#!/bin/sh
set -eu
base="${TMPDIR-/tmp}/mcpu-cpp-macro-whitespace-$$"
mkdir -p "$base"
trap 'rm -rf "$base"' EXIT HUP INT TERM

cat > "$base/main.c" <<'EOT'
#define MULTI(fmt, ...)                                         \
    do                                                          \
    {                                                           \
        output(fmt __VA_OPT__(,) __VA_ARGS__);                  \
        done();                                                 \
    }                                                           \
    while( 0 )

#define TEXT "left     right"
#define OPS +          + -          > <          <
#define ID(x) x
#define V(...) __VA_OPT__(__VA_ARGS__)

void
f( int x )
{
    MULTI("x=%d", x);
    MULTI("hello");
    ID(alpha        +        beta);
    V(gamma        +        delta);
    const char *s = TEXT;
    OPS
}
EOT

"$MCPU_CPP" --no-config "$base/main.c" -o "$base/out"
sed '/^#/d; /^[[:space:]]*$/d' "$base/out" > "$base/norm"

cat > "$base/expected" <<'EOT'
void
f( int x )
{
    do { output("x=%d" , x); done(); } while( 0 );
    do { output("hello" ); done(); } while( 0 );
    alpha        +        beta;
    gamma        +        delta;
    const char *s = "left     right";
    + + - > < <
}
EOT

diff -u "$base/expected" "$base/norm"

# Macro dumps use the same normalized replacement-list whitespace.
"$MCPU_CPP" --no-config -dM "$base/main.c" > "$base/dump"
grep -Fx '#define MULTI(fmt,...) do { output(fmt __VA_OPT__(,) __VA_ARGS__); done(); } while( 0 )' "$base/dump" >/dev/null
grep -Fx '#define TEXT "left     right"' "$base/dump" >/dev/null
grep -Fx '#define OPS + + - > < <' "$base/dump" >/dev/null
grep -Fx '#define ID(x) x' "$base/dump" >/dev/null
grep -Fx '#define V(...) __VA_OPT__(__VA_ARGS__)' "$base/dump" >/dev/null

# Ordinary source text that is not replacement-list formatting stays untouched.
cat > "$base/plain.c" <<'EOT'
int        plain        =        1;
#define ID(x) x
#define V(...) __VA_OPT__(__VA_ARGS__)
ID(a        +        b)
EOT
"$MCPU_CPP" --no-config "$base/plain.c" -o "$base/plain.out"
sed '/^#/d; /^[[:space:]]*$/d' "$base/plain.out" > "$base/plain.norm"
cat > "$base/plain.expected" <<'EOT'
int        plain        =        1;
a        +        b
EOT
diff -u "$base/plain.expected" "$base/plain.norm"