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authorKarl Berry <karl@freefriends.org>2013-06-07 17:37:00 +0000
committerKarl Berry <karl@freefriends.org>2013-06-07 17:37:00 +0000
commite113e3c4cdeb7ff73ac9928a2032d5fef804a2bd (patch)
treec07d0ea2e6e5e4bd6f61cfb7510753956483e0c3 /Build/source/libs/libpng
parent92dfc6773e3f66004641baa7f06d5064ddf9b9f5 (diff)
svn add --no-auto-props, since there is a literal CR
git-svn-id: svn://tug.org/texlive/trunk@30832 c570f23f-e606-0410-a88d-b1316a301751
Diffstat (limited to 'Build/source/libs/libpng')
-rw-r--r--Build/source/libs/libpng/libpng-1.5.16/scripts/dfn.awk203
1 files changed, 203 insertions, 0 deletions
diff --git a/Build/source/libs/libpng/libpng-1.5.16/scripts/dfn.awk b/Build/source/libs/libpng/libpng-1.5.16/scripts/dfn.awk
new file mode 100644
index 00000000000..89b92d5d9e9
--- /dev/null
+++ b/Build/source/libs/libpng/libpng-1.5.16/scripts/dfn.awk
@@ -0,0 +1,203 @@
+#!/bin/awk -f
+# scripts/dfn.awk - process a .dfn file
+#
+# last changed in libpng version 1.5.14 - February 4, 2013
+#
+# Copyright (c) 2013-2013 Glenn Randers-Pehrson
+#
+# This code is released under the libpng license.
+# For conditions of distribution and use, see the disclaimer
+# and license in png.h
+
+# The output of this script is written to the file given by
+# the variable 'out', which should be set on the command line.
+# Error messages are printed to stdout and if any are printed
+# the script will exit with error code 1.
+
+BEGIN{
+ out="/dev/null" # as a flag
+ out_count=0 # count of output lines
+ err=0 # set if an error occured
+ sort=0 # sort the output
+ array[""]=""
+}
+
+# The output file must be specified before any input:
+NR==1 && out == "/dev/null" {
+ print "out=output.file must be given on the command line"
+ # but continue without setting the error code, this allows the
+ # script to be checked easily
+}
+
+# Output can be sorted; two lines are recognized
+$1 == "PNG_DFN_START_SORT"{
+ sort=0+$2
+ next
+}
+
+$1 ~ /^PNG_DFN_END_SORT/{
+ # Do a very simple, slow, sort; notice that blank lines won't be
+ # output by this
+ for (entry in array) {
+ while (array[entry] != "") {
+ key = entry
+ value = array[key]
+ array[key] = ""
+
+ for (alt in array) {
+ if (array[alt] != "" && alt < key) {
+ array[key] = value
+ value = array[alt]
+ key = alt
+ array[alt] = ""
+ }
+ }
+
+ print value >out
+ }
+ }
+ sort=0
+ next
+}
+
+/^[^"]*PNG_DFN *".*"[^"]*$/{
+ # A definition line, apparently correctly formated, extract the
+ # definition then replace any doubled "" that remain with a single
+ # double quote. Notice that the original doubled double quotes
+ # may have been split by tokenization
+ #
+ # Sometimes GCC splits the PNG_DFN lines, we know this has happened
+ # if the quotes aren't closed and must read another line. In this
+ # case it is essential to reject lines that start '#' because those
+ # are introduced #line directives.
+ orig=$0
+ line=$0
+ lineno=FNR
+ if (lineno == "") lineno=NR
+
+ if (sub(/^[^"]*PNG_DFN *"/,"",line) != 1) {
+ print "line", lineno ": processing failed:"
+ print orig
+ err=1
+ next
+ } else {
+ ++out_count
+ }
+
+ # Now examine quotes within the value:
+ #
+ # @" - delete this and any following spaces
+ # "@ - delete this and any preceding spaces
+ # @' - replace this by a double quote
+ #
+ # This allows macro substitution by the C compiler thus:
+ #
+ # #define first_name John
+ # #define last_name Smith
+ #
+ # PNG_DFN"#define name @'@" first_name "@ @" last_name "@@'"
+ #
+ # Might get C preprocessed to:
+ #
+ # PNG_DFN "#define foo @'@" John "@ @" Smith "@@'"
+ #
+ # Which this script reduces to:
+ #
+ # #define name "John Smith"
+ #
+ while (1) {
+ # While there is an @" remove it and the next "@
+ if (line ~ /@"/) {
+ if (line ~ /@".*"@/) {
+ # Do this special case first to avoid swallowing extra spaces
+ # before or after the @ stuff:
+ if (!sub(/@" *"@/, "", line)) {
+ # Ok, do it in pieces - there has to be a non-space between the
+ # two. NOTE: really weird things happen if a leading @" is
+ # lost - the code will error out below (I believe).
+ if (!sub(/@" */, "", line) || !sub(/ *"@/, "", line)) {
+ print "line", lineno, ": internal error:", orig
+ exit 1
+ }
+ }
+ }
+
+ # There is no matching "@. Assume a split line
+ else while (1) {
+ if (getline nextline) {
+ # If the line starts with '#' it is a preprocesor line directive
+ # from cc -E, skip it:
+ if (nextline !~ /^#/) {
+ line = line " " nextline
+ break
+ }
+ } else {
+ # This is end-of-input - probably a missig "@ on the first line:
+ print "line", lineno ": unbalanced @\" ... \"@ pair"
+ err=1
+ next
+ }
+ }
+
+ # Keep going until all the @" have gone
+ continue
+ }
+
+ # Attempt to remove a trailing " (not preceded by '@') - if this can
+ # be done stop now, if not assume a split line again
+ if (sub(/"[^"]*$/, "", line))
+ break
+
+ # Read another line
+ while (1) {
+ if (getline nextline) {
+ if (nextline !~ /^#/) {
+ line = line " " nextline
+ # Go back to stripping @" "@ pairs
+ break
+ }
+ } else {
+ print "line", lineno ": unterminated PNG_DFN string"
+ err=1
+ next
+ }
+ }
+ }
+
+ # Put any needed double quotes in (at the end, because these would otherwise
+ # interfere with the processing above.)
+ gsub(/@'/,"\"", line)
+
+ # Remove any trailing spaces (not really required, but for
+ # editorial consistency
+ sub(/ *$/, "", line)
+
+ # Remove trailing CR
+ sub(/ $/, "", line)
+
+ if (sort) {
+ if (split(line, parts) < sort) {
+ print "line", lineno ": missing sort field:", line
+ err=1
+ } else
+ array[parts[sort]] = line
+ }
+
+ else
+ print line >out
+ next
+}
+
+/PNG_DFN/{
+ print "line", NR, "incorrectly formated PNG_DFN line:"
+ print $0
+ err = 1
+}
+
+END{
+ if (out_count > 0 || err > 0)
+ exit err
+
+ print "no definition lines found"
+ exit 1
+}