Rework backslash substitutions in awk scripts.

[dxcommon.git] / scripts / gen-strtab.awk

diff --git a/scripts/gen-strtab.awk b/scripts/gen-strtab.awk
index 2265bb5d42d654aca2ea66aa4ad6d7a8987d139d..c5b02c6d3840fef82f2bbaa7a9353312b986c95c 100755 (executable)
--- a/scripts/gen-strtab.awk
+++ b/scripts/gen-strtab.awk
@@ -80,6 +80,10 @@ END {
 }
 
 BEGIN {
+  # Check if "\\\\" in substitutions gives just one backslash.
+  bs = "x"; sub(/x/, "\\\\", bs);
+  bs = (length(bs) == 1 ? "\\\\" : "\\");
+
   opts["zero"] = 1
   opts["macro"] = 0
   collected = ident = ""
@@ -157,7 +161,7 @@ END {
 
   for (i = 0; i < count; i++) {
     s = sorted_strings[i]
-    gsub(/\\\\/, "\2\2", s)
+    gsub(/\\\\/, "\2", s)
     if ((n = index(strtab "\1", s "\1")) > 0) {
       offsets[sorted_strings[i]] = real_length(substr(strtab, 1, n-1));
       if (!(sorted_strings[i] in nol10n))
@@ -173,7 +177,7 @@ END {
     }
   }
 
-  gsub(/\2/, "\\", strtab);
+  gsub("\2", bs bs, strtab);
   n = split(strtab, split_strtab, "\1");
   for (i = 1; i <= n; i++) {
     printf("\t%4s ", i > !!opts["zero"] ? "\"\\0\"" : "");
@@ -206,9 +210,10 @@ END {
 # strings[ident] = val.
 function finish_string_input(strings, ident, val, n, tmpval)
 {
-  gsub(/\\\\/, "\1\1", val)
-  val = val (endline > startline ? "\n" : "")
-  gsub(/\\\n/, "", val)
+  gsub(/\\\\/, "\1", val);
+  if (endline > startline)
+    val = val "\n";
+  gsub(/\\\n/, "", val);
 
   tmpval = ""
   while ((n = match(val, /\\[^abtnvfr]/)) > 0) {
@@ -218,10 +223,10 @@ function finish_string_input(strings, ident, val, n, tmpval)
   tmpval = tmpval val
 
   # Escape special characters
-  gsub(/"/, "\\\"", tmpval)
-  gsub(/\t/, "\\t", tmpval)
-  gsub(/\n/, "\\n", tmpval)
-  gsub(/\1/, "\\", tmpval)
+  gsub(/"/,  bs"\"", tmpval)
+  gsub(/\t/, bs"t", tmpval)
+  gsub(/\n/, bs"n", tmpval)
+  gsub("\1", bs bs, tmpval)
 
   strings[ident] = tmpval
   if (!current_l10n) {
@@ -232,7 +237,7 @@ function finish_string_input(strings, ident, val, n, tmpval)
 function real_length(s, t)
 {
   t = length(s)
-  return t - gsub(/\\.|\2\2/, "&", s)
+  return t - gsub(/\\./, "&", s)
 }
 
 # bucketsort(dst, src)