gbranden pushed a commit to branch master
in repository groff.
commit ffcca436ace531354b1e06bf5a08f51c1f15be76
Author: G. Branden Robinson <[email protected]>
AuthorDate: Sat Mar 15 04:26:25 2025 -0500
[libgroff]: Support object dumping in JSON (1/3).
* src/include/json-encode.h:
* src/libs/libgroff/json_encode.cpp: Add new files.
* src/libs/libgroff/libgroff.am (libgroff_a_SOURCES): Add
"json_encode.cpp".
---
ChangeLog | 10 +++++
src/include/json-encode.h | 29 ++++++++++++++
src/libs/libgroff/json_encode.cpp | 80 +++++++++++++++++++++++++++++++++++++++
src/libs/libgroff/libgroff.am | 3 +-
4 files changed, 121 insertions(+), 1 deletion(-)
diff --git a/ChangeLog b/ChangeLog
index 516628973..3225d05ea 100644
--- a/ChangeLog
+++ b/ChangeLog
@@ -1,3 +1,13 @@
+2025-03-15 G. Branden Robinson <[email protected]>
+
+ [libgroff]: Support dumping of some object types in JSON format.
+
+ * src/include/json-encode.h:
+ * src/libs/libgroff/json_encode.cpp: Add new files.
+
+ * src/libs/libgroff/libgroff.am (libgroff_a_SOURCES): Add
+ "json_encode.cpp".
+
2025-03-10 G. Branden Robinson <[email protected]>
Further rationalize header file inclusions.
diff --git a/src/include/json-encode.h b/src/include/json-encode.h
new file mode 100644
index 000000000..98bcbcf56
--- /dev/null
+++ b/src/include/json-encode.h
@@ -0,0 +1,29 @@
+/* Copyright (C) 2025 G. Branden Robinson
+
+This file is part of groff.
+
+groff is free software; you can redistribute it and/or modify it under
+the terms of the GNU General Public License as published by the Free
+Software Foundation, either version 3 of the License, or
+(at your option) any later version.
+
+groff is distributed in the hope that it will be useful, but WITHOUT ANY
+WARRANTY; without even the implied warranty of MERCHANTABILITY or
+FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
+for more details.
+
+You should have received a copy of the GNU General Public License
+along with this program. If not, see <http://www.gnu.org/licenses/>. */
+
+struct json_char {
+ char len;
+ char buf[7]; // '\uXXXX' + '\0'
+};
+
+json_char json_encode_char(unsigned char);
+
+// Local Variables:
+// fill-column: 72
+// mode: C++
+// End:
+// vim: set cindent noexpandtab shiftwidth=2 textwidth=72:
diff --git a/src/libs/libgroff/json_encode.cpp
b/src/libs/libgroff/json_encode.cpp
new file mode 100644
index 000000000..a3bc47de7
--- /dev/null
+++ b/src/libs/libgroff/json_encode.cpp
@@ -0,0 +1,80 @@
+/* Copyright (C) 2025 G. Branden Robinson
+
+This file is part of groff.
+
+groff is free software; you can redistribute it and/or modify it under
+the terms of the GNU General Public License as published by the Free
+Software Foundation, either version 3 of the License, or
+(at your option) any later version.
+
+groff is distributed in the hope that it will be useful, but WITHOUT ANY
+WARRANTY; without even the implied warranty of MERCHANTABILITY or
+FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
+for more details.
+
+You should have received a copy of the GNU General Public License
+along with this program. If not, see <http://www.gnu.org/licenses/>. */
+
+#ifdef HAVE_CONFIG_H
+#include <config.h>
+#endif
+
+#include <assert.h>
+#include <stdio.h> // snprintf()
+
+#include "cset.h" // csprint()
+#include "json-encode.h" // json_char
+
+// Return pointer to mutable buffer representing character `c` as a JSON
+// string. The caller must free the buffer.
+json_char json_encode_char(unsigned char c)
+{
+ assert(c < 256);
+ json_char jc;
+ // Handle the most common cases first.
+ if (csprint(c)) {
+ jc.len = 1;
+ jc.buf[0] = c;
+ }
+ else if (('"' == c) || ('\\' == c) || ('/' == c)) {
+ jc.len = 2;
+ jc.buf[0] = '\\';
+ jc.buf[1] = c;
+ }
+ else if ('\b' == c) {
+ jc.len = 2;
+ jc.buf[0] = '\\';
+ jc.buf[1] = 'b';
+ }
+ else if ('\t' == c) {
+ jc.len = 2;
+ jc.buf[0] = '\\';
+ jc.buf[1] = 't';
+ }
+ else if ('\n' == c) {
+ jc.len = 2;
+ jc.buf[0] = '\\';
+ jc.buf[1] = 'n';
+ }
+ else if ('\f' == c) {
+ jc.len = 2;
+ jc.buf[0] = '\\';
+ jc.buf[1] = 'f';
+ }
+ else if ('\r' == c) {
+ jc.len = 2;
+ jc.buf[0] = '\\';
+ jc.buf[1] = 'r';
+ }
+ else {
+ jc.len = 6;
+ (void) snprintf(jc.buf, sizeof jc.buf, "\\u%04X", c);
+ }
+ return jc;
+}
+
+// Local Variables:
+// fill-column: 72
+// mode: C++
+// End:
+// vim: set cindent noexpandtab shiftwidth=2 textwidth=72:
diff --git a/src/libs/libgroff/libgroff.am b/src/libs/libgroff/libgroff.am
index 36b83d5ee..f0c53a3f0 100644
--- a/src/libs/libgroff/libgroff.am
+++ b/src/libs/libgroff/libgroff.am
@@ -1,4 +1,4 @@
-# Copyright (C) 2014-2024 Free Software Foundation, Inc.
+# Copyright (C) 2014-2025 Free Software Foundation, Inc.
#
# This file is part of groff.
#
@@ -44,6 +44,7 @@ libgroff_a_SOURCES = \
src/libs/libgroff/iftoa.c \
src/libs/libgroff/invalid.cpp \
src/libs/libgroff/itoa.c \
+ src/libs/libgroff/json_encode.cpp \
src/libs/libgroff/lf.cpp \
src/libs/libgroff/lineno.cpp \
src/libs/libgroff/localcharset.c \
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