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def.h: Provide hton* / ntoh* functions to users by default for compatibility (can be turned off)

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Add note to UPGRADING document
This commit is contained in:
Dirk Ziegelmeier 2016-10-06 13:13:10 +02:00
parent 13fb616bb2
commit 05419912e0
2 changed files with 12 additions and 0 deletions
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4
UPGRADING
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@ -49,6 +49,10 @@ with newer versions.
* Added generalized abstraction for itoa(), strnicmp(), stricmp() and strnstr()
in def.h (to be overridden in cc.h) instead of config
options for netbiosns, httpd, dns, etc. ...
* New abstraction for hton* and ntoh* functions in def.h.
To override them, use the following in cc.h:
#define lwip_htons(x) <your_htons>
#define lwip_htonl(x) <your_htonl>
+++ new options:
* TODO

8
src/include/lwip/def.h
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@ -92,6 +92,14 @@ u32_t lwip_htonl(u32_t x);
#endif
#define lwip_ntohl(x) lwip_htonl(x)
/* Provide usual function names as macros for users, but this can be turned off */
#ifndef LWIP_DONT_PROVIDE_BYTEORDER_FUNCTIONS
#define htons(x) lwip_htons(x)
#define ntohs(x) lwip_ntohs(x)
#define htonl(x) lwip_htonl(x)
#define ntohl(x) lwip_ntohl(x)
#endif
/* These macros should be calculated by the preprocessor and are used
with compile-time constants only (so that there is no little-endian
overhead at runtime). */