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Python: Fix overflow and code-cleanup

This commit is contained in:
TingPing 2014-12-30 14:42:48 -05:00
parent 6ef7298870
commit 448cc962cd
1 changed files with 27 additions and 62 deletions
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89
plugins/python/python.c
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@ -802,9 +802,7 @@ Callback_ThreadTimer(void *userdata)
/* We keep this information global, so we can reset it when the /* We keep this information global, so we can reset it when the
* deinit function is called. */ * deinit function is called. */
/* XXX This should be somehow bound to the printing context. */ /* XXX This should be somehow bound to the printing context. */
static char *xchatout_buffer = NULL; static GString *xchatout_buffer = NULL;
static int xchatout_buffer_size = 0;
static int xchatout_buffer_pos = 0;
static PyObject * static PyObject *
XChatOut_New() XChatOut_New()
@ -828,73 +826,41 @@ XChatOut_dealloc(PyObject *self)
static PyObject * static PyObject *
XChatOut_write(PyObject *self, PyObject *args) XChatOut_write(PyObject *self, PyObject *args)
{ {
int new_buffer_pos, data_size, print_limit, add_space; gboolean add_space;
char *data, *pos; char *data, *pos;
if (!PyArg_ParseTuple(args, "s#:write", &data, &data_size))
if (!PyArg_ParseTuple(args, "s:write", &data))
return NULL; return NULL;
if (!data_size) { if (!data || !*data) {
Py_INCREF(Py_None); Py_INCREF(Py_None);
return Py_None; return Py_None;
} }
BEGIN_XCHAT_CALLS(RESTORE_CONTEXT|ALLOW_THREADS); BEGIN_XCHAT_CALLS(RESTORE_CONTEXT|ALLOW_THREADS);
if (((XChatOutObject *)self)->softspace) { if (((XChatOutObject *)self)->softspace) {
add_space = 1; add_space = TRUE;
((XChatOutObject *)self)->softspace = 0; ((XChatOutObject *)self)->softspace = 0;
} else { } else {
add_space = 0; add_space = FALSE;
} }
if (xchatout_buffer_size-xchatout_buffer_pos < data_size+add_space) {
char *new_buffer; g_string_append (xchatout_buffer, data);
/* This buffer grows whenever needed, and does not
* shrink. If we ever implement unloading of the /* If not end of line add space to continue buffer later */
* python interface, we must find some way to free if (add_space && xchatout_buffer->str[xchatout_buffer->len - 1] != '\n')
* this buffer as well. */ {
xchatout_buffer_size += data_size*2+16; g_string_append_c (xchatout_buffer, ' ');
new_buffer = g_realloc(xchatout_buffer, xchatout_buffer_size); }
if (new_buffer == NULL) {
hexchat_print(ph, "Not enough memory to print"); /* If there is an end of line print up to that */
/* The system is out of resources. Let's help. */ if ((pos = strrchr (xchatout_buffer->str, '\n')))
g_free(xchatout_buffer); {
xchatout_buffer = NULL; *pos = '\0';
xchatout_buffer_size = 0; hexchat_print (ph, xchatout_buffer->str);
xchatout_buffer_pos = 0;
/* Return something valid, since we have /* Then remove it from buffer */
* already warned the user, and he probably g_string_erase (xchatout_buffer, 0, pos - xchatout_buffer->str + 1);
* won't be able to notice this exception. */
goto exit;
}
xchatout_buffer = new_buffer;
}
memcpy(xchatout_buffer+xchatout_buffer_pos, data, data_size);
print_limit = new_buffer_pos = xchatout_buffer_pos+data_size;
pos = xchatout_buffer+print_limit;
if (add_space && *(pos-1) != '\n') {
*pos = ' ';
*(pos+1) = 0;
new_buffer_pos++;
}
while (*pos != '\n' && print_limit > xchatout_buffer_pos) {
pos--;
print_limit--;
}
if (*pos == '\n') {
/* Crop it, inserting the string limiter there. */
*pos = 0;
hexchat_print(ph, xchatout_buffer);
if (print_limit < new_buffer_pos) {
/* There's still data to be printed. */
print_limit += 1; /* Include the limiter. */
xchatout_buffer_pos = new_buffer_pos-print_limit;
memmove(xchatout_buffer, xchatout_buffer+print_limit,
xchatout_buffer_pos);
} else {
xchatout_buffer_pos = 0;
}
} else {
xchatout_buffer_pos = new_buffer_pos;
} }
exit:
END_XCHAT_CALLS(); END_XCHAT_CALLS();
Py_INCREF(Py_None); Py_INCREF(Py_None);
return Py_None; return Py_None;
@ -2775,6 +2741,7 @@ hexchat_plugin_init(hexchat_plugin *plugin_handle,
Py_Initialize(); Py_Initialize();
PySys_SetArgv(1, argv); PySys_SetArgv(1, argv);
xchatout_buffer = g_string_new (NULL);
xchatout = XChatOut_New(); xchatout = XChatOut_New();
if (xchatout == NULL) { if (xchatout == NULL) {
hexchat_print(ph, "Can't allocate xchatout object"); hexchat_print(ph, "Can't allocate xchatout object");
@ -2845,10 +2812,8 @@ hexchat_plugin_deinit()
plugin_list = NULL; plugin_list = NULL;
/* Reset xchatout buffer. */ /* Reset xchatout buffer. */
g_free(xchatout_buffer); g_string_free (xchatout_buffer, TRUE);
xchatout_buffer = NULL; xchatout_buffer = NULL;
xchatout_buffer_size = 0;
xchatout_buffer_pos = 0;
if (interp_plugin) { if (interp_plugin) {
Py_DECREF(interp_plugin); Py_DECREF(interp_plugin);