Add function for shell quoting.

* README.md: Mention <quote.h> and cppawk-quote man page.

* share/cppawk/include/quote.h,
* share/cppawk/include/quote-priv.h: New files.

* testcases-quote: New file.

* cppawk-quote.1: New file.

* runtests: Add testcases-quote.

1 files changed, 36 insertions, 0 deletions

diff --git a/testcases-quote b/testcases-quote
new file mode 100644
index 0000000..272261b
--- /dev/null
+++ b/testcases-quote
@@ -0,0 +1,36 @@
+1:
+$cppawk '
+#include <quote.h>
+
+BEGIN {
+  print q("")
+  print q("abc")
+  print q("abc\\def")
+  print q("'\''foo'\''")
+  print q("\"foo\"")
+  print q("\"fo'\''o\"")
+  print q("abc\ndef")
+  print q("abc*def")
+  print q("abc?def")
+  print q("abc`def")
+  print q("abc`de'\''f")
+  print q("a b c")
+  print q("a\tb\tc")
+  print q("~bob/foo")
+}'
+:
+
+abc
+'abc\def'
+"'foo'"
+'"foo"'
+"\"fo'o\""
+"abc
+def"
+'abc*def'
+'abc?def'
+'abc`def'
+'abc`de'\''f'
+"a b c"
+"a	b	c"
+'~bob/foo'