113 lines
2.6 KiB
Awk
Executable File
113 lines
2.6 KiB
Awk
Executable File
#!/usr/bin/awk -f
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BEGIN {
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FS = ", *"
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print "// Generated by tiff-tables.awk. DO NOT MODIFY."
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print ""
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print "#ifndef TIFF_TABLES_CONSTANTS_ONLY"
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print "#include <stddef.h>"
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print "#include <stdint.h>"
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print ""
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print "struct tiff_value {"
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print "\tconst char *name;"
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print "\tuint16_t value;"
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print "};"
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print ""
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print "struct tiff_entry {"
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print "\tconst char *name;"
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print "\tuint16_t tag;"
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print "\tstruct tiff_value *values;"
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print "};"
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print "#endif"
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}
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{
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# Remember and strip consecutive comments.
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if (match($0, /#/))
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comment[++comments] = substr($0, RSTART + 1)
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else if (!/[[:space:]]/)
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comments = 0
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sub(/#.*$/, "")
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sub(/[[:space:]]*$/, "")
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}
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# Converts arbitrary strings to C identifiers (when running in the C locale).
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function identifize(s) {
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# Regard parenthesised text as comments.
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while (match(s, /[[:space:]]\([^)]+\)/)) {
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comment[++comments] = substr(s, RSTART, RLENGTH)
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s = substr(s, 1, RSTART - 1) substr(s, RSTART + RLENGTH)
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}
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# Capitalize words (toupper is POSIX), removing spaces and dashes between.
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while (match(s, /[-[:space:]]./)) {
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s = substr(s, 1, RSTART - 1) \
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toupper(substr(s, RSTART + 1, 1)) \
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substr(s, RSTART + RLENGTH)
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}
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# Replace any remaining non-identifier characters with underscores.
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gsub(/[^[:alnum:]]/, "_", s)
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return s
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}
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function flushcomments(prefix, i, acc) {
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for (i = 1; i <= comments; i++)
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acc = acc prefix comment[i] "\n"
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comments = 0
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return acc
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}
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function flushvalues() {
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if (values) {
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allvalues = allvalues "enum " fieldname " {\n" values "};\n\n"
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values = ""
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fields = fields "\n\t\t{}\n\t}},"
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} else if (fields) {
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fields = fields " NULL},"
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}
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}
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function flushsection() {
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if (section) {
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flushvalues()
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print "};\n\n" allvalues "#ifndef TIFF_TABLES_CONSTANTS_ONLY"
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print "static struct tiff_entry " \
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sectionsnakecase "_entries[] = {" fields "\n\t{}\n};"
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print "#endif"
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}
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}
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# Section marker
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/^= / {
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flushsection()
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section = identifize(substr($0, 3))
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sectionsnakecase = tolower(substr($0, 3))
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gsub(/[^[:alnum:]]/, "_", sectionsnakecase)
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fields = ""
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allvalues = ""
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print "\n" flushcomments("//") "enum {"
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}
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# Field
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section && /^[^\t=]/ {
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flushvalues()
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fieldname = section "_" identifize($2)
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fields = fields "\n\t{\"" $2 "\", " fieldname ","
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print flushcomments("\t//") "\t" fieldname " = " $1 ","
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}
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# Value
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section && /^\t/ {
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sub(/^\t*/, "")
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valuename = fieldname "_" identifize($2)
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if (!values)
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fields = fields " (struct tiff_value[]) {"
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values = values flushcomments("\t//") "\t" valuename " = " $1 ",\n"
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fields = fields "\n\t\t{\"" $2 "\", " valuename "},"
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}
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END {
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flushsection()
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}
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