Diffstat (limited to 'noncore/unsupported/qpdf/xpdf/Function.cc') (more/less context) (show whitespace changes)
-rw-r--r-- | noncore/unsupported/qpdf/xpdf/Function.cc | 13 |
1 files changed, 11 insertions, 2 deletions
diff --git a/noncore/unsupported/qpdf/xpdf/Function.cc b/noncore/unsupported/qpdf/xpdf/Function.cc index 815cc89..ebf3718 100644 --- a/noncore/unsupported/qpdf/xpdf/Function.cc +++ b/noncore/unsupported/qpdf/xpdf/Function.cc @@ -1,11 +1,11 @@ //======================================================================== // // Function.cc // -// Copyright 2001 Derek B. Noonburg +// Copyright 2001-2002 Glyph & Cog, LLC // //======================================================================== #ifdef __GNUC__ #pragma implementation #endif @@ -412,33 +412,34 @@ void SampledFunction::transform(fouble *in, fouble *out) { ExponentialFunction::ExponentialFunction(Object *funcObj, Dict *dict) { Object obj1, obj2; GBool hasN; int i; ok = gFalse; - hasN = gFalse; //----- initialize the generic stuff if (!init(dict)) { goto err1; } if (m != 1) { error(-1, "Exponential function with more than one input"); goto err1; } + hasN = hasRange; //----- default values for (i = 0; i < funcMaxOutputs; ++i) { c0[i] = 0; c1[i] = 1; } //----- C0 if (dict->lookup("C0", &obj1)->isArray()) { if (!hasN) { n = obj1.arrayGetLength(); + hasN = gTrue; } else if (obj1.arrayGetLength() != n) { error(-1, "Function's C0 array is wrong length"); goto err2; } for (i = 0; i < n; ++i) { obj1.arrayGet(i, &obj2); @@ -453,12 +454,13 @@ ExponentialFunction::ExponentialFunction(Object *funcObj, Dict *dict) { obj1.free(); //----- C1 if (dict->lookup("C1", &obj1)->isArray()) { if (!hasN) { n = obj1.arrayGetLength(); + hasN = gTrue; } else if (obj1.arrayGetLength() != n) { error(-1, "Function's C1 array is wrong length"); goto err2; } for (i = 0; i < n; ++i) { obj1.arrayGet(i, &obj2); @@ -477,12 +479,19 @@ ExponentialFunction::ExponentialFunction(Object *funcObj, Dict *dict) { error(-1, "Function has missing or invalid N"); goto err2; } e = obj1.getNum(); obj1.free(); + // this isn't supposed to happen, but I've run into (broken) PDF + // files where it does + if (!hasN) { + error(-1, "Exponential function does not define number of output values"); + n = 1; + } + ok = gTrue; return; err3: obj2.free(); err2: |