Subj : src/sbbs3/ansi_parser_test.cppsrc/sbbs3/ansi_parser.cpp ansi_parser.h
To   : Git commit to main/sbbs/master
From : Rob Swindell (on Debian Linux)
Date : Thu Sep 24 2026 21:22:48

https://gitlab.synchro.net/main/sbbs/-/commit/cd63a8361e7f262904965e89
Added Files:
	src/sbbs3/ansi_parser_test.cpp
Modified Files:
	src/sbbs3/ansi_parser.cpp ansi_parser.h ansi_terminal.cpp ansi_terminal.h con_out.cpp terminal.h
Log Message:
Handle bulk control strings without stalling or bloating output state

Three fixes to the terminal output path, none of them specific to any one
control string. They also cover the graphics blob APCs that cterm_lib.js
already writes through console.write().

ANSI_Parser now caps ansi_sequence at 1KB and counts the remainder in
sequence_overflow. A megabyte-scale APC or DCS payload was appended byte
by byte to a std::string that nothing reads except the broken-sequence
warning, which would then have logged the whole payload. The warning
reports the true length and marks a truncated sample. Every append site
goes through one helper, so the cap is an invariant rather than a
property of the string state alone.

Control-string payload no longer enters the terminal line buffer, which
is sized and intended for displayable text.

Terminal gains suspend_output_rate()/restore_output_rate(), for use
around a bulk payload. SyncTERM's rate emulation gates every byte off
the wire, so a 200KB payload at an emulated 2400bps would otherwise take
about eleven minutes. This covers only a rate the BBS set itself; a rate
the user configured in their client is neither visible nor reachable
from here.

ansi_parser_test.c exercises the cap, including that a capped string
still reaches its terminator and that an illegal byte in one is still
detected.

Co-Authored-By: Claude Opus 5 (1M context) <noreply@anthropic.com>
--- SBBSecho 3.37-Linux
 * Origin: Vertrauen - [vert/cvs/bbs].synchro.net (1:103/705)

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