#!/bin/bash

echo Converting ISPC tutorial $1 to CPP tutorial $2
cp $1 $2

# uniform functions
sed -i.backup 's/uniform float uniformSampleConePDF/uniform float _uniformSampleConePDF/g' $2
sed -i.backup 's/uniform float uniformSampleDiskPDF/uniform float _uniformSampleDiskPDF/g' $2

# ISPC language
sed -i.backup  's/.isph\"/.h\"/g' $2
sed -i.backup  's/uniform //g' $2
sed -i.backup  's/ uniform\*/\*/g' $2
sed -i.backup  's/ uniform)/)/g' $2
sed -i.backup  's/*uniform)/*)/g' $2
sed -i.backup  's/varying //g' $2
sed -i.backup  's/ varying//g' $2
sed -i.backup  's/unmasked //g' $2
sed -i.backup  's/extern \"C\"/__EXTERN_C/g' $2
sed -i.backup  's/extern/extern \"C\"/g' $2
sed -i.backup  's/export/extern \"C\"/g' $2
sed -i.backup  's/extern \"C\" RTCScene g_scene/extern RTCScene g_scene/g' $2
sed -i.backup  's/__EXTERN_C/extern \"C\"/g' $2

sed -i.backup 's/int8/char/g' $2
sed -i.backup 's/int16/int16_t/g' $2
sed -i.backup 's/int32/int32_t/g' $2
sed -i.backup 's/int64/int64_t/g' $2
sed -i.backup 's/uchar/uint8_t/g' $2

sed -i.backup  's/__mask/1/g' $2
sed -i.backup  's/NULL/nullptr/g' $2

sed -i.backup  's/programIndex/0/g' $2
sed -i.backup  's/programCount/1/g' $2
sed -i.backup  's/task[ ]*void[ ]*\([a-zA-Z0-9_]*\)[ ]*(/void \1 (int taskIndex, /g' $2
sed -i.backup  's/launch\[\([^]]*\)\][ ]*\([a-zA-Z0-9_]*\)[ ]*(\([^)]*\))/parallel_for(size_t(0),size_t(\1),[\&](const range<size_t>\& range) \{\
    for (size_t i=range.begin(); i<range.end(); i++)\
      \2((int)i,\3);\
  \})/g' $2

sed -i.backup  's/foreach[ ]*([ ]*\([a-zA-Z0-9_]*\)[ ]*=[ ]*\([^ \.]*\)[ ]*\.\.\.[ ]*\([^ ),]*\)[ ]*)/for (unsigned int \1=\2; \1<\3; \1++)/g' $2
sed -i.backup  's/foreach_tiled[ ]*([ ]*\([a-zA-Z0-9_]*\)[ ]*=[ ]*\([^ \.]*\)[ ]*\.\.\.[ ]*\([^ ),]*\)[ ]*)/for (unsigned int \1=\2; \1<\3; \1++)/g' $2

sed -i.backup  's/foreach[ ]*([ ]*\([a-zA-Z0-9_]*\)[ ]*=[ ]*\([^ \.]*\)[ ]*\.\.\.[ ]*\([^ ),]*\)[ ]*\,[ ]*\([a-zA-Z0-9_]*\)[ ]*=[ ]*\([^ \.]*\)[ ]*\.\.\.[ ]*\([^ ),]*\)[ ]*)/for (unsigned int \1=\2; \1<\3; \1++) for (int \4=\5; \4<\6; \4++)/g' $2
sed -i.backup  's/foreach_tiled[ ]*([ ]*\([a-zA-Z0-9_]*\)[ ]*=[ ]*\([^ \.]*\)[ ]*\.\.\.[ ]*\([^ ),]*\)[ ]*\,[ ]*\([a-zA-Z0-9_]*\)[ ]*=[ ]*\([^ \.]*\)[ ]*\.\.\.[ ]*\([^ ),]*\)[ ]*)/for (unsigned int \1=\2; \1<\3; \1++) for (unsigned int \4=\5; \4<\6; \4++)/g' $2

sed -i.backup  's/foreach_unique[ ]*([ ]*\([[:alnum:]_]*\)[ ]*in[ ]*\([[:alnum:]._]*\))/unsigned int \1 = \2;/g' $2

sed -i.backup  's/new[ ]*\([a-zA-Z0-9_]*\)[ ]*\[\([^]]*\)\]/(\1\*) alignedMalloc(\2\*sizeof(\1))/g' $2
sed -i.backup  's/delete[ ]*\[[ ]*\][ ]*\([a-zA-Z0-9_]*\)/alignedFree(\1)/g' $2

sed -i.backup  's/new[ ]*\([a-zA-Z0-9_]*\)[ ]*;/(\1\*) alignedMalloc(sizeof(\1));/g' $2
sed -i.backup  's/delete[ ]*\([a-zA-Z0-9_]*\)[ ]*;/alignedFree(\1);/g' $2

# system library
sed -i.backup  's/sync;//g' $2
sed -i.backup  's/print(/printf(/g' $2
sed -i.backup  's/abort()/exit(1)/g' $2
sed -i.backup 's/atomic_compare_exchange_global/atomic_cmpxchg/g' $2
sed -i.backup 's/memory_barrier/__memory_barrier/g' $2

# math library
sed -i.backup  's/Vec3f\([^a]\)/Vec3fa\1/g' $2
sed -i.backup 's/LinearSpace3f/LinearSpace3fa/g' $2
sed -i.backup 's/AffineSpace3f\([^a]\)/AffineSpace3fa\1/g' $2

sed -i.backup  's/make_Ray/RTCRay/g' $2
sed -i.backup 's/make_LinearSpace3fa_scale/LinearSpace3fa::scale/g' $2
sed -i.backup 's/make_LinearSpace3fa_rotate/LinearSpace3fa::rotate/g' $2
sed -i.backup 's/make_AffineSpace3fa_scale/AffineSpace3fa::scale/g' $2
sed -i.backup 's/make_AffineSpace3fa_rotate/AffineSpace3fa::rotate/g' $2
sed -i.backup 's/make_AffineSpace3fa_translate/AffineSpace3fa::translate/g' $2

sed -i.backup  's/M_PI/float(pi)/g' $2
sed -i.backup  's/\*pi\*/\*float(pi)\*/g' $2
sed -i.backup  's/\*pi\//\*float(pi)\//g' $2
sed -i.backup  's/one_over_pi/float(one_over_pi)/g' $2
sed -i.backup  's/one_over_two_pi/float(one_over_two_pi)/g' $2
sed -i.backup  's/one_over_four_pi/float(one_over_four_pi)/g' $2
sed -i.backup  's/(two_pi/(float(two_pi)/g' $2
sed -i.backup  's/[^_(]two_pi/float(two_pi)/g' $2
sed -i.backup  's/make_Vec2f/Vec2f/g' $2
sed -i.backup  's/make_Vec2i/Vec2i/g' $2
sed -i.backup  's/make_Vec3f/Vec3f/g' $2
sed -i.backup  's/make_Vec3fa/Vec3fa/g' $2
sed -i.backup  's/make_Vec4f/Vec4f/g' $2
#sed -i.backup  's/make_Sample3f/Sample3f/g' $2
sed -i.backup  's/make_AffineSpace3f/AffineSpace3f/g' $2

sed -i.backup 's/sincos/sincosf/g' $2
sed -i.backup 's/ lerp/ lerpr/g' $2
sed -i 's/\/\/ALIGNED_STRUCT/ALIGNED_STRUCT/g' $2

# Embree specific
sed -i.backup  's/RTC_INTERSECT_UNIFORM | RTC_INTERSECT_VARYING/RTC_INTERSECT1/g' $2
sed -i.backup  's/RTC_INTERSECT_UNIFORM/RTC_INTERSECT1/g' $2
sed -i.backup  's/RTC_INTERSECT_VARYING/RTC_INTERSECT1/g' $2
sed -i.backup  's/RTC_MATRIX_COLUMN_MAJOR/RTC_MATRIX_COLUMN_MAJOR_ALIGNED16/g' $2
sed -i.backup  's/RTC_MATRIX_COLUMN_MAJOR_ALIGNED16_ALIGNED16/RTC_MATRIX_COLUMN_MAJOR_ALIGNED16/g' $2

sed -i.backup  's/RTCIntersectFuncVarying/RTCIntersectFunc/g' $2
sed -i.backup  's/RTCOccludedFuncVarying/RTCOccludedFunc/g' $2
sed -i.backup  's/RTCFilterFuncVarying/RTCFilterFunc/g' $2

sed -i.backup  's/RTCRay1/RTCRay/g' $2
sed -i.backup  's/rtcIntersect1/rtcIntersect/g' $2

sed -i.backup  's/rtcIntersectVM/rtcIntersect1M/g' $2
sed -i.backup  's/rtcOccludedVM/rtcOccluded1M/g' $2

sed -i.backup  's/Texture_FLOAT32/Texture::FLOAT32/g' $2
sed -i.backup  's/Texture_RGBA8/Texture::RGBA8/g' $2
sed -i.backup  's/Texture_RGB8/Texture::RGB8/g' $2

# to make 32 bit compile happy under Windows
sed -i.backup 's/const Vec3fa defaultValue/const Vec3fa\& defaultValue/g' $2

# to make static analysis happy
sed -i.backup 's/if (all(1 == 0)) continue;//g' $2

# add Embree namespace
ln=`grep -n -E "#include|#pragma" $2 | tail -1 | cut -d: -f1`
mv $2 $2.backup
head -n $ln $2.backup > $2
echo >> $2
echo 'namespace embree {' >> $2
tail -n +$(($ln+1)) $2.backup >> $2
echo >> $2
echo '} // namespace embree' >> $2