diff options
Diffstat (limited to 'hw')
-rw-r--r-- | hw/virtio-9p.c | 127 |
1 files changed, 127 insertions, 0 deletions
diff --git a/hw/virtio-9p.c b/hw/virtio-9p.c index 10d832a7b4..97e9b04a60 100644 --- a/hw/virtio-9p.c +++ b/hw/virtio-9p.c @@ -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) |