Modernize the /export command implementation by adopting GLib-based
patterns for string manipulation and file handling.
* Replace _writecsv with _append_csv_escaped to efficiently handle CSV
quote doubling directly within a GString buffer
* Refactor cmd_export to build the CSV content in memory using GString,
minimizing system calls
* Use g_file_set_contents for atomic writing
* Cache strlen() result
* Check for malloc() failure to prevent null pointer dereference
* Ensure the output buffer is null-terminated for safe use with cons_show()
* Simplify the quote escaping logic for better readability.
Make get_random_string() return a gchar*.
This is part of the effort to migrate string declarations and
allocations from char to gchar, replacing standard C allocators
(malloc/calloc/strdup) with their glib equivalents
(g_malloc/g_new0/g_strdup).
The primary goal is to prevent mismatched allocator bugs. While char and
gchar are binary compatible, mixing their respective deallocators is
dangerous:
* Freeing malloc'd memory with g_free() (or vice versa) can lead to
memory corruption, double-frees, or crashes.
* This is seems to be the case especiall on non Linux platforms or when
using hardened memory allocators where the GLib slice allocator or
wrappers may differ from the system heap.
By standardizing on gchar, we ensure that our automatic cleanup macros
(like auto_gchar) always invoke the correct deallocator (g_free).
Migrate structure allocations from calloc to glibs g_new0 macro to
improve type safety and memory robustness.
* Type Safety: The macro takes the type name directly, ensuring the
allocated size always matches the pointer type.
* Static Analysis: It guarantees a non-NULL return by aborting on
failure, which silences -fanalyzer warnings regarding potential NULL
pointer dereferences.
* Readability: Removes redundant sizeof() calls and is the glib way
Enable gccs static analyzer to detect memory bugs at compile-time. This
validates our __attribute__((__cleanup__)) macros and improves security
when parsing external XMPP data with zero runtime overhead.
Add security hardening via _FORTIFY_SOURCE=2 and switch to -Og to
provide the necessary optimization for these checks while remaining
debugger friendly.
The goal is to catch many buffer overflows and format string errors
at compile-time or runtime.
-Og may occasionally optimize out very short-lived
local variables, making them invisible in the debugger.
So i'm not sure this is a very good idea. But I hope that we will find
bugs earlier and don't even need to debug that often. We might revert
this change later though in case we run into problems too often.
I'm not aware of any other downsides.
Enable stack protection to detect buffer overflows and harden the binary.
This flag adds a canary to stack frames, causing the
program to terminate immediately if stack corruption is detected.
This helps identify memory safety bugs earlier during development by
turning silent corruption into an immediate crash, and provides
protection against stack-smashing exploits at runtime with negligible
performance overhead.
We don't add this generally because we wan't distributions/users to
decide if they want it. But it can help us find problems early on during
development.
Also refactor the function so we pass it the current version
and don't rely on the define inside of it.
This function only allows version format in the style of "x.y.z".
Optimize prof_occurrences by using pointer arithmetic and
g_utf8_next_char instead of calls to g_utf8_offset_to_pointer.
Improve list construction efficiency in prof_occurrences by
using g_slist_prepend and g_slist_reverse instead of appends.
Also fix a slight oversight that could lead to trouble:
When empty search strings (e.g. empty nicks) are passed
it caused matches at every position.
Update the test case to test for empty nicks.
See last commit with comment regarding cons_show().
In this test here we can see that if we pass NULL cons_show() isn't
called. Making it a bit different that other invalid test cases.
It seems like we didn't even check whether the operations succeed or
not.
* `clear_empty()`
Add assertion to confirm a newly created autocomplete object is empty.
* `find_after_create()`:
Add assertion to ensure `autocomplete_complete()` returns NULL when no
entries are present in th object.
