mirror of https://codeberg.org/h3xx/optipdf
Output number of freed bytes instead of success
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optipdf
78
optipdf
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@ -18,6 +18,47 @@ file_size() {
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2>/dev/null
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}
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# produces a human-readable size from the byte count passed to it
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hr_size() (
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declare -i BYTES=$1
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#UNITS=(B KB MB GB TB PB EB ZB YB) # shell math can only go so far...
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UNITS=(B KB MB GB TB)
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FACT=1024
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THRESH=9/10
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DECIMALS=1
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DECIMALS_FACTOR=$(( 10 ** DECIMALS ))
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# cycle through units from largest to smallest, exiting when it finds the
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# largest applicable unit
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for (( EXP = ${#UNITS[@]} - 1; EXP > -1; --EXP )); do
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# check if the unit is close enough to the unit's size, within the
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# threshold
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if [[ $BYTES -gt $((FACT ** EXP * $THRESH)) ]]; then
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# we found the applicable unit
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# must multiply by a factor of 10 here to not truncate
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# the given number of decimal places after the point
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HR_VAL=$(( BYTES * DECIMALS_FACTOR / FACT ** EXP ))
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# put the decimal point in
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if [[ $DECIMALS -gt 0 ]]; then
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HR_VAL=$(( HR_VAL / DECIMALS_FACTOR )).$(( HR_VAL % DECIMALS_FACTOR ))
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fi
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HR_UNIT=${UNITS[$EXP]}
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break
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fi
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done
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if [[ -z $HR_UNIT ]]; then
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HR_VAL=$BYTES
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HR_UNIT=${UNITS[0]}
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fi
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printf '%g %s\n' "$HR_VAL" "$HR_UNIT"
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)
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# copies $2 over to $1 if $2 is smaller than $1
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use_smaller() {
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# if `$TEMP' isn't empty and it's of a smaller size than `$FILE',
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@ -64,19 +105,11 @@ use_smaller() {
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"$TEMP" \
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"$FILE"
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local ERR=$?
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case "$ERR" in
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'0')
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printf 'Optimized "%s"\n' \
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"$FILE" \
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>&2
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;;
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*)
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printf 'Failed to optimize "%s"!\n' \
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"$FILE" \
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>&2
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;;
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esac
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if [[ $? -ne 0 ]]; then
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printf 'Failed to optimize "%s"!\n' \
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"$FILE" \
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>&2
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fi
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fi
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@ -90,16 +123,33 @@ TEMP1=$(mktemp -t "${0##*/}.XXXXXX")
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TEMP_FILES+=("$TEMP0" "$TEMP0")
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ERRORS=0
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FREED_TOTAL=0
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for FILE; do
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rm -f -- "$TEMP0" "$TEMP1"
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if !
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BEGIN_FILESIZE=$(file_size "$FILE")
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if
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qpdf --stream-data=uncompress -- "$FILE" "$TEMP0" &&
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qpdf --stream-data=compress -- "$TEMP0" "$TEMP1" &&
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use_smaller "$FILE" "$TEMP1"; then
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END_FILESIZE=$(file_size "$FILE")
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FREED=$(( BEGIN_FILESIZE - END_FILESIZE ))
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FREED_HR=$(hr_size "$FREED")
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(( FREED_TOTAL += FREED ))
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printf '%s: freed %d bytes (%s)\n' \
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"$FILE" \
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"$FREED" \
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"$FREED_HR"
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else
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(( ++ERRORS ))
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fi
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done
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FREED_TOTAL_HR=$(hr_size "$FREED_TOTAL")
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printf 'all: freed %d bytes (%s)\n' "$FREED_TOTAL" "$FREED_TOTAL_HR"
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if [[ $ERRORS -gt 0 ]]; then
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exit 1
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fi
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