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, 2 insertions, 2 deletions

diff --git a/src/input.c b/src/input.c
index 9fee179..2f0cd5c 100644
--- a/src/input.c
+++ b/src/input.c
@@ -53,7 +53,7 @@ static inline void sb_u32(struct seqbuf *sb, uint32_t val)
 static inline void sb_utf8(struct seqbuf *sb, uint32_t cp)
 {
     char tmp[8];
-    size_t n = (size_t)utf8_encode(cp, tmp);
+    size_t n = (size_t)term_utf8_encode(cp, tmp);
     sb_bytes(sb, tmp, n);
 }
 
@@ -695,7 +695,7 @@ struct term_input_result term_input_encode_paste(const struct term_modes *m,
             continue;
         }
         uint32_t cp;
-        int n = utf8_decode_one(text + i, len - i, &cp);
+        int n = term_utf8_decode_one(text + i, len - i, &cp);
         if (!n) { i++; continue; }
         if (cp >= 0xa0 && !is_direction_format(cp)) {
             sb_bytes(&sb, text + i, (size_t)n);