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/* vi:set ts=8 sts=8 sw=8:
*
* VIM - Vi IMproved by Bram Moolenaar
* Visual Workshop integration by Gordon Prieur
*
* Do ":help uganda" in Vim to read copying and usage conditions.
* Do ":help credits" in Vim to see a list of people who contributed.
* See README.txt for an overview of the Vim source code.
*/

/*
* WorkShop Debugging Tools. What are these tools and why are they important?
* There are two main tools here. The first tool is a tool for delaying or
* stopping gvim during startup. The second tool is a protocol log tool.
*
* The startup delay tool is called wsdebug_wait(). This is very important for
* debugging startup problems because gvim will be started automatically from
* workshop and cannot be run directly from a debugger. The only way to debug
* a gvim started by workshop is by attaching a debugger to it. Without this
* tool all starup code will have completed before you can get the pid and
* attach.
*
* The second tool is a protocol log tool. The workshop editor server and gvim
* pass information back and forth during a workshop session. Sometimes it is
* very important to peruse this conversation in order to understand what is
* happening. The wsdebug_log_init() call sets up this protocol log tool and
* wsdebug() and wstrace() calls output the information to the log.
*
* This code must have WSDEBUG defined for it to be compiled into vim/gvim.
*/

#ifdef WSDEBUG

#include "vim.h"

FILE *ws_debug = NULL;
u_int ws_dlevel = 0; /* ws_debug verbosity level */

void wsdebug(char *, ...);
void wstrace(char *, ...);

static int lookup(char *);
#ifdef USE_WS_ERRORHANDLER
static int errorHandler(Display *, XErrorEvent *);
#endif


/*
* wsdebug_wait - This function can be used to delay or stop execution of vim.
* Its normally used to delay startup while attaching a
* debugger to a running process. Since workshop starts gvim
* from a background process this is the only way to debug
* startup problems.
*/

void wsdebug_wait(
u_int wait_flags, /* tells what to do */
char *wait_var, /* wait environment variable */
u_int wait_secs) /* how many seconds to wait */
{

init_homedir(); /* not inited yet */
#ifdef USE_WDDUMP
WDDump(0, 0, 0);
#endif

/* for debugging purposes only */
if (wait_flags & WT_ENV && wait_var && getenv(wait_var) != NULL) {
sleep(atoi(getenv(wait_var)));
} else if (wait_flags & WT_WAIT && lookup("~/.gvimwait")) {
sleep(wait_secs > 0 && wait_secs < 120 ? wait_secs : 20);
} else if (wait_flags & WT_STOP && lookup("~/.gvimstop")) {
int w = 1;
while (w) {
;
}
}
} /* end wsdebug_wait */


void
wsdebug_log_init(
char *log_var, /* env var with log file */
char *level_var) /* env var with ws_debug level */
{
char *file; /* possible ws_debug output file */
char *cp; /* ws_dlevel pointer */

if (log_var && (file = getenv(log_var)) != NULL)
{
char buf[BUFSIZ];

vim_snprintf(buf, sizeof(buf), "date > %s", file);
system(buf);
ws_debug = fopen(file, "a");
if (level_var && (cp = getenv(level_var)) != NULL) {
ws_dlevel = strtoul(cp, NULL, 0);
} else {
ws_dlevel = WS_TRACE; /* default level */
}
#ifdef USE_WS_ERRORHANDLER
XSetErrorHandler(errorHandler);
#endif
}

} /* end wsdebug_log_init */




void
wstrace(
char *fmt,
...)
{
va_list ap;

if (ws_debug!= NULL && (ws_dlevel & (WS_TRACE | WS_TRACE_VERBOSE))) {
va_start(ap, fmt);
vfprintf(ws_debug, fmt, ap);
va_end(ap);
fflush(ws_debug);
}

} /* end wstrace */


void
wsdebug(
char *fmt,
...)
{
va_list ap;

if (ws_debug != NULL) {
va_start(ap, fmt);
vfprintf(ws_debug, fmt, ap);
va_end(ap);
fflush(ws_debug);
}

} /* end wsdebug */


static int
lookup(
char *file)
{
char buf[BUFSIZ];

expand_env((char_u *) file, (char_u *) buf, BUFSIZ);
return (access(buf, F_OK) == 0);

} /* end lookup */

#ifdef USE_WS_ERRORHANDLER
static int
errorHandler(
Display *dpy,
XErrorEvent *err)
{
char msg[256];
char buf[256];

XGetErrorText(dpy, err->error_code, msg, sizeof(msg));
wsdebug("\n\nWSDEBUG Vim: X Error of failed request: %s\n", msg);

sprintf(buf, "%d", err->request_code);
XGetErrorDatabaseText(dpy,
"XRequest", buf, "Unknown", msg, sizeof(msg));
wsdebug("\tMajor opcode of failed request: %d (%s)\n",
err->request_code, msg);
if (err->request_code > 128) {
wsdebug("\tMinor opcode of failed request: %d\n",
err->minor_code);
}

return 0;
}
#endif



#endif /* WSDEBUG */
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