ArvZip

ArvZip — A simple zip extractor

Functions

Types and Values

  ArvZip

Description

Functions

arv_zip_new ()

ArvZip *
arv_zip_new (const void *buffer,
             size_t size);

[skip]

Parameters

buffer

zipped data

 

size

size of the zipped data

 

Returns

a new ArvZip instance


arv_zip_free ()

void
arv_zip_free (ArvZip *zip);

arv_zip_get_file ()

void *
arv_zip_get_file (ArvZip *zip,
                  const char *name,
                  size_t *size);

arv_zip_get_file_list ()

const GSList *
arv_zip_get_file_list (ArvZip *zip);

arv_zip_file_get_name ()

const char *
arv_zip_file_get_name (ArvZipFile *zip_file);

arv_zip_file_get_uncompressed_size ()

size_t
arv_zip_file_get_uncompressed_size (ArvZipFile *zip_file);

ARV_GUINT16_FROM_LE_PTR()

#define ARV_GUINT16_FROM_LE_PTR(ptr,offset) arv_guint16_from_unaligned_le_ptr (ptr, offset)

ARV_GUINT32_FROM_LE_PTR()

#define ARV_GUINT32_FROM_LE_PTR(ptr,offset) arv_guint32_from_unaligned_le_ptr (ptr, offset)

arv_guint16_from_unaligned_le_ptr ()

guint16
arv_guint16_from_unaligned_le_ptr (const char *ptr,
                                   gint16 offset);

See arv_guint32_from_unaligned_le_ptr .

Parameters

ptr

pointer to a little endian 16 bit usigned integer

 

offset

an offset to add to ptr

 

Returns

a guint16 in machine endianess


arv_guint32_from_unaligned_le_ptr ()

guint32
arv_guint32_from_unaligned_le_ptr (const char *ptr,
                                   gint32 offset);

Here's an excerpt of the ARM documentation:

"Unaligned data access in C and C++ code

It can be necessary to access unaligned data in memory, for example, when porting legacy code from a CISC architecture where instructions are available to directly access unaligned data in memory.

On ARMv4 and ARMv5 architectures, and on the ARMv6 architecture depending on how it is configured, care is required when accessing unaligned data in memory, to avoid unexpected results. For example, when a conventional pointer is used to read a word in C or C++ source code, the ARM compiler generates assembly language code that reads the word using an LDR instruction. This works as expected when the address is a multiple of four, for example if it lies on a word boundary. However, if the address is not a multiple of four, the LDR instruction returns a rotated result rather than performing a true unaligned word load. Generally, this rotation is not what the programmer expects.

On ARMv6 and later architectures, unaligned access is fully supported."

Parameters

ptr

pointer to a little endian 32 bit usigned integer

 

offset

an offset to add to ptr

 

Returns

a guint32 in machine endianess

Types and Values

ArvZip

typedef struct _ArvZip ArvZip;