#include "hbytes.h"
#include "tables.h"
-#define SIZES \
- DO_SIZE(ulong, 4, 0xffffffffUL, \
- DO_BYTE(0,24) \
- DO_BYTE(1,16) \
- DO_BYTE(2,8) \
- DO_BYTE(3,0)) \
- DO_SIZE(ushort, 2, 0x0000ffffUL, \
- DO_BYTE(0,8) \
- DO_BYTE(1,0))
-
-#define DO_BYTE(index,shift) (data[index] << shift) |
-#define DO_SIZE(ulongint, len, max, bytes) \
- int do_hbytes_h2##ulongint(ClientData cd, Tcl_Interp *ip, \
- HBytes_Value hex, unsigned long *result) { \
- const Byte *data; \
- if (hbytes_len(&hex) != len) \
- return staticerr(ip, #ulongint " must be " #len " bytes"); \
- data= hbytes_data(&hex); \
- *result= (bytes 0); \
- return TCL_OK; \
- }
-SIZES
-#undef DO_BYTE
-#undef DO_SIZE
-
-#define DO_BYTE(index,shift) data[index]= (value >> shift);
-#define DO_SIZE(ulongint, len, max, bytes) \
- int do_hbytes_##ulongint##2h(ClientData cd, Tcl_Interp *ip, \
- unsigned long value, HBytes_Value *result) { \
- Byte *data; \
- if (value > max) return staticerr(ip, #ulongint " too big"); \
- data= hbytes_arrayspace(result,len); \
- bytes \
- return TCL_OK; \
+/* nice simple functions */
+
+int do_ulong_int2ul(ClientData cd, Tcl_Interp *ip, int v,
+ uint32_t *result) {
+ if (v<0) return
+ staticerr(ip,"cannot convert -ve integer to ulong","ULONG VALUE NEGATIVE");
+ *result= v;
+ return TCL_OK;
+}
+
+int do_ulong_add(ClientData cd, Tcl_Interp *ip,
+ uint32_t a, uint32_t b, uint32_t *result) {
+ *result= a + b;
+ return TCL_OK;
+}
+
+int do_ulong_multiply(ClientData cd, Tcl_Interp *ip,
+ uint32_t a, uint32_t b, uint32_t *result) {
+ *result= a * b;
+ return TCL_OK;
+}
+
+int do_ulong_subtract(ClientData cd, Tcl_Interp *ip,
+ uint32_t a, uint32_t b, uint32_t *result) {
+ *result= a - b;
+ return TCL_OK;
+}
+
+int do_ulong_compare(ClientData cd, Tcl_Interp *ip,
+ uint32_t a, uint32_t b, int *result) {
+ *result=
+ a == b ? 0 :
+ a < b ? -1 : 1;
+ return TCL_OK;
+}
+
+int do_ulong_ul2int(ClientData cd, Tcl_Interp *ip,
+ uint32_t v, int *result) {
+ if (v>INT_MAX) return
+ staticerr(ip,"ulong too large to fit in an int", "ULONG VALUE OVERFLOW");
+ *result= v;
+ return TCL_OK;
+}
+
+int do_ulong_mask(ClientData cd, Tcl_Interp *ip,
+ uint32_t a, uint32_t b, uint32_t *result) {
+ *result= a & b;
+ return TCL_OK;
+}
+
+int do_ulong_shift(ClientData cd, Tcl_Interp *ip, int right,
+ uint32_t v, int bits, uint32_t *result) {
+ if (bits < 0) { bits= -bits; right= !right; }
+ if (bits > 32) return
+ staticerr(ip,"shift out of range (32) bits", "ULONG BITCOUNT OVERRUN");
+ *result= (bits==32 ? 0 :
+ right ? v >> bits : v << bits);
+ return TCL_OK;
+}
+
+/* bitfields */
+
+typedef struct {
+ const char *name;
+ int want_arg;
+ int (*reader_writer[2])(Tcl_Interp *ip, uint32_t *value_io,
+ int *ok_io, Tcl_Obj *arg);
+} BitFieldType;
+
+static int bf_zero_read(Tcl_Interp *ip, uint32_t *value_io,
+ int *ok_io, Tcl_Obj *arg) {
+ if (*value_io) *ok_io= 0;
+ return TCL_OK;
+}
+
+static int bf_zero_write(Tcl_Interp *ip, uint32_t *value_io,
+ int *ok_io, Tcl_Obj *arg) {
+ *value_io= 0;
+ return TCL_OK;
+}
+
+static int bf_ignore(Tcl_Interp *ip, uint32_t *value_io,
+ int *ok_io, Tcl_Obj *arg) {
+ return TCL_OK;
+}
+
+static int bf_fixed_read(Tcl_Interp *ip, uint32_t *value_io,
+ int *ok_io, Tcl_Obj *arg) {
+ uint32_t ul;
+ int rc;
+
+ rc= pat_ulong(ip, arg, &ul); if (rc) return rc;
+ if (*value_io != ul) *ok_io= 0;
+ return TCL_OK;
+}
+
+static int bf_ulong_write(Tcl_Interp *ip, uint32_t *value_io,
+ int *ok_io, Tcl_Obj *arg) {
+ uint32_t ul;
+ int rc;
+
+ rc= pat_ulong(ip, arg, &ul); if (rc) return rc;
+ *value_io= ul;
+ return TCL_OK;
+}
+
+static int bf_var_read(Tcl_Interp *ip, Tcl_Obj *varname, Tcl_Obj *val) {
+ Tcl_Obj *rp;
+ rp= Tcl_ObjSetVar2(ip,varname,0,val,TCL_LEAVE_ERR_MSG);
+ if (!rp) return TCL_ERROR;
+ return TCL_OK;
+}
+
+static int bf_ulong_read(Tcl_Interp *ip, uint32_t *value_io,
+ int *ok_io, Tcl_Obj *arg) {
+ return bf_var_read(ip,arg, ret_ulong(ip,*value_io));
+}
+
+static int bf_uint_write(Tcl_Interp *ip, uint32_t *value_io,
+ int *ok_io, Tcl_Obj *arg) {
+ int rc, v;
+ rc= pat_int(ip, arg, &v); if (rc) return rc;
+ if (v<0) return
+ staticerr(ip,"value for bitfield is -ve", "ULONG VALUE NEGATIVE");
+ *value_io= v;
+ return TCL_OK;
+}
+
+static int bf_uint_read(Tcl_Interp *ip, uint32_t *value_io,
+ int *ok_io, Tcl_Obj *arg) {
+ if (*value_io > INT_MAX) return
+ staticerr(ip,"value from bitfield exceeds INT_MAX","ULONG VALUE OVERFLOW");
+ return bf_var_read(ip,arg, ret_int(ip,*value_io));
+}
+
+#define BFT(t,a) { #t, a, { bf_read_##t, bf_write_##t } }
+static const BitFieldType bitfieldtypes[]= {
+ { "zero", 0, { bf_zero_read, bf_zero_write } },
+ { "ignore", 0, { bf_ignore, bf_ignore } },
+ { "fixed", 1, { bf_fixed_read, bf_ulong_write } },
+ { "ulong", 1, { bf_ulong_read, bf_ulong_write } },
+ { "uint", 1, { bf_uint_read, bf_uint_write } },
+ { 0 }
+};
+
+static int do_bitfields(Tcl_Interp *ip, int writing, int *ok_r,
+ uint32_t *value_io,
+ int objc, Tcl_Obj *const *objv) {
+ const BitFieldType *ftype;
+ Tcl_Obj *arg;
+ int sz, pos, rc;
+ uint32_t value, sz_mask, this_mask, this_field;
+
+ pos= 32;
+ value= *value_io;
+ *ok_r= 1;
+
+ while (--objc) {
+ rc= Tcl_GetIntFromObj(ip,*++objv,&sz); if (rc) return rc;
+ if (!--objc) return staticerr(ip,"wrong # args: missing bitfield type",0);
+
+ if (sz<0)
+ return staticerr(ip,"bitfield size is -ve", "ULONG BITCOUNT NEGATIVE");
+ if (sz>pos) return
+ staticerr(ip,"total size of bitfields >32", "ULONG BITCOUNT OVERRUN");
+
+ pos -= sz;
+
+ sz_mask= ~(~0UL << sz);
+ this_mask= (sz_mask << pos);
+ this_field= (value & this_mask) >> pos;
+
+ ftype= enum_lookup_cached(ip,*++objv,bitfieldtypes,"bitfield type");
+ if (!ftype) return TCL_ERROR;
+
+ if (ftype->want_arg) {
+ if (!--objc)
+ return staticerr(ip,"wrong # args: missing arg for bitfield",0);
+ arg= *++objv;
+ } else {
+ arg= 0;
+ }
+ rc= ftype->reader_writer[writing](ip, &this_field, ok_r, arg);
+ if (rc) return rc;
+
+ if (!*ok_r) return TCL_OK;
+
+ if (this_field & ~sz_mask)
+ return staticerr(ip,"bitfield value has more bits than bitfield",
+ "ULONG VALUE OVERFLOW");
+
+ value &= ~this_mask;
+ value |= (this_field << pos);
}
-SIZES
-#undef DO_BYTE
-#undef DO_SIZE
-int pat_ulong(Tcl_Interp *ip, Tcl_Obj *obj, unsigned long *val) {
- char *str, *ep;
+ if (pos != 0) return
+ staticerr(ip,"bitfield sizes add up to <32","ULONG BITCOUNT UNDERRUN");
- str= Tcl_GetString(obj);
- errno= 0;
- *val= strtoul(str,&ep,0);
- if (*ep || errno) return staticerr(ip, "bad unsigned value");
+ *value_io= value;
return TCL_OK;
}
-Tcl_Obj *ret_ulong(Tcl_Interp *ip, unsigned long val) {
- char buf[11];
+int do_ulong_bitfields2ul(ClientData cd, Tcl_Interp *ip,
+ uint32_t base,
+ int objc, Tcl_Obj *const *objv,
+ uint32_t *result) {
+ int ok, rc;
+
+ *result= base;
+ rc= do_bitfields(ip,1,&ok,result,objc,objv);
+ assert(ok);
+ return rc;
+}
+
+int do_ulong_ul2bitfields(ClientData cd, Tcl_Interp *ip,
+ uint32_t value,
+ int objc, Tcl_Obj *const *objv,
+ int *result) {
+ return do_bitfields(ip,0,result,&value,objc,objv);
+}
+
+/* Arg parsing */
+
+int pat_ulong(Tcl_Interp *ip, Tcl_Obj *o, uint32_t *val) {
+ int rc;
+
+ rc= Tcl_ConvertToType(ip,o,&ulong_type);
+ if (rc) return rc;
+ *val= *(const uint32_t*)&o->internalRep.longValue;
+ return TCL_OK;
+}
+
+Tcl_Obj *ret_ulong(Tcl_Interp *ip, uint32_t val) {
+ Tcl_Obj *o;
+
+ o= Tcl_NewObj();
+ Tcl_InvalidateStringRep(o);
+ *(uint32_t*)&o->internalRep.longValue= val;
+ o->typePtr= &ulong_type;
+ return o;
+}
+
+/* Tcl ulong type */
+
+static void ulong_t_free(Tcl_Obj *o) { }
+
+static void ulong_t_dup(Tcl_Obj *src, Tcl_Obj *dup) {
+ dup->internalRep= src->internalRep;
+ dup->typePtr= &ulong_type;
+}
+
+static void ulong_t_ustr(Tcl_Obj *o) {
+ uint32_t val;
+ char buf[9];
+
+ val= *(const uint32_t*)&o->internalRep.longValue;
+
assert(val <= 0xffffffffUL);
- snprintf(buf,sizeof(buf), "0x%08lx", val);
- return Tcl_NewStringObj(buf,sizeof(buf)-1);
+ snprintf(buf,sizeof(buf), "%08lx", (unsigned long)val);
+
+ obj_updatestr_vstringls(o, buf, sizeof(buf)-1, (char*)0);
}
+
+static int ulong_t_sfa(Tcl_Interp *ip, Tcl_Obj *o) {
+ char *str, *ep;
+ uint32_t ul;
+
+ if (o->typePtr == &hbytes_type) {
+ int l;
+
+ l= hbytes_len(OBJ_HBYTES(o));
+ if (l > 4) return
+ staticerr(ip,"hbytes as ulong with length >4","HBYTES LENGTH OVERRUN");
+ ul= 0;
+ memcpy((Byte*)&ul + 4 - l, hbytes_data(OBJ_HBYTES(o)), l);
+ ul= htonl(ul);
+
+ } else {
+
+ str= Tcl_GetString(o);
+ errno=0;
+ if (str[0]=='0' && str[1]=='b' && str[2]) {
+ ul= strtoul(str+2,&ep,2);
+ } else if (str[0]=='0' && str[1]=='d' && str[2]) {
+ ul= strtoul(str+2,&ep,10);
+ } else {
+ ul= strtoul(str,&ep,16);
+ }
+ if (*ep || errno) return staticerr(ip, "bad unsigned long value", 0);
+
+ }
+
+ objfreeir(o);
+ *(uint32_t*)&o->internalRep.longValue= ul;
+ o->typePtr= &ulong_type;
+ return TCL_OK;
+}
+
+Tcl_ObjType ulong_type = {
+ "ulong-nearly",
+ ulong_t_free, ulong_t_dup, ulong_t_ustr, ulong_t_sfa
+};
~ian / chiark-tcl.git / blobdiff