Protocol Buffers - Google's data interchange format (grpc依赖)
https://developers.google.com/protocol-buffers/
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74 lines
2.8 KiB
74 lines
2.8 KiB
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#include "upb/pb/varint.int.h" |
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/* Index is descriptor type. */ |
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const uint8_t upb_pb_native_wire_types[] = { |
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UPB_WIRE_TYPE_END_GROUP, /* ENDGROUP */ |
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UPB_WIRE_TYPE_64BIT, /* DOUBLE */ |
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UPB_WIRE_TYPE_32BIT, /* FLOAT */ |
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UPB_WIRE_TYPE_VARINT, /* INT64 */ |
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UPB_WIRE_TYPE_VARINT, /* UINT64 */ |
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UPB_WIRE_TYPE_VARINT, /* INT32 */ |
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UPB_WIRE_TYPE_64BIT, /* FIXED64 */ |
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UPB_WIRE_TYPE_32BIT, /* FIXED32 */ |
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UPB_WIRE_TYPE_VARINT, /* BOOL */ |
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UPB_WIRE_TYPE_DELIMITED, /* STRING */ |
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UPB_WIRE_TYPE_START_GROUP, /* GROUP */ |
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UPB_WIRE_TYPE_DELIMITED, /* MESSAGE */ |
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UPB_WIRE_TYPE_DELIMITED, /* BYTES */ |
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UPB_WIRE_TYPE_VARINT, /* UINT32 */ |
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UPB_WIRE_TYPE_VARINT, /* ENUM */ |
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UPB_WIRE_TYPE_32BIT, /* SFIXED32 */ |
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UPB_WIRE_TYPE_64BIT, /* SFIXED64 */ |
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UPB_WIRE_TYPE_VARINT, /* SINT32 */ |
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UPB_WIRE_TYPE_VARINT, /* SINT64 */ |
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}; |
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/* A basic branch-based decoder, uses 32-bit values to get good performance |
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* on 32-bit architectures (but performs well on 64-bits also). |
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* This scheme comes from the original Google Protobuf implementation |
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* (proto2). */ |
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upb_decoderet upb_vdecode_max8_branch32(upb_decoderet r) { |
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upb_decoderet err = {NULL, 0}; |
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const char *p = r.p; |
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uint32_t low = (uint32_t)r.val; |
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uint32_t high = 0; |
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uint32_t b; |
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b = *(p++); low |= (b & 0x7fU) << 14; if (!(b & 0x80)) goto done; |
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b = *(p++); low |= (b & 0x7fU) << 21; if (!(b & 0x80)) goto done; |
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b = *(p++); low |= (b & 0x7fU) << 28; |
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high = (b & 0x7fU) >> 4; if (!(b & 0x80)) goto done; |
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b = *(p++); high |= (b & 0x7fU) << 3; if (!(b & 0x80)) goto done; |
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b = *(p++); high |= (b & 0x7fU) << 10; if (!(b & 0x80)) goto done; |
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b = *(p++); high |= (b & 0x7fU) << 17; if (!(b & 0x80)) goto done; |
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b = *(p++); high |= (b & 0x7fU) << 24; if (!(b & 0x80)) goto done; |
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b = *(p++); high |= (b & 0x7fU) << 31; if (!(b & 0x80)) goto done; |
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return err; |
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done: |
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r.val = ((uint64_t)high << 32) | low; |
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r.p = p; |
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return r; |
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} |
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/* Like the previous, but uses 64-bit values. */ |
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upb_decoderet upb_vdecode_max8_branch64(upb_decoderet r) { |
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const char *p = r.p; |
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uint64_t val = r.val; |
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uint64_t b; |
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upb_decoderet err = {NULL, 0}; |
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b = *(p++); val |= (b & 0x7fU) << 14; if (!(b & 0x80)) goto done; |
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b = *(p++); val |= (b & 0x7fU) << 21; if (!(b & 0x80)) goto done; |
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b = *(p++); val |= (b & 0x7fU) << 28; if (!(b & 0x80)) goto done; |
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b = *(p++); val |= (b & 0x7fU) << 35; if (!(b & 0x80)) goto done; |
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b = *(p++); val |= (b & 0x7fU) << 42; if (!(b & 0x80)) goto done; |
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b = *(p++); val |= (b & 0x7fU) << 49; if (!(b & 0x80)) goto done; |
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b = *(p++); val |= (b & 0x7fU) << 56; if (!(b & 0x80)) goto done; |
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b = *(p++); val |= (b & 0x7fU) << 63; if (!(b & 0x80)) goto done; |
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return err; |
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done: |
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r.val = val; |
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r.p = p; |
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return r; |
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}
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