THE QUALITY AND + * PERFORMANCE OF THE SOFTWARE, INCLUDING ANY DUTY TO SUPPORT + * OR MAINTAIN, BELONGS TO THE LICENSEE. SHOULD ANY PORTION OF + * THE SOFTWARE PROVE DEFECTIVE, THE LICENSEE (NOT IBM) ASSUMES + * THE ENTIRE COST OF ALL SERVICING, REPAIR AND CORRECTION. IN + * NO EVENT SHALL IBM BE LIABLE FOR ANY SPECIAL, INDIRECT OR + * CONSEQUENTIAL DAMAGES OR ANY DAMAGES WHATSOEVER RESULTING + * FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN ACTION OF + * CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT + * OF OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS + * SOFTWARE. + * + * Author: Carol H. Thompson IBM Almaden Research Center + */ +/******************************************************************* +* I/O package for Type 1 font reading +********************************************************************/ + +#ifndef STATIC +#define STATIC static +#endif + +#ifdef HAVE_CONFIG_H +#include "c-auto.h" +#endif + +#ifdef HAVE_FCNTL_H +#include +#endif + +#include "t1stdio.h" +#include "t1hdigit.h" + +/* Constants and variables used in the decryption */ +#define c1 ((unsigned short)52845) +#define c2 ((unsigned short)22719) +static unsigned short r; +static int asc, Decrypt; +static int extrach; +static int haveextrach; + +/* Our single FILE structure and buffer for this package */ +STATIC F_FILE TheFile; +STATIC unsigned char TheBuffer[F_BUFSIZ]; + +/* Our routines */ +STATIC int T1Decrypt(unsigned char *, int), T1Fill(F_FILE *); + +/* -------------------------------------------------------------- */ +/*ARGSUSED*/ +F_FILE *T1Open( + char *fn, /* Pointer to filename */ + char *mode) /* Pointer to open mode string */ +{ + F_FILE *of = &TheFile; + + Decrypt = 0; + + /* We know we are only reading */ +#if defined(MSDOS) || defined(VMS) || defined(WIN32) + if ((of->fd=open(fn, O_RDONLY | O_BINARY)) < 0) return NULL; +#else + if ((of->fd=open(fn, O_RDONLY)) < 0) return NULL; +#endif + + /* Initialize the buffer information of our file descriptor */ + of->b_base = TheBuffer; + of->b_size = F_BUFSIZ; + of->b_ptr = NULL; + of->b_cnt = 0; + of->flags = 0; + of->error = 0; + haveextrach = 0; + return &TheFile; +} /* end Open */ + +/* -------------------------------------------------------------- */ +int T1Getc( /* Read one character */ + F_FILE *f) /* Stream descriptor */ +{ + if (f->b_base == NULL) return EOF; /* already closed */ + + if (f->flags & UNGOTTENC) { /* there is an ungotten c */ + f->flags &= ~UNGOTTENC; + return (int) f->ungotc; + } + + if (f->b_cnt == 0) /* Buffer needs to be (re)filled */ + f->b_cnt = T1Fill(f); + if (f->b_cnt > 0) return (f->b_cnt--, (int) *(f->b_ptr++)); + else { + f->flags |= FIOEOF; + return EOF; + } +} /* end Getc */ + +/* -------------------------------------------------------------- */ +int T1Ungetc( /* Put back one character */ + int c, + F_FILE *f) /* Stream descriptor */ +{ + if (c != EOF) { + f->ungotc = c; + f->flags |= UNGOTTENC; /* set flag */ + f->flags &= ~FIOEOF; /* reset EOF */ + } + return c; +} /* end Ungetc */ + +/* -------------------------------------------------------------- */ +int T1Read( /* Read n items into caller's buffer */ + char *buffP, /* Buffer to be filled */ + int size, /* Size of each item */ + int n, /* Number of items to read */ + F_FILE *f) /* Stream descriptor */ +{ + int bytelen, cnt, i; + F_char *p = (F_char *)buffP; + int icnt; /* Number of characters to read */ + + if (f->b_base == NULL) return 0; /* closed */ + icnt = (size!=1)?n*size:n; /* Number of bytes we want */ + + if (f->flags & UNGOTTENC) { /* there is an ungotten c */ + f->flags &= ~UNGOTTENC; + *(p++) = f->ungotc; + icnt--; bytelen = 1; + } + else bytelen = 0; + + while (icnt > 0) { + /* First use any bytes we have buffered in the stream buffer */ + if ((cnt=f->b_cnt) > 0) { + if (cnt > icnt) cnt = icnt; + for (i=0; ib_ptr++); + f->b_cnt -= cnt; + icnt -= cnt; + bytelen += cnt; + } + + if ((icnt == 0) || (f->flags & FIOEOF)) break; + + f->b_cnt = T1Fill(f); + } + return ((size!=1)?bytelen/size:bytelen); +} /* end Read */ + +/* -------------------------------------------------------------- */ +int T1Close( /* Close the file */ + F_FILE *f) /* Stream descriptor */ +{ + if (f->b_base == NULL) return 0; /* already closed */ + f->b_base = NULL; /* no valid stream */ + return close(f->fd); +} /* end Close */ + +/* -------------------------------------------------------------- */ +F_FILE *T1eexec( /* Initialization */ + F_FILE *f) /* Stream descriptor */ +{ + int i, c; + int H; + unsigned char *p; + unsigned char randomP[8]; + + r = 55665; /* initial key */ + asc = 1; /* indicate ASCII form */ + + /* Consume the 4 random bytes, determining if we are also to + ASCIIDecodeHex as we process our input. (See pages 63-64 + of the Adobe Type 1 Font Format book.) */ + + /* Skip over any initial white space chars */ + while (HighHexP[c=getc(f)] == HWHITE_SPACE) ; + + /* If ASCII, the next 7 chars are guaranteed consecutive */ + randomP[0] = c; /* store first non white space char */ + fread((char *)randomP+1, 1, 3, f); /* read 3 more, for a total of 4 */ + /* store first four chars */ + for (i=0,p=randomP; i<4; i++) { /* Check 4 valid ASCIIEncode chars */ + if (HighHexP[*p++] > LAST_HDIGIT) { /* non-ASCII byte */ + asc = 0; + break; + } + } + if (asc) { /* ASCII form, convert first eight bytes to binary */ + fread((char *)randomP+4, 1, 4, f); /* Need four more */ + for (i=0,p=randomP; i<4; i++) { /* Convert */ + H = HighHexP[*p++]; + randomP[i] = H | LowHexP[*p++]; + } + } + + /* Adjust our key */ + for (i=0,p=randomP; i<4; i++) { + r = (*p++ + r) * c1 + c2; + } + + /* Decrypt the remaining buffered bytes */ + f->b_cnt = T1Decrypt(f->b_ptr, f->b_cnt); + Decrypt = 1; + return (feof(f))?NULL:f; +} /* end eexec */ + +/* -------------------------------------------------------------- */ +STATIC int T1Decrypt(unsigned char *p, int len) +{ + int n; + int H = 0, L; + unsigned char *inp = p; + unsigned char *tblP; + + if (asc) { + if (haveextrach) { + H = extrach; + tblP = LowHexP; + } + else tblP = HighHexP; + for (n=0; len>0; len--) { + L = tblP[*inp++]; + if (L == HWHITE_SPACE) continue; + if (L > LAST_HDIGIT) break; + if (tblP == HighHexP) { /* Got first hexit value */ + H = L; + tblP = LowHexP; + } else { /* Got second hexit value; compute value and store it */ + n++; + tblP = HighHexP; + H |= L; + /* H is an int, 0 <= H <= 255, so all of this will work */ + *p++ = H ^ (r >> 8); + r = (H + r) * c1 + c2; + } + } + if (tblP != HighHexP) { /* We had an odd number of hexits */ + extrach = H; + haveextrach = 1; + } else haveextrach = 0; + return n; + } else { + for (n = len; n>0; n--) { + H = *inp++; + *p++ = H ^ (r >> 8); + r = (H + r) * c1 + c2; + } + return len; + } +} /* end Decrypt */ + +/* -------------------------------------------------------------- */ +STATIC int T1Fill( /* Refill stream buffer */ + F_FILE *f) /* Stream descriptor */ +{ + int rc; + + rc = read(f->fd, f->b_base, F_BUFSIZ); + /* propagate any error or eof to current file */ + if (rc <= 0) { + if (rc == 0) /* means EOF */ + f->flags |= FIOEOF; + else { + f->error = (short)-rc; + f->flags |= FIOERROR; + rc = 0; + } + } + f->b_ptr = f->b_base; + if (Decrypt) rc = T1Decrypt(f->b_base, rc); + return rc; +} /* end Fill */ -- cgit v1.2.3