3 # if no argument provided, write stdin to a file and re-run the script
15 #FILES=$($GREP '^+++' $* | sed 's/+++ //g')
18 echo This tool is intended to help a human check/review patches. It is very far from
19 echo being free of false positives and negatives, and its output are just hints of what
20 echo may or may not be bad. When you use it and it misses something or detects
21 echo something wrong, fix it and send a patch to the ffmpeg-devel mailing list.
22 echo License: GPL, Author: Michael Niedermayer
24 ERE_PRITYP='(unsigned *|)(char|short|long|int|long *int|short *int|void|float|double|(u|)int(8|16|32|64)_t)'
25 ERE_TYPES='(const|static|av_cold|inline| *)*('$ERE_PRITYP'|[a-zA-Z][a-zA-Z0-9_]*)[* ]{1,}[a-zA-Z][a-zA-Z0-9_]*'
26 ERE_FUNCS="$ERE_TYPES"' *\('
32 $GREP $OPT '^+' $* | $GREP -v ':+++'| $EGREP --color=always -- "$arg"> $TMP && printf "\n$msg\n"
41 $GREP $OPT '^+' $* | $GREP -v ':+++' | $EGREP -v -- "$varg" | $EGREP --color=always -- "$arg" > $TMP && printf "\n$msg\n"
45 hiegrep 'static[^(]*\*[a-zA-Z_]*\[' 'pointer array is not const' $*
46 hiegrep '[[:space:]]$' 'trailing whitespace' $*
47 hiegrep "$(echo x | tr 'x' '\t')" 'tabs' $*
48 #hiegrep ':\+$' 'Empty lines' $*
49 hiegrep ';;' 'double ;' $*
50 hiegrep2 '\b_[a-zA-Z0-9_]{1,}' '__(asm|attribute)([^a-zA-Z0-9]|$)' 'reserved identifer' $*
51 hiegrep '//[-/<\* ]*$' 'empty comment' $*
52 hiegrep '/\*[-<\* ]*\*/' 'empty comment' $*
53 hiegrep 'for *\( *'"$ERE_PRITYP"' ' 'not gcc 2.95 compatible' $*
54 hiegrep '(static|inline|const) *\1[^_a-zA-Z]' 'duplicate word' $*
55 hiegrep 'INIT_VLC_USE_STATIC' 'forbidden ancient vlc type' $*
56 hiegrep '=[-+\*\&] ' 'looks like compound assignment' $*
57 hiegrep2 '/\*\* *[a-zA-Z0-9].*' '\*/' 'Inconsistently formatted doxygen comment' $*
58 hiegrep '; */\*\*[^<]' 'Misformatted doxygen comment' $*
59 hiegrep '//!|/\*!' 'inconsistent doxygen syntax' $*
61 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' $*
63 hiegrep '\+= *1 *;' 'can be simplified to ++' $*
64 hiegrep '-= *1 *;' 'can be simplified to --' $*
65 hiegrep '((!|=)= *(0|NULL)[^0-9a-z]|[^0-9a-z](0|NULL) *(!|=)=)' 'x==0 / x!=0 can be simplified to !x / x' $*
67 $EGREP $OPT '^\+ *(const *|)static' $*| $EGREP --color=always '[^=]= *(0|NULL)[^0-9a-zA-Z]'> $TMP && printf '\nuseless 0 init\n'
69 hiegrep '# *ifdef * (HAVE|CONFIG)_' 'ifdefs that should be #if' $*
71 hiegrep '\b(awnser|cant|dont|wont|doesnt|usefull|successfull|occured|teh|alot|wether|skiped|skiping|heigth|informations|colums|loosy|loosing|ouput|seperate|preceed|upto|paket|posible|unkown|inpossible|dimention|acheive|funtions|overriden|outputing|seperation|initalize|compatibilty|bistream|knwon|unknwon|choosen|additonal|gurantee|availble|wich)\b' 'common typos' $*
73 hiegrep 'av_log\( *NULL' 'Missing context in av_log' $*
74 hiegrep '[^sn]printf' 'Please use av_log' $*
75 hiegrep '\bmalloc' 'Please use av_malloc' $*
76 hiegrep '\) *av_malloc' 'useless casts' $*
77 hiegrep ':\+ *'"$ERE_PRITYP"' *inline' 'non static inline or strangely ordered inline+static' $*
78 hiegrep "$ERE_FUNCS"' *\)' 'missing void' $*
79 hiegrep '(sprintf|strcat|strcpy)' 'Possible security issue, make sure this is safe or use snprintf/av_strl*' $*
80 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' $*
81 hiegrep '#(el|)if *(0|1)' 'useless #if' $*
82 hiegrep 'if *\( *(0|1) *\)' 'useless if()' $*
83 hiegrep '& *[a-zA-Z0-9_]* *\[ *0 *\]' 'useless & [0]' $*
84 hiegrep '(\( *[0-9] *(&&|\|\|)|(&&|\|\|) *[0-9] *\))' 'overriding condition' $*
85 hiegrep '(:\+|,|;)( *|static|\*)*'"$ERE_PRITYP"' *\*( |\*)*(src|source|input|in[^a-z])' 'missing const?' $*
86 hiegrep '(:\+|,|;)( *|static|\*)*'"$ERE_PRITYP"' *(src|source|input|in)([0-9A-Z_][0-9A-Za-z_]*){1,} *\[' 'missing const (test2)?' $*
87 hiegrep ' *static *'"$ERE_FUNCS"'[^)]*\);' 'static prototype, maybe you should reorder your functions' $*
88 hiegrep '@file: *[a-zA-Z0-9_]' 'doxy filetag with filename can in the future cause problems when forgotten during a rename' $*
89 hiegrep '\bassert' 'Please use av_assert0, av_assert1 or av_assert2' $*
91 hiegrep2 '\.long_name *=' 'NULL_IF_CONFIG_SMAL' 'missing NULL_IF_CONFIG_SMAL' $*
92 hiegrep2 '\.pix_fmts *= *\(' 'const' 'missing const for pix_fmts array' $*
93 hiegrep2 '\.sample_fmts *= *\(' 'const' 'missing const for sample_fmts array' $*
94 hiegrep2 '\.supported_framerates *= *\(' 'const' 'missing const for supported_framerates array' $*
95 hiegrep2 '\.channel_layouts *= *\(' 'const' 'missing const for channel_layouts array' $*
97 #$EGREP $OPT '^\+.*const ' $*| $GREP -v 'static'> $TMP && printf '\nnon static const\n'
100 hiegrep2 "$ERE_TYPES" '(static|av_|ff_|typedef|:\+[^a-zA-Z_])' 'Non static with no ff_/av_ prefix' $*
102 hiegrep ':\+[^}#]*else' 'missing } prior to else' $*
103 hiegrep '(if|while|for)\(' 'missing whitespace between keyword and ( (feel free to ignore)' $*
104 hiegrep '(else|do){' 'missing whitespace between keyword and { (feel free to ignore)' $*
105 hiegrep '}(else|while)' 'missing whitespace between } and keyword (feel free to ignore)' $*
107 #FIXME this should print the previous statement maybe
108 hiegrep ':\+ *{ *$' '{ should be on the same line as the related previous statement' $*
112 for i in $($GREP -H '^+.*@param' $*| sed 's/^\([^:]*\):.*@param\(\[.*\]\|\) *\([a-zA-Z0-9_]*\) .*$/\1:\3/') ; do
113 doxpar=$(echo $i | sed 's/^.*:\(.*\)$/\1/')
114 file=$(echo $i | sed 's/^\([^:]*\):.*$/\1/')
115 $GREP " *$doxpar *[),]" $file | $GREP -v '@param' >/dev/null || $GREP --color=always "@param *$doxpar" $file >>$TMP
117 if test -e $TMP ; then
118 printf '\nmismatching doxy params\n'
122 $EGREP -B2 $OPT '^(\+|) *('"$ERE_TYPES"'|# *define)' $* | $EGREP -A2 --color=always '(:|-)\+[^/]*/(\*([^*]|$)|/([^/]|$))' > $TMP && printf "\n Non doxy comments\n"
127 $($EGREP -H '^\+ *'"$ERE_TYPES" $* |\
128 $GREP -v '(' | $EGREP -v '\Wgoto\W' |\
129 xargs -d '\n' -n 1 |\
130 $GREP -o '[* ][* ]*[a-zA-Z][0-9a-zA-Z_]* *[,;=]' |\
131 sed 's/.[* ]*\([a-zA-Z][0-9a-zA-Z_]*\) *[,;=]/\1/') \
133 echo $i | $GREP '^NULL$' && continue
134 $EGREP $i' *(\+|-|\*|/|\||&|%|)=[^=]' $* >/dev/null || echo "possibly never written:"$i >> $TMP
135 $EGREP '(=|\(|return).*'$i'(==|[^=])*$' $* >/dev/null || echo "possibly never read :"$i >> $TMP
136 $EGREP -o $i' *((\+|-|\*|/|\||&|%|)=[^=]|\+\+|--) *(0x|)[0-9]*(;|)' $* |\
137 $EGREP -v $i' *= *(0x|)[0-9]{1,};'>/dev/null || echo "possibly constant :"$i >> $TMP
139 if test -e $TMP ; then
140 printf '\npossibly unused variables\n'
144 $GREP '^+++ .*Changelog' $* >/dev/null || printf "\nMissing changelog entry (ignore if minor change)\n"
146 cat $* | $GREP -v '^-' | tr '\n' '@' | $EGREP --color=always -o '(fprintf|av_log|printf)\([^)]*\)[+ ;@]*\1' >$TMP && printf "\nMergeable calls\n"
147 cat $TMP | tr '@' '\n'
149 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 && printf "\nav_clip / av_clip_uint8 / av_clip_int16 / ...\n"
150 cat $TMP | tr '@' '\n'
152 cat $* | tr '\n' '@' | $EGREP --color=always -o '\+ *if *\( *([A-Za-z0-9_]*) *[<>]=? *([A-Za-z0-9_]*) *\)[ @\\+]*(\1|\2) *= *(\1|\2) *;' >$TMP && printf "\nFFMIN/FFMAX\n"
153 cat $TMP | tr '@' '\n'
155 cat $* | tr '\n' '@' | $EGREP --color=always -o '\+ *if *\( *([A-Za-z0-9_]*) *\)[ @\\+]*av_free(p|) *\( *(&|) *\1[^-.]' >$TMP && printf "\nav_free(NULL) is safe\n"
156 cat $TMP | tr '@' '\n'
158 cat $* | tr '\n' '@' | $EGREP --color=always -o '[^a-zA-Z0-9_]([a-zA-Z0-9_]*) *= *av_malloc *\([^)]*\)[ @;\\+]*memset *\( *\1' >$TMP && printf "\nav_mallocz()\n"
159 cat $TMP | tr '@' '\n'
163 #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 && printf "\nPossibly written 2x before read\n"
164 #cat $TMP | tr '@' '\n'
170 for all demuxers & muxers
171 $EGREP for "avctx->priv_data"
175 arrays fitting in smaller types
176 variables written to twice with no interspaced read
177 memset(block, 0, 6*64*sizeof(int16_t)); -> clear_blocks
178 check existence of long_name in AVCodec
179 check that the patch does not touch codec & (de)muxer layer at the same time ->split
181 write a regression test containing at least a line that triggers each warning once