PJ_DEF(pj_json_elem*) pj_json_parse(pj_pool_t *pool,
char *buffer,
unsigned *size,
pj_json_err_info *err_info)
{
pj_cis_buf_t cis_buf;
struct parse_state st;
pj_json_elem *root;
PJ_USE_EXCEPTION;
PJ_ASSERT_RETURN(pool && buffer && size, NULL);
if (!*size)
return NULL;
pj_bzero(&st, sizeof(st));
st.pool = pool;
st.err_info = err_info;
pj_scan_init(&st.scanner, buffer, *size,
PJ_SCAN_AUTOSKIP_WS | PJ_SCAN_AUTOSKIP_NEWLINE,
&on_syntax_error);
pj_cis_buf_init(&cis_buf);
pj_cis_init(&cis_buf, &st.float_spec);
pj_cis_add_str(&st.float_spec, ".0123456789");
PJ_TRY {
root = parse_elem_throw(&st, NULL);
}
PJ_CATCH_ANY {
root = NULL;
}
PJ_END
if (!root && err_info) {
err_info->line = st.scanner.line;
err_info->col = pj_scan_get_col(&st.scanner) + 1;
err_info->err_char = *st.scanner.curptr;
}
*size = (unsigned)((buffer + *size) - st.scanner.curptr);
pj_scan_fini(&st.scanner);
return root;
}
PJ_DEF(pj_xml_node*) pj_xml_parse( pj_pool_t *pool, char *msg, pj_size_t len)
{
pj_xml_node *node = NULL;
pj_scanner scanner;
PJ_USE_EXCEPTION;
if (!msg || !len || !pool)
return NULL;
pj_scan_init( &scanner, msg, len,
PJ_SCAN_AUTOSKIP_WS|PJ_SCAN_AUTOSKIP_NEWLINE,
&on_syntax_error);
PJ_TRY {
node = xml_parse_node(pool, &scanner);
}
PJ_CATCH_ANY {
PJ_LOG(4,(THIS_FILE, "Syntax error parsing XML in line %d column %d",
scanner.line, pj_scan_get_col(&scanner)));
}
PJ_END;
pj_scan_fini( &scanner );
return node;
}
/*
* Parse SDP message.
*/
PJ_DEF(pj_status_t) pjmedia_sdp_parse( pj_pool_t *pool,
char *buf, pj_size_t len,
pjmedia_sdp_session **p_sdp)
{
pj_scanner scanner;
pjmedia_sdp_session *session;
pjmedia_sdp_media *media = NULL;
void *attr;
pjmedia_sdp_conn *conn;
pj_str_t dummy;
int cur_name = 254;
parse_context ctx;
PJ_USE_EXCEPTION;
ctx.last_error = PJ_SUCCESS;
init_sdp_parser();
pj_scan_init(&scanner, buf, len, 0, &on_scanner_error);
session = pj_pool_calloc(pool, 1, sizeof(pjmedia_sdp_session));
PJ_ASSERT_RETURN(session != NULL, PJ_ENOMEM);
PJ_TRY {
while (!pj_scan_is_eof(&scanner)) {
cur_name = *scanner.curptr;
switch (cur_name) {
case 'a':
attr = parse_attr(pool, &scanner, &ctx);
if (attr) {
if (media) {
media->attr[media->attr_count++] = attr;
} else {
session->attr[session->attr_count++] = attr;
}
}
break;
case 'o':
parse_origin(&scanner, session, &ctx);
break;
case 's':
parse_generic_line(&scanner, &session->name, &ctx);
break;
case 'c':
conn = pj_pool_calloc(pool, 1, sizeof(*conn));
parse_connection_info(&scanner, conn, &ctx);
if (media) {
media->conn = conn;
} else {
session->conn = conn;
}
break;
case 't':
parse_time(&scanner, session, &ctx);
break;
case 'm':
media = pj_pool_calloc(pool, 1, sizeof(*media));
parse_media(&scanner, media, &ctx);
session->media[ session->media_count++ ] = media;
break;
case 'v':
parse_version(&scanner, &ctx);
break;
case 13:
/* Allow empty newline at the end of the message */
pj_scan_get_char(&scanner);
/* Continue below */
case 10:
pj_scan_get_char(&scanner);
if (!pj_scan_is_eof(&scanner)) {
on_scanner_error(&scanner);
}
break;
default:
if (cur_name >= 'a' && cur_name <= 'z')
parse_generic_line(&scanner, &dummy, &ctx);
else {
ctx.last_error = PJMEDIA_SDP_EINSDP;
on_scanner_error(&scanner);
}
break;
}
}
ctx.last_error = PJ_SUCCESS;
}
PJ_CATCH(SYNTAX_ERROR) {
char errmsg[PJ_ERR_MSG_SIZE];
pj_strerror(ctx.last_error, errmsg, sizeof(errmsg));
PJ_LOG(4, (THIS_FILE, "Error parsing SDP in line %d col %d: %s",
scanner.line, pj_scan_get_col(&scanner),
errmsg));
session = NULL;
pj_assert(ctx.last_error != PJ_SUCCESS);
}
PJ_END;
pj_scan_fini(&scanner);
*p_sdp = session;
return ctx.last_error;
}
/*
* Parse SDP message.
*/
PJ_DEF(pj_status_t) pjmedia_sdp_parse( pj_pool_t *pool,
char *buf, pj_size_t len,
pjmedia_sdp_session **p_sdp)
{
pj_scanner scanner;
pjmedia_sdp_session *session;
pjmedia_sdp_media *media = NULL;
pjmedia_sdp_attr *attr;
pjmedia_sdp_conn *conn;
pjmedia_sdp_bandw *bandw;
pj_str_t dummy;
int cur_name = 254;
parse_context ctx;
PJ_USE_EXCEPTION;
ctx.last_error = PJ_SUCCESS;
init_sdp_parser();
pj_scan_init(&scanner, buf, len, 0, &on_scanner_error);
session = PJ_POOL_ZALLOC_T(pool, pjmedia_sdp_session);
PJ_ASSERT_RETURN(session != NULL, PJ_ENOMEM);
/* Ignore leading newlines */
while (*scanner.curptr=='\r' || *scanner.curptr=='\n')
pj_scan_get_char(&scanner);
PJ_TRY {
while (!pj_scan_is_eof(&scanner)) {
cur_name = *scanner.curptr;
switch (cur_name) {
case 'a':
attr = parse_attr(pool, &scanner, &ctx);
if (attr) {
if (media) {
if (media->attr_count < PJMEDIA_MAX_SDP_ATTR)
pjmedia_sdp_media_add_attr(media, attr);
else
PJ_PERROR(2, (THIS_FILE, PJ_ETOOMANY,
"Error adding media attribute, "
"attribute is ignored"));
} else {
if (session->attr_count < PJMEDIA_MAX_SDP_ATTR)
pjmedia_sdp_session_add_attr(session, attr);
else
PJ_PERROR(2, (THIS_FILE, PJ_ETOOMANY,
"Error adding session attribute"
", attribute is ignored"));
}
}
break;
case 'o':
parse_origin(&scanner, session, &ctx);
break;
case 's':
parse_generic_line(&scanner, &session->name, &ctx);
break;
case 'c':
conn = PJ_POOL_ZALLOC_T(pool, pjmedia_sdp_conn);
parse_connection_info(&scanner, conn, &ctx);
if (media) {
media->conn = conn;
} else {
session->conn = conn;
}
break;
case 't':
parse_time(&scanner, session, &ctx);
break;
case 'm':
media = PJ_POOL_ZALLOC_T(pool, pjmedia_sdp_media);
parse_media(&scanner, media, &ctx);
if (session->media_count < PJMEDIA_MAX_SDP_MEDIA)
session->media[ session->media_count++ ] = media;
else
PJ_PERROR(2,(THIS_FILE, PJ_ETOOMANY,
"Error adding media, media is ignored"));
break;
case 'v':
parse_version(&scanner, &ctx);
break;
case 13:
case 10:
pj_scan_get_char(&scanner);
/* Allow empty newlines at the end of the message */
while (!pj_scan_is_eof(&scanner)) {
if (*scanner.curptr != 13 && *scanner.curptr != 10) {
ctx.last_error = PJMEDIA_SDP_EINSDP;
on_scanner_error(&scanner);
}
pj_scan_get_char(&scanner);
}
break;
case 'b':
bandw = PJ_POOL_ZALLOC_T(pool, pjmedia_sdp_bandw);
parse_bandwidth_info(&scanner, bandw, &ctx);
if (media) {
if (media->bandw_count < PJMEDIA_MAX_SDP_BANDW)
media->bandw[media->bandw_count++] = bandw;
else
PJ_PERROR(2, (THIS_FILE, PJ_ETOOMANY,
"Error adding media bandwidth "
"info, info is ignored"));
} else {
if (session->bandw_count < PJMEDIA_MAX_SDP_BANDW)
session->bandw[session->bandw_count++] = bandw;
else
PJ_PERROR(2, (THIS_FILE, PJ_ETOOMANY,
"Error adding session bandwidth "
"info, info is ignored"));
}
break;
default:
if (cur_name >= 'a' && cur_name <= 'z')
parse_generic_line(&scanner, &dummy, &ctx);
else {
ctx.last_error = PJMEDIA_SDP_EINSDP;
on_scanner_error(&scanner);
}
break;
}
}
ctx.last_error = PJ_SUCCESS;
}
PJ_CATCH_ANY {
char errmsg[PJ_ERR_MSG_SIZE];
pj_strerror(ctx.last_error, errmsg, sizeof(errmsg));
PJ_LOG(4, (THIS_FILE, "Error parsing SDP in line %d col %d: %s",
scanner.line, pj_scan_get_col(&scanner),
errmsg));
session = NULL;
pj_assert(ctx.last_error != PJ_SUCCESS);
}
PJ_END;
pj_scan_fini(&scanner);
if (session)
apply_media_direction(session);
*p_sdp = session;
return ctx.last_error;
}
int get_pos_col() const
{
return pj_scan_get_col(&scanner_);
}
