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#!/bin/sh
TMP=patcheck.tmp
OPT="-nH"
#FILES=`grep '^+++' $* | sed 's/+++ //g'`
echo patCHeck 1e10.0
echo This tool is intended to help a human check/review patches it is very far from
echo being free of false positives and negatives, its output are just hints of what
echo may or may not be bad. When you use it and it misses something or detects
echo something wrong, fix it and send a patch to the ffmpeg-dev ML
echo License:GPL Autor: Michael Niedermayer
ERE_PRITYP='(unsigned *|)(char|short|long|int|long *int|short *int|void|float|double|(u|)int(8|16|32|64)_t)'
ERE_TYPES='(const|static|av_cold|inline| *)*('$ERE_PRITYP'|[a-zA-Z][a-zA-Z0-9_]*)[* ]{1,}[a-zA-Z][a-zA-Z0-9_]*'
ERE_FUNCS="$ERE_TYPES"' *\('
hiegrep(){
arg="$1"
msg="$2"
shift 2
grep $OPT '^+' $* | grep -v ':+++'| egrep --color=always -- "$arg"> $TMP && echo -e "\n$msg"
cat $TMP
}
hiegrep2(){
arg="$1"
varg="$2"
msg="$3"
shift 3
grep $OPT '^+' $* | grep -v ':+++' | egrep -v -- "$varg" | egrep --color=always -- "$arg" > $TMP && echo -e "\n$msg"
cat $TMP
}
hiegrep '[[:space:]]$' 'trailing whitespace' $*
hiegrep "`echo x | tr 'x' '\t'`" 'tabs' $*
#hiegrep ':\+$' 'Empty lines' $*
hiegrep ';;' 'double ;' $*
hiegrep2 '\b_[a-zA-Z0-9_]{1,}' '__(asm|attribute)([^a-zA-Z0-9]|$)' 'reserved identifer' $*
hiegrep '//[-/<\* ]*$' 'empty comment' $*
hiegrep '/\*[-<\* ]*\*/' 'empty comment' $*
hiegrep 'for *\( *'"$ERE_PRITYP"' ' 'not gcc 2.95 compatible' $*
hiegrep2 '(int|unsigned|static|void)[a-zA-Z0-9 _]*(init|end)[a-zA-Z0-9 _]*\(.*[^;]$' '(av_cold|:\+[^a-zA-Z_])' 'These functions may need av_cold, please review the whole patch for similar functions needing av_cold' $*
hiegrep '\+= *1 *;' 'can be simplified to ++' $*
hiegrep '-= *1 *;' 'can be simplified to --' $*
hiegrep '((!|=)= *(0|NULL)[^0-9a-z]|[^0-9a-z](0|NULL) *(!|=)=)' 'x==0 / x!=0 can be simplified to !x / x' $*
egrep $OPT '^\+ *(const *|)static' $*| egrep --color=always '[^=]= *(0|NULL)[^0-9a-zA-Z]'> $TMP && echo -e '\nuseless 0 init'
cat $TMP
hiegrep '# *ifdef * (HAVE|CONFIG)_' 'ifdefs that should be #if' $*
hiegrep '\b(awnser|cant|dont|quantised|quantisation|teh|wont)\b' 'common typos' $*
hiegrep 'av_log\( *NULL' 'Missing context in av_log' $*
hiegrep '[^sn]printf' 'Please use av_log' $*
hiegrep '\bmalloc' 'Please use av_malloc' $*
hiegrep '\) *av_malloc' 'useless casts' $*
hiegrep ':\+ *'"$ERE_PRITYP"' *inline' 'non static inline or strangely ordered inline+static' $*
hiegrep "$ERE_FUNCS"' *\)' 'missing void' $*
hiegrep '(sprintf|strcat|strcpy)' 'Possible security issue, make sure this is safe or use snprintf/av_strl*' $*
hiegrep '/ *(2|4|8|16|32|64|128|256|512|1024|2048|4096|8192|16384|32768|65536)[^0-9]' 'divide by 2^x could use >> maybe' $*
hiegrep '#(el|)if *(0|1)' 'useless #if' $*
hiegrep 'if *\( *(0|1) *\)' 'useless if()' $*
hiegrep '& *[a-zA-Z0-9_]* *\[ *0 *\]' 'useless & [0]' $*
hiegrep '(\( *[0-9] *(&&|\|\|)|(&&|\|\|) *[0-9] *\))' 'overriding condition' $*
hiegrep2 '\.long_name *=' 'NULL_IF_CONFIG_SMAL' 'missing NULL_IF_CONFIG_SMAL' $*
#egrep $OPT '^\+.*const ' $*| grep -v 'static'> $TMP && echo -e '\nnon static const'
#cat $TMP
hiegrep2 "$ERE_TYPES" '(static|av_|ff_|typedef|:\+[^a-zA-Z_])' 'Non static with no ff_/av_ prefix' $*
hiegrep ':\+[^}]*else' 'missing } prior to else' $*
#FIXME this should print the previous statement maybe
hiegrep ':\+ *{ *$' '{ should be on the same line as the related previous statement' $*
rm $TMP
for i in `grep -H '^+.*@param' $*| sed 's/^\([^:]*\):.*@param *\([a-zA-Z0-9_]*\) .*$/\1:\2/'` ; do
doxpar=`echo $i | sed 's/^.*:\(.*\)$/\1/'`
file=`echo $i | sed 's/^\([^:]*\):.*$/\1/'`
grep " *$doxpar *[),]" $file | grep -v '@param' >/dev/null || grep --color=always "@param *$doxpar" $file >>$TMP
done
if test -e $TMP ; then
echo -e '\nmismatching doxy params'
cat $TMP
fi
egrep -B2 $OPT '^(\+|) *'"$ERE_TYPES" $* | egrep -A2 --color=always '(:|-)\+.*[^/]/(\*([^*]|$)|/([^/]|$))' > $TMP && echo -e "\n Non doxy comments"
cat $TMP
rm $TMP
for i in \
`egrep -H '^\+ *'"$ERE_TYPES" $* |\
grep -v '(' | egrep -v '\Wgoto\W' |\
xargs -d '\n' -n 1 |\
grep -o '[* ][* ]*[a-zA-Z][0-9a-zA-Z_]* *[,;=]' |\
sed 's/.[* ]*\([a-zA-Z][0-9a-zA-Z_]*\) *[,;=]/\1/'` \
; do
echo $i | grep '^NULL$' && continue
egrep $i' *(\+|-|\*|/|\||&|%|)=[^=]' $* >/dev/null || echo "possibly never written:"$i >> $TMP
egrep '(=|\(|return).*'$i'[^=]*$' $* >/dev/null || echo "possibly never read :"$i >> $TMP
egrep -o $i' *((\+|-|\*|/|\||&|%|)=[^=]|\+\+|--) *(0x|)[0-9]*(;|)' $* |\
egrep -v $i' *= *(0x|)[0-9]{1,};'>/dev/null || echo "possibly constant :"$i >> $TMP
done
if test -e $TMP ; then
echo -e '\npossibly unused variables'
cat $TMP
fi
grep '^Index:.*Changelog' $* >/dev/null || echo -e "\nMissing changelog entry (ignore if minor change)"
cat $* | tr '\n' '@' | egrep --color=always -o '(fprintf|av_log|printf)\([^)]*\)[+ ;@]*\1' >$TMP && echo -e "\nMergeable calls"
cat $TMP | tr '@' '\n'
cat $* | tr '\n' '@' | egrep --color=always -o '\+ *if *\( *([A-Za-z0-9_]*) *[<>]=? *[0-9]* *\) * \1 *= *[0-9]* *;[ @\\+]*else *if *\( *\1 *[<>]=? *[0-9]* *\) *\1 *= *[0-9]* *;' >$TMP && echo -e "\nav_clip / av_clip_uint8 / av_clip_int16 / ..."
cat $TMP | tr '@' '\n'
cat $* | tr '\n' '@' | egrep --color=always -o '\+ *if *\( *([A-Za-z0-9_]*) *[<>]=? *([A-Za-z0-9_]*) *\)[ @\\+]*(\1|\2) *= *(\1|\2) *;' >$TMP && echo -e "\nFFMIN/FFMAX"
cat $TMP | tr '@' '\n'
cat $* | tr '\n' '@' | egrep --color=always -o '\+ *if *\( *([A-Za-z0-9_]*) *\)[ @\\+]*av_free(p|) *\( *(&|) *\1[^-.]' >$TMP && echo -e "\nav_free(NULL) is safe"
cat $TMP | tr '@' '\n'
cat $* | tr '\n' '@' | egrep --color=always -o '[^a-zA-Z0-9_]([a-zA-Z0-9_]*) *= *av_malloc *\([^)]*\)[ @;\\+]*memset *\( *\1' >$TMP && echo -e "\nav_mallocz()"
cat $TMP | tr '@' '\n'
# doesnt work
#cat $* | tr '\n' '@' | egrep -o '[^a-zA-Z_0-9]([a-zA-Z][a-zA-Z_0-9]*) *=[^=].*\1' | egrep -o '[^a-zA-Z_0-9]([a-zA-Z][a-zA-Z_0-9]*) *=[^=].*\1 *=[^=]' >$TMP && echo -e "\nPossibly written 2x before read"
#cat $TMP | tr '@' '\n'
exit
TODO/idea list:
for all demuxers & muxers
grep for "avctx->priv_data"
vertical align =
/* and * align
arrays fitting in smaller types
variables written to twice with no interspaced read
memset(block, 0, 6*64*sizeof(DCTELEM)); -> clear_blocks
check existence of long_name in AVCodec
check that the patch does not touch codec & (de)muxer layer at the same time ->split
write a regression test containing at least a line that triggers each warning once
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