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[xml backend] Extract functions to make gz_trhead_func more readable.

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This commit is contained in:
John Ralls 2022-03-01 12:08:59 -08:00
parent 25181a6c01
commit 67e8c317da
1 changed files with 111 additions and 86 deletions
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197
libgnucash/backend/xml/io-gncxml-v2.cpp
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@ -1387,46 +1387,126 @@ gnc_book_write_accounts_to_xml_filehandle_v2 (QofBackend* qof_be, QofBook* book,
return success;
}
#define BUFLEN 4096
#ifdef G_OS_WIN32
static inline gzFile
gzopen_win32 (const char* filename, const char* perms)
{
gzFile file;
char* new_perms = nullptr;
char* conv_name = g_win32_locale_filename_from_utf8 (filename);
if (!conv_name)
{
g_warning ("Could not convert '%s' to system codepage",
filename);
success = 0;
return nullptr;
}
if (strchr (perms, 'b'))
new_perms = g_strdup (perms);
else
new_perms = g_strdup_printf ("%cb%s", *perms, perms + 1);
file = gzopen (conv_name, new_perms);
g_free (new_perms);
g_free (conv_name);
return file;
}
#endif
constexpr uint32_t BUFLEN{4096};
static inline bool
gz_thread_write (gzFile file, gz_thread_params_t* params)
{
bool success = true;
gchar buffer[BUFLEN];
while (success)
{
auto bytes = read (params->fd, buffer, BUFLEN);
if (bytes > 0)
{
if (gzwrite (file, buffer, bytes) <= 0)
{
gint errnum;
auto error = gzerror (file, &errnum);
g_warning ("Could not write the compressed file '%s'. The error is: '%s' (%d)",
params->filename, error, errnum);
success = false;
}
}
else if (bytes == 0)
{
printf("gz_thread_func EOF\n");
break;
}
else
{
g_warning ("Could not read from pipe. The error is '%s' (errno %d)",
g_strerror (errno) ? g_strerror (errno) : "", errno);
success = false;
}
}
return success;
}
#if COMPILER(MSVC)
#define WRITE_FN _write
#else
#define WRITE_FN write
#endif
static inline bool
gz_thread_read (gzFile file, gz_thread_params_t* params)
{
bool success = true;
gchar buffer[BUFLEN];
while (success)
{
auto gzval = gzread (file, buffer, BUFLEN);
if (gzval > 0)
{
if (WRITE_FN (params->fd, buffer, gzval) < 0)
{
g_warning ("Could not write to pipe. The error is '%s' (%d)",
g_strerror (errno) ? g_strerror (errno) : "", errno);
success = false;
}
}
else if (gzval == 0)
{
break;
}
else
{
gint errnum;
const gchar* error = gzerror (file, &errnum);
g_warning ("Could not read from compressed file '%s'. The error is: '%s' (%d)",
params->filename, error, errnum);
success = false;
}
}
return success;
}
/* Compress or decompress function that is to be run in a separate thread.
* Returns 1 on success or 0 otherwise, stuffed into a pointer type. */
static gpointer
gz_thread_func (gz_thread_params_t* params)
{
gchar buffer[BUFLEN];
gssize bytes;
gint gzval;
gzFile file;
gint success = 1;
bool success = true;
#ifdef G_OS_WIN32
{
gchar* conv_name = g_win32_locale_filename_from_utf8 (params->filename);
gchar* perms;
if (!conv_name)
{
g_warning ("Could not convert '%s' to system codepage",
params->filename);
success = 0;
goto cleanup_gz_thread_func;
}
if (strchr (params->perms, 'b'))
perms = g_strdup (params->perms);
else
perms = g_strdup_printf ("%cb%s", *params->perms, params->perms + 1);
file = gzopen (conv_name, perms);
g_free (perms);
g_free (conv_name);
}
auto file = gzopen_win32 (params->filename, params->perms);
#else /* !G_OS_WIN32 */
file = gzopen (params->filename, params->perms);
auto file = gzopen (params->filename, params->perms);
#endif /* G_OS_WIN32 */
if (file == NULL)
if (!file)
{
g_warning ("Child threads gzopen failed");
success = 0;
@ -1435,73 +1515,18 @@ gz_thread_func (gz_thread_params_t* params)
if (params->write)
{
while (success)
{
bytes = read (params->fd, buffer, BUFLEN);
if (bytes > 0)
{
if (gzwrite (file, buffer, bytes) <= 0)
{
gint errnum;
const gchar* error = gzerror (file, &errnum);
g_warning ("Could not write the compressed file '%s'. The error is: '%s' (%d)",
params->filename, error, errnum);
success = 0;
}
}
else if (bytes == 0)
{
printf("gz_thread_func EOF\n");
break;
}
else
{
g_warning ("Could not read from pipe. The error is '%s' (errno %d)",
g_strerror (errno) ? g_strerror (errno) : "", errno);
success = 0;
}
}
success = gz_thread_write (file, params);
}
else
{
while (success)
{
gzval = gzread (file, buffer, BUFLEN);
if (gzval > 0)
{
if (
#if COMPILER(MSVC)
_write
#else
write
#endif
(params->fd, buffer, gzval) < 0)
{
g_warning ("Could not write to pipe. The error is '%s' (%d)",
g_strerror (errno) ? g_strerror (errno) : "", errno);
success = 0;
}
}
else if (gzval == 0)
{
break;
}
else
{
gint errnum;
const gchar* error = gzerror (file, &errnum);
g_warning ("Could not read from compressed file '%s'. The error is: '%s' (%d)",
params->filename, error, errnum);
success = 0;
}
}
success = gz_thread_read (file, params);
}
if ((gzval = gzclose (file)) != Z_OK)
{
g_warning ("Could not close the compressed file '%s' (errnum %d)",
params->filename, gzval);
success = 0;
success = false;
}
cleanup_gz_thread_func: