From 41a50e0be362adbf81c6dae915aa716f76e897a2 Mon Sep 17 00:00:00 2001 From: Jan Luebbe Date: Wed, 18 Feb 2009 13:17:48 +0100 Subject: [PATCH] Imported Upstream version 0.1 --- CHANGELOG | 8 + CREDITS | 6 + INSTALL | 3 + LICENSE | 340 +++++++++++++++++ Makefile | 22 ++ README | 13 + TODO | 9 + iec16022.1 | 63 ++++ iec16022.c | 454 +++++++++++++++++++++++ iec16022ecc200.c | 936 +++++++++++++++++++++++++++++++++++++++++++++++ iec16022ecc200.h | 44 +++ image.c | 726 ++++++++++++++++++++++++++++++++++++ image.h | 46 +++ reedsol.c | 187 ++++++++++ reedsol.h | 25 ++ 15 files changed, 2882 insertions(+) create mode 100644 CHANGELOG create mode 100644 CREDITS create mode 100644 INSTALL create mode 100644 LICENSE create mode 100644 Makefile create mode 100644 README create mode 100644 TODO create mode 100644 iec16022.1 create mode 100644 iec16022.c create mode 100644 iec16022ecc200.c create mode 100644 iec16022ecc200.h create mode 100644 image.c create mode 100644 image.h create mode 100644 reedsol.c create mode 100644 reedsol.h diff --git a/CHANGELOG b/CHANGELOG new file mode 100644 index 0000000..7f1e6b4 --- /dev/null +++ b/CHANGELOG @@ -0,0 +1,8 @@ +0.1 + - Initial release. + - INSTALL, README, TODO, CREDITS, Makefile, LICENSE and CHANGELOG files + added. + - Fix some include issues. + - Fix some signed/unsigned issues. + +2006-01-08 Stefan Schmidt diff --git a/CREDITS b/CREDITS new file mode 100644 index 0000000..c37d23d --- /dev/null +++ b/CREDITS @@ -0,0 +1,6 @@ +Adrian Kennard, Andrews & Arnold Ltd for the original source code. You can +find it at http://aa.gg/free/ + +Cliff Hones for the RS coding. + +Jan Luebbe for writing the manual page. diff --git a/INSTALL b/INSTALL new file mode 100644 index 0000000..69cadcb --- /dev/null +++ b/INSTALL @@ -0,0 +1,3 @@ +Installing iec16022 is really simple. Just do a 'make' and 'make install'. +In standard configuration the binary will be installed in /usr/local/bin. You +can change this behavior in the Makefile via DESTDIR. diff --git a/LICENSE b/LICENSE new file mode 100644 index 0000000..3912109 --- /dev/null +++ b/LICENSE @@ -0,0 +1,340 @@ + GNU GENERAL PUBLIC LICENSE + Version 2, June 1991 + + Copyright (C) 1989, 1991 Free Software Foundation, Inc. + 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA + Everyone is permitted to copy and distribute verbatim copies + of this license document, but changing it is not allowed. + + Preamble + + The licenses for most software are designed to take away your +freedom to share and change it. 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See the + GNU General Public License for more details. + + You should have received a copy of the GNU General Public License + along with this program; if not, write to the Free Software + Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA + + +Also add information on how to contact you by electronic and paper mail. + +If the program is interactive, make it output a short notice like this +when it starts in an interactive mode: + + Gnomovision version 69, Copyright (C) year name of author + Gnomovision comes with ABSOLUTELY NO WARRANTY; for details type `show w'. + This is free software, and you are welcome to redistribute it + under certain conditions; type `show c' for details. + +The hypothetical commands `show w' and `show c' should show the appropriate +parts of the General Public License. Of course, the commands you use may +be called something other than `show w' and `show c'; they could even be +mouse-clicks or menu items--whatever suits your program. + +You should also get your employer (if you work as a programmer) or your +school, if any, to sign a "copyright disclaimer" for the program, if +necessary. Here is a sample; alter the names: + + Yoyodyne, Inc., hereby disclaims all copyright interest in the program + `Gnomovision' (which makes passes at compilers) written by James Hacker. + + , 1 April 1989 + Ty Coon, President of Vice + +This General Public License does not permit incorporating your program into +proprietary programs. If your program is a subroutine library, you may +consider it more useful to permit linking proprietary applications with the +library. If this is what you want to do, use the GNU Library General +Public License instead of this License. diff --git a/Makefile b/Makefile new file mode 100644 index 0000000..c8fb665 --- /dev/null +++ b/Makefile @@ -0,0 +1,22 @@ +CC=/usr/bin/cc +INSTALL=/usr/bin/install +GZIP=/bin/gzip + +DESTDIR=/usr/local + +prefix=$(DESTDIR) +bindir=$(prefix)/bin +mandir=$(prefix)/share/man + +all: + $(CC) -o iec16022 iec16022.c -DLIB image.c reedsol.c iec16022ecc200.c -lz -lpopt + $(GZIP) -f --best < iec16022.1 > iec16022.1.gz + +install: all + $(INSTALL) -m 755 iec16022 $(bindir) + $(INSTALL) -m 644 iec16022.1.gz $(mandir)/man1 + + +clean: + rm -f iec16022 + rm -f iec16022.1.gz diff --git a/README b/README new file mode 100644 index 0000000..cf4aef8 --- /dev/null +++ b/README @@ -0,0 +1,13 @@ +With iec16022 you can produce 2d barcodes. Also known as Data Matrix. These +barcodes are defined in ISO IEC16022. + +The code was originally written by Andrews & Arnold Ltd. You can download this +code from http://aa.gg/free/. +The current maintainer of the code is Stefan Schmidt. + +Website: http://www.datenfreihafen.org/projects/iec16022.html +Maillinglist: https://sirius.lasnet.de/mailman/listinfo/iec16022 +SVN repository: https://svn.datenfreihafen.org/iec16022/ + + +Stefan Schmidt diff --git a/TODO b/TODO new file mode 100644 index 0000000..41c0ea9 --- /dev/null +++ b/TODO @@ -0,0 +1,9 @@ +- Set textwidth to 80. +- Fix compiler warnings. + +- Get ISO standard to verify code. + +Some things to think about: +--------------------------- +- Use libpng? +- Merge iec16022 in barcode? diff --git a/iec16022.1 b/iec16022.1 new file mode 100644 index 0000000..e725482 --- /dev/null +++ b/iec16022.1 @@ -0,0 +1,63 @@ +.\" Hey, EMACS: -*- nroff -*- +.\" First parameter, NAME, should be all caps +.\" Second parameter, SECTION, should be 1-8, maybe w/ subsection +.\" other parameters are allowed: see man(7), man(1) +.TH IEC16022 1 "December 28, 2005" +.\" Please adjust this date whenever revising the manpage. +.\" +.\" Some roff macros, for reference: +.\" .nh disable hyphenation +.\" .hy enable hyphenation +.\" .ad l left justify +.\" .ad b justify to both left and right margins +.\" .nf disable filling +.\" .fi enable filling +.\" .br insert line break +.\" .sp insert n+1 empty lines +.\" for manpage-specific macros, see man(7) +.SH NAME +iec16022 \- program to generate 2d barcodes +.SH SYNOPSIS +.B iec16022 +.RI [ options ] +.SH DESCRIPTION +This manual page documents briefly the +.B iec16022 +command. +.PP +.B iec16022 +generates 2d barcodes conforming to the ISO/IEC 16022 standard (which is +also known as Data Matrix and Semacode). +.SH OPTIONS +These programs follow the usual GNU command line syntax, with long +options starting with two dashes (`-'). +A summary of options is included below. +.TP +.B \-s, \-\-size WxH +Sets the size of the generated barcode. +.TP +.B \-c, \-\-barcode text +Specifies the text to be encoded. +.TP +.B \-\-ecc 000|050|080|100|140|200 +Sets the type of ecc to be used. +.TP +.B \-i, \-\-infile filename +Read input data from file. +.TP +.B \-o, \-\-outfile filenmae +Save output to file (instead of standard output). +.TP +.B \-f, \-\-format Text|EPS|Bin|Hex|Stamp|PNG +Set the output type. +.TP +.B \-?, \-\-help +Show summary of options. +.TP +.B \-\-usage +Show short overview of options. +.SH AUTHOR +iec16022 was written by Adrian Kennard, Andrews & Arnold Ltd. +.PP +This manual page was written by Jan Luebbe , +for the Debian project (but may be used by others). diff --git a/iec16022.c b/iec16022.c new file mode 100644 index 0000000..3c73935 --- /dev/null +++ b/iec16022.c @@ -0,0 +1,454 @@ +/** + * + * IEC16022 bar code generation + * Adrian Kennard, Andrews & Arnold Ltd + * with help from Cliff Hones on the RS coding + * + * (c) 2004 Adrian Kennard, Andrews & Arnold Ltd + * (c) 2006 Stefan Schmidt + * + * This program is free software; you can redistribute it and/or modify + * it under the terms of the GNU General Public License as published by + * the Free Software Foundation; either version 2 of the License, or + * (at your option) any later version. + * + * This program is distributed in the hope that it will be useful, + * but WITHOUT ANY WARRANTY; without even the implied warranty of + * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the + * GNU General Public License for more details. + * + * You should have received a copy of the GNU General Public License + * along with this program; if not, write to the Free Software + * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA + * + */ + + +#include +#include +#include +#include +#include +#include +#include +#include "image.h" +#include "iec16022ecc200.h" + + // simple checked response malloc +void * +safemalloc (int n) +{ + void *p = malloc (n); + if (!p) + { + fprintf (stderr, "Malloc(%d) failed\n", n); + exit (1); + } + return p; +} + +// hex dump - bottom left pixel first +void +dumphex (unsigned char *grid, int W, int H, unsigned char p) +{ + int c = 0, + y; + for (y = 0; y < H; y++) + { + int v = 0, + x, + b = 128; + for (x = 0; x < W; x++) + { + if (grid[y * W + x]) + v |= b; + b >>= 1; + if (!b) + { + printf ("%02X", v ^ p); + v = 0; + b = 128; + c++; + } + } + if (b != 128) + { + printf ("%02X", v ^ p); + c++; + } + printf (" "); + c++; + if (c >= 80) + { + printf ("\n"); + c = 0; + } + } + if (c) + printf ("\n"); +} + +int +main (int argc, const char *argv[]) +{ + char c; + int W = 0, + H = 0; + int ecc = 0; + int barcodelen = 0; + char *encoding = 0; + char *outfile = 0; + char *infile = 0; + char *barcode = 0; + char *format = "Text"; + char *size = 0; + char *eccstr = 0; + int len = 0, + maxlen = 0, + ecclen = 0; + unsigned char *grid = 0; + poptContext optCon; // context for parsing command-line options + const struct poptOption optionsTable[] = { + { + "size", 's', POPT_ARG_STRING, &size, 0, "Size", "WxH"}, + { + "barcode", 'c', POPT_ARG_STRING, &barcode, 0, "Barcode", "text"}, + { + "ecc", 0, POPT_ARG_STRING, &eccstr, 0, "ECC", "000/050/080/100/140/200"}, + { + "infile", 'i', POPT_ARG_STRING, &infile, 0, "Barcode file", "filename"}, + { + "outfile", 'o', POPT_ARG_STRING, &outfile, 0, "Output filename", "filename"}, + { + "encoding", 'e', POPT_ARG_STRING, &encoding, 0, "Encoding template", "[CTXEAB]* for ecc200 or 11/27/41/37/128/256"}, + { + "format", 'f', POPT_ARGFLAG_SHOW_DEFAULT | POPT_ARG_STRING, &format, 0, "Output format", "Text/EPS/PNG/Bin/Hex/Stamp"}, + POPT_AUTOHELP { + NULL, 0, 0, NULL, 0} + }; + optCon = poptGetContext (NULL, argc, argv, optionsTable, 0); + poptSetOtherOptionHelp (optCon, "[barcode]"); + if ((c = poptGetNextOpt (optCon)) < -1) + { + /* an error occurred during option processing */ + fprintf (stderr, "%s: %s\n", poptBadOption (optCon, POPT_BADOPTION_NOALIAS), poptStrerror (c)); + return 1; + } + + if (poptPeekArg (optCon) && !barcode && !infile) + barcode = (char *) poptGetArg (optCon); + if (poptPeekArg (optCon) || !barcode && !infile || barcode && infile) + { + poptPrintUsage (optCon, stderr, 0); + return -1; + } + if (outfile && !freopen (outfile, "w", stdout)) + { + perror (outfile); + return 1; + } + + if (infile) + { // read from file + FILE *f = fopen (infile, "rb"); + barcode = safemalloc (4001); + if (!f) + { + perror (infile); + return 1; + } + barcodelen = fread (barcode, 1, 4000, f); + if (barcodelen < 0) + { + perror (infile); + return 1; + } + barcode[barcodelen] = 0; // null terminate anyway + close (f); + } else + barcodelen = strlen (barcode); + // check parameters + if (size) + { + char *x = strchr (size, 'x'); + W = atoi (size); + if (x) + H = atoi (x + 1); + if (!H) + W = H; + } + if (eccstr) + ecc = atoi (eccstr); + if (W & 1) + { // odd size + if (W != H || W < 9 || W > 49) + { + fprintf (stderr, "Invalid size %dx%d\n", W, H); + return 1; + } + if (!eccstr) + { + if (W >= 17) + ecc = 140; + else if (W >= 13) + ecc = 100; + else if (W >= 11) + ecc = 80; + else + ecc = 0; + } + if (ecc && ecc != 50 && ecc != 80 && ecc != 100 && ecc != 140 || ecc == 50 && W < 11 || ecc == 80 && W < 13 + || ecc == 100 && W < 13 || ecc == 140 && W < 17) + { + fprintf (stderr, "ECC%03d invalid for %dx%d\n", ecc, W, H); + return 1; + } + + } else if (W) + { // even size + if (W < H) + { + int t = W; + W = H; + H = t; + } + if (!eccstr) + ecc = 200; + if (ecc != 200) + { + fprintf (stderr, "ECC%03d invalid for %dx%d\n", ecc, W, H); + return 1; + } + } + + else + { // auto size + if (!eccstr) + ecc = 200; // default is even sizes only unless explicit ecc set to force odd sizes + } + + if (tolower (*format) == 's') + { // special stamp format checks & defaults + if (!W) + W = H = 32; + if (ecc != 200 || W != 32 || H != 32) + fprintf (stderr, "Stamps must be 32x32\n"); + if (encoding) + fprintf (stderr, "Stamps should use auto encoding\n"); + else + { + int n; + for (n = 0; n < barcodelen && (barcode[n] == ' ' || isdigit (barcode[n]) || isupper (barcode[n])); n++); + if (n < barcodelen) + fprintf (stderr, "Has invalid characters for a stamp\n"); + else + { // Generate simplistic encoding rules as used by the windows app + // TBA - does not always match the windows app... + n = 0; + encoding = safemalloc (barcodelen + 1); + while (n < barcodelen) + { + // ASCII + while (1) + { + if (n == barcodelen || n + 3 <= barcodelen && (!isdigit (barcode[n]) || !isdigit (barcode[n + 1]))) + break; + encoding[n++] = 'A'; + if (n < barcodelen && isdigit (barcode[n - 1]) && isdigit (barcode[n])) + encoding[n++] = 'A'; + } + // C40 + while (1) + { + int r = 0; + while (n + r < barcodelen && isdigit (barcode[n + r])) + r++; + if (n + 3 > barcodelen || r >= 6) + break; + encoding[n++] = 'C'; + encoding[n++] = 'C'; + encoding[n++] = 'C'; + } + } + encoding[n] = 0; + //fprintf (stderr, "%s\n%s\n", barcode, encoding); + } + } + } + // processing stamps + if ((W & 1) || ecc < 200) + { // odd sizes + fprintf (stderr, "Not done odd sizes yet, sorry\n"); + } else + { // even sizes + grid = iec16022ecc200 (&W, &H, &encoding, barcodelen, barcode, &len, &maxlen, &ecclen); + } + + // output + if (!grid || !W) + { + fprintf (stderr, "No barcode produced\n"); + return 1; + } + switch (tolower (*format)) + { + case 'i': // info + printf ("Size : %dx%d\n", W, H); + printf ("Encoded : %d of %d bytes with %d bytes of ecc\n", len, maxlen, ecclen); + printf ("Barcode : %s\n", barcode); + printf ("Encoding: %s\n", encoding); + break; + case 'h': // hex + dumphex (grid, W, H, 0); + break; + case 'b': // bin + { + int y; + for (y = 0; y < H; y++) + { + int v = 0, + x, + b = 128; + for (x = 0; x < W; x++) + { + if (grid[y * W + x]) + v |= b; + b >>= 1; + if (!b) + { + putchar (v); + v = 0; + b = 128; + } + } + if (b != 128) + putchar (v); + } + } + break; + case 't': // text + { + int y; + for (y = H - 1; y >= 0; y--) + { + int x; + for (x = 0; x < W; x++) + printf ("%c", grid[W * y + x] ? '*' : ' '); + printf ("\n"); + } + } + break; + case 'e': // EPS + printf ("%%!PS-Adobe-3.0 EPSF-3.0\n" "%%%%Creator: IEC16022 barcode/stamp generator\n" "%%%%BarcodeData: %s\n" + "%%%%BarcodeSize: %dx%d\n" "%%%%BarcodeFormat: ECC200\n" "%%%%DocumentData: Clean7Bit\n" "%%%%LanguageLevel: 1\n" + "%%%%Pages: 1\n" "%%%%BoundingBox: 0 0 %d %d\n" "%%%%EndComments\n" "%%%%Page: 1 1\n" "%d %d 1[1 0 0 1 -1 -1]{<\n", + barcode, W, H, W + 2, H + 2, W, H); + dumphex (grid, W, H, 0xFF); + printf (">}image\n"); + break; + case 's': // Stamp + { + char temp[74], + c; + time_t now; + struct tm t = { + 0 + }; + int v; + if (barcodelen < 74) + { + fprintf (stderr, "Does not look like a stamp barcode\n"); + return 1; + } + memcpy (temp, barcode, 74); + c = temp[5]; + temp[56] = 0; + t.tm_year = atoi (temp + 54) + 100; + t.tm_mday = 1; + now = mktime (&t); + temp[54] = 0; + now += 86400 * (atoi (temp + 51) - 1); + t = *gmtime (&now); + temp[46] = 0; + v = atoi (temp + 36); + printf ("%%!PS-Adobe-3.0 EPSF-3.0\n" "%%%%Creator: IEC16022 barcode/stamp generator\n" "%%%%BarcodeData: %s\n" + "%%%%BarcodeSize: %dx%d\n" "%%%%DocumentData: Clean7Bit\n" "%%%%LanguageLevel: 1\n" + "%%%%Pages: 1\n" "%%%%BoundingBox: 0 0 190 80\n" "%%%%EndComments\n" "%%%%Page: 1 1\n" + "10 dict begin/f{findfont exch scalefont setfont}bind def/rm/rmoveto load def/m/moveto load def/rl/rlineto load def\n" + "/l/lineto load def/cp/closepath load def/c{dup stringwidth pop -2 div 0 rmoveto show}bind def\n" + "gsave 72 25.4 div dup scale 0 0 m 67 0 rl 0 28 rl -67 0 rl cp clip 1 setgray fill 0 setgray 0.5 0 translate 0.3 setlinewidth\n" + "32 32 1[2 0 0 2 0 -11]{<\n", barcode, W, H); + dumphex (grid, W, H, 0xFF); + printf (">}image\n" + "3.25/Helvetica-Bold f 8 25.3 m(\\243%d.%02d)c\n" + "2.6/Helvetica f 8 22.3 m(%.4s %.4s)c\n" + "1.5/Helvetica f 8 3.3 m(POST BY)c\n" + "3.3/Helvetica f 8 0.25 m(%02d.%02d.%02d)c\n", + v / 100, v % 100, temp + 6, temp + 10, t.tm_mday, t.tm_mon + 1, t.tm_year % 100); + if (c == '1' || c == '2' || c == 'A' || c == 'S') + { + if (c == '2') + printf ("42 0 m 10 0 rl 0 28 rl -10 0 rl cp 57 0 m 5 0 rl 0 28 rl -5 0 rl cp"); + else + printf ("42 0 m 5 0 rl 0 28 rl -5 0 rl cp 52 0 m 10 0 rl 0 28 rl -10 0 rl cp"); + printf (" 21 0 m 16 0 rl 0 28 rl -16 0 rl cp fill\n" + "21.3 0.3 m 15.4 0 rl 0 13 rl -15.4 0 rl cp 1 setgray fill gsave 21.3 0.3 15.4 27.4 rectclip newpath\n"); + switch (c) + { + case '1': + printf + ("27/Helvetica-Bold f 27 8.7 m(1)show grestore 0 setgray 1.5/Helvetica-Bold f 22 3.3 m(POSTAGE PAID GB)show 1.7/Helvetica f 29 1.5 m(DumbStamp.co.uk)c\n"); + break; + case '2': + printf + ("21/Helvetica-Bold f 23.5 13 m(2)1.25 1 scale show grestore 0 setgray 1.5/Helvetica-Bold f 22 3.3 m(POSTAGE PAID GB)show 1.7/Helvetica f 29 1.5 m(DumbStamp.co.uk)c\n"); + break; + case 'A': + printf + ("16/Helvetica-Bold f 29 14.75 m 1.1 1 scale(A)c grestore 0 setgray 1.5/Helvetica-Bold f 22 3.3 m(POSTAGE PAID GB)show 1.7/Helvetica f 22 1.5 m(Par Avion)show\n"); + break; + case 'S': + printf ("10/Helvetica-Bold f 29 17 m(SU)c grestore 0 setgray 1.5/Helvetica-Bold f 22 1.5 m(POSTAGE PAID GB)show\n"); + break; + } + printf ("2.3/Helvetica-Bold f 29 10 m(LOYAL MAIL)c\n"); + } else if (c == 'P') + { // Standard Parcels + printf ("21 0 m 41 0 rl 0 28 rl -41 0 rl cp fill\n" + "37.7 0.3 m 24 0 rl 0 27.4 rl -24 0 rl cp 1 setgray fill gsave 21.3 0.3 16.4 27.4 rectclip newpath\n" + "22.5/Helvetica-Bold f 37.75 -1.25 m 90 rotate(SP)show grestore 0 setgray\n" + "3.5/Helvetica-Bold f 49.7 21.5 m(LOYAL MAIL)c\n" + "2.3/Helvetica-Bold f 49.7 7 m(POSTAGE PAID GB)c\n" "2.6/Helveica f 49.7 4.25 m(DumbStamp.co.uk)c\n"); + } else if (c == '3') + printf ("21.15 0.15 40.7 27.7 rectstroke\n" + "21 0 m 41 0 rl 0 5 rl -41 0 rl cp fill\n" + "0 1 2{0 1 18{dup 1.525 mul 22.9 add 24 3 index 1.525 mul add 3 -1 roll 9 add 29 div 0 360 arc fill}for pop}for\n" + "50.5 23.07 m 11.5 0 rl 0 5 rl -11.5 0 rl cp fill\n" + "5.85/Helvetica f 23.7 15.6 m(Loyal Mail)show\n" + "4.75/Helvetica-Bold f 24 11 m(special)show 4.9/Helvetica f(delivery)show\n" + "gsave 1 setgray 3.2/Helvetica-Bold f 24 1.6 m(next day)show 26 10.15 m 2 0 rl stroke grestore\n" + "21.15 9.9 m 53.8 9.9 l stroke 53.8 9.9 0.4 0 360 arc fill\n"); + printf ("end grestore\n"); + } + break; + case 'p': // png + { + int x, + y; + Image *i = ImageNew (W + 2, H + 2, 2); + i->Colour[0] = 0xFFFFFF; + i->Colour[1] = 0; + for (y = 0; y < H; y++) + for (x = 0; x < W; x++) + if (grid[y * W + x]) + ImagePixel (i, x + 1, H - y) = 1; + ImageWritePNG (i, fileno (stdout), 0, -1, barcode); + ImageFree (i); + } + break; + default: + fprintf (stderr, "Unknown output format %s\n", format); + break; + } + return 0; +} diff --git a/iec16022ecc200.c b/iec16022ecc200.c new file mode 100644 index 0000000..c5bc79e --- /dev/null +++ b/iec16022ecc200.c @@ -0,0 +1,936 @@ +/** + * + * IEC16022 bar code generation + * Adrian Kennard, Andrews & Arnold Ltd + * with help from Cliff Hones on the RS coding + * + * (c) 2004 Adrian Kennard, Andrews & Arnold Ltd + * (c) 2006 Stefan Schmidt + * + * This program is free software; you can redistribute it and/or modify + * it under the terms of the GNU General Public License as published by + * the Free Software Foundation; either version 2 of the License, or + * (at your option) any later version. + * + * This program is distributed in the hope that it will be useful, + * but WITHOUT ANY WARRANTY; without even the implied warranty of + * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the + * GNU General Public License for more details. + * + * You should have received a copy of the GNU General Public License + * along with this program; if not, write to the Free Software + * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA + * + */ + + +#include +#include +#include +#include +#include +#include +#include +#include "reedsol.h" +#include "iec16022ecc200.h" + +static struct ecc200matrix_s +{ + int H, + W; + int FH, + FW; + int bytes; + int datablock, + rsblock; +} +ecc200matrix[] = +{ + 10, 10, 10, 10, 3, 3, 5, // + 12, 12, 12, 12, 5, 5, 7, // + 8, 18, 8, 18, 5, 5, 7, // + 14, 14, 14, 14, 8, 8, 10, // + 8, 32, 8, 16, 10, 10, 11, // + 16, 16, 16, 16, 12, 12, 12, // + 12, 26, 12, 26, 16, 16, 14, // + 18, 18, 18, 18, 18, 18, 14, // + 20, 20, 20, 20, 22, 22, 18, // + 12, 36, 12, 18, 22, 22, 18, // + 22, 22, 22, 22, 30, 30, 20, // + 16, 36, 16, 18, 32, 32, 24, // + 24, 24, 24, 24, 36, 36, 24, // + 26, 26, 26, 26, 44, 44, 28, // + 16, 48, 16, 24, 49, 49, 28, // + 32, 32, 16, 16, 62, 62, 36, // + 36, 36, 18, 18, 86, 86, 42, // + 40, 40, 20, 20, 114, 114, 48, // + 44, 44, 22, 22, 144, 144, 56, // + 48, 48, 24, 24, 174, 174, 68, // + 52, 52, 26, 26, 204, 102, 42, // + 64, 64, 16, 16, 280, 140, 56, // + 72, 72, 18, 18, 368, 92, 36, // + 80, 80, 20, 20, 456, 114, 48, // + 88, 88, 22, 22, 576, 144, 56, // + 96, 96, 24, 24, 696, 174, 68, // + 104, 104, 26, 26, 816, 136, 56, // + 120, 120, 20, 20, 1050, 175, 68, // + 132, 132, 22, 22, 1304, 163, 62, // + 144, 144, 24, 24, 1558, 156, 62, // 156*4+155*2 + 0 // terminate +}; + + // simple checked response malloc +static void * +safemalloc (int n) +{ + void *p = malloc (n); + if (!p) + { + fprintf (stderr, "Malloc(%d) failed\n", n); + exit (1); + } + return p; +} + +// Annex M placement alorithm low level +static void +ecc200placementbit (int *array, int NR, int NC, int r, int c, int p, char b) +{ + if (r < 0) + { + r += NR; + c += 4 - ((NR + 4) % 8); + } + if (c < 0) + { + c += NC; + r += 4 - ((NC + 4) % 8); + } + array[r * NC + c] = (p << 3) + b; +} + +static void +ecc200placementblock (int *array, int NR, int NC, int r, int c, int p) +{ + ecc200placementbit (array, NR, NC, r - 2, c - 2, p, 7); + ecc200placementbit (array, NR, NC, r - 2, c - 1, p, 6); + ecc200placementbit (array, NR, NC, r - 1, c - 2, p, 5); + ecc200placementbit (array, NR, NC, r - 1, c - 1, p, 4); + ecc200placementbit (array, NR, NC, r - 1, c - 0, p, 3); + ecc200placementbit (array, NR, NC, r - 0, c - 2, p, 2); + ecc200placementbit (array, NR, NC, r - 0, c - 1, p, 1); + ecc200placementbit (array, NR, NC, r - 0, c - 0, p, 0); +} + +static void +ecc200placementcornerA (int *array, int NR, int NC, int p) +{ + ecc200placementbit (array, NR, NC, NR - 1, 0, p, 7); + ecc200placementbit (array, NR, NC, NR - 1, 1, p, 6); + ecc200placementbit (array, NR, NC, NR - 1, 2, p, 5); + ecc200placementbit (array, NR, NC, 0, NC - 2, p, 4); + ecc200placementbit (array, NR, NC, 0, NC - 1, p, 3); + ecc200placementbit (array, NR, NC, 1, NC - 1, p, 2); + ecc200placementbit (array, NR, NC, 2, NC - 1, p, 1); + ecc200placementbit (array, NR, NC, 3, NC - 1, p, 0); +} + +static void +ecc200placementcornerB (int *array, int NR, int NC, int p) +{ + ecc200placementbit (array, NR, NC, NR - 3, 0, p, 7); + ecc200placementbit (array, NR, NC, NR - 2, 0, p, 6); + ecc200placementbit (array, NR, NC, NR - 1, 0, p, 5); + ecc200placementbit (array, NR, NC, 0, NC - 4, p, 4); + ecc200placementbit (array, NR, NC, 0, NC - 3, p, 3); + ecc200placementbit (array, NR, NC, 0, NC - 2, p, 2); + ecc200placementbit (array, NR, NC, 0, NC - 1, p, 1); + ecc200placementbit (array, NR, NC, 1, NC - 1, p, 0); +} + +static void +ecc200placementcornerC (int *array, int NR, int NC, int p) +{ + ecc200placementbit (array, NR, NC, NR - 3, 0, p, 7); + ecc200placementbit (array, NR, NC, NR - 2, 0, p, 6); + ecc200placementbit (array, NR, NC, NR - 1, 0, p, 5); + ecc200placementbit (array, NR, NC, 0, NC - 2, p, 4); + ecc200placementbit (array, NR, NC, 0, NC - 1, p, 3); + ecc200placementbit (array, NR, NC, 1, NC - 1, p, 2); + ecc200placementbit (array, NR, NC, 2, NC - 1, p, 1); + ecc200placementbit (array, NR, NC, 3, NC - 1, p, 0); +} + +static void +ecc200placementcornerD (int *array, int NR, int NC, int p) +{ + ecc200placementbit (array, NR, NC, NR - 1, 0, p, 7); + ecc200placementbit (array, NR, NC, NR - 1, NC - 1, p, 6); + ecc200placementbit (array, NR, NC, 0, NC - 3, p, 5); + ecc200placementbit (array, NR, NC, 0, NC - 2, p, 4); + ecc200placementbit (array, NR, NC, 0, NC - 1, p, 3); + ecc200placementbit (array, NR, NC, 1, NC - 3, p, 2); + ecc200placementbit (array, NR, NC, 1, NC - 2, p, 1); + ecc200placementbit (array, NR, NC, 1, NC - 1, p, 0); +} + +// Annex M placement alorithm main function +static void +ecc200placement (int *array, int NR, int NC) +{ + int r, + c, + p; + // invalidate + for (r = 0; r < NR; r++) + for (c = 0; c < NC; c++) + array[r * NC + c] = 0; + // start + p = 1; + r = 4; + c = 0; + do + { + // check corner + if (r == NR && !c) + ecc200placementcornerA (array, NR, NC, p++); + if (r == NR - 2 && !c && NC % 4) + ecc200placementcornerB (array, NR, NC, p++); + if (r == NR - 2 && !c && (NC % 8) == 4) + ecc200placementcornerC (array, NR, NC, p++); + if (r == NR + 4 && c == 2 && !(NC % 8)) + ecc200placementcornerD (array, NR, NC, p++); + // up/right + do + { + if (r < NR && c >= 0 && !array[r * NC + c]) + ecc200placementblock (array, NR, NC, r, c, p++); + r -= 2; + c += 2; + } + while (r >= 0 && c < NC); + r++; + c += 3; + // down/left + do + { + if (r >= 0 && c < NC && !array[r * NC + c]) + ecc200placementblock (array, NR, NC, r, c, p++); + r += 2; + c -= 2; + } + while (r < NR && c >= 0); + r += 3; + c++; + } + while (r < NR || c < NC); + // unfilled corner + if (!array[NR * NC - 1]) + array[NR * NC - 1] = array[NR * NC - NC - 2] = 1; +} + +// calculate and append ecc code, and if necessary interleave +static void +ecc200 (unsigned char *binary, int bytes, int datablock, int rsblock) +{ + int blocks = (bytes + 2) / datablock, + b; + rs_init_gf (0x12d); + rs_init_code (rsblock, 1); + for (b = 0; b < blocks; b++) + { + unsigned char buf[256], + ecc[256]; + int n, + p = 0; + for (n = b; n < bytes; n += blocks) + buf[p++] = binary[n]; + rs_encode (p, buf, ecc); + p = rsblock - 1; // comes back reversed + for (n = b; n < rsblock * blocks; n += blocks) + binary[bytes + n] = ecc[p--]; + } +} + +// perform encoding for ecc200, source s len sl, to target t len tl, using optional encoding control string e +// return 1 if OK, 0 if failed. Does all necessary padding to tl +char +ecc200encode (unsigned char *t, int tl, unsigned char *s, int sl, char *encoding, int *lenp) +{ + char enc = 'a'; // start in ASCII encoding mode + int tp = 0, + sp = 0; + if (strlen (encoding) < sl) + { + fprintf (stderr, "Encoding string too short\n"); + return 0; + } + // do the encoding + while (sp < sl && tp < tl) + { + char newenc = enc; // suggest new encoding + if (tl - tp <= 1 && (enc == 'c' || enc == 't') || tl - tp <= 2 && enc == 'x') + enc = 'a'; // auto revert to ASCII + newenc = tolower (encoding[sp]); + switch (newenc) + { // encode character + case 'c': // C40 + case 't': // Text + case 'x': // X12 + { + char out[6], + p = 0; + const char *e, + *s2 = "!\"#$%&'()*+,-./:;<=>?@[\\]_", + *s3 = 0; + if (newenc == 'c') + { + e = " 0123456789ABCDEFGHIJKLMNOPQRSTUVWXYZ"; + s3 = "`abcdefghijklmnopqrstuvwxyz{|}~\177"; + } + if (newenc == 't') + { + e = " 0123456789abcdefghijklmnopqrstuvwxyz"; + s3 = "`ABCDEFGHIJKLMNOPQRSTUVWXYZ{|}~\177"; + } + if (newenc == 'x') + e = " 0123456789ABCDEFGHIJKLMNOPQRSTUVWXYZ\r*>"; + do + { + unsigned char c = s[sp++]; + char *w; + if (c & 0x80) + { + if (newenc == 'x') + { + fprintf (stderr, "Cannot encode char 0x%02X in X12\n", c); + return 0; + } + c &= 0x7f; + out[p++] = 1; + out[p++] = 30; + } + w = strchr (e, c); + if (w) + out[p++] = ((w - e) + 3) % 40; + else + { + if (newenc == 'x') + { + fprintf (stderr, "Cannot encode char 0x%02X in X12\n", c); + return 0; + } + if (c < 32) + { // shift 1 + out[p++] = 0; + out[p++] = c; + } else + { + w = strchr (s2, c); + if (w) + { // shift 2 + out[p++] = 1; + out[p++] = (w - s2); + } else + { + w = strchr (s3, c); + if (w) + { + out[p++] = 2; + out[p++] = (w - s3); + } else + { + fprintf (stderr, "Could not encode 0x%02X, should not happen\n", c); + return 0; + } + } + } + } + if (p == 2 && tp + 2 == tl && sp == sl) + out[p++] = 0; // shift 1 pad at end + while (p >= 3) + { + int v = out[0] * 1600 + out[1] * 40 + out[2] + 1; + if (enc != newenc) + { + if (enc == 'c' || enc == 't' || enc == 'x') + t[tp++] = 254; // escape C40/text/X12 + else if (enc == 'x') + t[tp++] = 0x7C; // escape EDIFACT + if (newenc == 'c') + t[tp++] = 230; + if (newenc == 't') + t[tp++] = 239; + if (newenc == 'x') + t[tp++] = 238; + enc = newenc; + } + t[tp++] = (v >> 8); + t[tp++] = (v & 0xFF); + p -= 3; + out[0] = out[3]; + out[1] = out[4]; + out[2] = out[5]; + } + } + while (p && sp < sl); + } + break; + case 'e': // EDIFACT + { + unsigned char out[4], + p = 0; + if (enc != newenc) + { // can only be from C40/Text/X12 + t[tp++] = 254; + enc = 'a'; + } + while (sp < sl && tolower (encoding[sp]) == 'e' && p < 4) + out[p++] = s[sp++]; + if (p < 4) + { + out[p++] = 0x1F; + enc = 'a'; + } // termination + t[tp] = ((s[0] & 0x3F) << 2); + t[tp++] |= ((s[1] & 0x30) >> 4); + t[tp] = ((s[1] & 0x0F) << 4); + if (p == 2) + tp++; + else + { + t[tp++] |= ((s[2] & 0x3C) >> 2); + t[tp] = ((s[2] & 0x03) << 6); + t[tp++] |= (s[3] & 0x3F); + } + } + break; + case 'a': // ASCII + if (enc != newenc) + { + if (enc == 'c' || enc == 't' || enc == 'x') + t[tp++] = 254; // escape C40/text/X12 + else + t[tp++] = 0x7C; // escape EDIFACT + } + enc = 'a'; + if (sl - sp >= 2 && isdigit (s[sp]) && isdigit (s[sp + 1])) + { + t[tp++] = (s[sp] - '0') * 10 + s[sp + 1] - '0' + 130; + sp += 2; + } else if (s[sp] > 127) + { + t[tp++] = 235; + t[tp++] = s[sp++] - 127; + } else + t[tp++] = s[sp++] + 1; + break; + case 'b': // Binary + { + int l = 0; // how much to encode + if (encoding) + { + int p; + for (p = sp; p < sl && tolower (encoding[p]) == 'b'; p++) + l++; + } + t[tp++] = 231; // base256 + if (l < 250) + t[tp++] = l; + else + { + t[tp++] = 249 + (l / 250); + t[tp++] = (l % 250); + } + while (l-- && tp < tl) + { + t[tp] = s[sp++] + (((tp + 1) * 149) % 255) + 1; // see annex H + tp++; + } + enc = 'a'; // reverse to ASCII at end + } + break; + default: + fprintf (stderr, "Unknown encoding %c\n", newenc); + return 0; // failed + } + } + if (lenp) + *lenp = tp; + if (tp < tl && enc != 'a') + { + if (enc == 'c' || enc == 'x' || enc == 't') + t[tp++] = 254; // escape X12/C40/Text + else + t[tp++] = 0x7C; // escape EDIFACT + } + if (tp < tl) + t[tp++] = 129; // pad + while (tp < tl) + { // more padding + int v = 129 + (((tp + 1) * 149) % 253) + 1; // see Annex H + if (v > 254) + v -= 254; + t[tp++] = v; + } + if (tp > tl || sp < sl) + return 0; // did not fit + //for (tp = 0; tp < tl; tp++) fprintf (stderr, "%02X ", t[tp]); fprintf (stderr, "\n"); + return 1; // OK +} + +// Auto encoding format functions +static char encchr[] = "ACTXEB"; + +enum +{ + E_ASCII, + E_C40, + E_TEXT, + E_X12, + E_EDIFACT, + E_BINARY, + E_MAX +}; + +unsigned char switchcost[E_MAX][E_MAX] = { + 0, 1, 1, 1, 1, 2, // From E_ASCII + 1, 0, 2, 2, 2, 3, // From E_C40 + 1, 2, 0, 2, 2, 3, // From E_TEXT + 1, 2, 2, 0, 2, 3, // From E_X12 + 1, 2, 2, 2, 0, 3, // From E_EDIFACT + 0, 1, 1, 1, 1, 0, // From E_BINARY +}; + +// Creates a encoding list (malloc) +// returns encoding string +// if lenp not null, target len stored +// if error, null returned +// if exact specified, then assumes shortcuts applicable for exact fit in target +// 1. No unlatch to return to ASCII for last encoded byte after C40 or Text or X12 +// 2. No unlatch to return to ASCII for last 1 or 2 encoded bytes after EDIFACT +// 3. Final C40 or text encoding exactly in last 2 bytes can have a shift 0 to pad to make a tripple +// Only use the encoding from an exact request if the len matches the target, otherwise free the result and try again with exact=0 +static char * +encmake (int l, unsigned char *s, int *lenp, char exact) +{ + char *encoding = 0; + int p = l; + char e; + struct + { + short s; // number of bytes of source that can be encoded in a row at this point using this encoding mode + short t; // number of bytes of target generated encoding from this point to end if already in this encoding mode + } enc[MAXBARCODE][E_MAX]; + memset (&enc, 0, sizeof (enc)); + if (!l) + return ""; // no length + if (l > MAXBARCODE) + return 0; // not valid + while (p--) + { + char b = 0, + sub; + int sl, + tl, + bl, + t; + // consider each encoding from this point + // ASCII + sl = tl = 1; + if (isdigit (s[p]) && p + 1 < l && isdigit (s[p + 1])) + sl = 2; // double digit + else if (s[p] & 0x80) + tl = 2; // high shifted + bl = 0; + if (p + sl < l) + for (e = 0; e < E_MAX; e++) + if (enc[p + sl][e].t && ((t = enc[p + sl][e].t + switchcost[E_ASCII][e]) < bl || !bl)) + { + bl = t; + b = e; + } + enc[p][E_ASCII].t = tl + bl; + enc[p][E_ASCII].s = sl; + if (bl && b == E_ASCII) + enc[p][b].s += enc[p + sl][b].s; + // C40 + sub = tl = sl = 0; + do + { + unsigned char c = s[p + sl++]; + if (c & 0x80) + { // shift + upper + sub += 2; + c &= 0x7F; + } + if (c != ' ' && !isdigit (c) && !isupper (c)) + sub++; // shift + sub++; + while (sub >= 3) + { + sub -= 3; + tl += 2; + } + } while (sub && p + sl < l); + if (exact && sub == 2 && p + sl == l) + { // special case, can encode last block with shift 0 at end (Is this valid when not end of target buffer?) + sub = 0; + tl += 2; + } + if (!sub) + { // can encode C40 + bl = 0; + if (p + sl < l) + for (e = 0; e < E_MAX; e++) + if (enc[p + sl][e].t && ((t = enc[p + sl][e].t + switchcost[E_C40][e]) < bl || !bl)) + { + bl = t; + b = e; + } + if (exact && enc[p + sl][E_ASCII].t == 1 && 1 < bl) + { // special case, switch to ASCII for last bytes + bl = 1; + b = E_ASCII; + } + enc[p][E_C40].t = tl + bl; + enc[p][E_C40].s = sl; + if (bl && b == E_C40) + enc[p][b].s += enc[p + sl][b].s; + } + // Text + sub = tl = sl = 0; + do + { + unsigned char c = s[p + sl++]; + if (c & 0x80) + { // shift + upper + sub += 2; + c &= 0x7F; + } + if (c != ' ' && !isdigit (c) && !islower (c)) + sub++; // shift + sub++; + while (sub >= 3) + { + sub -= 3; + tl += 2; + } + } while (sub && p + sl < l); + if (exact && sub == 2 && p + sl == l) + { // special case, can encode last block with shift 0 at end (Is this valid when not end of target buffer?) + sub = 0; + tl += 2; + } + if (!sub && sl) + { // can encode Text + bl = 0; + if (p + sl < l) + for (e = 0; e < E_MAX; e++) + if (enc[p + sl][e].t && ((t = enc[p + sl][e].t + switchcost[E_TEXT][e]) < bl || !bl)) + { + bl = t; + b = e; + } + if (exact && enc[p + sl][E_ASCII].t == 1 && 1 < bl) + { // special case, switch to ASCII for last bytes + bl = 1; + b = E_ASCII; + } + enc[p][E_TEXT].t = tl + bl; + enc[p][E_TEXT].s = sl; + if (bl && b == E_TEXT) + enc[p][b].s += enc[p + sl][b].s; + } + // X12 + sub = tl = sl = 0; + do + { + unsigned char c = s[p + sl++]; + if (c != 13 && c != '*' && c != '>' && c != ' ' && !isdigit (c) && !isupper (c)) + { + sl = 0; + break; + } + sub++; + while (sub >= 3) + { + sub -= 3; + tl += 2; + } + } while (sub && p + sl < l); + if (!sub && sl) + { // can encode X12 + bl = 0; + if (p + sl < l) + for (e = 0; e < E_MAX; e++) + if (enc[p + sl][e].t && ((t = enc[p + sl][e].t + switchcost[E_X12][e]) < bl || !bl)) + { + bl = t; + b = e; + } + if (exact && enc[p + sl][E_ASCII].t == 1 && 1 < bl) + { // special case, switch to ASCII for last bytes + bl = 1; + b = E_ASCII; + } + enc[p][E_X12].t = tl + bl; + enc[p][E_X12].s = sl; + if (bl && b == E_X12) + enc[p][b].s += enc[p + sl][b].s; + } + // EDIFACT + sl = bl = 0; + if (s[p + 0] >= 32 && s[p + 0] <= 94) + { // can encode 1 + char bs = 0; + if (p + 1 == l && (!bl || bl < 2)) + { + bl = 2; + bs = 1; + } else + for (e = 0; e < E_MAX; e++) + if (e != E_EDIFACT && enc[p + 1][e].t && ((t = 2 + enc[p + 1][e].t + switchcost[E_ASCII][e]) < bl || !bl)) // E_ASCII as allowed for unlatch + { + bs = 1; + bl = t; + b = e; + } + if (p + 1 < l && s[p + 1] >= 32 && s[p + 1] <= 94) + { // can encode 2 + if (p + 2 == l && (!bl || bl < 2)) + { + bl = 3; + bs = 2; + } else + for (e = 0; e < E_MAX; e++) + if (e != E_EDIFACT && enc[p + 2][e].t && ((t = 3 + enc[p + 2][e].t + switchcost[E_ASCII][e]) < bl || !bl)) // E_ASCII as allowed for unlatch + { + bs = 2; + bl = t; + b = e; + } + if (p + 2 < l && s[p + 2] >= 32 && s[p + 2] <= 94) + { // can encode 3 + if (p + 3 == l && (!bl || bl < 3)) + { + bl = 3; + bs = 3; + } else + for (e = 0; e < E_MAX; e++) + if (e != E_EDIFACT && enc[p + 3][e].t && ((t = 3 + enc[p + 3][e].t + switchcost[E_ASCII][e]) < bl || !bl)) // E_ASCII as allowed for unlatch + { + bs = 3; + bl = t; + b = e; + } + if (p + 4 < l && s[p + 3] >= 32 && s[p + 3] <= 94) + { // can encode 4 + if (p + 4 == l && (!bl || bl < 3)) + { + bl = 3; + bs = 4; + } else + { + for (e = 0; e < E_MAX; e++) + if (enc[p + 4][e].t && ((t = 3 + enc[p + 4][e].t + switchcost[E_EDIFACT][e]) < bl || !bl)) + { + bs = 4; + bl = t; + b = e; + } + if (exact && enc[p + 4][E_ASCII].t && enc[p + 4][E_ASCII].t <= 2 && (t = 3 + enc[p + 4][E_ASCII].t) < bl) + { // special case, switch to ASCII for last 1 ot two bytes + bs = 4; + bl = t; + b = E_ASCII; + } + } + } + } + } + enc[p][E_EDIFACT].t = bl; + enc[p][E_EDIFACT].s = bs; + if (bl && b == E_EDIFACT) + enc[p][b].s += enc[p + bs][b].s; + } + // Binary + bl = 0; + for (e = 0; e < E_MAX; e++) + if (enc[p + 1][e].t + && ((t = enc[p + 1][e].t + switchcost[E_BINARY][e] + ((e == E_BINARY && enc[p + 1][e].t == 249) ? 1 : 0)) < bl || !bl)) + { + bl = t; + b = e; + } + enc[p][E_BINARY].t = 1 + bl; + enc[p][E_BINARY].s = 1; + if (bl && b == E_BINARY) + enc[p][b].s += enc[p + 1][b].s; + //fprintf (stderr, "%d:", p); for (e = 0; e < E_MAX; e++) fprintf (stderr, " %c*%d/%d", encchr[e], enc[p][e].s, enc[p][e].t); fprintf (stderr, "\n"); + } + encoding = safemalloc (l + 1); + p = 0; + { + char cur = E_ASCII; // starts ASCII + while (p < l) + { + int t, + m = 0; + char b = 0; + for (e = 0; e < E_MAX; e++) + if (enc[p][e].t && ((t = enc[p][e].t + switchcost[cur][e]) < m || t == m && e == cur || !m)) + { + b = e; + m = t; + } + cur = b; + m = enc[p][b].s; + if (!p && lenp) + *lenp = enc[p][b].t; + while (p < l && m--) + encoding[p++] = encchr[b]; + } + } + encoding[p] = 0; + return encoding; +} + +// Main encoding function +// Returns the grid (malloced) containing the matrix. L corner at 0,0. +// Takes suggested size in *Wptr, *Hptr, or 0,0. Fills in actual size. +// Takes barcodelen and barcode to be encoded +// Note, if *encodingptr is null, then fills with auto picked (malloced) encoding +// If lenp not null, then the length of encoded data before any final unlatch or pad is stored +// If maxp not null, then the max storage of this size code is stored +// If eccp not null, then the number of ecc bytes used in this size is stored +// Returns 0 on error (writes to stderr with details). +unsigned char * +iec16022ecc200 (int *Wptr, int *Hptr, char **encodingptr, int barcodelen, unsigned char *barcode, int *lenp, int *maxp, int *eccp) +{ + unsigned char binary[3000]; // encoded raw data and ecc to place in barcode + int W = 0, + H = 0; + char *encoding = 0; + unsigned char *grid = 0; + struct ecc200matrix_s *matrix; + memset (binary, 0, sizeof (binary)); + if (encodingptr) + encoding = *encodingptr; + if (Wptr) + W = *Wptr; + if (Hptr) + H = *Hptr; + + // encoding + if (W) + { // known size + for (matrix = ecc200matrix; matrix->W && (matrix->W != W || matrix->H != H); matrix++); + if (!matrix->W) + { + fprintf (stderr, "Invalid size %dx%d\n", W, H); + return 0; + } + if (!encoding) + { + int len; + char *e = encmake (barcodelen, barcode, &len, 1); + if (e && len != matrix->bytes) + { // try not an exact fit + free (e); + e = encmake (barcodelen, barcode, &len, 0); + if (len > matrix->bytes) + { + fprintf (stderr, "Cannot make barcode fit %dx%d\n", W, H); + return 0; + } + } + encoding = e; + } + } else + { // find size + if (encoding) + { // find one that fits chosen encoding + for (matrix = ecc200matrix; matrix->W; matrix++) + if (ecc200encode (binary, matrix->bytes, barcode, barcodelen, encoding, 0)) + break; + } else + { + int len; + char *e; + e = encmake (barcodelen, barcode, &len, 1); + for (matrix = ecc200matrix; matrix->W && matrix->bytes != len; matrix++); + if (e && !matrix->W) + { // try for non exact fit + free (e); + e = encmake (barcodelen, barcode, &len, 0); + for (matrix = ecc200matrix; matrix->W && matrix->bytes < len; matrix++); + } + encoding = e; + } + if (!matrix->W) + { + fprintf (stderr, "Cannot find suitable size, barcode too long\n"); + return 0; + } + W = matrix->W; + H = matrix->H; + } + if (!ecc200encode (binary, matrix->bytes, barcode, barcodelen, encoding, lenp)) + { + fprintf (stderr, "Barcode too long for %dx%d\n", W, H); + return 0; + } + // ecc code + ecc200 (binary, matrix->bytes, matrix->datablock, matrix->rsblock); + { // placement + int x, + y, + NC, + NR, + *places; + NC = W - 2 * (W / matrix->FW); + NR = H - 2 * (H / matrix->FH); + places = safemalloc (NC * NR * sizeof (int)); + ecc200placement (places, NR, NC); + grid = safemalloc (W * H); + memset (grid, 0, W * H); + for (y = 0; y < H; y += matrix->FH) + { + for (x = 0; x < W; x++) + grid[y * W + x] = 1; + for (x = 0; x < W; x += 2) + grid[(y + matrix->FH - 1) * W + x] = 1; + } + for (x = 0; x < W; x += matrix->FW) + { + for (y = 0; y < H; y++) + grid[y * W + x] = 1; + for (y = 0; y < H; y += 2) + grid[y * W + x + matrix->FW - 1] = 1; + } + for (y = 0; y < NR; y++) + { + for (x = 0; x < NC; x++) + { + int v = places[(NR - y - 1) * NC + x]; + //fprintf (stderr, "%4d", v); + if (v == 1 || v > 7 && (binary[(v >> 3) - 1] & (1 << (v & 7)))) + grid[(1 + y + 2 * (y / (matrix->FH - 2))) * W + 1 + x + 2 * (x / (matrix->FW - 2))] = 1; + } + //fprintf (stderr, "\n"); + } + free (places); + } + if (Wptr) + *Wptr = W; + if (Hptr) + *Hptr = H; + if (encodingptr) + *encodingptr = encoding; + if (maxp) + *maxp = matrix->bytes; + if (eccp) + *eccp = (matrix->bytes + 2) / matrix->datablock * matrix->rsblock; + return grid; +} diff --git a/iec16022ecc200.h b/iec16022ecc200.h new file mode 100644 index 0000000..265dd31 --- /dev/null +++ b/iec16022ecc200.h @@ -0,0 +1,44 @@ +/** + * + * IEC16022 bar code generation + * Adrian Kennard, Andrews & Arnold Ltd + * with help from Cliff Hones on the RS coding + * + * (c) 2004 Adrian Kennard, Andrews & Arnold Ltd + * (c) 2006 Stefan Schmidt + * + * This program is free software; you can redistribute it and/or modify + * it under the terms of the GNU General Public License as published by + * the Free Software Foundation; either version 2 of the License, or + * (at your option) any later version. + * + * This program is distributed in the hope that it will be useful, + * but WITHOUT ANY WARRANTY; without even the implied warranty of + * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the + * GNU General Public License for more details. + * + * You should have received a copy of the GNU General Public License + * along with this program; if not, write to the Free Software + * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA + * + * + * Main encoding function + * Returns the grid (malloced) containing the matrix. L corner at 0,0. + * Takes suggested size in *Wptr, *Hptr, or 0,0. Fills in actual size. + * Takes barcodelen and barcode to be encoded + * Note, if *encodingptr is null, then fills with auto picked (malloced) + * encoding. + * If lenp not null, then the length of encoded data before any final unlatch + * or pad is stored. + * If maxp not null, then the max storage of this size code is stored + * If eccp not null, then the number of ecc bytes used in this size is stored + * Returns 0 on error (writes to stderr with details). + * + */ + + +unsigned char * +iec16022ecc200 (int *Wptr, int *Hptr, char **encodingptr, int barcodelen, \ + unsigned char *barcode, int *lenp,int *maxp,int *eccp); +#define MAXBARCODE 3116 + diff --git a/image.c b/image.c new file mode 100644 index 0000000..46a828d --- /dev/null +++ b/image.c @@ -0,0 +1,726 @@ +/** + * + * Image handling tools, (c) AJK 2001-2005 + * + * This program is free software; you can redistribute it and/or modify + * it under the terms of the GNU General Public License as published by + * the Free Software Foundation; either version 2 of the License, or + * (at your option) any later version. + * + * This program is distributed in the hope that it will be useful, + * but WITHOUT ANY WARRANTY; without even the implied warranty of + * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the + * GNU General Public License for more details. + * + * You should have received a copy of the GNU General Public License + * along with this program; if not, write to the Free Software + * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA + * + */ + + +#include +#include +#include +#include +#include "image.h" + +#define INTERLACE +#define CLEAR +#define USEZLIB + +#ifdef USEZLIB +#include +#endif + +unsigned char const bbc[] = { + 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, // + 0x18, 0x18, 0x18, 0x18, 0x18, 0x00, 0x18, 0x00, // ! + 0x6C, 0x6C, 0x6C, 0x00, 0x00, 0x00, 0x00, 0x00, // " + 0x36, 0x36, 0x7F, 0x36, 0x7F, 0x36, 0x36, 0x00, // # + 0x0C, 0x3F, 0x68, 0x3E, 0x0B, 0x7E, 0x18, 0x00, // $ + 0x60, 0x66, 0x0C, 0x18, 0x30, 0x66, 0x06, 0x00, // % + 0x38, 0x6C, 0x6C, 0x38, 0x6D, 0x66, 0x3B, 0x00, // & + 0x0C, 0x18, 0x30, 0x00, 0x00, 0x00, 0x00, 0x00, // ' + 0x0C, 0x18, 0x30, 0x30, 0x30, 0x18, 0x0C, 0x00, // ( + 0x30, 0x18, 0x0C, 0x0C, 0x0C, 0x18, 0x30, 0x00, // ) + 0x00, 0x18, 0x7E, 0x3C, 0x7E, 0x18, 0x00, 0x00, // * + 0x00, 0x18, 0x18, 0x7E, 0x18, 0x18, 0x00, 0x00, // + + 0x00, 0x00, 0x00, 0x00, 0x00, 0x18, 0x18, 0x30, // , + 0x00, 0x00, 0x00, 0x7E, 0x00, 0x00, 0x00, 0x00, // - + 0x00, 0x00, 0x00, 0x00, 0x00, 0x18, 0x18, 0x00, // . + 0x00, 0x06, 0x0C, 0x18, 0x30, 0x60, 0x00, 0x00, // / + 0x18, 0x24, 0x66, 0x66, 0x66, 0x24, 0x18, 0x00, // 0 (non crossed) + 0x18, 0x38, 0x18, 0x18, 0x18, 0x18, 0x7E, 0x00, // 1 + 0x3C, 0x66, 0x06, 0x0C, 0x18, 0x30, 0x7E, 0x00, // 2 + 0x3C, 0x66, 0x06, 0x1C, 0x06, 0x66, 0x3C, 0x00, // 3 + 0x0C, 0x1C, 0x3C, 0x6C, 0x7E, 0x0C, 0x0C, 0x00, // 4 + 0x7E, 0x60, 0x7C, 0x06, 0x06, 0x66, 0x3C, 0x00, // 5 + 0x1C, 0x30, 0x60, 0x7C, 0x66, 0x66, 0x3C, 0x00, // 6 + 0x7E, 0x06, 0x0C, 0x18, 0x30, 0x30, 0x30, 0x00, // 7 + 0x3C, 0x66, 0x66, 0x3C, 0x66, 0x66, 0x3C, 0x00, // 8 + 0x3C, 0x66, 0x66, 0x3E, 0x06, 0x0C, 0x38, 0x00, // 9 + 0x00, 0x00, 0x18, 0x18, 0x00, 0x18, 0x18, 0x00, // : + 0x00, 0x00, 0x18, 0x18, 0x00, 0x18, 0x18, 0x30, // ; + 0x0C, 0x18, 0x30, 0x60, 0x30, 0x18, 0x0C, 0x00, // < + 0x00, 0x00, 0x7E, 0x00, 0x7E, 0x00, 0x00, 0x00, // = + 0x30, 0x18, 0x0C, 0x06, 0x0C, 0x18, 0x30, 0x00, // > + 0x3C, 0x66, 0x0C, 0x18, 0x18, 0x00, 0x18, 0x00, // ? + 0x3C, 0x66, 0x6E, 0x6A, 0x6E, 0x60, 0x3C, 0x00, // @ + 0x3C, 0x66, 0x66, 0x7E, 0x66, 0x66, 0x66, 0x00, // A + 0x7C, 0x66, 0x66, 0x7C, 0x66, 0x66, 0x7C, 0x00, // B + 0x3C, 0x66, 0x60, 0x60, 0x60, 0x66, 0x3C, 0x00, // C + 0x78, 0x6C, 0x66, 0x66, 0x66, 0x6C, 0x78, 0x00, // D + 0x7E, 0x60, 0x60, 0x7C, 0x60, 0x60, 0x7E, 0x00, // E + 0x7E, 0x60, 0x60, 0x7C, 0x60, 0x60, 0x60, 0x00, // F + 0x3C, 0x66, 0x60, 0x6E, 0x66, 0x66, 0x3C, 0x00, // G + 0x66, 0x66, 0x66, 0x7E, 0x66, 0x66, 0x66, 0x00, // H + 0x7E, 0x18, 0x18, 0x18, 0x18, 0x18, 0x7E, 0x00, // I + 0x3E, 0x0C, 0x0C, 0x0C, 0x0C, 0x6C, 0x38, 0x00, // J + 0x66, 0x6C, 0x78, 0x70, 0x78, 0x6C, 0x66, 0x00, // K + 0x60, 0x60, 0x60, 0x60, 0x60, 0x60, 0x7E, 0x00, // L + 0x63, 0x77, 0x7F, 0x6B, 0x6B, 0x63, 0x63, 0x00, // M + 0x66, 0x66, 0x76, 0x7E, 0x6E, 0x66, 0x66, 0x00, // N + 0x3C, 0x66, 0x66, 0x66, 0x66, 0x66, 0x3C, 0x00, // O + 0x7C, 0x66, 0x66, 0x7C, 0x60, 0x60, 0x60, 0x00, // P + 0x3C, 0x66, 0x66, 0x66, 0x6A, 0x6C, 0x36, 0x00, // Q + 0x7C, 0x66, 0x66, 0x7C, 0x6C, 0x66, 0x66, 0x00, // R + 0x3C, 0x66, 0x60, 0x3C, 0x06, 0x66, 0x3C, 0x00, // S + 0x7E, 0x18, 0x18, 0x18, 0x18, 0x18, 0x18, 0x00, // T + 0x66, 0x66, 0x66, 0x66, 0x66, 0x66, 0x3C, 0x00, // U + 0x66, 0x66, 0x66, 0x66, 0x66, 0x3C, 0x18, 0x00, // V + 0x63, 0x63, 0x6B, 0x6B, 0x7F, 0x77, 0x63, 0x00, // W + 0x66, 0x66, 0x3C, 0x18, 0x3C, 0x66, 0x66, 0x00, // X + 0x66, 0x66, 0x66, 0x3C, 0x18, 0x18, 0x18, 0x00, // Y + 0x7E, 0x06, 0x0C, 0x18, 0x30, 0x60, 0x7E, 0x00, // Z + 0x7C, 0x60, 0x60, 0x60, 0x60, 0x60, 0x7C, 0x00, // [ + 0x00, 0x60, 0x30, 0x18, 0x0C, 0x06, 0x00, 0x00, // + 0x3E, 0x06, 0x06, 0x06, 0x06, 0x06, 0x3E, 0x00, // ] + 0x18, 0x3C, 0x66, 0x42, 0x00, 0x00, 0x00, 0x00, // ^ + 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0xFF, // _ + 0x1C, 0x36, 0x30, 0x7C, 0x30, 0x30, 0x7E, 0x00, // ` + 0x00, 0x00, 0x3C, 0x06, 0x3E, 0x66, 0x3E, 0x00, // a + 0x60, 0x60, 0x7C, 0x66, 0x66, 0x66, 0x7C, 0x00, // b + 0x00, 0x00, 0x3C, 0x66, 0x60, 0x66, 0x3C, 0x00, // c + 0x06, 0x06, 0x3E, 0x66, 0x66, 0x66, 0x3E, 0x00, // d + 0x00, 0x00, 0x3C, 0x66, 0x7E, 0x60, 0x3C, 0x00, // e + 0x1C, 0x30, 0x30, 0x7C, 0x30, 0x30, 0x30, 0x00, // f + 0x00, 0x00, 0x3E, 0x66, 0x66, 0x3E, 0x06, 0x3C, // g + 0x60, 0x60, 0x7C, 0x66, 0x66, 0x66, 0x66, 0x00, // h + 0x18, 0x00, 0x38, 0x18, 0x18, 0x18, 0x3C, 0x00, // i + 0x18, 0x00, 0x38, 0x18, 0x18, 0x18, 0x18, 0x70, // j + 0x60, 0x60, 0x66, 0x6C, 0x78, 0x6C, 0x66, 0x00, // k + 0x38, 0x18, 0x18, 0x18, 0x18, 0x18, 0x3C, 0x00, // l + 0x00, 0x00, 0x36, 0x7F, 0x6B, 0x6B, 0x63, 0x00, // m + 0x00, 0x00, 0x7C, 0x66, 0x66, 0x66, 0x66, 0x00, // n + 0x00, 0x00, 0x3C, 0x66, 0x66, 0x66, 0x3C, 0x00, // o + 0x00, 0x00, 0x7C, 0x66, 0x66, 0x7C, 0x60, 0x60, // p + 0x00, 0x00, 0x3E, 0x66, 0x66, 0x3E, 0x06, 0x07, // q + 0x00, 0x00, 0x6C, 0x76, 0x60, 0x60, 0x60, 0x00, // r + 0x00, 0x00, 0x3E, 0x60, 0x3C, 0x06, 0x7C, 0x00, // s + 0x30, 0x30, 0x7C, 0x30, 0x30, 0x30, 0x1C, 0x00, // t + 0x00, 0x00, 0x66, 0x66, 0x66, 0x66, 0x3E, 0x00, // u + 0x00, 0x00, 0x66, 0x66, 0x66, 0x3C, 0x18, 0x00, // v + 0x00, 0x00, 0x63, 0x6B, 0x6B, 0x7F, 0x36, 0x00, // w + 0x00, 0x00, 0x66, 0x3C, 0x18, 0x3C, 0x66, 0x00, // x + 0x00, 0x00, 0x66, 0x66, 0x66, 0x3E, 0x06, 0x3C, // y + 0x00, 0x00, 0x7E, 0x0C, 0x18, 0x30, 0x7E, 0x00, // z + 0x0C, 0x18, 0x18, 0x70, 0x18, 0x18, 0x0C, 0x00, // { + 0x18, 0x18, 0x18, 0x00, 0x18, 0x18, 0x18, 0x00, // | + 0x30, 0x18, 0x18, 0x0E, 0x18, 0x18, 0x30, 0x00, // } + 0x31, 0x6B, 0x46, 0x00, 0x00, 0x00, 0x00, 0x00, // ~ + 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, // +}; + +const char smallc[] = " 0123456789ABCDEFGHIJKLMNOPQRSTUVWXYZ-+&()/[];%"; +unsigned char const small[] = { + 0x00, 0x00, 0x00, // + 0x1F, 0x11, 0x1F, //0 + 0x11, 0x1F, 0x10, //1 + 0x1D, 0x15, 0x17, //2 + 0x11, 0x15, 0x1F, //3 + 0x07, 0x04, 0x1F, //4 + 0x17, 0x15, 0x1D, //5 + 0x1F, 0x15, 0x1D, //6 + 0x01, 0x01, 0x1F, //7 + 0x1F, 0x15, 0x1F, //8 + 0x17, 0x15, 0x1F, //9 + 0x1E, 0x05, 0x1E, //A + 0x1F, 0x15, 0x0A, //B + 0x0E, 0x11, 0x11, //C + 0x1F, 0x11, 0x0E, //D + 0x1F, 0x15, 0x11, //E + 0x1F, 0x05, 0x01, //F + 0x0E, 0x11, 0x19, //G + 0x1F, 0x04, 0x1F, //H + 0x11, 0x1F, 0x11, //I + 0x11, 0x0F, 0x01, //J + 0x1F, 0x04, 0x1B, //K + 0x1F, 0x10, 0x10, //L + 0x1F, 0x03, 0x1F, //M + 0x1F, 0x01, 0x1F, //N + 0x0E, 0x11, 0x0E, //O + 0x1F, 0x05, 0x02, //P + 0x0E, 0x19, 0x1E, //Q + 0x1F, 0x05, 0x1A, //R + 0x12, 0x15, 0x09, //S + 0x01, 0x1F, 0x01, //T + 0x1F, 0x10, 0x1F, //U + 0x0F, 0x10, 0x0F, //V + 0x1F, 0x18, 0x1F, //W + 0x1B, 0x04, 0x1B, //X + 0x03, 0x1C, 0x03, //Y + 0x19, 0x15, 0x13, //Z + 0x04, 0x04, 0x04, //- + 0x04, 0x0E, 0x04, //+ + 0x04, 0x0E, 0x04, //& (+) + 0x00, 0x0E, 0x11, //( + 0x11, 0x0E, 0x00, //) + 0x08, 0x04, 0x02, /// + 0x00, 0x1F, 0x11, //[ + 0x11, 0x1F, 0x00, //] + 0x10, 0x0A, 0x00, //; + 0x09, 0x04, 0x12, //% +}; + +Image * +ImageNew (int w, int h, int c) +{ // create a new blank image + Image *i; + if (!w || !h) + return 0; + i = malloc (sizeof (*i)); + if (!i) + return 0; + memset (i, 0, sizeof (*i)); + i->W = w; + i->L = w + 1; + i->H = h; + i->C = c; + i->Image = malloc ((w + 1) * h); + if (!i->Image) + { + free (i); + return 0; + } + memset (i->Image, 0, (w + 1) * h); + if (c) + { + i->Colour = malloc (sizeof (Colour) * c); + if (!i->Colour) + { + free (i->Image); + free (i); + return 0; + } + memset (i->Colour, 0, sizeof (Colour) * c); + } + return i; +} + +void +ImageFree (Image * i) +{ // free an image + if (i) + { + if (i->Image) + free (i->Image); + if (i->Colour) + free (i->Colour); + free (i); + } +} + +#define MAXLZW 4096 +typedef short LZW[256]; +typedef LZW LZWTree[MAXLZW]; +typedef struct strPrivate +{ + int cols; // number of colours, power of 2 + unsigned char colbits; // number of bits for colours + int fh; // file handle + int lzwnext; // next code + int lzwlast; // last code in current bit size + int lzwbits; // current bit size + LZWTree lzw; // encode tree + unsigned char block[256]; // block so far, with count at start + int blockv; // pending value + int blockb; // bits used in pending value + short lzwcode; // which code we are on now +} +Private; + +static +LZWFlush (Private * p) +{ // flush this block + write (p->fh, p->block, *p->block + 1); + *p->block = 0; +} + +static +LZWOut (Private * p, short v) +{ // output a value + p->blockv |= (v << p->blockb); + p->blockb += p->lzwbits; + while (p->blockb >= 8) + { + p->block[++*p->block] = p->blockv; // last partial byte + p->blockv >>= 8; + p->blockb -= 8; + if (*p->block == 255) + LZWFlush (p); + } +} + +static +LZWClear (Private * p) +{ + int c; + p->lzwbits = p->colbits + 1; + p->lzwnext = p->cols + 2; + p->lzwlast = (1 << p->lzwbits) - 1; + p->lzwcode = p->cols; // starting point + for (c = 0; c < p->cols; c++) + { + p->lzw[p->cols][c] = c; // links to literal entries + memset (&p->lzw[c], -1, p->cols * 2); // links from literals, dead ends initially + } +} + +static +ImageStart (Private * p) +{ + unsigned char b = p->colbits; + write (p->fh, &b, 1); + *p->block = 0; + p->blockb = 0; + p->blockv = 0; + LZWClear (p); + LZWOut (p, p->cols); // clear code +} + +static +ImageEnd (Private * p) +{ + LZWOut (p, p->lzwcode); // last prefix + LZWOut (p, p->cols + 1); // end code + if (p->blockb) + p->block[++*p->block] = p->blockv; // last partial byte + LZWFlush (p); +} + +static +ImageOut (Private * p, unsigned char c) +{ + short next = p->lzw[p->lzwcode][c]; + if (next == -1) + { // dead end + LZWOut (p, p->lzwcode); // prefix +#ifdef CLEAR + if (p->lzwnext + 1 == MAXLZW) + { + LZWOut (p, p->cols); // clear code + LZWClear (p); + } else +#endif + if (p->lzwnext < MAXLZW) + { + memset (p->lzw[p->lzwnext], -1, p->cols * 2); // init dead ends + p->lzw[p->lzwcode][c] = p->lzwnext; + if (p->lzwnext > p->lzwlast) + { // bigger code + p->lzwbits++; + p->lzwlast = (1 << p->lzwbits) - 1; + } + p->lzwnext++; + } + p->lzwcode = c; + } else + p->lzwcode = next; // not a dead end +} + +// write GIF image +void +ImageWriteGif (Image * i, int fh, int back, int trans, char *comment) +{ + struct strPrivate p; + p.fh = fh; + for (p.colbits = 2, p.cols = 4; p.cols < i->C; p.cols *= 2, p.colbits++); // count colours, min 4 + { // headers + char buf[1500]; + int n = 0; + strcpy (buf, "GIF87a"); +#ifndef INTERLACE + if (comment || trans >= 0) +#endif + buf[4] = '9'; // needs gif89 format + n = 6; + buf[n++] = (i->W & 255); + buf[n++] = (i->W >> 8); + buf[n++] = (i->H & 255); + buf[n++] = (i->H >> 8); + buf[n++] = (i->Colour ? 0x80 : 0) + 0x70 + (p.colbits - 1); + buf[n++] = back; // background + buf[n++] = 0; // aspect + if (i->Colour) + { + int c; + for (c = 0; c < p.cols; c++) + { + if (c < i->C) + { + buf[n++] = (i->Colour[c] >> 16 & 255); + buf[n++] = (i->Colour[c] >> 8 & 255); + buf[n++] = (i->Colour[c] & 255); + } else + { // extra, unused, colour + buf[n++] = 0; + buf[n++] = 0; + buf[n++] = 0; + } + } + } + // comment + if (comment && strlen (comment) < 256) + { // comment + buf[n++] = 0x21; //extension + buf[n++] = 0xFE; //comment + buf[n++] = strlen (comment); + strcpy (buf + n, comment); + n += buf[n - 1]; + buf[n++] = 0; // end of block + } + if (trans >= 0) + { // transparrent + buf[n++] = 0x21; // extension + buf[n++] = 0xF9; // graphic control + buf[n++] = 4; // len + buf[n++] = 1; // transparrent + buf[n++] = 0; // delay + buf[n++] = 0; + buf[n++] = trans; + buf[n++] = 0; // terminator + } + // image + buf[n++] = 0x2C; + buf[n++] = 0; // offset X + buf[n++] = 0; + buf[n++] = 0; // offset Y + buf[n++] = 0; + buf[n++] = (i->W & 255); + buf[n++] = (i->W >> 8); + buf[n++] = (i->H & 255); + buf[n++] = (i->H >> 8); +#ifdef INTERLACE + buf[n++] = 0x40; // interlaced, no local colour table +#else + buf[n++] = 0x00; // non interlaced, no local colour table +#endif + write (fh, buf, n); + } + // image data + { + unsigned char *b; + int x, + y; + ImageStart (&p); +#ifdef INTERLACE + for (y = 0; y < i->H; y += 8) + for (b = &ImagePixel (i, 0, y), x = 0; x < i->W; x++) + ImageOut (&p, *b++); + for (y = 4; y < i->H; y += 8) + for (b = &ImagePixel (i, 0, y), x = 0; x < i->W; x++) + ImageOut (&p, *b++); + for (y = 2; y < i->H; y += 4) + for (b = &ImagePixel (i, 0, y), x = 0; x < i->W; x++) + ImageOut (&p, *b++); + for (y = 1; y < i->H; y += 2) + for (b = &ImagePixel (i, 0, y), x = 0; x < i->W; x++) + ImageOut (&p, *b++); +#else + for (y = 0; y < i->H; y++) + for (b = &ImagePixel (i, 0, y), x = 0; x < i->W; x++) + ImageOut (&p, *b++); +#endif + ImageEnd (&p); + } + write (fh, "\0", 1); // end of image data + write (fh, "\x3B", 1); // trailer +} + +void +ImageText (Image * i, int x, int y, int col, char *text) +{ // writes 8x8 text + if (i && text) + while (*text) + { + if (*text >= ' ' && *text) + { + int r; + unsigned const char *b = bbc + (*text - ' ') * 8; + for (r = 0; r < 8; r++) + { + unsigned char v = *b++; + unsigned char *p = &ImagePixel (i, x, y + r); + unsigned char m; + for (m = 0x80; m; m >>= 1, p++) + if (v & m) + *p = col; + } + } + x += 8; + text++; + } +} + +void +ImageSmall (Image * i, int x, int y, int col, char *text) +{ // writes 4x6 digits + if (i && text) + while (*text) + { + char *p = strchr (smallc, toupper (*text)); + if (p) + { + int r; + char m = 1; + unsigned const char *b = small + (p - smallc) * 3; + for (r = 0; r < 5; r++) + { + int c; + for (c = 0; c < 3; c++) + if (b[c] & m) + ImagePixel (i, x + c, y + r) = col; + m <<= 1; + } + x += 4; + } else if (*text == '.') + { + ImagePixel (i, x, y + 4) = col; + x += 2; + } else if (*text == ':') + { + ImagePixel (i, x, y + 1) = col; + ImagePixel (i, x, y + 3) = col; + x += 2; + } + text++; + } +} + +void +ImageRect (Image * i, int x, int y, int w, int h, int c) +{ // fill a box + if (i && w && h) + { + while (h--) + { + unsigned char *p = &ImagePixel (i, x, y); + int n = w; + while (n--) + *p++ = c; + y++; + } + } +} + +// PNG code + + /* Table of CRCs of all 8-bit messages. */ +static unsigned int crc_table[256]; + + /* Make the table for a fast CRC. */ +void +make_crc_table (void) +{ + unsigned int c; + int n, + k; + for (n = 0; n < 256; n++) + { + c = (unsigned int) n; + for (k = 0; k < 8; k++) + { + if (c & 1) + c = 0xedb88320L ^ (c >> 1); + else + c = c >> 1; + } + crc_table[n] = c; + } +} + + /* Update a running CRC with the bytes buf[0..len-1]--the CRC + should be initialized to all 1's, and the transmitted value + is the 1's complement of the final running CRC (see the + crc() routine below)). */ + +unsigned int +update_crc (unsigned int crc, unsigned char *buf, int len) +{ + unsigned int c = crc; + int n; + + for (n = 0; n < len; n++) + c = crc_table[(c ^ buf[n]) & 0xff] ^ (c >> 8); + + return c; +} + + /* Return the CRC of the bytes buf[0..len-1]. */ +unsigned int +crc (unsigned char *buf, int len) +{ + return update_crc (0xffffffffL, buf, len) ^ 0xffffffffL; +} + +unsigned int +writecrc (int fh, char *ptr, int len, unsigned int c) +{ + write (fh, ptr, len); + while (len--) + c = crc_table[(c ^ *ptr++) & 0xff] ^ (c >> 8); + return c; +} + +void +writechunk (int fh, char *typ, void *ptr, int len) +{ + unsigned int v = htonl (len), + crc; + write (fh, &v, 4); + crc = writecrc (fh, typ, 4, ~0); + if (len) + crc = writecrc (fh, ptr, len, crc); + v = htonl (~crc); + write (fh, &v, 4); +} + +#ifndef USEZLIB +unsigned int +adlersum (unsigned char *p, int l, unsigned int adler) +{ + unsigned int s1 = (adler & 65535), + s2 = (adler >> 16); + while (l--) + { + s1 += *p++; + s2 += s1; + } + s1 %= 65521; // can be delayed due to sensible "l" values... + s2 %= 65521; + return (s2 << 16) + s1; +} +#endif + +// write PNG image +void +ImageWritePNG (Image * i, int fh, int back, int trans, char *comment) +{ + make_crc_table (); + write (fh, "\211PNG\r\n\032\n", 8); // PNG header + { // IHDR + struct + { + unsigned int width; + unsigned int height; + unsigned char depth; + unsigned char colour; + unsigned char compress; + unsigned char filter; + unsigned char interlace; + } + ihdr = + { + 0, 0, 8, 3, 0, 0}; + ihdr.width = htonl (i->W); + ihdr.height = htonl (i->H); + writechunk (fh, "IHDR", &ihdr, 13); + } + { // PLTE + unsigned int v = htonl (i->C * 3), + crc, + n; + write (fh, &v, 4); + crc = writecrc (fh, "PLTE", 4, ~0); + for (n = 0; n < i->C; n++) + { + v = htonl (i->Colour[n] << 8); + crc = writecrc (fh, (void *) &v, 3, crc); + } + v = htonl (~crc); + write (fh, &v, 4); + } + if (back >= 0) + { // bKGD + unsigned char b = back; + writechunk (fh, "bKGD", &b, 1); + } + if (*comment) + { // tEXt + char c[] = "Comment"; + unsigned int v = htonl (strlen (c) + strlen (comment) + 1), + crc; + write (fh, &v, 4); + crc = writecrc (fh, "tEXt", 4, ~0); + crc = writecrc (fh, c, strlen (c) + 1, crc); + crc = writecrc (fh, comment, strlen (comment), crc); + v = htonl (~crc); + write (fh, &v, 4); + } + { // tRNS + unsigned char alpha[256]; + int n; + for (n = 0; n < i->C; n++) + alpha[n] = 255 - (i->Colour[n] >> 24); // 4th palette byte treated as 0=opaque, 255-transparrent + if (trans >= 0 && trans < i->C) + alpha[trans] = 0; // manual set of specific transparrent colour + writechunk (fh, "tRNS", alpha, i->C); + } +#ifndef USEZLIB + { // IDAT + unsigned int v = htonl (i->H * (i->L + 5) + 6), + crc, + adler = 1, + n; + unsigned char *p = i->Image; + write (fh, &v, 4); + crc = writecrc (fh, "IDAT", 4, ~0); + crc = writecrc (fh, "\170\001", 2, crc); // zlib header for deflate + n = i->H; + while (n--) + { + unsigned char h[5]; + h[0] = (n ? 0 : 1); // last chunk in deflate, un compressed + h[1] = (i->L & 255); // Len, LSB first as per deflate spec + h[2] = (i->L / 256); + h[3] = ~(i->L & 255); // Inverse of Len + h[4] = ~(i->L / 256); + *p = 0; // filter 0 (NONE) + crc = writecrc (fh, h, 5, crc); + crc = writecrc (fh, p, i->L, crc); + adler = adlersum (p, i->L, adler); + p += i->L; + } + v = htonl (adler); + crc = writecrc (fh, (void *) &v, 4, crc); + v = htonl (~crc); + write (fh, &v, 4); + } +#else + { // IDAT + unsigned char *temp; + unsigned long n; + for (n = 0; n < i->H; n++) + i->Image[n * i->L] = 0; // filter 0 + n = i->H * i->L * 1001 / 1000 + 12; + temp = malloc (n); + if (compress2 (temp, &n, i->Image, i->L * i->H, 9) != Z_OK) + fprintf (stderr, "Deflate error\n"); + else + writechunk (fh, "IDAT", temp, n); + free (temp); + } +#endif + writechunk (fh, "IEND", 0, 0); // IEND +} diff --git a/image.h b/image.h new file mode 100644 index 0000000..b742bf4 --- /dev/null +++ b/image.h @@ -0,0 +1,46 @@ +/** + * + * Image handling tools, (c) AJK 2001-2005 + * + * This program is free software; you can redistribute it and/or modify + * it under the terms of the GNU General Public License as published by + * the Free Software Foundation; either version 2 of the License, or + * (at your option) any later version. + * + * This program is distributed in the hope that it will be useful, + * but WITHOUT ANY WARRANTY; without even the implied warranty of + * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the + * GNU General Public License for more details. + * + * You should have received a copy of the GNU General Public License + * along with this program; if not, write to the Free Software + * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA + * + */ + +typedef unsigned int Colour; // RGB value + +// Image object +typedef struct +{ + int W, // width + L, // Line length in Image (W+1) + H; // height + unsigned char *Image; // image array, one byte per pixel + int C; // colours (can be non power of 2, max 256) + Colour *Colour; // colour map (must have entry for each colour) +} +Image; + +// macros and functions + +#define ImagePixel(i,x,y) ((i)->Image[1+(i)->L*(y)+(x)]) + +Image *ImageNew(int w,int h,int c); // create a new blank image +void ImageFree(Image* i); // free an image +void ImageWriteGif(Image *i,int fh,int back,int trans,char *comment); +void ImageWritePNG(Image *i,int fh,int back,int trans,char *comment); +void ImageText(Image *i,int x,int y,int c,char *text); // write 8x8 text +void ImageSmall(Image *i,int x,int y,int c,char *text); // write 4x6 text +void ImageRect(Image *i,int x,int y,int w,int h,int c); // fill a box +#define ImageWrite ImageWritePNG // default diff --git a/reedsol.c b/reedsol.c new file mode 100644 index 0000000..fee1dc5 --- /dev/null +++ b/reedsol.c @@ -0,0 +1,187 @@ +/** + * + * This is a simple Reed-Solomon encoder + * (C) Cliff Hones 2004 + * + * This program is free software; you can redistribute it and/or modify + * it under the terms of the GNU General Public License as published by + * the Free Software Foundation; either version 2 of the License, or + * (at your option) any later version. + * + * This program is distributed in the hope that it will be useful, + * but WITHOUT ANY WARRANTY; without even the implied warranty of + * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the + * GNU General Public License for more details. + * + * You should have received a copy of the GNU General Public License + * along with this program; if not, write to the Free Software + * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA + * + */ + + +// It is not written with high efficiency in mind, so is probably +// not suitable for real-time encoding. The aim was to keep it +// simple, general and clear. +// +// + +// Usage: +// First call rs_init_gf(poly) to set up the Galois Field parameters. +// Then call rs_init_code(size, index) to set the encoding size +// Then call rs_encode(datasize, data, out) to encode the data. +// +// These can be called repeatedly as required - but note that +// rs_init_code must be called following any rs_init_gf call. +// +// If the parameters are fixed, some of the statics below can be +// replaced with constants in the obvious way, and additionally +// malloc/free can be avoided by using static arrays of a suitable +// size. + +#include // only needed for debug (main) +#include // only needed for malloc/free + +static int gfpoly; +static int symsize; // in bits +static int logmod; // 2**symsize - 1 +static int rlen; + +static int *log = NULL, + *alog = NULL, + *rspoly = NULL; + +// rs_init_gf(poly) initialises the parameters for the Galois Field. +// The symbol size is determined from the highest bit set in poly +// This implementation will support sizes up to 30 bits (though that +// will result in very large log/antilog tables) - bit sizes of +// 8 or 4 are typical +// +// The poly is the bit pattern representing the GF characteristic +// polynomial. e.g. for ECC200 (8-bit symbols) the polynomial is +// a**8 + a**5 + a**3 + a**2 + 1, which translates to 0x12d. + +void +rs_init_gf (int poly) +{ + int m, + b, + p, + v; + + // Return storage from previous setup + if (log) + { + free (log); + free (alog); + free (rspoly); + rspoly = NULL; + } + // Find the top bit, and hence the symbol size + for (b = 1, m = 0; b <= poly; b <<= 1) + m++; + b >>= 1; + m--; + gfpoly = poly; + symsize = m; + + // Calculate the log/alog tables + logmod = (1 << m) - 1; + log = (int *) malloc (sizeof (int) * (logmod + 1)); + alog = (int *) malloc (sizeof (int) * logmod); + + for (p = 1, v = 0; v < logmod; v++) + { + alog[v] = p; + log[p] = v; + p <<= 1; + if (p & b) + p ^= poly; + } +} + +// rs_init_code(nsym, index) initialises the Reed-Solomon encoder +// nsym is the number of symbols to be generated (to be appended +// to the input data). index is usually 1 - it is the index of +// the constant in the first term (i) of the RS generator polynomial: +// (x + 2**i)*(x + 2**(i+1))*... [nsym terms] +// For ECC200, index is 1. + +void +rs_init_code (int nsym, int index) +{ + int i, + k; + + if (rspoly) + free (rspoly); + rspoly = (int *) malloc (sizeof (int) * (nsym + 1)); + + rlen = nsym; + + rspoly[0] = 1; + for (i = 1; i <= nsym; i++) + { + rspoly[i] = 1; + for (k = i - 1; k > 0; k--) + { + if (rspoly[k]) + rspoly[k] = alog[(log[rspoly[k]] + index) % logmod]; + rspoly[k] ^= rspoly[k - 1]; + } + rspoly[0] = alog[(log[rspoly[0]] + index) % logmod]; + index++; + } +} + +// Note that the following uses byte arrays, so is only suitable for +// symbol sizes up to 8 bits. Just change the data type of data and res +// to unsigned int * for larger symbols. + +void +rs_encode (int len, unsigned char *data, unsigned char *res) +{ + int i, + k, + m; + for (i = 0; i < rlen; i++) + res[i] = 0; + for (i = 0; i < len; i++) + { + m = res[rlen - 1] ^ data[i]; + for (k = rlen - 1; k > 0; k--) + { + if (m && rspoly[k]) + res[k] = res[k - 1] ^ alog[(log[m] + log[rspoly[k]]) % logmod]; + else + res[k] = res[k - 1]; + } + if (m && rspoly[0]) + res[0] = alog[(log[m] + log[rspoly[0]]) % logmod]; + else + res[0] = 0; + } +} + +#ifndef LIB +// The following tests the routines with the ISO/IEC 16022 Annexe R data +int +main (void) +{ + register int i; + + unsigned char data[9] = { 142, 164, 186 }; + unsigned char out[5]; + + rs_init_gf (0x12d); + rs_init_code (5, 1); + + rs_encode (3, data, out); + + printf ("Result of Annexe R encoding:\n"); + for (i = 4; i >= 0; i--) + printf (" %d\n", out[i]); + + return 0; +} +#endif diff --git a/reedsol.h b/reedsol.h new file mode 100644 index 0000000..487b18f --- /dev/null +++ b/reedsol.h @@ -0,0 +1,25 @@ +/** + * + * This is a simple Reed-Solomon encoder + * (C) Cliff Hones 2004 + * + * This program is free software; you can redistribute it and/or modify + * it under the terms of the GNU General Public License as published by + * the Free Software Foundation; either version 2 of the License, or + * (at your option) any later version. + * + * This program is distributed in the hope that it will be useful, + * but WITHOUT ANY WARRANTY; without even the implied warranty of + * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the + * GNU General Public License for more details. + * + * You should have received a copy of the GNU General Public License + * along with this program; if not, write to the Free Software + * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA + * + */ + +void rs_init_gf(int poly); +void rs_init_code(int nsym, int index); +void rs_encode(int len, unsigned char *data, unsigned char *res); + -- 2.39.2