section-stringbuffer: Raptor RDF Syntax Library Manual

## section-stringbuffer section-stringbuffer |

## Functions

raptor_stringbuffer * | raptor_new_stringbuffer ()
void | raptor_free_stringbuffer ()
int | raptor_stringbuffer_append_counted_string ()
int | raptor_stringbuffer_append_decimal ()
int | raptor_stringbuffer_append_hexadecimal ()
int | raptor_stringbuffer_append_string ()
int | raptor_stringbuffer_append_stringbuffer ()
int | raptor_stringbuffer_append_uri_escaped_counted_string ()
int | raptor_stringbuffer_prepend_counted_string ()
int | raptor_stringbuffer_prepend_string ()
unsigned char * | raptor_stringbuffer_as_string ()
size_t | raptor_stringbuffer_length ()
int | raptor_stringbuffer_copy_to_string ()
int | raptor_stringbuffer_write ()

## Types and Values

typedef | raptor_stringbuffer

## Description

## Functions

### raptor_new_stringbuffer ()

    raptor_stringbuffer *
    raptor_new_stringbuffer (void);

Create a new stringbuffer.

#### Returns

pointer to a raptor_stringbuffer object or NULL on failure

### raptor_free_stringbuffer ()

    void
    raptor_free_stringbuffer (raptor_stringbuffer *stringbuffer);

Destroy a stringbuffer.

#### Parameters

stringbuffer | stringbuffer object to destroy. |

### raptor_stringbuffer_append_counted_string ()

    int
    raptor_stringbuffer_append_counted_string
                                   (raptor_stringbuffer *stringbuffer,
                                    const char *string,
                                    size_t length,
                                    int do_copy);

Add a counted string to the stringbuffer.

If `string` is NULL or `length` is 0, no work is performed.

If `do_copy` is non-0, the passed-in string is copied into new memory otherwise the stringbuffer becomes the owner of the string pointer and will free it when the stringbuffer is destroyed.

#### Parameters

stringbuffer | raptor stringbuffer |
string | string |
length | length of string |
do_copy | non-0 to copy the string |

#### Returns

non-0 on failure

### raptor_stringbuffer_append_decimal ()

    int
    raptor_stringbuffer_append_decimal (raptor_stringbuffer *stringbuffer,
                                        int integer);

Add an integer in decimal to the stringbuffer.

#### Parameters

stringbuffer | raptor stringbuffer |
integer | integer to format as decimal and add |

#### Returns

non-0 on failure

### raptor_stringbuffer_append_hexadecimal ()

    int
    raptor_stringbuffer_append_hexadecimal
                                   (raptor_stringbuffer *stringbuffer,
                                    int hex);

Add an integer formatted in hexdecimal (base 16) to the stringbuffer.

#### Parameters

stringbuffer | raptor stringbuffer |
hex | integer to format |

#### Returns

non-0 on failure

### raptor_stringbuffer_append_string ()

    int
    raptor_stringbuffer_append_string (raptor_stringbuffer *stringbuffer,
                                       const char *string,
                                       int do_copy);

Add a string to the stringbuffer.

If `string` is NULL, no work is performed.

If `do_copy` is non-0, the passed-in string is copied into new memory otherwise the stringbuffer becomes the owner of the string pointer and will free it when the stringbuffer is destroyed.

#### Parameters

stringbuffer | raptor stringbuffer |
string | string |
do_copy | non-0 to copy the string |

#### Returns

non-0 on failure

### raptor_stringbuffer_append_stringbuffer ()

    int
    raptor_stringbuffer_append_stringbuffer
                                   (raptor_stringbuffer *stringbuffer,
                                    raptor_stringbuffer *append);

Add a stringbuffer to the stringbuffer.

This function removes the content from the appending stringbuffer, making it empty and appends it to the supplied stringbuffer.

#### Parameters

stringbuffer | raptor_stringbuffer |
append | raptor_stringbuffer to append |

#### Returns

non-0 on failure

### raptor_stringbuffer_append_uri_escaped_counted_string ()

    int
    raptor_stringbuffer_append_uri_escaped_counted_string
                                   (raptor_stringbuffer *sb,
                                    const char *string,
                                    size_t length,
                                    int space_is_plus);

Add a URI-escaped version of `string` to the stringbuffer.

If `string` is NULL or `length` is 0, no work is performed.

#### Parameters

sb | raptor stringbuffer |
string | string |
length | length of string |
space_is_plus | if non-0, escape spaces as '+' otherwise percent-encode them |

#### Returns

non-0 on failure

### raptor_stringbuffer_prepend_counted_string ()

    int
    raptor_stringbuffer_prepend_counted_string
                                   (raptor_stringbuffer *stringbuffer,
                                    const char *string,
                                    size_t length,
                                    int do_copy);

If do_copy is non-0, the passed-in string is copied into new memory otherwise the stringbuffer becomes the owner of the string pointer and will free it when the stringbuffer is destroyed.

Add a string to the start of the stringbuffer.

#### Parameters

stringbuffer | raptor stringbuffer |
string | string |
length | length of string |
do_copy | non-0 to copy the string |

#### Returns

non-0 on failure

### raptor_stringbuffer_prepend_string ()

    int
    raptor_stringbuffer_prepend_string (raptor_stringbuffer *stringbuffer,
                                        const char *string,
                                        int do_copy);

Add a string to the start of the stringbuffer.

If do_copy is non-0, the passed-in string is copied into new memory otherwise the stringbuffer becomes the owner of the string pointer and will free it when the stringbuffer is destroyed.

#### Parameters

stringbuffer | raptor stringbuffer |
string | string |
do_copy | non-0 to copy the string |

#### Returns

non-0 on failure

### raptor_stringbuffer_as_string ()

    unsigned char *
    raptor_stringbuffer_as_string (raptor_stringbuffer *stringbuffer);

Return the stringbuffer as a C string.

Note: the return value is a to a shared string that the stringbuffer allocates and manages.

#### Parameters

stringbuffer | raptor stringbuffer |

#### Returns

NULL on failure or stringbuffer is empty, otherwise a pointer to a shared copy of the string.

### raptor_stringbuffer_length ()

    size_t
    raptor_stringbuffer_length (raptor_stringbuffer *stringbuffer);

Return the stringbuffer length.

#### Parameters

stringbuffer | raptor stringbuffer |

#### Returns

size of stringbuffer

### raptor_stringbuffer_copy_to_string ()

    int
    raptor_stringbuffer_copy_to_string (raptor_stringbuffer *stringbuffer,
                                        unsigned char *string,
                                        size_t length);

Copy the stringbuffer into a string.

Copies the underlying string to a pre-allocated buffer. The output string is always '\0' terminated.

#### Parameters

stringbuffer | raptor stringbuffer |
string | output string |
length | size of output string |

#### Returns

non-0 on failure such as stringbuffer is empty, buffer is too small

### raptor_stringbuffer_write ()

    int
    raptor_stringbuffer_write (raptor_stringbuffer *sb,
                               raptor_iostream *iostr);

Write a stringbuffer to an iostream.

#### Parameters

sb | raptor_stringbuffer to write |
iostr | raptor iostream |

#### Returns

non-0 on failure

## Types and Values

### raptor_stringbuffer

    raptor_stringbuffer* raptor_stringbuffer;

Raptor string buffer class