pidgin/pidgin

Cleanup some GG utility functions

2020-09-21, Elliott Sales de Andrade
222423055d93
Cleanup some GG utility functions

* Remove unused `ggp_int64_compare`.
* Inline `ggp_list_copy_to_slist_deep`.
It's only used once.
* Rewrite `ggp_message_format_to_gg` using `GString`.
This may not be the best, but it's better than the implementation with `GList`.
* Use a string list pref to save gg server history.
This removes the need for gg to do the conversion to/from plain strings itself,
and thus removes the need for the `ggp_str*_list` functions.
* Embed `ggp_list_truncate` directly where used, and in simplified form.
* Embed `ggp_password_validate` at its caller.
There's only one use of it.

Testing Done:
Compile only.

Reviewed at https://reviews.imfreedom.org/r/117/
/* Purple is the legal property of its developers, whose names are too numerous
* to list here. Please refer to the COPYRIGHT file distributed with this
* source distribution.
*
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#include "internal.h"
#include "version.h"
const guint purple_major_version = PURPLE_MAJOR_VERSION;
const guint purple_minor_version = PURPLE_MINOR_VERSION;
const guint purple_micro_version = PURPLE_MICRO_VERSION;
const char *purple_version_check(guint required_major, guint required_minor, guint required_micro)
{
if (required_major > PURPLE_MAJOR_VERSION)
return "libpurple version too old (major mismatch)";
if (required_major < PURPLE_MAJOR_VERSION)
return "libpurple version too new (major mismatch)";
if (required_minor > PURPLE_MINOR_VERSION)
return "libpurple version too old (minor mismatch)";
if ((required_minor == PURPLE_MINOR_VERSION) && (required_micro > PURPLE_MICRO_VERSION))
return "libpurple version too old (micro mismatch)";
return NULL;
}