|  |  |  | GNU Libidn API Reference Manual |  | 
|---|
| pr29pr29 — | 
enum Pr29_rc; const char* pr29_strerror (Pr29_rc rc); int pr29_4 (const uint32_t *in, size_t len); int pr29_4z (const uint32_t *in); int pr29_8z (const char *in);
  typedef enum
  {
    PR29_SUCCESS = 0,
    PR29_PROBLEM = 1,		/* String is a problem sequence. */
    PR29_STRINGPREP_ERROR = 2	/* Charset conversion failed (p29_8*). */
  } Pr29_rc;
Enumerated return codes for pr29_4(), pr29_4z(), pr29_8z(). The value 0 is guaranteed to always correspond to success.
| PR29_SUCCESS | Successful operation. This value is guaranteed to always be zero, the remaining ones are only guaranteed to hold non-zero values, for logical comparison purposes. | 
| PR29_PROBLEM | A problem sequence was encountered. | 
| PR29_STRINGPREP_ERROR | The character set conversion failed (only for pr29_8() and pr29_8z()). | 
const char* pr29_strerror (Pr29_rc rc);
Convert a return code integer to a text string. This string can be used to output a diagnostic message to the user.
PR29_SUCCESS: Successful operation. This value is guaranteed to always be zero, the remaining ones are only guaranteed to hold non-zero values, for logical comparison purposes. PR29_PROBLEM: A problem sequence was encountered. PR29_STRINGPREP_ERROR: The character set conversion failed (only for pr29_8() and pr29_8z()).
| rc : | an Pr29_rc return code. | 
| Returns : | Returns a pointer to a statically allocated string containing a description of the error with the return code rc. | 
int         pr29_4                          (const uint32_t *in,
                                             size_t len);
Check the input to see if it may be normalized into different strings by different NFKC implementations, due to an anomaly in the NFKC specifications.
| in : | input array with unicode code points. | 
| len : | length of input array with unicode code points. | 
| Returns : | Returns the Pr29_rc value PR29_SUCCESS on success, and PR29_PROBLEM if the input sequence is a "problem sequence" (i.e., may be normalized into different strings by different implementations). | 
int pr29_4z (const uint32_t *in);
Check the input to see if it may be normalized into different strings by different NFKC implementations, due to an anomaly in the NFKC specifications.
| in : | zero terminated array of Unicode code points. | 
| Returns : | Returns the Pr29_rc value PR29_SUCCESS on success, and PR29_PROBLEM if the input sequence is a "problem sequence" (i.e., may be normalized into different strings by different implementations). | 
int pr29_8z (const char *in);
Check the input to see if it may be normalized into different strings by different NFKC implementations, due to an anomaly in the NFKC specifications.
| in : | zero terminated input UTF-8 string. | 
| Returns : | Returns the Pr29_rc value PR29_SUCCESS on success, and PR29_PROBLEM if the input sequence is a "problem sequence" (i.e., may be normalized into different strings by different implementations), or PR29_STRINGPREP_ERROR if there was a problem converting the string from UTF-8 to UCS-4. | 
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