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#!/bin/sh
#
# This shell script scans the opcodes.h file (which is itself generated by
# another shell script) and uses the information gleaned to create the
# opcodes.c source file.
#
# Opcodes.c contains strings which are the symbolic names for the various
# opcodes used by the VDBE. These strings are used when disassembling a
# VDBE program during tracing or as a result of the EXPLAIN keyword.
printf '%s\n' "/* Automatically generated. Do not edit */"
printf '%s\n' "/* See the tool/mkopcodec.sh script for details. */"
printf '%s\n' "#include \"sqlInt.h\""
printf '%s\n' "#if defined(SQL_ENABLE_EXPLAIN_COMMENTS) || defined(SQL_DEBUG)"
printf '%s\n' "# define OpHelp(X) \"\\0\" X"
printf '%s\n' "#else"
printf '%s\n' "# define OpHelp(X)"
printf '%s\n' "#endif"
printf '%s\n' "const char *sqlOpcodeName(int i){"
printf '%s\n' " static const char *const azName[] = {"
mx=0
set -eu # Strict shell (w/o -x and -o pipefail)
set -f # disable pathname expansion
newline="$(printf '\n')"
IFS="$newline"
while read line; do
case "$line" in
'#define OP_'*)
IFS=" "
set -- $line
IFS="$newline"
name="${2#OP_}"
i="$3"
eval "ARRAY_label_$i=\"$name\""
if [ "$mx" -lt "$i" ]; then
mx="$i"
fi
case "$line" in
*'synopsis: '*' */'*)
x=${line#*'synopsis: '}
x=${x%' */'*}
# trim
while true; do
case "$x" in
' '*) x=${x# } ;;
*' ') x=${x% } ;;
*) break ;;
esac
done
eval "ARRAY_synopsis_$i=\"$x\""
;;
*)
eval "ARRAY_synopsis_$i=\"\""
;;
esac
;;
esac
done < "$1"
i=0
while [ "$i" -le "$mx" ]; do
eval "label=\"\$ARRAY_label_$i\""
eval "synopsis=\"\$ARRAY_synopsis_$i\""
printf ' /* %3d */ %-18s OpHelp("%s"),\n' "$i" "\"$label\"" "$synopsis"
i=$((i + 1))
done
printf '%s\n' " };"
printf '%s\n' " return azName[i];"
printf '%s\n' "}"
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