Keep installed headers from shadowing or polluting host names

The pkg-config file put include/term on the host's include path, so
ncurses' term.h could be picked up in place of ours. Hosts now write
<term/term.h> and the package adds only its include directory.

The installed Unicode API had unprefixed names that collide with host
symbols and macros. Rename them: term_ for functions, types, and static
tables, TERM_ for macros and include guards. unicode_data.inc and
tools/generate_unicode.py are renamed to match. The generator's inputs
here are Unicode 15.1 and the checked-in table is 18.0.0, so the table
data was not regenerated. Only the declarations were checked against
the generator.

utf8.h casts the malloc result so it compiles as C++.

header_test.sh now includes <term/term.h> with only include/ on the path.
It also checks that a host which defines unicode_width, UTF8_ACCEPT,
GRAPHEME_MAX_LEN, in_ranges, and similar names compiles with the Unicode
headers as C11 and C++, in both declaration orders.

Co-Authored-By: Claude Haiku 5.5 <noreply@anthropic.com>

1 files changed, 6 insertions, 6 deletions

diff --git a/tests/hist_test.c b/tests/hist_test.c
index d772c5a..691ae3c 100644
--- a/tests/hist_test.c
+++ b/tests/hist_test.c
@@ -129,9 +129,9 @@ static void test_clusters_roundtrip(void)
 
     struct cell out[2];
     assert(term_hist_decode_segment(&h, 0, 0, 2, out, g) == 2);
-    assert(grapheme_is_handle(out[0].c));
-    uint32_t got[GRAPHEME_MAX_LEN];
-    assert(term_gstore_expand(g, out[0].c, got, GRAPHEME_MAX_LEN) == 3);
+    assert(term_grapheme_is_handle(out[0].c));
+    uint32_t got[TERM_GRAPHEME_MAX_LEN];
+    assert(term_gstore_expand(g, out[0].c, got, TERM_GRAPHEME_MAX_LEN) == 3);
     assert(got[0] == cps[0] && got[1] == cps[1] && got[2] == cps[2]);
     assert(out[1].c == 'X');
 
@@ -623,9 +623,9 @@ static void test_fuzz_rows(void)
                 continue;
             }
             assert(a->fg == b->fg && a->flags == b->flags);
-            if (grapheme_is_handle(a->c)) {
-                uint32_t got[GRAPHEME_MAX_LEN];
-                assert(term_gstore_expand(g, b->c, got, GRAPHEME_MAX_LEN) == 2 && got[1] == 0x0301);
+            if (term_grapheme_is_handle(a->c)) {
+                uint32_t got[TERM_GRAPHEME_MAX_LEN];
+                assert(term_gstore_expand(g, b->c, got, TERM_GRAPHEME_MAX_LEN) == 2 && got[1] == 0x0301);
             } else {
                 assert(a->c == b->c);
             }