Mercurial > hg
annotate mercurial/compat.h @ 39814:d059cb669632
wireprotov2: allow multiple fields to follow revision maps
The *data wire protocol commands emit a series of CBOR values.
Because revision/delta data may be large, their data is emitted
outside the map as a top-level bytestring value.
Before this commit, we'd emit a single optional bytestring
value after the revision descriptor map. This got the job done.
But it was limiting in that we could only send a single field.
And, it required the consumer to know that the presence of a
key in the map implied the existence of a following bytestring
value.
This commit changes the encoding strategy so top-level bytestring
values in the stream are explicitly denoted in a "fieldsfollowing"
key. This key contains an array defining what fields that follow
and the expected size of each field.
By defining things this way, we can easily send N bytestring
values without any ambiguity about their order. In addition,
clients only need to know how to parse ``fieldsfollowing`` to
know if extra values are present.
Because this breaks backwards compatibility, we've bumped the version
number of the wire protocol version 2 API endpoint.
Differential Revision: https://phab.mercurial-scm.org/D4620
author | Gregory Szorc <gregory.szorc@gmail.com> |
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date | Thu, 20 Sep 2018 12:57:23 -0700 |
parents | 11ed2eadf937 |
children | d86908050375 |
rev | line source |
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1 #ifndef _HG_COMPAT_H_ |
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2 #define _HG_COMPAT_H_ |
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3 |
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4 #ifdef _WIN32 |
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5 #ifdef _MSC_VER |
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6 #if _MSC_VER < 1900 |
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7 /* msvc 6.0 has problems */ |
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8 #define inline __inline |
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9 #if defined(_WIN64) |
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10 typedef __int64 ssize_t; |
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11 typedef unsigned __int64 uintptr_t; |
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12 #else |
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13 typedef int ssize_t; |
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14 typedef unsigned int uintptr_t; |
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15 #endif |
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16 typedef signed char int8_t; |
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17 typedef short int16_t; |
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18 typedef long int32_t; |
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19 typedef __int64 int64_t; |
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20 typedef unsigned char uint8_t; |
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21 typedef unsigned short uint16_t; |
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22 typedef unsigned long uint32_t; |
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23 typedef unsigned __int64 uint64_t; |
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24 #else |
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25 /* VC++ 14 */ |
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26 #include <stdint.h> |
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27 |
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28 #if defined(_WIN64) |
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29 typedef __int64 ssize_t; |
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30 #else |
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31 typedef int ssize_t; |
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32 #endif |
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33 #endif /* _MSC_VER < 1900 */ |
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34 |
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35 #else |
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36 /* not msvc */ |
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37 #include <stdint.h> |
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38 #endif |
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39 #else |
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40 /* not windows */ |
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41 #include <sys/types.h> |
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42 #if defined __BEOS__ && !defined __HAIKU__ |
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43 #include <ByteOrder.h> |
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44 #else |
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45 #include <arpa/inet.h> |
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46 #endif |
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47 #include <inttypes.h> |
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48 #endif |
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49 |
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50 #if defined __hpux || defined __SUNPRO_C || defined _AIX |
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51 #define inline |
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52 #endif |
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53 |
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54 #ifdef __linux |
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55 #define inline __inline |
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56 #endif |
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57 |
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58 #endif |