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changed the hcl_ioimpl_t prototype to return 'int' instead of 'hcl_ooi_t'.

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changed the io arguments to have a new 'xlen' field that holds the result of IO operations where 0 means end of stream
This commit is contained in:
hyung-hwan
2018-03-09 05:05:09 +00:00
parent a60bd0c898
commit 3acdae2cdf
4 changed files with 128 additions and 98 deletions
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41
lib/hcl.h
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@ -790,9 +790,14 @@ struct hcl_ioinarg_t
void* handle;
/**
* [OUT] place data here
* [OUT] place data here for #HCL_IO_READ
*/
hcl_ooch_t buf[1024];
hcl_ooch_t buf[2048];
/**
* [OUT] place the number of characters read here for #HCL_IO_READ
*/
hcl_oow_t xlen;
/**
* [IN] points to the data of the includer. It is #HCL_NULL for the
@ -804,7 +809,9 @@ struct hcl_ioinarg_t
/*----------- from here down, internal use only -------------------*/
struct
{
int pos, len, state;
hcl_oow_t pos;
hcl_oow_t len;
int state;
} b;
unsigned long int line;
@ -818,12 +825,36 @@ struct hcl_ioinarg_t
typedef struct hcl_iooutarg_t hcl_iooutarg_t;
struct hcl_iooutarg_t
{
/**
* [OUT] I/O handle set by a handler.
* The source stream handler can set this field when it opens a stream.
* All subsequent operations on the stream see this field as set
* during opening.
*/
void* handle;
/**
* [IN] the pointer to the beginning of the character string
* to write
*/
hcl_ooch_t* ptr;
hcl_oow_t len;
/**
* [IN] total number of characters to write
*/
hcl_oow_t len;
/**
* [OUT] place the number of characters written here for HCL_IO_WRITE
*/
hcl_oow_t xlen;
};
typedef hcl_ooi_t (*hcl_ioimpl_t) (
/**
* The hcl_ioimpl_t type defines a callback function prototype
* for I/O operations.
*/
typedef int (*hcl_ioimpl_t) (
hcl_t* hcl,
hcl_iocmd_t cmd,
void* arg /* hcl_ioinarg_t* or hcl_iooutarg_t* */