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-rwxr-xr-xsupport/scripts/expunge-gconv-modules59
1 files changed, 59 insertions, 0 deletions
diff --git a/support/scripts/expunge-gconv-modules b/support/scripts/expunge-gconv-modules
new file mode 100755
index 0000000000..a77b063cac
--- /dev/null
+++ b/support/scripts/expunge-gconv-modules
@@ -0,0 +1,59 @@
+#!/bin/bash
+
+# This script is used to generate a gconv-modules file that takes into
+# account only the gconv modules installed by Buildroot. It receives
+# on its standard input the original complete gconv-modules file from
+# the toolchain, and as arguments the list of gconv modules that were
+# actually installed, and writes on its standard output the new
+# gconv-modules file.
+
+# The format of gconv-modules is precisely documented in the
+# file itself. It consists of two different directives:
+# module FROMSET TOSET FILENAME COST
+# alias ALIAS REALNAME
+# and that's what this script parses and generates.
+#
+# There are two kinds of 'module' directives:
+# - the first defines conversion of a charset to/from INTERNAL representation
+# - the second defines conversion of a charset to/from another charset
+# we handle each with slightly different code, since the second never has
+# associated aliases.
+
+gawk -v files="${1}" '
+$1 == "alias" {
+ aliases[$3] = aliases[$3] " " $2;
+}
+$1 == "module" && $2 != "INTERNAL" && $3 == "INTERNAL" {
+ file2internals[$4] = file2internals[$4] " " $2;
+ mod2cost[$2] = $5;
+}
+$1 == "module" && $2 != "INTERNAL" && $3 != "INTERNAL" {
+ file2cset[$4] = file2cset[$4] " " $2 ":" $3;
+ mod2cost[$2] = $5;
+}
+
+END {
+ nb_files = split(files, all_files);
+ for(f = 1; f <= nb_files; f++) {
+ file = all_files[f];
+ printf("# Modules and aliases for: %s\n", file);
+ nb_mods = split(file2internals[file], mods);
+ for(i = 1; i <= nb_mods; i++) {
+ nb_aliases = split(aliases[mods[i]], mod_aliases);
+ for(j = 1; j <= nb_aliases; j++) {
+ printf("alias\t%s\t%s\n", mod_aliases[j], mods[i]);
+ }
+ printf("module\t%s\t%s\t%s\t%d\n", mods[i], "INTERNAL", file, mod2cost[mods[i]]);
+ printf("module\t%s\t%s\t%s\t%d\n", "INTERNAL", mods[i], file, mod2cost[mods[i]]);
+ printf("\n" );
+ }
+ printf("%s", nb_mods != 0 ? "\n" : "");
+ nb_csets = split(file2cset[file], csets);
+ for(i = 1; i <= nb_csets; i++) {
+ split(csets[i], cs, ":");
+ printf("module\t%s\t%s\t%s\t%d\n", cs[1], cs[2], file, mod2cost[cs[1]]);
+ }
+ printf("%s", nb_csets != 0 ? "\n\n" : "");
+ }
+}
+'