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-rw-r--r--erts/emulator/beam/bif.c187
-rw-r--r--erts/emulator/beam/bif.tab3
2 files changed, 138 insertions, 52 deletions
diff --git a/erts/emulator/beam/bif.c b/erts/emulator/beam/bif.c
index a596068527..5adcf6d5c7 100644
--- a/erts/emulator/beam/bif.c
+++ b/erts/emulator/beam/bif.c
@@ -39,6 +39,7 @@
#include "erl_thr_progress.h"
#define ERTS_PTAB_WANT_BIF_IMPL__
#include "erl_ptab.h"
+#include "erl_bits.h"
static Export* flush_monitor_message_trap = NULL;
static Export* set_cpu_topology_trap = NULL;
@@ -2955,29 +2956,9 @@ BIF_RETTYPE list_to_integer_2(BIF_ALIST_2)
/**********************************************************************/
-/* convert a float to a list of ascii characters */
+static int do_float_to_charbuf(Process *p, Eterm efloat, Eterm list,
+ char *fbuf, int sizeof_fbuf) {
-BIF_RETTYPE float_to_list_1(BIF_ALIST_1)
-{
- int i;
- Uint need;
- Eterm* hp;
- FloatDef f;
- char fbuf[30];
-
- /* check the arguments */
- if (is_not_float(BIF_ARG_1))
- BIF_ERROR(BIF_P, BADARG);
- GET_DOUBLE(BIF_ARG_1, f);
- if ((i = sys_double_to_chars(f.fd, fbuf, sizeof(fbuf))) <= 0)
- BIF_ERROR(BIF_P, EXC_INTERNAL_ERROR);
- need = i*2;
- hp = HAlloc(BIF_P, need);
- BIF_RET(buf_to_intlist(&hp, fbuf, i, NIL));
-}
-
-BIF_RETTYPE float_to_list_2(BIF_ALIST_2)
-{
const static int arity_two = make_arityval(2);
int decimals = SYS_DEFAULT_FLOAT_DECIMALS;
int compact = 0;
@@ -2986,16 +2967,11 @@ BIF_RETTYPE float_to_list_2(BIF_ALIST_2)
FMT_FIXED,
FMT_SCIENTIFIC
} fmt_type = FMT_LEGACY;
- Eterm list = BIF_ARG_2;
Eterm arg;
- int i;
- Uint need;
- Eterm* hp;
FloatDef f;
- char fbuf[256];
/* check the arguments */
- if (is_not_float(BIF_ARG_1))
+ if (is_not_float(efloat))
goto badarg;
for(; is_list(list); list = CDR(list_val(list))) {
@@ -3023,22 +2999,64 @@ BIF_RETTYPE float_to_list_2(BIF_ALIST_2)
goto badarg;
}
- GET_DOUBLE(BIF_ARG_1, f);
+ GET_DOUBLE(efloat, f);
if (fmt_type == FMT_FIXED) {
- if ((i = sys_double_to_chars_fast(f.fd, fbuf, sizeof(fbuf),
- decimals, compact)) <= 0)
- goto badarg;
+ return sys_double_to_chars_fast(f.fd, fbuf, sizeof_fbuf,
+ decimals, compact);
} else {
- if ((i = sys_double_to_chars_ext(f.fd, fbuf, sizeof(fbuf), decimals)) <= 0)
- goto badarg;
+ return sys_double_to_chars_ext(f.fd, fbuf, sizeof_fbuf, decimals);
}
- need = i*2;
- hp = HAlloc(BIF_P, need);
- BIF_RET(buf_to_intlist(&hp, fbuf, i, NIL));
badarg:
+ return -1;
+}
+
+/* convert a float to a list of ascii characters */
+
+static BIF_RETTYPE do_float_to_list(Process *BIF_P, Eterm arg, Eterm opts) {
+ int used;
+ Eterm* hp;
+ char fbuf[256];
+
+ if ((used = do_float_to_charbuf(BIF_P,arg,opts,fbuf,sizeof(fbuf))) <= 0) {
BIF_ERROR(BIF_P, BADARG);
+ }
+ hp = HAlloc(BIF_P, (Uint)used*2);
+ BIF_RET(buf_to_intlist(&hp, fbuf, (Uint)used, NIL));
+}
+
+
+BIF_RETTYPE float_to_list_1(BIF_ALIST_1)
+{
+ return do_float_to_list(BIF_P,BIF_ARG_1,NIL);
+}
+
+BIF_RETTYPE float_to_list_2(BIF_ALIST_2)
+{
+ return do_float_to_list(BIF_P,BIF_ARG_1,BIF_ARG_2);
+}
+
+/* convert a float to a binary of ascii characters */
+
+static BIF_RETTYPE do_float_to_binary(Process *BIF_P, Eterm arg, Eterm opts) {
+ int used;
+ char fbuf[256];
+
+ if ((used = do_float_to_charbuf(BIF_P,arg,opts,fbuf,sizeof(fbuf))) <= 0) {
+ BIF_ERROR(BIF_P, BADARG);
+ }
+ BIF_RET(new_binary(BIF_P, (byte*)fbuf, (Uint)used));
+}
+
+BIF_RETTYPE float_to_binary_1(BIF_ALIST_1)
+{
+ return do_float_to_binary(BIF_P,BIF_ARG_1,NIL);
+}
+
+BIF_RETTYPE float_to_binary_2(BIF_ALIST_2)
+{
+ return do_float_to_binary(BIF_P,BIF_ARG_1,BIF_ARG_2);
}
/**********************************************************************/
@@ -3223,36 +3241,101 @@ BIF_RETTYPE string_to_float_1(BIF_ALIST_1)
BIF_RET(tup);
}
+static BIF_RETTYPE do_charbuf_to_float(Process *BIF_P,char *buf) {
+ FloatDef f;
+ Eterm res;
+ Eterm* hp;
+
+ if (sys_chars_to_double(buf, &f.fd) != 0)
+ BIF_ERROR(BIF_P, BADARG);
+
+ hp = HAlloc(BIF_P, FLOAT_SIZE_OBJECT);
+ res = make_float(hp);
+ PUT_DOUBLE(f, hp);
+ BIF_RET(res);
+
+}
BIF_RETTYPE list_to_float_1(BIF_ALIST_1)
{
int i;
- FloatDef f;
Eterm res;
- Eterm* hp;
char *buf = NULL;
i = list_length(BIF_ARG_1);
- if (i < 0) {
- badarg:
- if (buf)
- erts_free(ERTS_ALC_T_TMP, (void *) buf);
- BIF_ERROR(BIF_P, BADARG);
- }
-
+ if (i < 0)
+ BIF_ERROR(BIF_P, BADARG);
+
buf = (char *) erts_alloc(ERTS_ALC_T_TMP, i + 1);
if (intlist_to_buf(BIF_ARG_1, buf, i) < 0)
- goto badarg;
+ goto list_to_float_1_error;
buf[i] = '\0'; /* null terminal */
+
+ if ((res = do_charbuf_to_float(BIF_P,buf)) == THE_NON_VALUE)
+ goto list_to_float_1_error;
+
+ erts_free(ERTS_ALC_T_TMP, (void *) buf);
+ BIF_RET(res);
+
+ list_to_float_1_error:
+ erts_free(ERTS_ALC_T_TMP, (void *) buf);
+ BIF_ERROR(BIF_P, BADARG);
+
+}
+
+BIF_RETTYPE binary_to_float_1(BIF_ALIST_1)
+{
+ Eterm res;
+ Eterm binary = BIF_ARG_1;
+ Sint size;
+ byte* bytes, *buf;
+ Eterm* real_bin;
+ Uint offs = 0;
+ Uint bit_offs = 0;
+
+ if (is_not_binary(binary) || (size = binary_size(binary)) == 0)
+ BIF_ERROR(BIF_P, BADARG);
+
+ /*
+ * Unfortunately we have to copy the binary because we have to insert
+ * the '\0' at the end of the binary for strtod to work
+ * (there is no nstrtod :( )
+ */
+
+ buf = erts_alloc(ERTS_ALC_T_TMP, size + 1);
+
+ real_bin = binary_val(binary);
+ if (*real_bin == HEADER_SUB_BIN) {
+ ErlSubBin* sb = (ErlSubBin *) real_bin;
+ if (sb->bitsize) {
+ goto binary_to_float_1_error;
+ }
+ offs = sb->offs;
+ bit_offs = sb->bitoffs;
+ real_bin = binary_val(sb->orig);
+ }
+ if (*real_bin == HEADER_PROC_BIN) {
+ bytes = ((ProcBin *) real_bin)->bytes + offs;
+ } else {
+ bytes = (byte *)(&(((ErlHeapBin *) real_bin)->data)) + offs;
+ }
+ if (bit_offs)
+ erts_copy_bits(bytes, bit_offs, 1, buf, 0, 1, size*8);
+ else
+ memcpy(buf, bytes, size);
+
+ buf[size] = '\0';
+
+ if ((res = do_charbuf_to_float(BIF_P,(char*)buf)) == THE_NON_VALUE)
+ goto binary_to_float_1_error;
- if (sys_chars_to_double(buf, &f.fd) != 0)
- goto badarg;
- hp = HAlloc(BIF_P, FLOAT_SIZE_OBJECT);
- res = make_float(hp);
- PUT_DOUBLE(f, hp);
erts_free(ERTS_ALC_T_TMP, (void *) buf);
BIF_RET(res);
+
+ binary_to_float_1_error:
+ erts_free(ERTS_ALC_T_TMP, (void *) buf);
+ BIF_ERROR(BIF_P, BADARG);
}
/**********************************************************************/
diff --git a/erts/emulator/beam/bif.tab b/erts/emulator/beam/bif.tab
index aa6105de73..b74dc5c3fe 100644
--- a/erts/emulator/beam/bif.tab
+++ b/erts/emulator/beam/bif.tab
@@ -565,6 +565,9 @@ bif erlang:binary_to_integer/1
bif erlang:binary_to_integer/2
bif erlang:integer_to_binary/1
bif erlang:list_to_integer/2
+bif erlang:float_to_binary/1
+bif erlang:float_to_binary/2
+bif erlang:binary_to_float/1
#
# Obsolete
generated by cgit v1.2.3 (git 2.25.1) at 2024-11-23 13:46:47 +0000