824 lines
20 KiB
Diff
824 lines
20 KiB
Diff
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diff -c -r xpdf-3.02pl1.orig/xpdf/Stream.cc xpdf-3.02/xpdf/Stream.cc
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*** xpdf-3.02pl1.orig/xpdf/Stream.cc Thu Oct 25 15:47:38 2007
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--- xpdf-3.02/xpdf/Stream.cc Thu Oct 25 15:48:19 2007
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***************
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*** 1243,1265 ****
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columns = columnsA;
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if (columns < 1) {
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columns = 1;
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! }
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! if (columns + 4 <= 0) {
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! columns = INT_MAX - 4;
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}
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rows = rowsA;
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endOfBlock = endOfBlockA;
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black = blackA;
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! refLine = (short *)gmallocn(columns + 3, sizeof(short));
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! codingLine = (short *)gmallocn(columns + 2, sizeof(short));
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eof = gFalse;
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row = 0;
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nextLine2D = encoding < 0;
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inputBits = 0;
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! codingLine[0] = 0;
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! codingLine[1] = refLine[2] = columns;
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! a0 = 1;
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buf = EOF;
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}
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--- 1243,1268 ----
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columns = columnsA;
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if (columns < 1) {
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columns = 1;
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! } else if (columns > INT_MAX - 2) {
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! columns = INT_MAX - 2;
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}
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rows = rowsA;
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endOfBlock = endOfBlockA;
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black = blackA;
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! // 0 <= codingLine[0] < codingLine[1] < ... < codingLine[n] = columns
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! // ---> max codingLine size = columns + 1
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! // refLine has one extra guard entry at the end
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! // ---> max refLine size = columns + 2
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! codingLine = (int *)gmallocn(columns + 1, sizeof(int));
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! refLine = (int *)gmallocn(columns + 2, sizeof(int));
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eof = gFalse;
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row = 0;
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nextLine2D = encoding < 0;
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inputBits = 0;
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! codingLine[0] = columns;
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! a0i = 0;
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! outputBits = 0;
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buf = EOF;
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}
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***************
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*** 1278,1286 ****
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row = 0;
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nextLine2D = encoding < 0;
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inputBits = 0;
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! codingLine[0] = 0;
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! codingLine[1] = columns;
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! a0 = 1;
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buf = EOF;
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// skip any initial zero bits and end-of-line marker, and get the 2D
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--- 1281,1289 ----
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row = 0;
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nextLine2D = encoding < 0;
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inputBits = 0;
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! codingLine[0] = columns;
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! a0i = 0;
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! outputBits = 0;
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buf = EOF;
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// skip any initial zero bits and end-of-line marker, and get the 2D
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***************
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*** 1297,1507 ****
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}
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}
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int CCITTFaxStream::lookChar() {
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short code1, code2, code3;
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! int a0New;
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! GBool err, gotEOL;
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! int ret;
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! int bits, i;
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! // if at eof just return EOF
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! if (eof && codingLine[a0] >= columns) {
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! return EOF;
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}
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// read the next row
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! err = gFalse;
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! if (codingLine[a0] >= columns) {
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// 2-D encoding
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if (nextLine2D) {
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- // state:
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- // a0New = current position in coding line (0 <= a0New <= columns)
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- // codingLine[a0] = last change in coding line
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- // (black-to-white if a0 is even,
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- // white-to-black if a0 is odd)
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- // refLine[b1] = next change in reference line of opposite color
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- // to a0
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- // invariants:
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- // 0 <= codingLine[a0] <= a0New
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- // <= refLine[b1] <= refLine[b1+1] <= columns
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- // 0 <= a0 <= columns+1
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- // refLine[0] = 0
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- // refLine[n] = refLine[n+1] = columns
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- // -- for some 1 <= n <= columns+1
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- // end condition:
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- // 0 = codingLine[0] <= codingLine[1] < codingLine[2] < ...
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- // < codingLine[n-1] < codingLine[n] = columns
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- // -- where 1 <= n <= columns+1
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for (i = 0; codingLine[i] < columns; ++i) {
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refLine[i] = codingLine[i];
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}
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! refLine[i] = refLine[i + 1] = columns;
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! b1 = 1;
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! a0New = codingLine[a0 = 0] = 0;
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! do {
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code1 = getTwoDimCode();
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switch (code1) {
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case twoDimPass:
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! if (refLine[b1] < columns) {
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! a0New = refLine[b1 + 1];
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! b1 += 2;
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}
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break;
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case twoDimHoriz:
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! if ((a0 & 1) == 0) {
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! code1 = code2 = 0;
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do {
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! code1 += code3 = getWhiteCode();
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} while (code3 >= 64);
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do {
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! code2 += code3 = getBlackCode();
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} while (code3 >= 64);
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} else {
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- code1 = code2 = 0;
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do {
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! code1 += code3 = getBlackCode();
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} while (code3 >= 64);
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do {
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! code2 += code3 = getWhiteCode();
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} while (code3 >= 64);
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}
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! if (code1 > 0 || code2 > 0) {
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! if (a0New + code1 <= columns) {
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! codingLine[a0 + 1] = a0New + code1;
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! } else {
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! codingLine[a0 + 1] = columns;
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! }
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! ++a0;
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! if (codingLine[a0] + code2 <= columns) {
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! codingLine[a0 + 1] = codingLine[a0] + code2;
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! } else {
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! codingLine[a0 + 1] = columns;
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! }
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! ++a0;
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! a0New = codingLine[a0];
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! while (refLine[b1] <= a0New && refLine[b1] < columns) {
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! b1 += 2;
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}
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}
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break;
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! case twoDimVert0:
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! if (refLine[b1] < columns) {
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! a0New = codingLine[++a0] = refLine[b1];
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! ++b1;
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! while (refLine[b1] <= a0New && refLine[b1] < columns) {
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! b1 += 2;
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}
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- } else {
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- a0New = codingLine[++a0] = columns;
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}
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break;
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case twoDimVertR1:
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! if (refLine[b1] + 1 < columns) {
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! a0New = codingLine[++a0] = refLine[b1] + 1;
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! ++b1;
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! while (refLine[b1] <= a0New && refLine[b1] < columns) {
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! b1 += 2;
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}
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- } else {
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- a0New = codingLine[++a0] = columns;
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}
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break;
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! case twoDimVertL1:
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! if (refLine[b1] - 1 > a0New || (a0 == 0 && refLine[b1] == 1)) {
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! a0New = codingLine[++a0] = refLine[b1] - 1;
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! --b1;
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! while (refLine[b1] <= a0New && refLine[b1] < columns) {
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! b1 += 2;
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}
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}
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break;
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! case twoDimVertR2:
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! if (refLine[b1] + 2 < columns) {
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! a0New = codingLine[++a0] = refLine[b1] + 2;
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! ++b1;
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! while (refLine[b1] <= a0New && refLine[b1] < columns) {
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! b1 += 2;
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}
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- } else {
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- a0New = codingLine[++a0] = columns;
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}
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break;
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case twoDimVertL2:
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! if (refLine[b1] - 2 > a0New || (a0 == 0 && refLine[b1] == 2)) {
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! a0New = codingLine[++a0] = refLine[b1] - 2;
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! --b1;
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! while (refLine[b1] <= a0New && refLine[b1] < columns) {
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! b1 += 2;
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}
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! }
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! break;
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! case twoDimVertR3:
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! if (refLine[b1] + 3 < columns) {
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! a0New = codingLine[++a0] = refLine[b1] + 3;
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! ++b1;
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! while (refLine[b1] <= a0New && refLine[b1] < columns) {
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! b1 += 2;
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}
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- } else {
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- a0New = codingLine[++a0] = columns;
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}
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break;
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! case twoDimVertL3:
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! if (refLine[b1] - 3 > a0New || (a0 == 0 && refLine[b1] == 3)) {
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! a0New = codingLine[++a0] = refLine[b1] - 3;
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! --b1;
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! while (refLine[b1] <= a0New && refLine[b1] < columns) {
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! b1 += 2;
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}
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}
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break;
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case EOF:
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eof = gTrue;
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! codingLine[a0 = 0] = columns;
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! return EOF;
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default:
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error(getPos(), "Bad 2D code %04x in CCITTFax stream", code1);
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err = gTrue;
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break;
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}
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! } while (codingLine[a0] < columns);
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// 1-D encoding
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} else {
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! codingLine[a0 = 0] = 0;
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! while (1) {
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code1 = 0;
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! do {
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! code1 += code3 = getWhiteCode();
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! } while (code3 >= 64);
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! codingLine[a0+1] = codingLine[a0] + code1;
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! ++a0;
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! if (codingLine[a0] >= columns) {
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! break;
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! }
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! code2 = 0;
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! do {
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! code2 += code3 = getBlackCode();
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! } while (code3 >= 64);
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! codingLine[a0+1] = codingLine[a0] + code2;
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! ++a0;
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! if (codingLine[a0] >= columns) {
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! break;
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}
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}
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}
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- if (codingLine[a0] != columns) {
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- error(getPos(), "CCITTFax row is wrong length (%d)", codingLine[a0]);
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- // force the row to be the correct length
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- while (codingLine[a0] > columns) {
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- --a0;
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- }
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- codingLine[++a0] = columns;
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- err = gTrue;
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- }
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-
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// byte-align the row
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if (byteAlign) {
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inputBits &= ~7;
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--- 1300,1529 ----
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}
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}
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+ inline void CCITTFaxStream::addPixels(int a1, int blackPixels) {
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+ if (a1 > codingLine[a0i]) {
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+ if (a1 > columns) {
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+ error(getPos(), "CCITTFax row is wrong length (%d)", a1);
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+ err = gTrue;
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+ a1 = columns;
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+ }
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+ if ((a0i & 1) ^ blackPixels) {
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+ ++a0i;
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+ }
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+ codingLine[a0i] = a1;
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+ }
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+ }
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+
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+ inline void CCITTFaxStream::addPixelsNeg(int a1, int blackPixels) {
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+ if (a1 > codingLine[a0i]) {
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+ if (a1 > columns) {
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+ error(getPos(), "CCITTFax row is wrong length (%d)", a1);
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+ err = gTrue;
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+ a1 = columns;
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+ }
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+ if ((a0i & 1) ^ blackPixels) {
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+ ++a0i;
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+ }
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+ codingLine[a0i] = a1;
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+ } else if (a1 < codingLine[a0i]) {
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+ if (a1 < 0) {
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+ error(getPos(), "Invalid CCITTFax code");
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+ err = gTrue;
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+ a1 = 0;
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+ }
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+ while (a0i > 0 && a1 <= codingLine[a0i - 1]) {
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+ --a0i;
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+ }
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+ codingLine[a0i] = a1;
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+ }
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+ }
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+
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int CCITTFaxStream::lookChar() {
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short code1, code2, code3;
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! int b1i, blackPixels, i, bits;
|
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|
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! GBool gotEOL;
|
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|
|
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! if (buf != EOF) {
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! return buf;
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}
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// read the next row
|
||
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! if (outputBits == 0) {
|
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!
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! // if at eof just return EOF
|
||
|
|
! if (eof) {
|
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|
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! return EOF;
|
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|
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! }
|
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!
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|
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! err = gFalse;
|
||
|
|
|
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|
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// 2-D encoding
|
||
|
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if (nextLine2D) {
|
||
|
|
for (i = 0; codingLine[i] < columns; ++i) {
|
||
|
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refLine[i] = codingLine[i];
|
||
|
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}
|
||
|
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! refLine[i++] = columns;
|
||
|
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! refLine[i] = columns;
|
||
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! codingLine[0] = 0;
|
||
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! a0i = 0;
|
||
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! b1i = 0;
|
||
|
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! blackPixels = 0;
|
||
|
|
! // invariant:
|
||
|
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! // refLine[b1i-1] <= codingLine[a0i] < refLine[b1i] < refLine[b1i+1]
|
||
|
|
! // <= columns
|
||
|
|
! // exception at left edge:
|
||
|
|
! // codingLine[a0i = 0] = refLine[b1i = 0] = 0 is possible
|
||
|
|
! // exception at right edge:
|
||
|
|
! // refLine[b1i] = refLine[b1i+1] = columns is possible
|
||
|
|
! while (codingLine[a0i] < columns) {
|
||
|
|
code1 = getTwoDimCode();
|
||
|
|
switch (code1) {
|
||
|
|
case twoDimPass:
|
||
|
|
! addPixels(refLine[b1i + 1], blackPixels);
|
||
|
|
! if (refLine[b1i + 1] < columns) {
|
||
|
|
! b1i += 2;
|
||
|
|
}
|
||
|
|
break;
|
||
|
|
case twoDimHoriz:
|
||
|
|
! code1 = code2 = 0;
|
||
|
|
! if (blackPixels) {
|
||
|
|
do {
|
||
|
|
! code1 += code3 = getBlackCode();
|
||
|
|
} while (code3 >= 64);
|
||
|
|
do {
|
||
|
|
! code2 += code3 = getWhiteCode();
|
||
|
|
} while (code3 >= 64);
|
||
|
|
} else {
|
||
|
|
do {
|
||
|
|
! code1 += code3 = getWhiteCode();
|
||
|
|
} while (code3 >= 64);
|
||
|
|
do {
|
||
|
|
! code2 += code3 = getBlackCode();
|
||
|
|
} while (code3 >= 64);
|
||
|
|
}
|
||
|
|
! addPixels(codingLine[a0i] + code1, blackPixels);
|
||
|
|
! if (codingLine[a0i] < columns) {
|
||
|
|
! addPixels(codingLine[a0i] + code2, blackPixels ^ 1);
|
||
|
|
! }
|
||
|
|
! while (refLine[b1i] <= codingLine[a0i] && refLine[b1i] < columns) {
|
||
|
|
! b1i += 2;
|
||
|
|
! }
|
||
|
|
! break;
|
||
|
|
! case twoDimVertR3:
|
||
|
|
! addPixels(refLine[b1i] + 3, blackPixels);
|
||
|
|
! blackPixels ^= 1;
|
||
|
|
! if (codingLine[a0i] < columns) {
|
||
|
|
! ++b1i;
|
||
|
|
! while (refLine[b1i] <= codingLine[a0i] && refLine[b1i] < columns) {
|
||
|
|
! b1i += 2;
|
||
|
|
}
|
||
|
|
}
|
||
|
|
break;
|
||
|
|
! case twoDimVertR2:
|
||
|
|
! addPixels(refLine[b1i] + 2, blackPixels);
|
||
|
|
! blackPixels ^= 1;
|
||
|
|
! if (codingLine[a0i] < columns) {
|
||
|
|
! ++b1i;
|
||
|
|
! while (refLine[b1i] <= codingLine[a0i] && refLine[b1i] < columns) {
|
||
|
|
! b1i += 2;
|
||
|
|
}
|
||
|
|
}
|
||
|
|
break;
|
||
|
|
case twoDimVertR1:
|
||
|
|
! addPixels(refLine[b1i] + 1, blackPixels);
|
||
|
|
! blackPixels ^= 1;
|
||
|
|
! if (codingLine[a0i] < columns) {
|
||
|
|
! ++b1i;
|
||
|
|
! while (refLine[b1i] <= codingLine[a0i] && refLine[b1i] < columns) {
|
||
|
|
! b1i += 2;
|
||
|
|
}
|
||
|
|
}
|
||
|
|
break;
|
||
|
|
! case twoDimVert0:
|
||
|
|
! addPixels(refLine[b1i], blackPixels);
|
||
|
|
! blackPixels ^= 1;
|
||
|
|
! if (codingLine[a0i] < columns) {
|
||
|
|
! ++b1i;
|
||
|
|
! while (refLine[b1i] <= codingLine[a0i] && refLine[b1i] < columns) {
|
||
|
|
! b1i += 2;
|
||
|
|
}
|
||
|
|
}
|
||
|
|
break;
|
||
|
|
! case twoDimVertL3:
|
||
|
|
! addPixelsNeg(refLine[b1i] - 3, blackPixels);
|
||
|
|
! blackPixels ^= 1;
|
||
|
|
! if (codingLine[a0i] < columns) {
|
||
|
|
! if (b1i > 0) {
|
||
|
|
! --b1i;
|
||
|
|
! } else {
|
||
|
|
! ++b1i;
|
||
|
|
! }
|
||
|
|
! while (refLine[b1i] <= codingLine[a0i] && refLine[b1i] < columns) {
|
||
|
|
! b1i += 2;
|
||
|
|
}
|
||
|
|
}
|
||
|
|
break;
|
||
|
|
case twoDimVertL2:
|
||
|
|
! addPixelsNeg(refLine[b1i] - 2, blackPixels);
|
||
|
|
! blackPixels ^= 1;
|
||
|
|
! if (codingLine[a0i] < columns) {
|
||
|
|
! if (b1i > 0) {
|
||
|
|
! --b1i;
|
||
|
|
! } else {
|
||
|
|
! ++b1i;
|
||
|
|
}
|
||
|
|
! while (refLine[b1i] <= codingLine[a0i] && refLine[b1i] < columns) {
|
||
|
|
! b1i += 2;
|
||
|
|
}
|
||
|
|
}
|
||
|
|
break;
|
||
|
|
! case twoDimVertL1:
|
||
|
|
! addPixelsNeg(refLine[b1i] - 1, blackPixels);
|
||
|
|
! blackPixels ^= 1;
|
||
|
|
! if (codingLine[a0i] < columns) {
|
||
|
|
! if (b1i > 0) {
|
||
|
|
! --b1i;
|
||
|
|
! } else {
|
||
|
|
! ++b1i;
|
||
|
|
! }
|
||
|
|
! while (refLine[b1i] <= codingLine[a0i] && refLine[b1i] < columns) {
|
||
|
|
! b1i += 2;
|
||
|
|
}
|
||
|
|
}
|
||
|
|
break;
|
||
|
|
case EOF:
|
||
|
|
+ addPixels(columns, 0);
|
||
|
|
eof = gTrue;
|
||
|
|
! break;
|
||
|
|
default:
|
||
|
|
error(getPos(), "Bad 2D code %04x in CCITTFax stream", code1);
|
||
|
|
+ addPixels(columns, 0);
|
||
|
|
err = gTrue;
|
||
|
|
break;
|
||
|
|
}
|
||
|
|
! }
|
||
|
|
|
||
|
|
// 1-D encoding
|
||
|
|
} else {
|
||
|
|
! codingLine[0] = 0;
|
||
|
|
! a0i = 0;
|
||
|
|
! blackPixels = 0;
|
||
|
|
! while (codingLine[a0i] < columns) {
|
||
|
|
code1 = 0;
|
||
|
|
! if (blackPixels) {
|
||
|
|
! do {
|
||
|
|
! code1 += code3 = getBlackCode();
|
||
|
|
! } while (code3 >= 64);
|
||
|
|
! } else {
|
||
|
|
! do {
|
||
|
|
! code1 += code3 = getWhiteCode();
|
||
|
|
! } while (code3 >= 64);
|
||
|
|
}
|
||
|
|
+ addPixels(codingLine[a0i] + code1, blackPixels);
|
||
|
|
+ blackPixels ^= 1;
|
||
|
|
}
|
||
|
|
}
|
||
|
|
|
||
|
|
// byte-align the row
|
||
|
|
if (byteAlign) {
|
||
|
|
inputBits &= ~7;
|
||
|
|
***************
|
||
|
|
*** 1560,1573 ****
|
||
|
|
// this if we know the stream contains end-of-line markers because
|
||
|
|
// the "just plow on" technique tends to work better otherwise
|
||
|
|
} else if (err && endOfLine) {
|
||
|
|
! do {
|
||
|
|
if (code1 == EOF) {
|
||
|
|
eof = gTrue;
|
||
|
|
return EOF;
|
||
|
|
}
|
||
|
|
eatBits(1);
|
||
|
|
! code1 = lookBits(13);
|
||
|
|
! } while ((code1 >> 1) != 0x001);
|
||
|
|
eatBits(12);
|
||
|
|
if (encoding > 0) {
|
||
|
|
eatBits(1);
|
||
|
|
--- 1582,1598 ----
|
||
|
|
// this if we know the stream contains end-of-line markers because
|
||
|
|
// the "just plow on" technique tends to work better otherwise
|
||
|
|
} else if (err && endOfLine) {
|
||
|
|
! while (1) {
|
||
|
|
! code1 = lookBits(13);
|
||
|
|
if (code1 == EOF) {
|
||
|
|
eof = gTrue;
|
||
|
|
return EOF;
|
||
|
|
}
|
||
|
|
+ if ((code1 >> 1) == 0x001) {
|
||
|
|
+ break;
|
||
|
|
+ }
|
||
|
|
eatBits(1);
|
||
|
|
! }
|
||
|
|
eatBits(12);
|
||
|
|
if (encoding > 0) {
|
||
|
|
eatBits(1);
|
||
|
|
***************
|
||
|
|
*** 1575,1585 ****
|
||
|
|
}
|
||
|
|
}
|
||
|
|
|
||
|
|
! a0 = 0;
|
||
|
|
! outputBits = codingLine[1] - codingLine[0];
|
||
|
|
! if (outputBits == 0) {
|
||
|
|
! a0 = 1;
|
||
|
|
! outputBits = codingLine[2] - codingLine[1];
|
||
|
|
}
|
||
|
|
|
||
|
|
++row;
|
||
|
|
--- 1600,1610 ----
|
||
|
|
}
|
||
|
|
}
|
||
|
|
|
||
|
|
! // set up for output
|
||
|
|
! if (codingLine[0] > 0) {
|
||
|
|
! outputBits = codingLine[a0i = 0];
|
||
|
|
! } else {
|
||
|
|
! outputBits = codingLine[a0i = 1];
|
||
|
|
}
|
||
|
|
|
||
|
|
++row;
|
||
|
|
***************
|
||
|
|
*** 1587,1625 ****
|
||
|
|
|
||
|
|
// get a byte
|
||
|
|
if (outputBits >= 8) {
|
||
|
|
! ret = ((a0 & 1) == 0) ? 0xff : 0x00;
|
||
|
|
! if ((outputBits -= 8) == 0) {
|
||
|
|
! ++a0;
|
||
|
|
! if (codingLine[a0] < columns) {
|
||
|
|
! outputBits = codingLine[a0 + 1] - codingLine[a0];
|
||
|
|
! }
|
||
|
|
}
|
||
|
|
} else {
|
||
|
|
bits = 8;
|
||
|
|
! ret = 0;
|
||
|
|
do {
|
||
|
|
if (outputBits > bits) {
|
||
|
|
! i = bits;
|
||
|
|
! bits = 0;
|
||
|
|
! if ((a0 & 1) == 0) {
|
||
|
|
! ret |= 0xff >> (8 - i);
|
||
|
|
}
|
||
|
|
! outputBits -= i;
|
||
|
|
} else {
|
||
|
|
! i = outputBits;
|
||
|
|
! bits -= outputBits;
|
||
|
|
! if ((a0 & 1) == 0) {
|
||
|
|
! ret |= (0xff >> (8 - i)) << bits;
|
||
|
|
}
|
||
|
|
outputBits = 0;
|
||
|
|
! ++a0;
|
||
|
|
! if (codingLine[a0] < columns) {
|
||
|
|
! outputBits = codingLine[a0 + 1] - codingLine[a0];
|
||
|
|
}
|
||
|
|
}
|
||
|
|
! } while (bits > 0 && codingLine[a0] < columns);
|
||
|
|
}
|
||
|
|
- buf = black ? (ret ^ 0xff) : ret;
|
||
|
|
return buf;
|
||
|
|
}
|
||
|
|
|
||
|
|
--- 1612,1654 ----
|
||
|
|
|
||
|
|
// get a byte
|
||
|
|
if (outputBits >= 8) {
|
||
|
|
! buf = (a0i & 1) ? 0x00 : 0xff;
|
||
|
|
! outputBits -= 8;
|
||
|
|
! if (outputBits == 0 && codingLine[a0i] < columns) {
|
||
|
|
! ++a0i;
|
||
|
|
! outputBits = codingLine[a0i] - codingLine[a0i - 1];
|
||
|
|
}
|
||
|
|
} else {
|
||
|
|
bits = 8;
|
||
|
|
! buf = 0;
|
||
|
|
do {
|
||
|
|
if (outputBits > bits) {
|
||
|
|
! buf <<= bits;
|
||
|
|
! if (!(a0i & 1)) {
|
||
|
|
! buf |= 0xff >> (8 - bits);
|
||
|
|
}
|
||
|
|
! outputBits -= bits;
|
||
|
|
! bits = 0;
|
||
|
|
} else {
|
||
|
|
! buf <<= outputBits;
|
||
|
|
! if (!(a0i & 1)) {
|
||
|
|
! buf |= 0xff >> (8 - outputBits);
|
||
|
|
}
|
||
|
|
+ bits -= outputBits;
|
||
|
|
outputBits = 0;
|
||
|
|
! if (codingLine[a0i] < columns) {
|
||
|
|
! ++a0i;
|
||
|
|
! outputBits = codingLine[a0i] - codingLine[a0i - 1];
|
||
|
|
! } else if (bits > 0) {
|
||
|
|
! buf <<= bits;
|
||
|
|
! bits = 0;
|
||
|
|
}
|
||
|
|
}
|
||
|
|
! } while (bits);
|
||
|
|
! }
|
||
|
|
! if (black) {
|
||
|
|
! buf ^= 0xff;
|
||
|
|
}
|
||
|
|
return buf;
|
||
|
|
}
|
||
|
|
|
||
|
|
***************
|
||
|
|
*** 1661,1666 ****
|
||
|
|
--- 1690,1698 ----
|
||
|
|
code = 0; // make gcc happy
|
||
|
|
if (endOfBlock) {
|
||
|
|
code = lookBits(12);
|
||
|
|
+ if (code == EOF) {
|
||
|
|
+ return 1;
|
||
|
|
+ }
|
||
|
|
if ((code >> 5) == 0) {
|
||
|
|
p = &whiteTab1[code];
|
||
|
|
} else {
|
||
|
|
***************
|
||
|
|
*** 1673,1678 ****
|
||
|
|
--- 1705,1713 ----
|
||
|
|
} else {
|
||
|
|
for (n = 1; n <= 9; ++n) {
|
||
|
|
code = lookBits(n);
|
||
|
|
+ if (code == EOF) {
|
||
|
|
+ return 1;
|
||
|
|
+ }
|
||
|
|
if (n < 9) {
|
||
|
|
code <<= 9 - n;
|
||
|
|
}
|
||
|
|
***************
|
||
|
|
*** 1684,1689 ****
|
||
|
|
--- 1719,1727 ----
|
||
|
|
}
|
||
|
|
for (n = 11; n <= 12; ++n) {
|
||
|
|
code = lookBits(n);
|
||
|
|
+ if (code == EOF) {
|
||
|
|
+ return 1;
|
||
|
|
+ }
|
||
|
|
if (n < 12) {
|
||
|
|
code <<= 12 - n;
|
||
|
|
}
|
||
|
|
***************
|
||
|
|
*** 1709,1717 ****
|
||
|
|
code = 0; // make gcc happy
|
||
|
|
if (endOfBlock) {
|
||
|
|
code = lookBits(13);
|
||
|
|
if ((code >> 7) == 0) {
|
||
|
|
p = &blackTab1[code];
|
||
|
|
! } else if ((code >> 9) == 0) {
|
||
|
|
p = &blackTab2[(code >> 1) - 64];
|
||
|
|
} else {
|
||
|
|
p = &blackTab3[code >> 7];
|
||
|
|
--- 1747,1758 ----
|
||
|
|
code = 0; // make gcc happy
|
||
|
|
if (endOfBlock) {
|
||
|
|
code = lookBits(13);
|
||
|
|
+ if (code == EOF) {
|
||
|
|
+ return 1;
|
||
|
|
+ }
|
||
|
|
if ((code >> 7) == 0) {
|
||
|
|
p = &blackTab1[code];
|
||
|
|
! } else if ((code >> 9) == 0 && (code >> 7) != 0) {
|
||
|
|
p = &blackTab2[(code >> 1) - 64];
|
||
|
|
} else {
|
||
|
|
p = &blackTab3[code >> 7];
|
||
|
|
***************
|
||
|
|
*** 1723,1728 ****
|
||
|
|
--- 1764,1772 ----
|
||
|
|
} else {
|
||
|
|
for (n = 2; n <= 6; ++n) {
|
||
|
|
code = lookBits(n);
|
||
|
|
+ if (code == EOF) {
|
||
|
|
+ return 1;
|
||
|
|
+ }
|
||
|
|
if (n < 6) {
|
||
|
|
code <<= 6 - n;
|
||
|
|
}
|
||
|
|
***************
|
||
|
|
*** 1734,1739 ****
|
||
|
|
--- 1778,1786 ----
|
||
|
|
}
|
||
|
|
for (n = 7; n <= 12; ++n) {
|
||
|
|
code = lookBits(n);
|
||
|
|
+ if (code == EOF) {
|
||
|
|
+ return 1;
|
||
|
|
+ }
|
||
|
|
if (n < 12) {
|
||
|
|
code <<= 12 - n;
|
||
|
|
}
|
||
|
|
***************
|
||
|
|
*** 1747,1752 ****
|
||
|
|
--- 1794,1802 ----
|
||
|
|
}
|
||
|
|
for (n = 10; n <= 13; ++n) {
|
||
|
|
code = lookBits(n);
|
||
|
|
+ if (code == EOF) {
|
||
|
|
+ return 1;
|
||
|
|
+ }
|
||
|
|
if (n < 13) {
|
||
|
|
code <<= 13 - n;
|
||
|
|
}
|
||
|
|
***************
|
||
|
|
*** 1961,1966 ****
|
||
|
|
--- 2011,2022 ----
|
||
|
|
// allocate a buffer for the whole image
|
||
|
|
bufWidth = ((width + mcuWidth - 1) / mcuWidth) * mcuWidth;
|
||
|
|
bufHeight = ((height + mcuHeight - 1) / mcuHeight) * mcuHeight;
|
||
|
|
+ if (bufWidth <= 0 || bufHeight <= 0 ||
|
||
|
|
+ bufWidth > INT_MAX / bufWidth / (int)sizeof(int)) {
|
||
|
|
+ error(getPos(), "Invalid image size in DCT stream");
|
||
|
|
+ y = height;
|
||
|
|
+ return;
|
||
|
|
+ }
|
||
|
|
for (i = 0; i < numComps; ++i) {
|
||
|
|
frameBuf[i] = (int *)gmallocn(bufWidth * bufHeight, sizeof(int));
|
||
|
|
memset(frameBuf[i], 0, bufWidth * bufHeight * sizeof(int));
|
||
|
|
***************
|
||
|
|
*** 3036,3041 ****
|
||
|
|
--- 3092,3102 ----
|
||
|
|
}
|
||
|
|
scanInfo.firstCoeff = str->getChar();
|
||
|
|
scanInfo.lastCoeff = str->getChar();
|
||
|
|
+ if (scanInfo.firstCoeff < 0 || scanInfo.lastCoeff > 63 ||
|
||
|
|
+ scanInfo.firstCoeff > scanInfo.lastCoeff) {
|
||
|
|
+ error(getPos(), "Bad DCT coefficient numbers in scan info block");
|
||
|
|
+ return gFalse;
|
||
|
|
+ }
|
||
|
|
c = str->getChar();
|
||
|
|
scanInfo.ah = (c >> 4) & 0x0f;
|
||
|
|
scanInfo.al = c & 0x0f;
|
||
|
|
diff -c -r xpdf-3.02pl1.orig/xpdf/Stream.h xpdf-3.02/xpdf/Stream.h
|
||
|
|
*** xpdf-3.02pl1.orig/xpdf/Stream.h Tue Feb 27 14:05:52 2007
|
||
|
|
--- xpdf-3.02/xpdf/Stream.h Thu Oct 25 15:48:15 2007
|
||
|
|
***************
|
||
|
|
*** 528,540 ****
|
||
|
|
int row; // current row
|
||
|
|
int inputBuf; // input buffer
|
||
|
|
int inputBits; // number of bits in input buffer
|
||
|
|
! short *refLine; // reference line changing elements
|
||
|
|
! int b1; // index into refLine
|
||
|
|
! short *codingLine; // coding line changing elements
|
||
|
|
! int a0; // index into codingLine
|
||
|
|
int outputBits; // remaining ouput bits
|
||
|
|
int buf; // character buffer
|
||
|
|
|
||
|
|
short getTwoDimCode();
|
||
|
|
short getWhiteCode();
|
||
|
|
short getBlackCode();
|
||
|
|
--- 528,542 ----
|
||
|
|
int row; // current row
|
||
|
|
int inputBuf; // input buffer
|
||
|
|
int inputBits; // number of bits in input buffer
|
||
|
|
! int *codingLine; // coding line changing elements
|
||
|
|
! int *refLine; // reference line changing elements
|
||
|
|
! int a0i; // index into codingLine
|
||
|
|
! GBool err; // error on current line
|
||
|
|
int outputBits; // remaining ouput bits
|
||
|
|
int buf; // character buffer
|
||
|
|
|
||
|
|
+ void addPixels(int a1, int black);
|
||
|
|
+ void addPixelsNeg(int a1, int black);
|
||
|
|
short getTwoDimCode();
|
||
|
|
short getWhiteCode();
|
||
|
|
short getBlackCode();
|