Protocol Buffers - Google's data interchange format (grpc依赖) https://developers.google.com/protocol-buffers/
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#ifndef UPB_TEXTENCODE_H_
#define UPB_TEXTENCODE_H_
#include "upb/def.h"
#ifdef __cplusplus
extern "C" {
#endif
enum {
/* When set, prints everything on a single line. */
UPB_TXTENC_SINGLELINE = 1,
/* When set, unknown fields are not printed. */
UPB_TXTENC_SKIPUNKNOWN = 2
};
/* Encodes the given |msg| to text format. The message's reflection is given in
* |m|. The symtab in |symtab| is used to find extensions (if NULL, extensions
* will not be printed).
*
* Output is placed in the given buffer, and always NULL-terminated. The output
* size (excluding NULL) is returned. This means that a return value >= |size|
* implies that the output was truncated. (These are the same semantics as
* snprintf()). */
size_t upb_text_encode(const upb_msg *msg, const upb_msgdef *m,
const upb_symtab *ext_pool, int options, char *buf,
size_t size);
#ifdef __cplusplus
} /* extern "C" */
#endif
#endif /* UPB_TEXTENCODE_H_ */