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Refactor GENERIC_RESOURCE macro

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Now callback functions get the URI of the request, this allows to use a
single resource for multiple different URIs.
The is_json flag is now gone for the to-string function, instead the
macro has an is_str flag. If set this automagically produces quotes
around the string for json output.
Now from-string functions can return an error-code, 0 for success, -1
for error.
This commit is contained in:
Ralf Schlatterbeck 2016-02-26 07:54:05 +01:00
parent c7daa7c45d
commit c6165a3bcf
9 changed files with 106 additions and 68 deletions
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12
apps/json-resource/generic_resource.h
View file

@ -50,6 +50,9 @@
#define STR__(s) #s
#define STR_(s) STR__(s)
#define MAX_GET_STRING_LENGTH 100
#define MAX_URI_STRING_LENGTH 30
/*
* A macro that extends the resource definition and also sets up the
* necessary handler function that calls format/parse routines that
@ -60,7 +63,7 @@
* Yes, this *is* a hack. But I hate boilerplate code.
*/
#define GENERIC_RESOURCE(name, title, unit, fs, ts) \
#define GENERIC_RESOURCE(name, title, unit, is_str, fs, ts) \
static void name##_get_handler \
( void *request \
, void *response \
@ -70,7 +73,7 @@
) \
{ \
generic_get_handler \
(request, response, buffer, ps, offset, STR_(name), ts); \
(request, response, buffer, ps, offset, STR_(name), is_str, ts); \
} \
static void name##_put_handler \
( void *request \
@ -134,7 +137,8 @@ extern void generic_get_handler
, uint16_t preferred_size
, int32_t *offset
, char *name
, size_t (*to_str)(const char *name, uint8_t is_json, char *buf, size_t bsize)
, int is_str
, size_t (*to_str)(const char *name, const char *uri, char *buf, size_t bsize)
);
/**
@ -157,7 +161,7 @@ extern void generic_put_handler
, uint16_t preferred_size
, int32_t *offset
, char *name
, void (*from_str)(const char *name, const char *s)
, int (*from_str)(const char *name, const char *uri, const char *s)
);
/*