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|
/**********************************************************************
*
* Prototypes
*
**********************************************************************/
static enum CbcTagId get_tag_id(const char *tag);
static TAG_SET(ByteOrder);
static TAG_GET(ByteOrder);
static TAG_VERIFY(ByteOrder);
static enum CbcTagByteOrder GetTagByteOrder(const char *t);
static TAG_INIT(Dimension);
static TAG_CLONE(Dimension);
static TAG_FREE(Dimension);
static TAG_SET(Dimension);
static TAG_GET(Dimension);
static TAG_VERIFY(Dimension);
static TAG_SET(Format);
static TAG_GET(Format);
static TAG_VERIFY(Format);
static enum CbcTagFormat GetTagFormat(const char *t);
static TAG_INIT(Hooks);
static TAG_CLONE(Hooks);
static TAG_FREE(Hooks);
static TAG_SET(Hooks);
static TAG_GET(Hooks);
/**********************************************************************
*
* Tag IDs
*
**********************************************************************/
static const char *gs_TagIdStr[] = {
"ByteOrder",
"Dimension",
"Format",
"Hooks",
"<<INVALID>>"
};
/**********************************************************************
*
* Dimension Vtable
*
**********************************************************************/
static CtTagVtable gs_Dimension_vtable = {
Dimension_Init,
Dimension_Clone,
Dimension_Free
};
/**********************************************************************
*
* Hooks Vtable
*
**********************************************************************/
static CtTagVtable gs_Hooks_vtable = {
Hooks_Init,
Hooks_Clone,
Hooks_Free
};
/**********************************************************************
*
* Tag Method Table
*
**********************************************************************/
static const struct tag_tbl_ent {
TagSetMethod set;
TagGetMethod get;
TagVerifyMethod verify;
CtTagVtable *vtbl;
} gs_TagTbl[] = {
{ ByteOrder_Set, ByteOrder_Get, ByteOrder_Verify, NULL },
{ Dimension_Set, Dimension_Get, Dimension_Verify, &gs_Dimension_vtable },
{ Format_Set, Format_Get, Format_Verify, NULL },
{ Hooks_Set, Hooks_Get, NULL, &gs_Hooks_vtable },
{NULL, NULL, NULL, NULL}
};
/**********************************************************************
*
* Main Tag Tokenizer
*
**********************************************************************/
static enum CbcTagId get_tag_id(const char *tag)
{
switch (tag[0])
{
case 'B':
if (tag[1] == 'y' &&
tag[2] == 't' &&
tag[3] == 'e' &&
tag[4] == 'O' &&
tag[5] == 'r' &&
tag[6] == 'd' &&
tag[7] == 'e' &&
tag[8] == 'r' &&
tag[9] == '\0')
{ /* ByteOrder */
return CBC_TAG_BYTE_ORDER;
}
goto unknown;
case 'D':
if (tag[1] == 'i' &&
tag[2] == 'm' &&
tag[3] == 'e' &&
tag[4] == 'n' &&
tag[5] == 's' &&
tag[6] == 'i' &&
tag[7] == 'o' &&
tag[8] == 'n' &&
tag[9] == '\0')
{ /* Dimension */
return CBC_TAG_DIMENSION;
}
goto unknown;
case 'F':
if (tag[1] == 'o' &&
tag[2] == 'r' &&
tag[3] == 'm' &&
tag[4] == 'a' &&
tag[5] == 't' &&
tag[6] == '\0')
{ /* Format */
return CBC_TAG_FORMAT;
}
goto unknown;
case 'H':
if (tag[1] == 'o' &&
tag[2] == 'o' &&
tag[3] == 'k' &&
tag[4] == 's' &&
tag[5] == '\0')
{ /* Hooks */
return CBC_TAG_HOOKS;
}
goto unknown;
default:
goto unknown;
}
unknown:
return CBC_INVALID_TAG;
}
/**********************************************************************
*
* ByteOrder Tokenizer
*
**********************************************************************/
static enum CbcTagByteOrder GetTagByteOrder(const char *t)
{
switch (t[0])
{
case 'B':
if (t[1] == 'i' &&
t[2] == 'g' &&
t[3] == 'E' &&
t[4] == 'n' &&
t[5] == 'd' &&
t[6] == 'i' &&
t[7] == 'a' &&
t[8] == 'n' &&
t[9] == '\0')
{ /* BigEndian */
return CBC_TAG_BYTE_ORDER_BIG_ENDIAN;
}
goto unknown;
case 'L':
if (t[1] == 'i' &&
t[2] == 't' &&
t[3] == 't' &&
t[4] == 'l' &&
t[5] == 'e' &&
t[6] == 'E' &&
t[7] == 'n' &&
t[8] == 'd' &&
t[9] == 'i' &&
t[10] == 'a' &&
t[11] == 'n' &&
t[12] == '\0')
{ /* LittleEndian */
return CBC_TAG_BYTE_ORDER_LITTLE_ENDIAN;
}
goto unknown;
default:
goto unknown;
}
unknown:
return CBC_INVALID_BYTE_ORDER;
}
/**********************************************************************
*
* Format Tokenizer
*
**********************************************************************/
static enum CbcTagFormat GetTagFormat(const char *t)
{
switch (t[0])
{
case 'B':
if (t[1] == 'i' &&
t[2] == 'n' &&
t[3] == 'a' &&
t[4] == 'r' &&
t[5] == 'y' &&
t[6] == '\0')
{ /* Binary */
return CBC_TAG_FORMAT_BINARY;
}
goto unknown;
case 'S':
if (t[1] == 't' &&
t[2] == 'r' &&
t[3] == 'i' &&
t[4] == 'n' &&
t[5] == 'g' &&
t[6] == '\0')
{ /* String */
return CBC_TAG_FORMAT_STRING;
}
goto unknown;
default:
goto unknown;
}
unknown:
return CBC_INVALID_FORMAT;
}
/**********************************************************************
*
* ByteOrder Set/Get Methods
*
**********************************************************************/
static TAG_SET(ByteOrder)
{
if (SvOK(val))
{
if (SvROK(val))
Perl_croak(aTHX_ "Value for ByteOrder tag must not be a reference");
else
{
const char *valstr = SvPV_nolen(val);
enum CbcTagByteOrder ByteOrder = GetTagByteOrder(valstr);
if (ByteOrder == CBC_INVALID_BYTE_ORDER)
Perl_croak(aTHX_ "Invalid value '%s' for ByteOrder tag", valstr);
tag->flags = ByteOrder;
return TSRV_UPDATE;
}
}
return TSRV_DELETE;
}
static TAG_GET(ByteOrder)
{
static const char *val[] = {
"BigEndian",
"LittleEndian"
};
if (tag->flags >= sizeof(val) / sizeof(val[0]))
fatal("Invalid value (%d) for ByteOrder tag", tag->flags);
return newSVpv(val[tag->flags], 0);
}
/**********************************************************************
*
* Format Set/Get Methods
*
**********************************************************************/
static TAG_SET(Format)
{
if (SvOK(val))
{
if (SvROK(val))
Perl_croak(aTHX_ "Value for Format tag must not be a reference");
else
{
const char *valstr = SvPV_nolen(val);
enum CbcTagFormat Format = GetTagFormat(valstr);
if (Format == CBC_INVALID_FORMAT)
Perl_croak(aTHX_ "Invalid value '%s' for Format tag", valstr);
tag->flags = Format;
return TSRV_UPDATE;
}
}
return TSRV_DELETE;
}
static TAG_GET(Format)
{
static const char *val[] = {
"String",
"Binary"
};
if (tag->flags >= sizeof(val) / sizeof(val[0]))
fatal("Invalid value (%d) for Format tag", tag->flags);
return newSVpv(val[tag->flags], 0);
}
|
