gbranden pushed a commit to branch master
in repository groff.
commit b4532353dcb95a31404e803064c1e6674f2b2f94
Author: G. Branden Robinson <[email protected]>
AuthorDate: Tue Feb 4 05:16:23 2025 -0600
[troff]: Refactor and annotate.
* src/roff/troff/input.cpp (define_character): Declare variables closer
to their point of use. Reorder conditional branches to put the more
common case first. Use C++ `static_cast` operator instead of C-style
type cast.
---
ChangeLog | 7 +++++++
src/roff/troff/input.cpp | 13 ++++++++-----
2 files changed, 15 insertions(+), 5 deletions(-)
diff --git a/ChangeLog b/ChangeLog
index 20936512b..f1fcffd2f 100644
--- a/ChangeLog
+++ b/ChangeLog
@@ -1,3 +1,10 @@
+2025-02-04 G. Branden Robinson <[email protected]>
+
+ * src/roff/troff/input.cpp (define_character): Refactor and
+ annotate. Declare variables closer to their point of use.
+ Reorder conditional branches to put the more common case first.
+ Use C++ `static_cast` operator instead of C-style type cast.
+
2025-02-04 G. Branden Robinson <[email protected]>
* src/roff/troff/input.cpp: Refactor.
diff --git a/src/roff/troff/input.cpp b/src/roff/troff/input.cpp
index 32b158ffb..f9406fd50 100644
--- a/src/roff/troff/input.cpp
+++ b/src/roff/troff/input.cpp
@@ -4597,8 +4597,6 @@ static const char *character_mode_description(char_mode
mode)
void define_character(char_mode mode, const char *font_name)
{
const char *modestr = character_mode_description(mode);
- node *n = 0 /* nullptr */;
- int c;
tok.skip();
charinfo *ci = tok.get_char(true /* required */);
if (0 /* nullptr */ == ci) {
@@ -4613,6 +4611,8 @@ void define_character(char_mode mode, const char
*font_name)
ci = get_charinfo(symbol(s.contents()));
}
tok.next();
+ int c;
+ node *n = 0 /* nullptr */;
if (tok.is_newline())
c = '\n';
else if (tok.is_tab())
@@ -4631,13 +4631,16 @@ void define_character(char_mode mode, const char
*font_name)
if (c == '"')
c = get_copy(&n);
macro *m = new macro;
+ // Construct a macro from input characters; if the input character
+ // code is 0, we've read a node--append that.
while (c != '\n' && c != EOF) {
- if (c == 0)
- m->append(n);
+ if (c != 0)
+ m->append(static_cast<unsigned char>(c));
else
- m->append((unsigned char) c);
+ m->append(n);
c = get_copy(&n);
}
+ // Assign the macro to the character, discarding any previous macro.
m = ci->set_macro(m, mode);
if (m)
delete m;
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