[lttv.git] / ltt-usertrace / ltt / ltt-facility-custom-user_generic.h

#ifndef _LTT_FACILITY_CUSTOM_USER_GENERIC_H_
#define _LTT_FACILITY_CUSTOM_USER_GENERIC_H_

#include <sys/types.h>
#include <ltt/ltt-facility-id-user_generic.h>
#include <ltt/ltt-generic.h>
#include <stdio.h>
#include <stdlib.h>
#include <stdarg.h>

static inline int trace_user_generic_slow_printf(
		const char *fmt, ...)
#ifndef LTT_TRACE
{
}
#else
{
	/* Guess we need no more than 100 bytes. */
	int n, size = 100;
	char *p, *np;
	va_list ap;
	int ret;

	if ((p = malloc (size)) == NULL)
		return -1;

	while (1) {
		/* Try to print in the allocated space. */
		va_start(ap, fmt);
		n = vsnprintf (p, size, fmt, ap);
		va_end(ap);
		/* If that worked, trace the string. */
		if (n > -1 && n < size) {
			ret = trace_user_generic_slow_printf_param_buffer(p, n+1);
			free(p);
			return ret;
		}
		/* Else try again with more space. */
		if (n > -1)    /* glibc 2.1 */
			 size = n+1; /* precisely what is needed */
		else           /* glibc 2.0 */
			 size *= 2;  /* twice the old size */
		if ((np = realloc (p, size)) == NULL) {
			 free(p);
			 return -1;
		} else {
			 p = np;
		}
 	}
}
#endif //LTT_TRACE

#endif //_LTT_FACILITY_CUSTOM_USER_GENERIC_H_
Commit	Line	Data
e36efdc5	1	#ifndef _LTT_FACILITY_CUSTOM_USER_GENERIC_H_
	2	#define _LTT_FACILITY_CUSTOM_USER_GENERIC_H_
	3
	4	#include <sys/types.h>
	5	#include <ltt/ltt-facility-id-user_generic.h>
	6	#include <ltt/ltt-generic.h>
	7	#include <stdio.h>
	8	#include <stdlib.h>
	9	#include <stdarg.h>
	10
	11	static inline int trace_user_generic_slow_printf(
	12	const char *fmt, ...)
	13	#ifndef LTT_TRACE
	14	{
	15	}
	16	#else
	17	{
	18	/* Guess we need no more than 100 bytes. */
	19	int n, size = 100;
	20	char p, np;
	21	va_list ap;
	22	int ret;
	23
	24	if ((p = malloc (size)) == NULL)
	25	return -1;
	26
	27	while (1) {
	28	/* Try to print in the allocated space. */
	29	va_start(ap, fmt);
	30	n = vsnprintf (p, size, fmt, ap);
	31	va_end(ap);
	32	/* If that worked, trace the string. */
	33	if (n > -1 && n < size) {
	34	ret = trace_user_generic_slow_printf_param_buffer(p, n+1);
	35	free(p);
	36	return ret;
	37	}
	38	/* Else try again with more space. */
	39	if (n > -1) /* glibc 2.1 */
	40	size = n+1; /* precisely what is needed */
	41	else /* glibc 2.0 */
	42	size = 2; / twice the old size */
	43	if ((np = realloc (p, size)) == NULL) {
	44	free(p);
	45	return -1;
	46	} else {
	47	p = np;
	48	}
	49	}
	50	}
	51	#endif //LTT_TRACE
	52
	53	#endif //_LTT_FACILITY_CUSTOM_USER_GENERIC_H_