diff options
Diffstat (limited to 'examples/blobmsg-example.c')
-rw-r--r-- | examples/blobmsg-example.c | 163 |
1 files changed, 163 insertions, 0 deletions
diff --git a/examples/blobmsg-example.c b/examples/blobmsg-example.c new file mode 100644 index 0000000..c88f53a --- /dev/null +++ b/examples/blobmsg-example.c @@ -0,0 +1,163 @@ +#include <stdio.h> + +#include "blobmsg.h" + +static const char *indent_str = "\t\t\t\t\t\t\t\t\t\t\t\t\t"; + +#define indent_printf(indent, ...) do { \ + if (indent > 0) \ + fwrite(indent_str, indent, 1, stderr); \ + fprintf(stderr, __VA_ARGS__); \ +} while(0) + +static void dump_attr_data(void *data, int len, int type, int indent, int next_indent); + +static void +dump_array(struct blob_attr *head, int len, int indent) +{ + struct blob_attr *attr; + + indent_printf(indent, "{\n"); + __blob_for_each_attr(attr, head, len) { + dump_attr_data(blob_data(attr), blob_len(attr), blob_id(attr), indent + 1, indent + 1); + } + indent_printf(indent, "}\n"); +} + +static void +dump_table(struct blob_attr *head, int len, int indent) +{ + struct blob_attr *attr, *last_attr; + struct blobmsg_hdr *hdr; + + indent_printf(indent, "{\n"); + __blob_for_each_attr(attr, head, len) { + hdr = blob_data(attr); + indent_printf(indent + 1, "%s : ", hdr->name); + dump_attr_data(blobmsg_data(attr), blobmsg_data_len(attr), blob_id(attr), 0, indent + 1); + last_attr = attr; + } + indent_printf(indent, "}\n"); +} + +static void dump_attr_data(void *data, int len, int type, int indent, int next_indent) +{ + switch(type) { + case BLOBMSG_TYPE_STRING: + indent_printf(indent, "%s\n", (char *) data); + break; + case BLOBMSG_TYPE_INT8: + indent_printf(indent, "%d\n", *(uint8_t *)data); + break; + case BLOBMSG_TYPE_INT16: + indent_printf(indent, "%d\n", *(uint16_t *)data); + break; + case BLOBMSG_TYPE_INT32: + indent_printf(indent, "%d\n", *(uint32_t *)data); + break; + case BLOBMSG_TYPE_INT64: + indent_printf(indent, "%lld\n", *(uint64_t *)data); + break; + case BLOBMSG_TYPE_TABLE: + if (!indent) + indent_printf(indent, "\n"); + dump_table(data, len, next_indent); + break; + case BLOBMSG_TYPE_ARRAY: + if (!indent) + indent_printf(indent, "\n"); + dump_array(data, len, next_indent); + break; + } +} + +enum { + FOO_MESSAGE, + FOO_LIST, + FOO_TESTDATA +}; + +static const struct blobmsg_policy pol[] = { + [FOO_MESSAGE] = { + .name = "message", + .type = BLOBMSG_TYPE_STRING, + }, + [FOO_LIST] = { + .name = "list", + .type = BLOBMSG_TYPE_ARRAY, + }, + [FOO_TESTDATA] = { + .name = "testdata", + .type = BLOBMSG_TYPE_TABLE, + }, +}; + +#ifndef ARRAY_SIZE +#define ARRAY_SIZE(x) (sizeof(x) / sizeof((x)[0])) +#endif + +static void dump_message(struct blob_buf *buf) +{ + struct blob_attr *tb[ARRAY_SIZE(pol)]; + + if (blobmsg_parse(pol, ARRAY_SIZE(pol), tb, blob_data(buf->head), blob_len(buf->head)) != 0) { + fprintf(stderr, "Parse failed\n"); + return; + } + if (tb[FOO_MESSAGE]) + fprintf(stderr, "Message: %s\n", (char *) blobmsg_data(tb[FOO_MESSAGE])); + + if (tb[FOO_LIST]) { + fprintf(stderr, "List: "); + dump_array(blobmsg_data(tb[FOO_LIST]), blob_len(tb[FOO_LIST]), 0); + } + if (tb[FOO_TESTDATA]) { + fprintf(stderr, "Testdata: "); + dump_table(blobmsg_data(tb[FOO_TESTDATA]), blob_len(tb[FOO_TESTDATA]), 0); + } +} + +static void +fill_message(struct blob_buf *buf) +{ + void *tbl; +#if 0 + int i; +#endif + + blobmsg_add_string(buf, "message", "Hello, world!"); + + tbl = blobmsg_open_array(buf, "list"); + blobmsg_add_u32(buf, NULL, 0); + blobmsg_add_u32(buf, NULL, 1); + blobmsg_add_u32(buf, NULL, 2); + blobmsg_close_table(buf, tbl); + + tbl = blobmsg_open_table(buf, "testdata"); + blobmsg_add_u32(buf, "hello", 1); + blobmsg_add_string(buf, "world", "2"); + blobmsg_close_table(buf, tbl); + +#if 0 + for (i = 0; i < buf->buflen; i++) { + if (i % 0x10 == 0) + fprintf(stderr, "\n"); + fprintf(stderr, "%02x ", ((uint8_t *) buf->buf)[i]); + } + fprintf(stderr, "\n"); +#endif +} + +int main(int argc, char **argv) +{ + static struct blob_buf buf; + + blobmsg_buf_init(&buf); + fill_message(&buf); + dump_message(&buf); + + if (buf.buf) + free(buf.buf); + + return 0; +} |