ref: f42e53655e9a2a1b516326f6522fba88db59a81c
dir: /sys/src/cmd/qr.c/
#include <u.h>
#include <libc.h>
#include <ctype.h>
enum {
NUM = 1,
ANUM = 2,
BYTE = 4,
};
static uchar gpexp[255] =
{1, 2, 4, 8, 16, 32, 64, 128, 29, 58, 116, 232, 205, 135, 19, 38, 76,
152, 45, 90, 180, 117, 234, 201, 143, 3, 6, 12, 24, 48, 96, 192, 157,
39, 78, 156, 37, 74, 148, 53, 106, 212, 181, 119, 238, 193, 159, 35,
70, 140, 5, 10, 20, 40, 80, 160, 93, 186, 105, 210, 185, 111, 222,
161, 95, 190, 97, 194, 153, 47, 94, 188, 101, 202, 137, 15, 30, 60,
120, 240, 253, 231, 211, 187, 107, 214, 177, 127, 254, 225, 223, 163,
91, 182, 113, 226, 217, 175, 67, 134, 17, 34, 68, 136, 13, 26, 52,
104, 208, 189, 103, 206, 129, 31, 62, 124, 248, 237, 199, 147, 59,
118, 236, 197, 151, 51, 102, 204, 133, 23, 46, 92, 184, 109, 218,
169, 79, 158, 33, 66, 132, 21, 42, 84, 168, 77, 154, 41, 82, 164, 85,
170, 73, 146, 57, 114, 228, 213, 183, 115, 230, 209, 191, 99, 198,
145, 63, 126, 252, 229, 215, 179, 123, 246, 241, 255, 227, 219, 171,
75, 150, 49, 98, 196, 149, 55, 110, 220, 165, 87, 174, 65, 130, 25,
50, 100, 200, 141, 7, 14, 28, 56, 112, 224, 221, 167, 83, 166, 81,
162, 89, 178, 121, 242, 249, 239, 195, 155, 43, 86, 172, 69, 138, 9,
18, 36, 72, 144, 61, 122, 244, 245, 247, 243, 251, 235, 203, 139, 11,
22, 44, 88, 176, 125, 250, 233, 207, 131, 27, 54, 108, 216, 173, 71,
142};
static uchar gplog[256] =
{0, 0, 1, 25, 2, 50, 26, 198, 3, 223, 51, 238, 27, 104, 199, 75, 4, 100,
224, 14, 52, 141, 239, 129, 28, 193, 105, 248, 200, 8, 76, 113, 5,
138, 101, 47, 225, 36, 15, 33, 53, 147, 142, 218, 240, 18, 130, 69,
29, 181, 194, 125, 106, 39, 249, 185, 201, 154, 9, 120, 77, 228, 114,
166, 6, 191, 139, 98, 102, 221, 48, 253, 226, 152, 37, 179, 16, 145,
34, 136, 54, 208, 148, 206, 143, 150, 219, 189, 241, 210, 19, 92,
131, 56, 70, 64, 30, 66, 182, 163, 195, 72, 126, 110, 107, 58, 40,
84, 250, 133, 186, 61, 202, 94, 155, 159, 10, 21, 121, 43, 78, 212,
229, 172, 115, 243, 167, 87, 7, 112, 192, 247, 140, 128, 99, 13, 103,
74, 222, 237, 49, 197, 254, 24, 227, 165, 153, 119, 38, 184, 180,
124, 17, 68, 146, 217, 35, 32, 137, 46, 55, 63, 209, 91, 149, 188,
207, 205, 144, 135, 151, 178, 220, 252, 190, 97, 242, 86, 211, 171,
20, 42, 93, 158, 132, 60, 57, 83, 71, 109, 65, 162, 31, 45, 67, 216,
183, 123, 164, 118, 196, 23, 73, 236, 127, 12, 111, 246, 108, 161,
59, 82, 41, 157, 85, 170, 251, 96, 134, 177, 187, 204, 62, 90, 203,
89, 95, 176, 156, 169, 160, 81, 11, 245, 22, 235, 122, 117, 44, 215,
79, 174, 213, 233, 230, 231, 173, 232, 116, 214, 244, 234, 168, 80,
88, 175};
static uchar *polys[69];
static int cap[160];
static uchar *blocks[160];
static uchar side[40] = {
21, 25, 29, 33, 37, 41, 45, 49,
53, 57, 61, 65, 69, 73, 77, 81,
85, 89, 93, 97, 101, 105, 109, 113,
117, 121, 125, 129, 133, 137, 141, 145,
149, 153, 157, 161, 165, 169, 173, 177
};
static uchar align[40][8] = {
{0},
{6, 18, 0},
{6, 22, 0},
{6, 26, 0},
{6, 30, 0},
{6, 34, 0},
{6, 22, 38, 0},
{6, 24, 42, 0},
{6, 26, 46, 0},
{6, 28, 50, 0},
{6, 30, 54, 0},
{6, 32, 58, 0},
{6, 34, 62, 0},
{6, 26, 46, 66, 0},
{6, 26, 48, 70, 0},
{6, 26, 50, 74, 0},
{6, 30, 54, 78, 0},
{6, 30, 56, 82, 0},
{6, 30, 58, 86, 0},
{6, 34, 62, 90, 0},
{6, 28, 50, 72, 94, 0},
{6, 26, 50, 74, 98, 0},
{6, 30, 54, 78, 102, 0},
{6, 28, 54, 80, 106, 0},
{6, 32, 58, 84, 110, 0},
{6, 30, 58, 86, 114, 0},
{6, 34, 62, 90, 118, 0},
{6, 26, 50, 74, 98, 122, 0},
{6, 30, 54, 78, 102, 126, 0},
{6, 26, 52, 78, 104, 130, 0},
{6, 30, 56, 82, 108, 134, 0},
{6, 34, 60, 86, 112, 138, 0},
{6, 30, 58, 86, 114, 142, 0},
{6, 34, 62, 90, 118, 146, 0},
{6, 30, 54, 78, 102, 126, 150, 0},
{6, 24, 50, 76, 102, 128, 154, 0},
{6, 28, 54, 80, 106, 132, 158, 0},
{6, 32, 58, 84, 110, 136, 162, 0},
{6, 26, 54, 82, 110, 138, 166, 0},
{6, 30, 58, 86, 114, 142, 170, 0},
};
static void
qrinit(void)
{
uchar *p;
int in;
extern uchar qrrawpolys[];
extern uchar qrsizes[];
in = 0;
for(p = qrrawpolys; in || *p != 0; p++){
if(!in)
polys[*p] = p + 1;
in = *p;
}
memset(cap, 0, sizeof(cap));
for(p = qrsizes; p[0] != 0 || p[1] != 0; p += 4){
cap[p[0]] += p[1] * p[3];
if(blocks[p[0]] == nil)
blocks[p[0]] = p;
}
}
static void
bits(uchar *b, int *elen, int *bctr, ulong data, int n)
{
int l, bc, s;
l = *elen;
bc = *bctr;
s = b[l] << n | data;
bc += n;
while(bc > 8)
b[l++] = s >> (bc -= 8);
b[l] = s;
if(bc == 8){
l++;
bc = 0;
}
*elen = l;
*bctr = bc;
}
static int
getlbits(int version, int mode)
{
if(version <= 9)
switch(mode){
case NUM: return 10;
case ANUM: return 9;
case BYTE: return 8;
}
else if(version <= 26)
switch(mode){
case NUM: return 12;
case ANUM: return 11;
case BYTE: return 16;
}
else
switch(mode){
case NUM: return 14;
case ANUM: return 13;
case BYTE: return 16;
}
werrstr("unknown mode %#x", mode);
return -1;
}
static char
atab[] = {
['0'] 1, 2, 3, 4, 5, 6, 7, 8, 9, 10,
['A'] 11, 12, 13, 14, 15, 16, 17, 18, 19, 20, 21, 22, 23, 24, 25,
26, 27, 28, 29, 30, 31, 32, 33, 34, 35, 36,
['a'] 11, 12, 13, 14, 15, 16, 17, 18, 19, 20, 21, 22, 23, 24, 25,
26, 27, 28, 29, 30, 31, 32, 33, 34, 35, 36,
[' '] 37, ['$'] 38, ['%'] 39, ['*'] 40, ['+'] 41, ['-'] 42,
['.'] 43, ['/'] 44, [':'] 45
};
static uchar
formsel(int version, int level, int mode, uchar *data, int dlen, int *nchar)
{
int bits, lbits, i, n;
bits = 8;
switch(mode){
case NUM:
n = 0;
for(i = 0; i < dlen; i++)
if(isdigit(data[i]))
n++;
*nchar = n;
bits += 10 * (n / 3);
switch(n%3){
case 1: bits += 4; break;
case 2: bits += 7; break;
}
break;
case ANUM:
n = 0;
for(i = 0; i < dlen; i++)
if(atab[data[i]] != 0)
n++;
*nchar = n;
bits += 11 * (n >> 1) + 6 * (n & 1);
break;
case BYTE:
bits += 8 * dlen;
*nchar = dlen;
break;
}
if(version == 0){
SET(lbits);
for(i = 0; i < 40; i++){
if(i == 0 || i == 10 || i == 27){
lbits = getlbits(i + 1, mode);
if(lbits < 0)
return -1;
}
if(cap[i << 2 | level] >= (bits + lbits + 7 >> 3))
return i << 2 | level;
}
}else{
lbits = getlbits(version, mode);
if(lbits < 0)
return -1;
if(cap[version - 1 << 2 | level] >= (bits + lbits + 7 >> 3))
return version - 1 << 2 | level;
}
werrstr("too many bits");
return -1;
}
static uchar *
encode(uchar verlev, uchar *data, int dlen, int mode, int nchar)
{
uchar *b;
int bc, n, c, nd;
int acc;
n = 0;
c = cap[verlev];
b = malloc(c);
if(b == nil)
return nil;
bits(b, &n, &bc, mode, 4);
bits(b, &n, &bc, nchar, getlbits((verlev >> 2) + 1, mode));
switch(mode){
case NUM:
nd = 0;
acc = 0;
for(; dlen-- != 0; data++)
if(isdigit(*data)){
acc = acc * 10 + *data - '0';
if(++nd == 3){
nd = 0;
bits(b, &n, &bc, acc, 10);
acc = 0;
}
}
if(nd == 1)
bits(b, &n, &bc, acc, 4);
else if(nd == 2)
bits(b, &n, &bc, acc, 7);
break;
case ANUM:
nd = 0;
acc = 0;
for(; dlen-- != 0; data++)
if(atab[*data] != 0){
acc = acc * 45 + atab[*data] - 1;
if(++nd == 2){
nd = 0;
bits(b, &n, &bc, acc, 11);
acc = 0;
}
}
if(nd == 1)
bits(b, &n, &bc, acc, 6);
break;
case BYTE:
while(dlen-- != 0)
bits(b, &n, &bc, *data++, 8);
break;
default:
werrstr("unknown mode %#x", mode);
return nil;
}
bits(b, &n, &bc, 0, 4);
if(bc != 0)
b[n++] <<= 8 - bc;
while(n < c){
b[n++] = 0xec;
if(n == c)
break;
b[n++] = 0x11;
}
return b;
}
/* all stored highest coefficient first
poly stored as log and highest coefficient implicit 1 */
static int
ecc(uchar *data, int dl, uchar *poly, uchar *err, int el, int str)
{
uchar *q;
uchar *dp;
uchar l;
int i, x;
q = malloc(el);
if(q == nil)
return -1;
for(i = 0; i < el; i++){
q[i] = gpexp[poly[i]];
err[i * str] = 0;
}
for(dp = data + dl - 1; dp != data - 1; dp--){
if(*dp != 0){
l = gplog[*dp];
for(i = 0; i < el; i++){
if(q[i] != 0){
x = gplog[q[i]] + l;
if(x >= 255)
x -= 255;
err[i * str] ^= gpexp[x];
}
}
}
l = q[0];
if(l != 0){
l = gplog[l];
for(i = 0; i < el; i++){
x = l + poly[i];
if(x >= 255)
x -= 255;
q[i] = (i == el-1 ? 0 : q[i+1]) ^ gpexp[x];
}
}else{
for(i = 0; i < el - 1; i++)
q[i] = q[i+1];
q[el - 1] = 0;
}
}
free(q);
return 0;
}
static uchar *
codewords(uchar verlev, uchar *data, int *ncp)
{
uchar *bp, *p, *dp, *r, *rp;
uchar *ep;
int ne, i, j, el, nc, nb, ncol;
bp = blocks[verlev];
el = bp[2] - bp[3]; /* guaranteed constant */
ncol = 0;
for(p = bp, ne = 0, nc = 0, nb = 0; p[0] == verlev; p += 4){
nb += p[1];
ne += p[1] * el;
nc += p[1] * p[2];
ncol = p[3];
}
r = malloc(nc);
if(r == nil)
return nil;
for(p = bp, dp = data, ep = r + nc - ne; p[0] == verlev; p += 4)
for(j = 0; j < p[1]; j++){
if(ecc(dp, p[3], polys[el], ep, el, nb) < 0){
free(r);
return nil;
}
dp += p[3];
ep++;
}
for(i = 0, rp = r; i < ncol; i++){
dp = data + i;
for(p = bp; p[0] == verlev; p += 4){
for(j = 0; j < p[1]; j++){
if(p[3] > i)
*rp++ = *dp;
dp += p[3];
}
}
}
*ncp = nc;
return r;
}
#define max(i,j) ((i)>(j)?(i):(j))
uchar *
basepat(int verlev)
{
int s, i, j, d;
uchar *pat, *p, *ap, *aq;
s = side[verlev >> 2];
pat = malloc((s + 8) * (s + 8));
if(pat == nil)
return nil;
p = pat;
for(j = -4; j < s + 4; j++)
for(i = -4; i < s + 4; i++){
if(i < 0 || j < 0 || i >= s || j >= s)
*p++ = 0xff;
else if(i < 8 && j < 8 || i >= s - 8 && j < 8 || i < 8 && j >= s - 8){
d = max(abs(i >= 8 ? i - s + 4 : i-3), abs(j >= 8 ? j - s + 4 : j-3));
*p++ = d == 2 || d == 4 ? 0xff : 0;
}else if(i == 6 || j == 6)
*p++ = (i + j & 1) != 0 ? 0xff : 0;
else if(i <= 8 && j <= 8 || i <= 8 && j >= s - 8 || i >= s - 8 && j <= 8)
*p++ = 0xd0;
else if(verlev >= 24 && (j >= s - 11 && i < 6 || i >= s - 11 && j < 6))
*p++ = 0xc0;
else
*p++ = 0x80;
}
for(ap = align[verlev >> 2]; *ap != 0; ap++)
for(aq = align[verlev >> 2]; *aq != 0; aq++){
if(*ap == 6 && *aq == 6 || *ap >= s - 7 && *aq == 6 || *ap == 6 && *aq >= s - 7)
continue;
for(i = *ap - 2; i <= *ap + 2; i++)
for(j = *aq - 2; j <= *aq + 2; j++)
pat[i * (s + 8) + j + 4 + (s + 8) * 4] = max(abs(i - *ap), abs(j - *aq)) == 1 ? 0xff : 0;
}
return pat;
}
static void
fill(uchar verlev, uchar *p, uchar *d, int nc)
{
int s, x, y, i, up;
uchar *dp, db;
s = side[verlev >> 2] + 8;
x = s - 5;
y = s - 5;
up = 1;
SET(db);
for(dp = d, i = 0;;){
if(i == 0){
if(dp - d == nc)
db = 0;
else
db = *dp++;
}
i = i + 1 & 7;
while(p[y * s + x] != 0x80){
if(up){
if((x & 1 ^ (x < 10)) == 0)
x--;
else if(y >= 4){
x++;
y--;
}else{
x--;
up = 0;
if(x == 10)
x--;
}
}else{
if((x & 1 ^ (x < 10)) == 0)
x--;
else if(y < s - 4){
x++;
y++;
}else{
x--;
up = 1;
if(x == 10)
x--;
}
}
if(x < 0)
return;
}
p[y * s + x] = ~((char)db >> 7) ^ 0x0f;
db <<= 1;
}
}
static void
mask(uchar verlev, uchar *p, int m)
{
uchar *q;
int s, i, j;
s = side[verlev >> 2];
for(i = -4, q = p; i < s + 4; i++)
for(j = -4; j < s + 4; j++, q++)
if(((*q ^ *q >> 4) & 15) == 15)
switch(m){
case 0: *q ^= (char)((i+j+1) << 7) >> 7; break;
case 1: *q ^= (char)((i+1) << 7) >> 7; break;
case 2: *q ^= (char)(j % 3 - 1) >> 7; break;
case 3: *q ^= (char)((i+j) % 3 - 1) >> 7; break;
case 4: *q ^= (char)(((i/2)+(j/3)+1) << 7) >> 7; break;
case 5: *q ^= (char)((i*j%2)+(i*j%3) - 1) >> 7; break;
case 6: *q ^= (char)((i*j+(i*j%3)+1) << 7) >> 7; break;
case 7: *q ^= (char)((i+j+(i*j%3)+1) << 7) >> 7; break;
}
}
static int
evaluate(uchar verlev, uchar *p)
{
int r, i, j, l, s, sc, cnt;
uchar q, sh;
uchar *pp;
enum {
N1 = 3,
N2 = 3,
N3 = 40,
N4 = 10,
};
s = side[verlev >> 2];
sc = 0;
cnt = 0;
for(i = 0; i < s; i++){
r = 0;
l = -1;
sh = 0;
for(j = 0; j < s; j++){
q = p[i * (s + 8) + j + 4 + (s + 8) * 4] >= 0x80;
cnt += q;
sh = sh << 1 | l;
if(q != l){
if(r >= 5)
sc += N1 + r;
l = q;
r = 0;
}
if((sh & 0x7f) == 0x5d)
sc += N3;
}
if(r >= 5)
sc += N1 * r;
}
sc = abs(cnt - s * s / 2) / (s * s / 20) * N4;
for(j = 0; j < s; j++){
r = 0;
l = -1;
sh = 0;
for(i = 0; i < s; i++){
q = p[i * (s + 8) + j + 4 + (s + 8) * 4];
sh = sh << 1 | l;
if(q != l){
if(r >= 5)
sc += N1 + r;
l = q;
r = 0;
}
if((sh & 0x7f) == 0x5d)
sc += N3;
}
if(r >= 5)
sc += N1 * r;
}
/* approximation */
for(j = 1; j < s; j++)
for(i = 1; i < s; i++){
pp = p + i * (s + 8) + j + 4 + (s + 8) * 4;
if(pp[0] == pp[-1] && pp[0] == pp[-(s+8)] && pp[0] == pp[-1-(s+8)])
sc += N2;
}
return sc;
}
static void
format(uchar verlev, uchar *p, int m)
{
static ushort format[] =
{21522, 20773, 24188, 23371, 17913, 16590, 20375, 19104, 30660,
29427, 32170, 30877, 26159, 25368, 27713, 26998, 5769, 5054, 7399,
6608, 1890, 597, 3340, 2107, 13663, 12392, 16177, 14854, 9396, 8579,
11994, 11245};
int s, i;
ushort f;
uchar c;
s = side[verlev >> 2];
f = ~format[verlev << 3 & 0x18 ^ 8 | m];
for(i = 0; i < 15; i++){
c = (char)(f << 7) >> 7;
if(i < 8){
p[(i + (i >= 6)) * (s + 8) + 8 + 4 + (s + 8) * 4] = c;
p[12 * (s + 8) + (s + 3 - i)] = c;
}else{
p[(s - 15 + i) * (s + 8) + 8 + 4 + (s + 8) * 4] = c;
p[12 * (s + 8) + (18 - i + (i == 8))] = c;
}
f >>= 1;
}
p[(s - 8) * (s + 8) + 8 + 4 + (s + 8) * 4] = 0;
}
static void
version(uchar verlev, uchar *p)
{
int s, i, f, q;
uchar c;
static int version[] = {
0x07C94, 0x085BC, 0x09A99, 0x0A4D3, 0x0BBF6, 0x0C762, 0x0D847,
0x0E60D, 0x0F928, 0x10B78, 0x1145D, 0x12A17, 0x13532, 0x149A6,
0x15683, 0x168C9, 0x177EC, 0x18EC4, 0x191E1, 0x1AFAB, 0x1B08E,
0x1CC1A, 0x1D33F, 0x1ED75, 0x1F250, 0x209D5, 0x216F0, 0x228BA,
0x2379F, 0x24B0B, 0x2542E, 0x26A64, 0x27541, 0x28C69
};
if(verlev < 24)
return;
s = side[verlev >> 2] + 8;
f = ~version[(verlev >> 2) - 6];
for(i = 0; i < 18; i++){
c = (char)(f << 7) >> 7;
f >>= 1;
q = (s - 15 + i % 3) * s + (4 + i / 3);
p[q] = c;
p[(q * s) % (s * s - 1)] = c;
}
}
static void
finalize(uchar verlev, uchar *p)
{
int s;
s = side[verlev >> 2] + 8;
s *= s;
while(s--)
*((char *)p++) >>= 4;
}
uchar *
qrcode(int ver, int level, int mode, uchar *data, int dlen, int *sidep)
{
int s, nc, m, mv, mbest, mval, nchar;
uchar *d, *w, *b;
uchar verlev;
qrinit();
verlev = formsel(ver, level, mode, data, dlen, &nchar);
if(verlev == 0xff)
return nil;
s = side[verlev >> 2];
d = encode(verlev, data, dlen, mode, nchar);
if(d == nil)
return nil;
w = codewords(verlev, d, &nc);
free(d);
if(w == nil)
return nil;
b = basepat(verlev);
if(b == nil){
free(w);
return nil;
}
fill(verlev, b, w, nc);
free(w);
SET(mbest); SET(mval);
for(m = 0; m < 8; m++){
mask(verlev, b, m);
mv = evaluate(verlev, b);
if(m == 0 || mv < mval){
mbest = m;
mval = mv;
}
if(m != 7 || mbest != m)
mask(verlev, b, m);
}
if(mbest != 7)
mask(verlev, b, mbest);
format(verlev, b, mbest);
version(verlev, b);
finalize(verlev, b);
*sidep = s + 8;
return b;
}
void
usage(void)
{
fprint(2, "usage: %s [-LMQHn] [-v ver]\n", argv0);
exits("usage");
}
void
main(int argc, char **argv)
{
uchar buf[8192];
int rc;
int ver, lev, mode, s;
char *c;
uchar *b;
ver = 0;
lev = 1;
mode = BYTE;
ARGBEGIN {
case 'L': lev = 0; break;
case 'M': lev = 1; break;
case 'Q': lev = 2; break;
case 'H': lev = 3; break;
case 'v':
ver = strtol(EARGF(usage()), &c, 0);
if(*c != 0 || ver < 0 || ver > 40)
usage();
break;
case 'n': mode = NUM; break;
case 'a': mode = ANUM; break;
default: usage();
} ARGEND;
if(argc != 0)
usage();
rc = readn(0, buf, sizeof(buf));
if(rc < 0)
sysfatal("read: %r");
b = qrcode(ver, lev, mode, buf, rc, &s);
if(b == nil)
sysfatal("%r");
print("%11s %11d %11d %11d %11d ", "k8", 0, 0, s, s);
write(1, b, s * s);
}
uchar qrrawpolys[] = {
7, 87, 229, 146, 149, 238, 102, 21,
0, 10, 251, 67, 46, 61, 118, 70,
64, 94, 32, 45, 0, 13, 74, 152,
176, 100, 86, 100, 106, 104, 130, 218,
206, 140, 78, 0, 15, 8, 183, 61,
91, 202, 37, 51, 58, 58, 237, 140,
124, 5, 99, 105, 0, 16, 120, 104,
107, 109, 102, 161, 76, 3, 91, 191,
147, 169, 182, 194, 225, 120, 0, 17,
43, 139, 206, 78, 43, 239, 123, 206,
214, 147, 24, 99, 150, 39, 243, 163,
136, 0, 18, 215, 234, 158, 94, 184,
97, 118, 170, 79, 187, 152, 148, 252,
179, 5, 98, 96, 153, 0, 20, 17,
60, 79, 50, 61, 163, 26, 187, 202,
180, 221, 225, 83, 239, 156, 164, 212,
212, 188, 190, 0, 22, 210, 171, 247,
242, 93, 230, 14, 109, 221, 53, 200,
74, 8, 172, 98, 80, 219, 134, 160,
105, 165, 231, 0, 24, 229, 121, 135,
48, 211, 117, 251, 126, 159, 180, 169,
152, 192, 226, 228, 218, 111, 117, 232,
87, 96, 227, 21, 0, 26, 173, 125,
158, 2, 103, 182, 118, 17, 145, 201,
111, 28, 165, 53, 161, 21, 245, 142,
13, 102, 48, 227, 153, 145, 218, 70,
0, 28, 168, 223, 200, 104, 224, 234,
108, 180, 110, 190, 195, 147, 205, 27,
232, 201, 21, 43, 245, 87, 42, 195,
212, 119, 242, 37, 9, 123, 0, 30,
41, 173, 145, 152, 216, 31, 179, 182,
50, 48, 110, 86, 239, 96, 222, 125,
42, 173, 226, 193, 224, 130, 156, 37,
251, 216, 238, 40, 192, 180, 0, 32,
10, 6, 106, 190, 249, 167, 4, 67,
209, 138, 138, 32, 242, 123, 89, 27,
120, 185, 80, 156, 38, 69, 171, 60,
28, 222, 80, 52, 254, 185, 220, 241,
0, 34, 111, 77, 146, 94, 26, 21,
108, 19, 105, 94, 113, 193, 86, 140,
163, 125, 58, 158, 229, 239, 218, 103,
56, 70, 114, 61, 183, 129, 167, 13,
98, 62, 129, 51, 0, 36, 200, 183,
98, 16, 172, 31, 246, 234, 60, 152,
115, 167, 152, 113, 248, 238, 107, 18,
63, 218, 37, 87, 210, 105, 177, 120,
74, 121, 196, 117, 251, 113, 233, 30,
120, 0, 40, 59, 116, 79, 161, 252,
98, 128, 205, 128, 161, 247, 57, 163,
56, 235, 106, 53, 26, 187, 174, 226,
104, 170, 7, 175, 35, 181, 114, 88,
41, 47, 163, 125, 134, 72, 20, 232,
53, 35, 15, 0, 42, 250, 103, 221,
230, 25, 18, 137, 231, 3, 58, 242,
221, 191, 110, 84, 230, 8, 188, 106,
96, 147, 15, 131, 139, 34, 101, 223,
39, 101, 213, 199, 237, 254, 201, 123,
171, 162, 194, 117, 50, 96, 0, 44,
190, 7, 61, 121, 71, 246, 69, 55,
168, 188, 89, 243, 191, 25, 72, 123,
9, 145, 14, 247, 238, 44, 78, 143,
62, 224, 126, 118, 114, 68, 163, 52,
194, 217, 147, 204, 169, 37, 130, 113,
102, 73, 181, 0, 46, 112, 94, 88,
112, 253, 224, 202, 115, 187, 99, 89,
5, 54, 113, 129, 44, 58, 16, 135,
216, 169, 211, 36, 4, 96, 60, 241,
73, 104, 234, 8, 249, 245, 119, 174,
52, 25, 157, 224, 43, 202, 223, 19,
82, 15, 0, 48, 228, 25, 196, 130,
211, 146, 60, 24, 251, 90, 39, 102,
240, 61, 178, 63, 46, 123, 115, 18,
221, 111, 135, 160, 182, 205, 107, 206,
95, 150, 120, 184, 91, 21, 247, 156,
140, 238, 191, 11, 94, 227, 84, 50,
163, 39, 34, 108, 0, 50, 232, 125,
157, 161, 164, 9, 118, 46, 209, 99,
203, 193, 35, 3, 209, 111, 195, 242,
203, 225, 46, 13, 32, 160, 126, 209,
130, 160, 242, 215, 242, 75, 77, 42,
189, 32, 113, 65, 124, 69, 228, 114,
235, 175, 124, 170, 215, 232, 133, 205,
0, 52, 116, 50, 86, 186, 50, 220,
251, 89, 192, 46, 86, 127, 124, 19,
184, 233, 151, 215, 22, 14, 59, 145,
37, 242, 203, 134, 254, 89, 190, 94,
59, 65, 124, 113, 100, 233, 235, 121,
22, 76, 86, 97, 39, 242, 200, 220,
101, 33, 239, 254, 116, 51, 0, 54,
183, 26, 201, 87, 210, 221, 113, 21,
46, 65, 45, 50, 238, 184, 249, 225,
102, 58, 209, 218, 109, 165, 26, 95,
184, 192, 52, 245, 35, 254, 238, 175,
172, 79, 123, 25, 122, 43, 120, 108,
215, 80, 128, 201, 235, 8, 153, 59,
101, 31, 198, 76, 31, 156, 0, 56,
106, 120, 107, 157, 164, 216, 112, 116,
2, 91, 248, 163, 36, 201, 202, 229,
6, 144, 254, 155, 135, 208, 170, 209,
12, 139, 127, 142, 182, 249, 177, 174,
190, 28, 10, 85, 239, 184, 101, 124,
152, 206, 96, 23, 163, 61, 27, 196,
247, 151, 154, 202, 207, 20, 61, 10,
0, 58, 82, 116, 26, 247, 66, 27,
62, 107, 252, 182, 200, 185, 235, 55,
251, 242, 210, 144, 154, 237, 176, 141,
192, 248, 152, 249, 206, 85, 253, 142,
65, 165, 125, 23, 24, 30, 122, 240,
214, 6, 129, 218, 29, 145, 127, 134,
206, 245, 117, 29, 41, 63, 159, 142,
233, 125, 148, 123, 0, 60, 107, 140,
26, 12, 9, 141, 243, 197, 226, 197,
219, 45, 211, 101, 219, 120, 28, 181,
127, 6, 100, 247, 2, 205, 198, 57,
115, 219, 101, 109, 160, 82, 37, 38,
238, 49, 160, 209, 121, 86, 11, 124,
30, 181, 84, 25, 194, 87, 65, 102,
190, 220, 70, 27, 209, 16, 89, 7,
33, 240, 0, 62, 65, 202, 113, 98,
71, 223, 248, 118, 214, 94, 122, 37,
23, 2, 228, 58, 121, 7, 105, 135,
78, 243, 118, 70, 76, 223, 89, 72,
50, 70, 111, 194, 17, 212, 126, 181,
35, 221, 117, 235, 11, 229, 149, 147,
123, 213, 40, 115, 6, 200, 100, 26,
246, 182, 218, 127, 215, 36, 186, 110,
106, 0, 64, 45, 51, 175, 9, 7,
158, 159, 49, 68, 119, 92, 123, 177,
204, 187, 254, 200, 78, 141, 149, 119,
26, 127, 53, 160, 93, 199, 212, 29,
24, 145, 156, 208, 150, 218, 209, 4,
216, 91, 47, 184, 146, 47, 140, 195,
195, 125, 242, 238, 63, 99, 108, 140,
230, 242, 31, 204, 11, 178, 243, 217,
156, 213, 231, 0, 66, 5, 118, 222,
180, 136, 136, 162, 51, 46, 117, 13,
215, 81, 17, 139, 247, 197, 171, 95,
173, 65, 137, 178, 68, 111, 95, 101,
41, 72, 214, 169, 197, 95, 7, 44,
154, 77, 111, 236, 40, 121, 143, 63,
87, 80, 253, 240, 126, 217, 77, 34,
232, 106, 50, 168, 82, 76, 146, 67,
106, 171, 25, 132, 93, 45, 105, 0,
68, 247, 159, 223, 33, 224, 93, 77,
70, 90, 160, 32, 254, 43, 150, 84,
101, 190, 205, 133, 52, 60, 202, 165,
220, 203, 151, 93, 84, 15, 84, 253,
173, 160, 89, 227, 52, 199, 97, 95,
231, 52, 177, 41, 125, 137, 241, 166,
225, 118, 2, 54, 32, 82, 215, 175,
198, 43, 238, 235, 27, 101, 184, 127,
3, 5, 8, 163, 238, 0, 0
};
/* (version - 1) * 4 + level, number of blocks, number of bytes in block, number of data bytes */
uchar qrsizes[] = {
0, 1, 26, 19,
1, 1, 26, 16,
2, 1, 26, 13,
3, 1, 26, 9,
4, 1, 44, 34,
5, 1, 44, 28,
6, 1, 44, 22,
7, 1, 44, 16,
8, 1, 70, 55,
9, 1, 70, 44,
10, 2, 35, 17,
11, 2, 35, 13,
12, 1, 100, 80,
13, 2, 50, 32,
14, 2, 50, 24,
15, 4, 25, 9,
16, 1, 134, 108,
17, 2, 67, 43,
18, 2, 33, 15,
18, 2, 34, 16,
19, 2, 33, 11,
19, 2, 34, 12,
20, 2, 86, 68,
21, 4, 43, 27,
22, 4, 43, 19,
23, 4, 43, 15,
24, 2, 98, 78,
25, 4, 49, 31,
26, 2, 32, 14,
26, 4, 33, 15,
27, 4, 39, 13,
27, 1, 40, 14,
28, 2, 121, 97,
29, 2, 60, 38,
29, 2, 61, 39,
30, 4, 40, 18,
30, 2, 41, 19,
31, 4, 40, 14,
31, 2, 41, 15,
32, 2, 146, 116,
33, 3, 58, 36,
33, 2, 59, 37,
34, 4, 36, 16,
34, 4, 37, 17,
35, 4, 36, 12,
35, 4, 37, 13,
36, 2, 86, 68,
36, 2, 87, 69,
37, 4, 69, 43,
37, 1, 70, 44,
38, 6, 43, 19,
38, 2, 44, 20,
39, 6, 43, 15,
39, 2, 44, 16,
40, 4, 101, 81,
41, 1, 80, 50,
41, 4, 81, 51,
42, 4, 50, 22,
42, 4, 51, 23,
43, 3, 36, 12,
43, 8, 37, 13,
44, 2, 116, 92,
44, 2, 117, 93,
45, 6, 58, 36,
45, 2, 59, 37,
46, 4, 46, 20,
46, 6, 47, 21,
47, 7, 42, 14,
47, 4, 43, 15,
48, 4, 133, 107,
49, 8, 59, 37,
49, 1, 60, 38,
50, 8, 44, 20,
50, 4, 45, 21,
51, 12, 33, 11,
51, 4, 34, 12,
52, 3, 145, 115,
52, 1, 146, 116,
53, 4, 64, 40,
53, 5, 65, 41,
54, 11, 36, 16,
54, 5, 37, 17,
55, 11, 36, 12,
55, 5, 37, 13,
56, 5, 109, 87,
56, 1, 110, 88,
57, 5, 65, 41,
57, 5, 66, 42,
58, 5, 54, 24,
58, 7, 55, 25,
59, 11, 36, 12,
59, 7, 37, 13,
60, 5, 122, 98,
60, 1, 123, 99,
61, 7, 73, 45,
61, 3, 74, 46,
62, 15, 43, 19,
62, 2, 44, 20,
63, 3, 45, 15,
63, 13, 46, 16,
64, 1, 135, 107,
64, 5, 136, 108,
65, 10, 74, 46,
65, 1, 75, 47,
66, 1, 50, 22,
66, 15, 51, 23,
67, 2, 42, 14,
67, 17, 43, 15,
68, 5, 150, 120,
68, 1, 151, 121,
69, 9, 69, 43,
69, 4, 70, 44,
70, 17, 50, 22,
70, 1, 51, 23,
71, 2, 42, 14,
71, 19, 43, 15,
72, 3, 141, 113,
72, 4, 142, 114,
73, 3, 70, 44,
73, 11, 71, 45,
74, 17, 47, 21,
74, 4, 48, 22,
75, 9, 39, 13,
75, 16, 40, 14,
76, 3, 135, 107,
76, 5, 136, 108,
77, 3, 67, 41,
77, 13, 68, 42,
78, 15, 54, 24,
78, 5, 55, 25,
79, 15, 43, 15,
79, 10, 44, 16,
80, 4, 144, 116,
80, 4, 145, 117,
81, 17, 68, 42,
82, 17, 50, 22,
82, 6, 51, 23,
83, 19, 46, 16,
83, 6, 47, 17,
84, 2, 139, 111,
84, 7, 140, 112,
85, 17, 74, 46,
86, 7, 54, 24,
86, 16, 55, 25,
87, 34, 37, 13,
88, 4, 151, 121,
88, 5, 152, 122,
89, 4, 75, 47,
89, 14, 76, 48,
90, 11, 54, 24,
90, 14, 55, 25,
91, 16, 45, 15,
91, 14, 46, 16,
92, 6, 147, 117,
92, 4, 148, 118,
93, 6, 73, 45,
93, 14, 74, 46,
94, 11, 54, 24,
94, 16, 55, 25,
95, 30, 46, 16,
95, 2, 47, 17,
96, 8, 132, 106,
96, 4, 133, 107,
97, 8, 75, 47,
97, 13, 76, 48,
98, 7, 54, 24,
98, 22, 55, 25,
99, 22, 45, 15,
99, 13, 46, 16,
100, 10, 142, 114,
100, 2, 143, 115,
101, 19, 74, 46,
101, 4, 75, 47,
102, 28, 50, 22,
102, 6, 51, 23,
103, 33, 46, 16,
103, 4, 47, 17,
104, 8, 152, 122,
104, 4, 153, 123,
105, 22, 73, 45,
105, 3, 74, 46,
106, 8, 53, 23,
106, 26, 54, 24,
107, 12, 45, 15,
107, 28, 46, 16,
108, 3, 147, 117,
108, 10, 148, 118,
109, 3, 73, 45,
109, 23, 74, 46,
110, 4, 54, 24,
110, 31, 55, 25,
111, 11, 45, 15,
111, 31, 46, 16,
112, 7, 146, 116,
112, 7, 147, 117,
113, 21, 73, 45,
113, 7, 74, 46,
114, 1, 53, 23,
114, 37, 54, 24,
115, 19, 45, 15,
115, 26, 46, 16,
116, 5, 145, 115,
116, 10, 146, 116,
117, 19, 75, 47,
117, 10, 76, 48,
118, 15, 54, 24,
118, 25, 55, 25,
119, 23, 45, 15,
119, 25, 46, 16,
120, 13, 145, 115,
120, 3, 146, 116,
121, 2, 74, 46,
121, 29, 75, 47,
122, 42, 54, 24,
122, 1, 55, 25,
123, 23, 45, 15,
123, 28, 46, 16,
124, 17, 145, 115,
125, 10, 74, 46,
125, 23, 75, 47,
126, 10, 54, 24,
126, 35, 55, 25,
127, 19, 45, 15,
127, 35, 46, 16,
128, 17, 145, 115,
128, 1, 146, 116,
129, 14, 74, 46,
129, 21, 75, 47,
130, 29, 54, 24,
130, 19, 55, 25,
131, 11, 45, 15,
131, 46, 46, 16,
132, 13, 145, 115,
132, 6, 146, 116,
133, 14, 74, 46,
133, 23, 75, 47,
134, 44, 54, 24,
134, 7, 55, 25,
135, 59, 46, 16,
135, 1, 47, 17,
136, 12, 151, 121,
136, 7, 152, 122,
137, 12, 75, 47,
137, 26, 76, 48,
138, 39, 54, 24,
138, 14, 55, 25,
139, 22, 45, 15,
139, 41, 46, 16,
140, 6, 151, 121,
140, 14, 152, 122,
141, 6, 75, 47,
141, 34, 76, 48,
142, 46, 54, 24,
142, 10, 55, 25,
143, 2, 45, 15,
143, 64, 46, 16,
144, 17, 152, 122,
144, 4, 153, 123,
145, 29, 74, 46,
145, 14, 75, 47,
146, 49, 54, 24,
146, 10, 55, 25,
147, 24, 45, 15,
147, 46, 46, 16,
148, 4, 152, 122,
148, 18, 153, 123,
149, 13, 74, 46,
149, 32, 75, 47,
150, 48, 54, 24,
150, 14, 55, 25,
151, 42, 45, 15,
151, 32, 46, 16,
152, 20, 147, 117,
152, 4, 148, 118,
153, 40, 75, 47,
153, 7, 76, 48,
154, 43, 54, 24,
154, 22, 55, 25,
155, 10, 45, 15,
155, 67, 46, 16,
156, 19, 148, 118,
156, 6, 149, 119,
157, 18, 75, 47,
157, 31, 76, 48,
158, 34, 54, 24,
158, 34, 55, 25,
159, 20, 45, 15,
159, 61, 46, 16,
0, 0, 0, 0,
};