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Added a core_fopen_ram_copy() call, similar to core_fopen_ram() except that it

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copies the memory
This commit is contained in:
Nathan Woods 2008-09-06 22:47:05 +00:00
parent c0b1419a96
commit f1d5b2a1ec
2 changed files with 38 additions and 4 deletions
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39
src/lib/util/corefile.c
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@ -133,11 +133,12 @@ file_error core_fopen(const char *filename, UINT32 openflags, core_file **file)
/*------------------------------------------------- /*-------------------------------------------------
core_fopen_ram - open a RAM-based buffer for core_fopen_ram_internal - open a RAM-based buffer
file-like access and return an error code for file-like access, possibly copying the data,
and return an error code
-------------------------------------------------*/ -------------------------------------------------*/
file_error core_fopen_ram(const void *data, size_t length, UINT32 openflags, core_file **file) static file_error core_fopen_ram_internal(const void *data, size_t length, int copy_buffer, UINT32 openflags, core_file **file)
{ {
/* can only do this for read access */ /* can only do this for read access */
if ((openflags & OPEN_FLAG_WRITE) != 0) if ((openflags & OPEN_FLAG_WRITE) != 0)
@ -146,11 +147,19 @@ file_error core_fopen_ram(const void *data, size_t length, UINT32 openflags, cor
return FILERR_INVALID_ACCESS; return FILERR_INVALID_ACCESS;
/* allocate the file itself */ /* allocate the file itself */
*file = malloc(sizeof(**file)); *file = malloc(sizeof(**file) + (copy_buffer ? length : 0));
if (*file == NULL) if (*file == NULL)
return FILERR_OUT_OF_MEMORY; return FILERR_OUT_OF_MEMORY;
memset(*file, 0, sizeof(**file)); memset(*file, 0, sizeof(**file));
/* copy the buffer, if we're asked to */
if (copy_buffer)
{
void *dest = ((UINT8 *) *file) + sizeof(**file);
memcpy(dest, data, length);
data = dest;
}
/* claim the buffer */ /* claim the buffer */
(*file)->data = (UINT8 *)data; (*file)->data = (UINT8 *)data;
(*file)->length = length; (*file)->length = length;
@ -160,6 +169,28 @@ file_error core_fopen_ram(const void *data, size_t length, UINT32 openflags, cor
} }
/*-------------------------------------------------
core_fopen_ram - open a RAM-based buffer for
file-like access and return an error code
-------------------------------------------------*/
file_error core_fopen_ram(const void *data, size_t length, UINT32 openflags, core_file **file)
{
return core_fopen_ram_internal(data, length, FALSE, openflags, file);
}
/*-------------------------------------------------
core_fopen_ram_copy - open a copy of a RAM-based
buffer for file-like access and return an error code
-------------------------------------------------*/
file_error core_fopen_ram_copy(const void *data, size_t length, UINT32 openflags, core_file **file)
{
return core_fopen_ram_internal(data, length, TRUE, openflags, file);
}
/*------------------------------------------------- /*-------------------------------------------------
core_fclose - closes a file core_fclose - closes a file
-------------------------------------------------*/ -------------------------------------------------*/

3
src/lib/util/corefile.h
View File

@ -49,6 +49,9 @@ file_error core_fopen(const char *filename, UINT32 openflags, core_file **file);
/* open a RAM-based "file" using the given data and length (read-only) */ /* open a RAM-based "file" using the given data and length (read-only) */
file_error core_fopen_ram(const void *data, size_t length, UINT32 openflags, core_file **file); file_error core_fopen_ram(const void *data, size_t length, UINT32 openflags, core_file **file);
/* open a RAM-based "file" using the given data and length (read-only), copying the data */
file_error core_fopen_ram_copy(const void *data, size_t length, UINT32 openflags, core_file **file);
/* close an open file */ /* close an open file */
void core_fclose(core_file *file); void core_fclose(core_file *file);