91 lines
2.5 KiB
C
91 lines
2.5 KiB
C
|
/**
|
||
|
|
* @file
|
||
|
|
* Simple parser for "key = value" text files, by zamaz.
|
||
|
|
*
|
||
|
|
* Can also manage the following weird cases:
|
||
|
|
*
|
||
|
|
* @code
|
||
|
|
* # comment
|
||
|
|
* # empty lines are ignored
|
||
|
|
* foo = bar # comment
|
||
|
|
* b\
|
||
|
|
* lah = blah ; rah=meh
|
||
|
|
* 'with spaces' = "with\ncr"
|
||
|
|
*
|
||
|
|
* \x2a = 'do not eat \x2a in simple quotes,'" here we can \x2a"
|
||
|
|
*
|
||
|
|
* # EOF
|
||
|
|
* @endcode
|
||
|
|
*/
|
||
|
|
|
||
|
|
#ifndef CKVP_H_
|
||
|
|
#define CKVP_H_
|
||
|
|
|
||
|
|
#include <stddef.h>
|
||
|
|
|
||
|
|
#ifdef __cplusplus
|
||
|
|
#define CKVP_DECL_BEGIN__ extern "C" {
|
||
|
|
#define CKVP_DECL_END__ }
|
||
|
|
#else
|
||
|
|
#define CKVP_DECL_BEGIN__
|
||
|
|
#define CKVP_DECL_END__
|
||
|
|
#endif
|
||
|
|
|
||
|
|
CKVP_DECL_BEGIN__
|
||
|
|
|
||
|
|
#define CKVP_OUT_SIZE 511
|
||
|
|
#define CKVP_OUT_SIZE_STR "511"
|
||
|
|
#define CKVP_INIT { CKVP_NONE, 1, 1, 0x0002, 0, "" }
|
||
|
|
|
||
|
|
/**
|
||
|
|
* ckvp_t stores the state, it must be initialized with CKVP_INIT before
|
||
|
|
* being fed to ckvp_parse().
|
||
|
|
*
|
||
|
|
* When "state" reaches CKVP_OUT_FULL, "out_size" is equal to CKVP_OUT_SIZE
|
||
|
|
* ("out" is full), and ckvp_parse() won't process any more characters until
|
||
|
|
* "out_size" is reset.
|
||
|
|
*/
|
||
|
|
typedef struct {
|
||
|
|
unsigned int state; /**< Parsing status */
|
||
|
|
unsigned int line; /**< Current line */
|
||
|
|
unsigned int column; /**< Current column */
|
||
|
|
unsigned int internal; /**< Internal state */
|
||
|
|
size_t out_size; /**< Number of characters in "out" */
|
||
|
|
/**
|
||
|
|
* Output buffer. Be careful, this buffer not NUL-terminated.
|
||
|
|
*/
|
||
|
|
char out[(CKVP_OUT_SIZE + 1)]; /* hack: this +1 saves room for \0 */
|
||
|
|
} ckvp_t;
|
||
|
|
|
||
|
|
/**
|
||
|
|
* Possible states (previously defined in an enum, but C++ didn't like it)
|
||
|
|
*/
|
||
|
|
#define CKVP_NONE 0 /**< Nothing to report */
|
||
|
|
#define CKVP_OUT_FULL 1 /**< Buffer "out" is full, must be flushed */
|
||
|
|
#define CKVP_OUT_KEY 2 /**< Everything stored until now is a key */
|
||
|
|
#define CKVP_OUT_VALUE 3 /**< Everything stored until now is a value */
|
||
|
|
#define CKVP_ERROR 4 /**< Error status, check line/column */
|
||
|
|
|
||
|
|
/**
|
||
|
|
* ckvp_parse() takes the current state (ckvp), a buffer in[size] and returns
|
||
|
|
* the number of characters processed.
|
||
|
|
*
|
||
|
|
* Each time ckvp_parse() returns, ckvp->state must be checked. If no error
|
||
|
|
* occured, ckvp_parse() must be called again with the remaining characters
|
||
|
|
* if any, otherwise the next input buffer.
|
||
|
|
*
|
||
|
|
* At the end of input, ckvp_parse() must be called with a zero size.
|
||
|
|
*
|
||
|
|
* This function doesn't allocate anything.
|
||
|
|
*
|
||
|
|
* @param[in,out] ckvp Current state.
|
||
|
|
* @param size Number of characters in buffer "in".
|
||
|
|
* @param in Input buffer to parse.
|
||
|
|
* @return Number of characters processed.
|
||
|
|
*/
|
||
|
|
extern size_t ckvp_parse(ckvp_t *ckvp, size_t size, const char in[]);
|
||
|
|
|
||
|
|
CKVP_DECL_END__
|
||
|
|
|
||
|
|
#endif /* CKVP_H_ */
|