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diff --git a/examples/simplelog.c b/examples/simplelog.c
index 8fb0941..17e3b61 100644
--- a/examples/simplelog.c
+++ b/examples/simplelog.c
@@ -1,249 +1,255 @@
/*
* Copyright (c) 2011 Red Hat, Inc.
*
* All rights reserved.
*
* Author: Angus Salkeld <asalkeld@redhat.com>
*
* libqb is free software: you can redistribute it and/or modify
* it under the terms of the GNU Lesser General Public License as published by
* the Free Software Foundation, either version 2.1 of the License, or
* (at your option) any later version.
*
* libqb is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU Lesser General Public License for more details.
*
* You should have received a copy of the GNU Lesser General Public License
* along with libqb. If not, see <http://www.gnu.org/licenses/>.
*/
#include "os_base.h"
#include <signal.h>
#include <syslog.h>
#include <qb/qbdefs.h>
#include <qb/qblog.h>
#define MY_TAG_ONE (1)
#define MY_TAG_TWO (1 << 1)
#define MY_TAG_THREE (1 << 2)
static int32_t _log_priority = LOG_WARNING;
static void
func_one(void)
{
FILE *fd;
qb_enter();
qb_logt(LOG_DEBUG, MY_TAG_TWO, "arf arf?");
qb_logt(LOG_CRIT, MY_TAG_THREE, "arrrg!");
qb_logt(134, MY_TAG_THREE, "big priority");
qb_logt(LOG_ERR, MY_TAG_THREE, "oops, I did it again");
qb_log(LOG_INFO, "are you aware ...");
fd = fopen("/nothing.txt", "r+");
if (fd == NULL) {
qb_perror(LOG_ERR, "can't open(\"/nothing.txt\")");
} else {
fclose(fd);
}
qb_leave();
}
static void
func_two(void)
{
qb_enter();
qb_logt(LOG_DEBUG, 0, "arf arf?");
qb_logt(LOG_CRIT, MY_TAG_ONE, "arrrg!");
qb_log(LOG_ERR, "oops, I did it again");
qb_logt(LOG_INFO, MY_TAG_THREE, "are you aware ...");
qb_leave();
}
static void
show_usage(const char *name)
{
printf("usage: \n");
printf("%s <options>\n", name);
printf("\n");
printf(" options:\n");
printf("\n");
printf(" -v verbose\n");
printf(" -t threaded logging\n");
printf(" -e log to stderr\n");
printf(" -b log to blackbox\n");
printf(" -f <filename> log to a file\n");
printf(" -h show this help text\n");
printf("\n");
}
static int32_t do_blackbox = QB_FALSE;
static int32_t do_threaded = QB_FALSE;
static void
sigsegv_handler(int sig)
{
(void)signal(SIGSEGV, SIG_DFL);
qb_log_fini();
if (do_blackbox) {
qb_log_blackbox_write_to_file("simple-log.fdata");
}
raise(SIGSEGV);
}
static const char *
my_tags_stringify(uint32_t tags)
{
if (qb_bit_is_set(tags, QB_LOG_TAG_LIBQB_MSG_BIT)) {
return "libqb";
} else if (qb_bit_is_set(tags, 0)) {
return "ONE";
} else if (qb_bit_is_set(tags, 1)) {
return "TWO";
} else if (qb_bit_is_set(tags, 2)) {
return "THREE";
} else {
return "MAIN";
}
}
static void
trace_logger(int32_t t,
struct qb_log_callsite *cs, time_t timestamp, const char *msg)
{
char output_buffer[QB_LOG_MAX_LEN];
output_buffer[0] = '\0';
qb_log_target_format(t, cs, timestamp, msg, output_buffer);
fprintf(stderr, "%s\n", output_buffer);
}
static void
m_filter(struct qb_log_callsite *cs)
{
if ((cs->priority >= LOG_ALERT &&
cs->priority <= _log_priority) &&
strcmp(cs->filename, __FILE__) == 0) {
qb_bit_set(cs->targets, QB_LOG_STDERR);
} else {
qb_bit_clear(cs->targets, QB_LOG_STDERR);
}
}
int32_t
main(int32_t argc, char *argv[])
{
const char *options = "vhteobdf:";
int32_t opt;
int32_t tracer;
int32_t do_stderr = QB_FALSE;
int32_t do_stdout = QB_FALSE;
int32_t do_dump_blackbox = QB_FALSE;
char *logfile = NULL;
int32_t log_fd = -1;
while ((opt = getopt(argc, argv, options)) != -1) {
switch (opt) {
case 'd':
do_dump_blackbox = QB_TRUE;
break;
case 't':
do_threaded = QB_TRUE;
break;
case 'e':
do_stderr = QB_TRUE;
break;
case 'o':
do_stdout = QB_TRUE;
break;
case 'b':
do_blackbox = QB_TRUE;
break;
case 'f':
logfile = optarg;
break;
case 'v':
_log_priority++;
break;
case 'h':
default:
show_usage(argv[0]);
exit(0);
break;
}
}
if (do_dump_blackbox) {
qb_log_blackbox_print_from_file("simple-log.fdata");
exit(0);
}
signal(SIGSEGV, sigsegv_handler);
qb_log_init("simple-log", LOG_USER, LOG_INFO);
qb_log_ctl(QB_LOG_SYSLOG, QB_LOG_CONF_THREADED, do_threaded);
qb_log_tags_stringify_fn_set(my_tags_stringify);
if (do_stderr) {
qb_log_filter_fn_set(m_filter);
qb_log_format_set(QB_LOG_STDERR, "[%p] %4g: %f:%l %b");
qb_log_ctl(QB_LOG_STDERR, QB_LOG_CONF_ENABLED, QB_TRUE);
tracer = qb_log_custom_open(trace_logger, NULL, NULL, NULL);
qb_log_ctl(tracer, QB_LOG_CONF_ENABLED, QB_TRUE);
qb_log_format_set(tracer, "%4g: %n() %b");
qb_log_filter_ctl2(tracer, QB_LOG_FILTER_ADD,
QB_LOG_FILTER_FILE, __FILE__,
LOG_TRACE, 200);
}
if (do_stdout) {
qb_log_filter_ctl2(QB_LOG_STDOUT, QB_LOG_FILTER_ADD,
QB_LOG_FILTER_FILE, __FILE__,
LOG_ALERT, QB_MIN(LOG_DEBUG, _log_priority));
qb_log_format_set(QB_LOG_STDOUT, "[%p] %4g: %f:%l %b");
qb_log_ctl(QB_LOG_STDOUT, QB_LOG_CONF_ENABLED, QB_TRUE);
}
if (do_blackbox) {
qb_log_filter_ctl(QB_LOG_BLACKBOX, QB_LOG_FILTER_ADD,
QB_LOG_FILTER_FILE, "*", LOG_DEBUG);
qb_log_ctl(QB_LOG_BLACKBOX, QB_LOG_CONF_SIZE, 4096);
qb_log_ctl(QB_LOG_BLACKBOX, QB_LOG_CONF_THREADED, QB_FALSE);
qb_log_ctl(QB_LOG_BLACKBOX, QB_LOG_CONF_ENABLED, QB_TRUE);
}
if (logfile) {
log_fd = qb_log_file_open(logfile);
qb_log_filter_ctl(log_fd, QB_LOG_FILTER_ADD,
QB_LOG_FILTER_FILE, __FILE__, _log_priority);
qb_log_format_set(log_fd, "[%N] %t %n() [%p] %b");
qb_log_ctl(log_fd, QB_LOG_CONF_THREADED, do_threaded);
qb_log_ctl(log_fd, QB_LOG_CONF_ENABLED, QB_TRUE);
}
if (do_threaded) {
qb_log_thread_start();
}
qb_log(LOG_DEBUG, "hello");
qb_log(LOG_INFO, "this is an info");
qb_log(LOG_NOTICE, "hello - notice?");
+ {
+ char * str = NULL;
+ qb_log(LOG_ERR,
+ "%s ------%s------------- %u?",
+ NULL, str, 56);
+ }
func_one();
func_two();
qb_log_ctl(QB_LOG_SYSLOG, QB_LOG_CONF_ENABLED, QB_FALSE);
qb_log(LOG_WARNING, "no syslog");
qb_log(LOG_ERR, "no syslog");
#if 0
// test blackbox
logfile = NULL;
logfile[5] = 'a';
#endif
if (do_blackbox) {
qb_log_blackbox_write_to_file("simple-log.fdata");
qb_log_blackbox_print_from_file("simple-log.fdata");
qb_log_ctl(QB_LOG_BLACKBOX, QB_LOG_CONF_ENABLED, QB_FALSE);
}
qb_log_fini();
return 0;
}
diff --git a/lib/log_format.c b/lib/log_format.c
index 0cbb543..6a74fbb 100644
--- a/lib/log_format.c
+++ b/lib/log_format.c
@@ -1,706 +1,710 @@
/*
* Copyright (C) 2011 Red Hat, Inc.
*
* All rights reserved.
*
* Author: Angus Salkeld <asalkeld@redhat.com>
*
* libqb is free software: you can redistribute it and/or modify
* it under the terms of the GNU Lesser General Public License as published by
* the Free Software Foundation, either version 2.1 of the License, or
* (at your option) any later version.
*
* libqb is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU Lesser General Public License for more details.
*
* You should have received a copy of the GNU Lesser General Public License
* along with libqb. If not, see <http://www.gnu.org/licenses/>.
*/
#include "os_base.h"
#include <ctype.h>
#include <qb/qbdefs.h>
#include "log_int.h"
static qb_log_tags_stringify_fn _user_tags_stringify_fn;
/*
* syslog prioritynames, facility names to value mapping
* Some C libraries build this in to their headers, but it is non-portable
* so logsys supplies its own version.
*/
struct syslog_names {
const char *c_name;
int32_t c_val;
};
static struct syslog_names prioritynames[] = {
{"emerg", LOG_EMERG},
{"alert", LOG_ALERT},
{"crit", LOG_CRIT},
{"error", LOG_ERR},
{"warning", LOG_WARNING},
{"notice", LOG_NOTICE},
{"info", LOG_INFO},
{"debug", LOG_DEBUG},
{"trace", LOG_TRACE},
{NULL, -1}
};
struct syslog_names facilitynames[] = {
{"auth", LOG_AUTH},
#if defined(LOG_AUTHPRIV)
{"authpriv", LOG_AUTHPRIV},
#endif
{"cron", LOG_CRON},
{"daemon", LOG_DAEMON},
#if defined(LOG_FTP)
{"ftp", LOG_FTP},
#endif
{"kern", LOG_KERN},
{"lpr", LOG_LPR},
{"mail", LOG_MAIL},
{"news", LOG_NEWS},
{"syslog", LOG_SYSLOG},
{"user", LOG_USER},
{"uucp", LOG_UUCP},
{"local0", LOG_LOCAL0},
{"local1", LOG_LOCAL1},
{"local2", LOG_LOCAL2},
{"local3", LOG_LOCAL3},
{"local4", LOG_LOCAL4},
{"local5", LOG_LOCAL5},
{"local6", LOG_LOCAL6},
{"local7", LOG_LOCAL7},
{NULL, -1}
};
static const char log_month_name[][4] = {
"Jan", "Feb", "Mar", "Apr", "May", "Jun",
"Jul", "Aug", "Sep", "Oct", "Nov", "Dec"
};
/* Convert string "auth" to equivalent number "LOG_AUTH" etc. */
int32_t
qb_log_facility2int(const char *fname)
{
int32_t i;
if (fname == NULL) {
return -EINVAL;
}
for (i = 0; facilitynames[i].c_name != NULL; i++) {
if (strcmp(fname, facilitynames[i].c_name) == 0) {
return facilitynames[i].c_val;
}
}
return -EINVAL;
}
/* Convert number "LOG_AUTH" to equivalent string "auth" etc. */
const char *
qb_log_facility2str(int32_t fnum)
{
int32_t i;
for (i = 0; facilitynames[i].c_name != NULL; i++) {
if (facilitynames[i].c_val == fnum) {
return facilitynames[i].c_name;
}
}
return NULL;
}
void
qb_log_tags_stringify_fn_set(qb_log_tags_stringify_fn fn)
{
_user_tags_stringify_fn = fn;
}
static int
_strcpy_cutoff(char *dest, const char *src, size_t cutoff, int ralign,
size_t buf_len)
{
size_t len = strlen(src);
if (buf_len <= 1) {
if (buf_len == 0)
dest[0] = 0;
return 0;
}
if (cutoff == 0) {
cutoff = len;
}
cutoff = QB_MIN(cutoff, buf_len - 1);
len = QB_MIN(len, cutoff);
if (ralign) {
memset(dest, ' ', cutoff - len);
memcpy(dest + cutoff - len, src, len);
} else {
memcpy(dest, src, len);
memset(dest + len, ' ', cutoff - len);
}
dest[cutoff] = '\0';
return cutoff;
}
/*
* This function will do static formatting (for things that don't
* change on each log message).
*
* %P PID
* %N name passed into qb_log_init
* %H hostname
*
* any number between % and character specify field length to pad or chop
*/
void
qb_log_target_format_static(int32_t target, const char * format,
char *output_buffer)
{
char tmp_buf[255];
unsigned int format_buffer_idx = 0;
unsigned int output_buffer_idx = 0;
size_t cutoff;
uint32_t len;
int ralign;
int c;
struct qb_log_target *t = qb_log_target_get(target);
if (format == NULL) {
return;
}
while ((c = format[format_buffer_idx])) {
cutoff = 0;
ralign = 0;
if (c != '%') {
output_buffer[output_buffer_idx++] = c;
format_buffer_idx++;
} else {
const char *p;
unsigned int percent_buffer_idx = format_buffer_idx;
format_buffer_idx += 1;
if (format[format_buffer_idx] == '-') {
ralign = 1;
format_buffer_idx += 1;
}
if (isdigit(format[format_buffer_idx])) {
cutoff = atoi(&format[format_buffer_idx]);
}
while (isdigit(format[format_buffer_idx])) {
format_buffer_idx += 1;
}
switch (format[format_buffer_idx]) {
case 'P':
snprintf(tmp_buf, 30, "%d", getpid());
p = tmp_buf;
break;
case 'N':
p = t->name;
break;
case 'H':
if (gethostname(tmp_buf, 255) == 0) {
tmp_buf[254] = '\0';
} else {
(void)strlcpy(tmp_buf, "localhost", 255);
}
p = tmp_buf;
break;
default:
p = &format[percent_buffer_idx];
cutoff = (format_buffer_idx - percent_buffer_idx + 1);
ralign = 0;
break;
}
len = _strcpy_cutoff(output_buffer + output_buffer_idx,
p, cutoff, ralign,
(QB_LOG_MAX_LEN -
output_buffer_idx));
output_buffer_idx += len;
format_buffer_idx += 1;
}
if (output_buffer_idx >= QB_LOG_MAX_LEN - 1) {
break;
}
}
output_buffer[output_buffer_idx] = '\0';
}
/*
* %n FUNCTION NAME
* %f FILENAME
* %l FILELINE
* %p PRIORITY
* %t TIMESTAMP
* %b BUFFER
* %g SUBSYSTEM
*
* any number between % and character specify field length to pad or chop
*/
void
qb_log_target_format(int32_t target,
struct qb_log_callsite *cs,
time_t current_time,
const char *formatted_message, char *output_buffer)
{
char tmp_buf[128];
struct tm tm_res;
unsigned int format_buffer_idx = 0;
unsigned int output_buffer_idx = 0;
size_t cutoff;
uint32_t len;
int ralign;
int c;
struct qb_log_target *t = qb_log_target_get(target);
if (t->format == NULL) {
return;
}
while ((c = t->format[format_buffer_idx])) {
cutoff = 0;
ralign = 0;
if (c != '%') {
output_buffer[output_buffer_idx++] = c;
format_buffer_idx++;
} else {
const char *p;
format_buffer_idx += 1;
if (t->format[format_buffer_idx] == '-') {
ralign = 1;
format_buffer_idx += 1;
}
if (isdigit(t->format[format_buffer_idx])) {
cutoff = atoi(&t->format[format_buffer_idx]);
}
while (isdigit(t->format[format_buffer_idx])) {
format_buffer_idx += 1;
}
switch (t->format[format_buffer_idx]) {
case 'g':
if (_user_tags_stringify_fn) {
p = _user_tags_stringify_fn(cs->tags);
} else {
p = "";
}
break;
case 'n':
p = cs->function;
break;
case 'f':
#ifdef BUILDING_IN_PLACE
p = cs->filename;
#else
p = strrchr(cs->filename, '/');
if (p == NULL) {
p = cs->filename;
} else {
p++; /* move past the "/" */
}
#endif /* BUILDING_IN_PLACE */
break;
case 'l':
snprintf(tmp_buf, 30, "%d", cs->lineno);
p = tmp_buf;
break;
case 't':
(void)localtime_r(&current_time, &tm_res);
snprintf(tmp_buf, TIME_STRING_SIZE,
"%s %02d %02d:%02d:%02d",
log_month_name[tm_res.tm_mon],
tm_res.tm_mday, tm_res.tm_hour,
tm_res.tm_min, tm_res.tm_sec);
p = tmp_buf;
break;
case 'b':
p = formatted_message;
break;
case 'p':
if (cs->priority > LOG_TRACE) {
p = prioritynames[LOG_TRACE].c_name;
} else {
p = prioritynames[cs->priority].c_name;
}
break;
default:
p = "";
break;
}
len = _strcpy_cutoff(output_buffer + output_buffer_idx,
p, cutoff, ralign,
(QB_LOG_MAX_LEN -
output_buffer_idx));
output_buffer_idx += len;
format_buffer_idx += 1;
}
if (output_buffer_idx >= QB_LOG_MAX_LEN - 1) {
break;
}
}
if (output_buffer[output_buffer_idx - 1] == '\n') {
output_buffer[output_buffer_idx - 1] = '\0';
} else {
output_buffer[output_buffer_idx] = '\0';
}
}
size_t
qb_vsprintf_serialize(char *serialize, const char *fmt, va_list ap)
{
char *format;
char *p;
uint32_t location = 0;
int type_long = 0;
int type_longlong = 0;
p = stpcpy(serialize, fmt);
location = p - serialize + 1;
format = (char *)fmt;
for (;;) {
type_long = 0;
type_longlong = 0;
p = strchrnul((const char *)format, '%');
if (*p == '\0') {
break;
}
format = p + 1;
reprocess:
switch (format[0]) {
case '#': /* alternate form conversion, ignore */
case '-': /* left adjust, ignore */
case ' ': /* a space, ignore */
case '+': /* a sign should be used, ignore */
case '\'': /* group in thousands, ignore */
case 'I': /* glibc-ism locale alternative, ignore */
case '.': /* precision, ignore */
case '0': /* field width, ignore */
case '1': /* field width, ignore */
case '2': /* field width, ignore */
case '3': /* field width, ignore */
case '4': /* field width, ignore */
case '5': /* field width, ignore */
case '6': /* field width, ignore */
case '7': /* field width, ignore */
case '8': /* field width, ignore */
case '9': /* field width, ignore */
format++;
goto reprocess;
case '*': /* variable field width, save */ {
int arg_int = va_arg(ap, int);
memcpy(&serialize[location], &arg_int, sizeof (int));
location += sizeof(int);
format++;
goto reprocess;
}
case 'l':
format++;
type_long = 1;
if (*format == 'l') {
type_long = 0;
type_longlong = 1;
format++;
}
goto reprocess;
case 'd': /* int argument */
case 'i': /* int argument */
case 'o': /* unsigned int argument */
case 'u':
case 'x':
case 'X':
if (type_long) {
long int arg_int;
arg_int = va_arg(ap, long int);
memcpy(&serialize[location], &arg_int,
sizeof(long int));
location += sizeof(long int);
format++;
break;
} else if (type_longlong) {
long long int arg_int;
arg_int = va_arg(ap, long long int);
memcpy(&serialize[location], &arg_int,
sizeof(long long int));
location += sizeof(long long int);
format++;
break;
} else {
int arg_int;
arg_int = va_arg(ap, int);
memcpy(&serialize[location], &arg_int,
sizeof(int));
location += sizeof(int);
format++;
break;
}
case 'e':
case 'E':
case 'f':
case 'F':
case 'g':
case 'G':
case 'a':
case 'A':
{
double arg_double;
arg_double = va_arg(ap, double);
memcpy (&serialize[location], &arg_double, sizeof (double));
location += sizeof(double);
format++;
break;
}
case 'c':
{
int arg_int;
unsigned char arg_char;
arg_int = va_arg(ap, unsigned int);
arg_char = (unsigned char)arg_int;
memcpy (&serialize[location], &arg_char, sizeof (unsigned char));
location += sizeof(unsigned char);
break;
}
case 's':
{
char *arg_string;
arg_string = va_arg(ap, char *);
- p = stpcpy(&serialize[location], arg_string);
+ if (arg_string == NULL) {
+ p = stpcpy(&serialize[location], "(null)");
+ } else {
+ p = stpcpy(&serialize[location], arg_string);
+ }
location += p - &serialize[location] + 1;
break;
}
case 'p':
{
void *arg_pointer;
arg_pointer = va_arg(ap, void *);
memcpy (&serialize[location], &arg_pointer, sizeof (void *));
location += sizeof (arg_pointer);
break;
}
case '%':
serialize[location++] = '%';
break;
}
}
return (location);
}
#define MINI_FORMAT_STR_LEN 20
size_t
qb_vsnprintf_deserialize(char *string, size_t str_len, const char *buf)
{
char *p;
char *format;
char fmt[MINI_FORMAT_STR_LEN];
int fmt_pos;
uint32_t location = 0;
uint32_t data_pos = strlen(buf) + 1;
int type_long = 0;
int type_longlong = 0;
int len;
format = (char *)buf;
for (;;) {
type_long = 0;
type_longlong = 0;
p = strchrnul((const char *)format, '%');
if (*p == '\0') {
p = stpcpy(&string[location], format);
location += p - &string[location] + 1;
break;
}
/* copy from current to the next % */
len = p - format;
strncpy(&string[location], format, len);
location += len;
format = p;
/* start building up the format for snprintf */
fmt_pos = 0;
fmt[fmt_pos++] = *format;
format++;
reprocess:
switch (format[0]) {
case '#': /* alternate form conversion, ignore */
case '-': /* left adjust, ignore */
case ' ': /* a space, ignore */
case '+': /* a sign should be used, ignore */
case '\'': /* group in thousands, ignore */
case 'I': /* glibc-ism locale alternative, ignore */
case '.': /* precision, ignore */
case '0': /* field width, ignore */
case '1': /* field width, ignore */
case '2': /* field width, ignore */
case '3': /* field width, ignore */
case '4': /* field width, ignore */
case '5': /* field width, ignore */
case '6': /* field width, ignore */
case '7': /* field width, ignore */
case '8': /* field width, ignore */
case '9': /* field width, ignore */
fmt[fmt_pos++] = *format;
format++;
goto reprocess;
case '*': {
int arg_int;
memcpy(&arg_int, &buf[data_pos], sizeof(int));
data_pos += sizeof(int);
fmt_pos += snprintf(&fmt[fmt_pos],
MINI_FORMAT_STR_LEN - fmt_pos,
"%d", arg_int);
format++;
goto reprocess;
}
case 'l':
fmt[fmt_pos++] = *format;
format++;
type_long = 1;
if (*format == 'l') {
type_long = 0;
type_longlong = 1;
}
goto reprocess;
case 'd': /* int argument */
case 'i': /* int argument */
case 'o': /* unsigned int argument */
case 'u':
case 'x':
case 'X':
if (type_long) {
long int arg_int;
fmt[fmt_pos++] = *format;
fmt[fmt_pos++] = '\0';
memcpy(&arg_int, &buf[data_pos], sizeof(long int));
location += snprintf(&string[location],
str_len - location,
fmt, arg_int);
data_pos += sizeof(long int);
format++;
break;
} else if (type_longlong) {
long long int arg_int;
fmt[fmt_pos++] = *format;
fmt[fmt_pos++] = '\0';
memcpy(&arg_int, &buf[data_pos], sizeof(long long int));
location += snprintf(&string[location],
str_len - location,
fmt, arg_int);
data_pos += sizeof(long long int);
format++;
break;
} else {
int arg_int;
fmt[fmt_pos++] = *format;
fmt[fmt_pos++] = '\0';
memcpy(&arg_int, &buf[data_pos], sizeof(int));
location += snprintf(&string[location],
str_len - location,
fmt, arg_int);
data_pos += sizeof(int);
format++;
break;
}
case 'e':
case 'E':
case 'f':
case 'F':
case 'g':
case 'G':
case 'a':
case 'A':
{
double arg_double;
fmt[fmt_pos++] = *format;
fmt[fmt_pos++] = '\0';
memcpy(&arg_double, &buf[data_pos], sizeof(double));
location += snprintf(&string[location],
str_len - location,
fmt, arg_double);
data_pos += sizeof(double);
format++;
break;
}
case 'c':
{
unsigned char *arg_char;
fmt[fmt_pos++] = *format;
fmt[fmt_pos++] = '\0';
arg_char = (unsigned char*)&buf[data_pos];
location += snprintf(&string[location],
str_len - location,
fmt, *arg_char);
data_pos += sizeof(unsigned char);
format++;
break;
}
case 's':
{
fmt[fmt_pos++] = *format;
fmt[fmt_pos++] = '\0';
len = snprintf(&string[location],
str_len - location,
fmt, &buf[data_pos]);
location += len;
data_pos += len + 1;
format++;
break;
}
case 'p':
{
fmt[fmt_pos++] = *format;
fmt[fmt_pos++] = '\0';
location = snprintf(&string[location],
str_len - location,
fmt, &buf[data_pos]);
data_pos += sizeof(void*);
format++;
break;
}
case '%':
string[location++] = '%';
format++;
break;
}
}
return location;
}

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