[llvm] [llvm-strings] Add --encoding={s,S,utf8} option (PR #221794)

[James Henderson via llvm-commits]

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@@ -0,0 +1,71 @@
+# Show that llvm-strings uses the specified encoding.
+RUN: echo a > %t
+RUN: echo ab >> %t
+RUN: echo abc >> %t
+RUN: echo abcd >> %t
+# UTF-8 encoding of U+200A HAIR SPACE (printable)
+RUN: printf 'abcd\342\200\212\n' >> %t
+# UTF-8 encoding of U+200B ZERO WIDTH SPACE (non-printable)
+RUN: printf 'abcd\342\200\212\342\200\213\n' >> %t
+
+# Check that long form options work.
+RUN: llvm-strings --encoding s %t | FileCheck --check-prefixes CHECK,CHECK-ASCII --strict-whitespace --match-full-lines %s
+RUN: llvm-strings --encoding S %t | FileCheck --check-prefixes CHECK,CHECK-LOCALE --strict-whitespace --match-full-lines %s
+RUN: llvm-strings --encoding utf8 %t | FileCheck --check-prefixes CHECK,CHECK-UTF8 --strict-whitespace --match-full-lines %s
+
+# Check that short form options work.
+RUN: llvm-strings -e s %t | FileCheck --check-prefixes CHECK,CHECK-ASCII --strict-whitespace --match-full-lines %s
+RUN: llvm-strings -e S %t | FileCheck --check-prefixes CHECK,CHECK-LOCALE --strict-whitespace --match-full-lines %s
+RUN: llvm-strings -e utf8 %t | FileCheck --check-prefixes CHECK,CHECK-UTF8 --strict-whitespace --match-full-lines %s
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jh7370 wrote:

It might be worth using `cmp` for these cases too (comparing versus long-form)?

https://github.com/llvm/llvm-project/pull/221794