mirrors/qemu
1
0
Fork 0
Code Issues Pull Requests Packages Projects Releases Wiki Activity

virtio-9p: Add string manipulation support.

Browse Source 
Add helpers to do string manipulation.

Signed-off-by: Anthony Liguori <aliguori@us.ibm.com>
Signed-off-by: Aneesh Kumar K.V <aneesh.kumar@linux.vnet.ibm.com>
Signed-off-by: Anthony Liguori <aliguori@us.ibm.com>
This commit is contained in:
Anthony Liguori 2010-04-29 17:44:46 +05:30
parent 405a549a16
commit a03f787439
1 changed files with 127 additions and 0 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

127
hw/virtio-9p.c
View File

@ -21,6 +21,126 @@
int dotu = 1;
int debug_9p_pdu;
static void v9fs_string_init(V9fsString *str)
{
str->data = NULL;
str->size = 0;
}
static void v9fs_string_free(V9fsString *str)
{
qemu_free(str->data);
str->data = NULL;
str->size = 0;
}
static void v9fs_string_null(V9fsString *str)
{
v9fs_string_free(str);
}
static int number_to_string(void *arg, char type)
{
unsigned int ret = 0;
switch (type) {
case 'u': {
unsigned int num = *(unsigned int *)arg;
do {
ret++;
num = num/10;
} while (num);
break;
}
default:
printf("Number_to_string: Unknown number format\n");
return -1;
}
return ret;
}
static int v9fs_string_alloc_printf(char **strp, const char *fmt, va_list ap)
{
va_list ap2;
char *iter = (char *)fmt;
int len = 0;
int nr_args = 0;
char *arg_char_ptr;
unsigned int arg_uint;
/* Find the number of %'s that denotes an argument */
for (iter = strstr(iter, "%"); iter; iter = strstr(iter, "%")) {
nr_args++;
iter++;
}
len = strlen(fmt) - 2*nr_args;
if (!nr_args) {
goto alloc_print;
}
va_copy(ap2, ap);
iter = (char *)fmt;
/* Now parse the format string */
for (iter = strstr(iter, "%"); iter; iter = strstr(iter, "%")) {
iter++;
switch (*iter) {
case 'u':
arg_uint = va_arg(ap2, unsigned int);
len += number_to_string((void *)&arg_uint, 'u');
break;
case 's':
arg_char_ptr = va_arg(ap2, char *);
len += strlen(arg_char_ptr);
break;
case 'c':
len += 1;
break;
default:
fprintf(stderr,
"v9fs_string_alloc_printf:Incorrect format %c", *iter);
return -1;
}
iter++;
}
alloc_print:
*strp = qemu_malloc((len + 1) * sizeof(**strp));
return vsprintf(*strp, fmt, ap);
}
static void v9fs_string_sprintf(V9fsString *str, const char *fmt, ...)
{
va_list ap;
int err;
v9fs_string_free(str);
va_start(ap, fmt);
err = v9fs_string_alloc_printf(&str->data, fmt, ap);
BUG_ON(err == -1);
va_end(ap);
str->size = err;
}
static void v9fs_string_copy(V9fsString *lhs, V9fsString *rhs)
{
v9fs_string_free(lhs);
v9fs_string_sprintf(lhs, "%s", rhs->data);
}
static size_t v9fs_string_size(V9fsString *str)
{
return str->size;
}
static V9fsPDU *alloc_pdu(V9fsState *s)
{
V9fsPDU *pdu = NULL;
@ -311,6 +431,13 @@ static void v9fs_dummy(V9fsState *s, V9fsPDU *pdu)
* They will be removed in the subsequent patches */
(void)pdu_unmarshal;
(void) complete_pdu;
(void) v9fs_string_init;
(void) v9fs_string_free;
(void) v9fs_string_null;
(void) v9fs_string_sprintf;
(void) v9fs_string_copy;
(void) v9fs_string_size;
}
static void v9fs_version(V9fsState *s, V9fsPDU *pdu)