move json formatting to the blobmsg_json library

This commit is contained in:
Felix Fietkau 2011-02-06 21:23:28 +01:00
parent 677e7bc0b3
commit 0918243e90
4 changed files with 186 additions and 188 deletions

175
blobmsg.c
View file

@ -15,181 +15,6 @@
#include "blobmsg.h"
struct strbuf {
int len;
int pos;
char *buf;
blobmsg_json_format_t custom_format;
void *priv;
};
static bool blobmsg_puts(struct strbuf *s, const char *c, int len)
{
if (len <= 0)
return true;
if (s->pos + len >= s->len) {
s->len += 16;
s->buf = realloc(s->buf, s->len);
if (!s->buf)
return false;
}
memcpy(s->buf + s->pos, c, len);
s->pos += len;
return true;
}
static void blobmsg_format_string(struct strbuf *s, const char *str)
{
const char *p, *last = str, *end = str + strlen(str);
char buf[8] = "\\u00";
blobmsg_puts(s, "\"", 1);
for (p = str; *p; p++) {
char escape = '\0';
int len;
switch(*p) {
case '\b':
escape = 'b';
break;
case '\n':
escape = 'n';
break;
case '\t':
escape = 't';
break;
case '\r':
escape = 'r';
break;
case '"':
case '\\':
case '/':
escape = *p;
break;
default:
if (*p < ' ')
escape = 'u';
break;
}
if (!escape)
continue;
if (p > last)
blobmsg_puts(s, last, p - last);
last = p + 1;
buf[1] = escape;
if (escape == 'u') {
sprintf(buf + 4, "%02x", (unsigned char) *p);
len = 4;
} else {
len = 2;
}
blobmsg_puts(s, buf, len);
}
blobmsg_puts(s, last, end - last);
blobmsg_puts(s, "\"", 1);
}
static void blobmsg_format_json_list(struct strbuf *s, struct blob_attr *attr, int len, bool array);
static void blobmsg_format_element(struct strbuf *s, struct blob_attr *attr, bool array, bool head)
{
const char *data_str;
char buf[32];
void *data;
int len;
if (!array && blobmsg_name(attr)[0]) {
blobmsg_format_string(s, blobmsg_name(attr));
blobmsg_puts(s, ":", 1);
}
if (head) {
data = blob_data(attr);
len = blob_len(attr);
} else {
data = blobmsg_data(attr);
len = blobmsg_data_len(attr);
if (s->custom_format) {
data_str = s->custom_format(s->priv, attr);
if (data_str)
goto out;
}
}
data_str = buf;
switch(blob_id(attr)) {
case BLOBMSG_TYPE_INT8:
sprintf(buf, "%d", *(uint8_t *)data);
break;
case BLOBMSG_TYPE_INT16:
sprintf(buf, "%d", *(uint16_t *)data);
break;
case BLOBMSG_TYPE_INT32:
sprintf(buf, "%d", *(uint32_t *)data);
break;
case BLOBMSG_TYPE_INT64:
sprintf(buf, "%lld", *(uint64_t *)data);
break;
case BLOBMSG_TYPE_STRING:
blobmsg_format_string(s, data);
return;
case BLOBMSG_TYPE_ARRAY:
blobmsg_format_json_list(s, data, len, true);
return;
case BLOBMSG_TYPE_TABLE:
blobmsg_format_json_list(s, data, len, false);
return;
}
out:
blobmsg_puts(s, data_str, strlen(data_str));
}
static void blobmsg_format_json_list(struct strbuf *s, struct blob_attr *attr, int len, bool array)
{
struct blob_attr *pos;
bool first = true;
int rem = len;
blobmsg_puts(s, (array ? "[ " : "{ "), 2);
__blob_for_each_attr(pos, attr, rem) {
if (!first)
blobmsg_puts(s, ", ", 2);
blobmsg_format_element(s, pos, array, false);
first = false;
}
blobmsg_puts(s, (array ? " ]" : " }"), 2);
}
char *blobmsg_format_json_with_cb(struct blob_attr *attr, bool list, blobmsg_json_format_t cb, void *priv)
{
struct strbuf s;
s.len = blob_len(attr);
s.buf = malloc(s.len);
s.pos = 0;
s.custom_format = cb;
s.priv = priv;
if (list)
blobmsg_format_json_list(&s, blob_data(attr), blob_len(attr), false);
else
blobmsg_format_element(&s, attr, false, false);
if (!s.len)
return NULL;
s.buf = realloc(s.buf, s.pos + 1);
return s.buf;
}
static const int blob_type[__BLOBMSG_TYPE_LAST] = {
[BLOBMSG_TYPE_INT8] = BLOB_ATTR_INT8,
[BLOBMSG_TYPE_INT16] = BLOB_ATTR_INT16,

View file

@ -164,17 +164,6 @@ void blobmsg_add_string_buffer(struct blob_buf *buf);
/* blobmsg to json formatting */
typedef const char *(*blobmsg_json_format_t)(void *priv, struct blob_attr *attr);
char *blobmsg_format_json_with_cb(struct blob_attr *attr, bool list,
blobmsg_json_format_t cb, void *priv);
static inline char *blobmsg_format_json(struct blob_attr *attr, bool list)
{
return blobmsg_format_json_with_cb(attr, list, NULL, NULL);
}
#define blobmsg_for_each_attr(pos, attr, rem) \
for (rem = blobmsg_data_len(attr), pos = blobmsg_data(attr); \
(blob_pad_len(pos) <= rem) && \

View file

@ -90,3 +90,178 @@ out:
return ret;
}
struct strbuf {
int len;
int pos;
char *buf;
blobmsg_json_format_t custom_format;
void *priv;
};
static bool blobmsg_puts(struct strbuf *s, const char *c, int len)
{
if (len <= 0)
return true;
if (s->pos + len >= s->len) {
s->len += 16;
s->buf = realloc(s->buf, s->len);
if (!s->buf)
return false;
}
memcpy(s->buf + s->pos, c, len);
s->pos += len;
return true;
}
static void blobmsg_format_string(struct strbuf *s, const char *str)
{
const char *p, *last = str, *end = str + strlen(str);
char buf[8] = "\\u00";
blobmsg_puts(s, "\"", 1);
for (p = str; *p; p++) {
char escape = '\0';
int len;
switch(*p) {
case '\b':
escape = 'b';
break;
case '\n':
escape = 'n';
break;
case '\t':
escape = 't';
break;
case '\r':
escape = 'r';
break;
case '"':
case '\\':
case '/':
escape = *p;
break;
default:
if (*p < ' ')
escape = 'u';
break;
}
if (!escape)
continue;
if (p > last)
blobmsg_puts(s, last, p - last);
last = p + 1;
buf[1] = escape;
if (escape == 'u') {
sprintf(buf + 4, "%02x", (unsigned char) *p);
len = 4;
} else {
len = 2;
}
blobmsg_puts(s, buf, len);
}
blobmsg_puts(s, last, end - last);
blobmsg_puts(s, "\"", 1);
}
static void blobmsg_format_json_list(struct strbuf *s, struct blob_attr *attr, int len, bool array);
static void blobmsg_format_element(struct strbuf *s, struct blob_attr *attr, bool array, bool head)
{
const char *data_str;
char buf[32];
void *data;
int len;
if (!array && blobmsg_name(attr)[0]) {
blobmsg_format_string(s, blobmsg_name(attr));
blobmsg_puts(s, ":", 1);
}
if (head) {
data = blob_data(attr);
len = blob_len(attr);
} else {
data = blobmsg_data(attr);
len = blobmsg_data_len(attr);
if (s->custom_format) {
data_str = s->custom_format(s->priv, attr);
if (data_str)
goto out;
}
}
data_str = buf;
switch(blob_id(attr)) {
case BLOBMSG_TYPE_INT8:
sprintf(buf, "%d", *(uint8_t *)data);
break;
case BLOBMSG_TYPE_INT16:
sprintf(buf, "%d", *(uint16_t *)data);
break;
case BLOBMSG_TYPE_INT32:
sprintf(buf, "%d", *(uint32_t *)data);
break;
case BLOBMSG_TYPE_INT64:
sprintf(buf, "%lld", *(uint64_t *)data);
break;
case BLOBMSG_TYPE_STRING:
blobmsg_format_string(s, data);
return;
case BLOBMSG_TYPE_ARRAY:
blobmsg_format_json_list(s, data, len, true);
return;
case BLOBMSG_TYPE_TABLE:
blobmsg_format_json_list(s, data, len, false);
return;
}
out:
blobmsg_puts(s, data_str, strlen(data_str));
}
static void blobmsg_format_json_list(struct strbuf *s, struct blob_attr *attr, int len, bool array)
{
struct blob_attr *pos;
bool first = true;
int rem = len;
blobmsg_puts(s, (array ? "[ " : "{ "), 2);
__blob_for_each_attr(pos, attr, rem) {
if (!first)
blobmsg_puts(s, ", ", 2);
blobmsg_format_element(s, pos, array, false);
first = false;
}
blobmsg_puts(s, (array ? " ]" : " }"), 2);
}
char *blobmsg_format_json_with_cb(struct blob_attr *attr, bool list, blobmsg_json_format_t cb, void *priv)
{
struct strbuf s;
s.len = blob_len(attr);
s.buf = malloc(s.len);
s.pos = 0;
s.custom_format = cb;
s.priv = priv;
if (list)
blobmsg_format_json_list(&s, blob_data(attr), blob_len(attr), false);
else
blobmsg_format_element(&s, attr, false, false);
if (!s.len)
return NULL;
s.buf = realloc(s.buf, s.pos + 1);
return s.buf;
}

View file

@ -18,10 +18,19 @@
#include <json/json.h>
#include <stdbool.h>
struct blob_buf;
#include "blobmsg.h"
bool blobmsg_add_json_element(struct blob_buf *b, const char *name, json_object *obj);
bool blobmsg_add_json_from_string(struct blob_buf *b, const char *str);
typedef const char *(*blobmsg_json_format_t)(void *priv, struct blob_attr *attr);
char *blobmsg_format_json_with_cb(struct blob_attr *attr, bool list,
blobmsg_json_format_t cb, void *priv);
static inline char *blobmsg_format_json(struct blob_attr *attr, bool list)
{
return blobmsg_format_json_with_cb(attr, list, NULL, NULL);
}
#endif