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#!/usr/bin/awk -f
#
# This AWK script scans the opcodes.h file (which is itself generated by
# another awk 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.
#
BEGIN {
print "/* Automatically generated. Do not edit */"
print "/* See the mkopcodec.awk script for details. */"
printf "#if !defined(SQLITE_OMIT_EXPLAIN)"
printf " || defined(VDBE_PROFILE)"
print " || defined(SQLITE_DEBUG)"
print "#if defined(SQLITE_ENABLE_EXPLAIN_COMMENTS) || defined(SQLITE_DEBUG)"
print "# define OpHelp(X) \"\\0\" X"
print "#else"
print "# define OpHelp(X)"
print "#endif"
print "const char *sqlite3OpcodeName(int i){"
print " static const char *const azName[] = { \"?\","
mx = 0
}
/^.define OP_/ {
sub("OP_","",$2)
i = $3+0
label[i] = $2
if( mx<i ) mx = i
for(j=5; j<NF; j++) if( $j=="synopsis:" ) break
if( j<NF ){
j++
x = $j
for(j=j+1; j<NF; j++) x = x " " $j
synopsis[i] = x
}else{
synopsis[i] = ""
}
}
END {
for(i=1; i<=mx; i++){
printf " /* %3d */ %-18s OpHelp(\"%s\"),\n", i, \
"\"" label[i] "\"", synopsis[i]
}
print " };"
print " return azName[i];"
print "}"
print "#endif"
}
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