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authorSverker Eriksson <[email protected]>2014-05-12 19:03:12 +0200
committerSverker Eriksson <[email protected]>2014-05-12 19:03:12 +0200
commit81e77a082ba1de759db17e9cbdb4b8cbe79c0d1b (patch)
tree3def7099ac661821337a02f8faabca7420f8bc6c /erts
parent07b8f441ca711f9812fad9e9115bab3c3aa92f79 (diff)
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erts: Make erlang:display show content of binaries
Diffstat (limited to 'erts')
-rw-r--r--erts/emulator/beam/erl_printf_term.c86
1 files changed, 79 insertions, 7 deletions
diff --git a/erts/emulator/beam/erl_printf_term.c b/erts/emulator/beam/erl_printf_term.c
index d18760dc43..1a0c7a9fc9 100644
--- a/erts/emulator/beam/erl_printf_term.c
+++ b/erts/emulator/beam/erl_printf_term.c
@@ -1,7 +1,7 @@
/*
* %CopyrightBegin%
*
- * Copyright Ericsson AB 2005-2013. All Rights Reserved.
+ * Copyright Ericsson AB 2005-2014. All Rights Reserved.
*
* The contents of this file are subject to the Erlang Public License,
* Version 1.1, (the "License"); you may not use this file except in
@@ -25,6 +25,7 @@
#include "sys.h"
#include "big.h"
#include "erl_map.h"
+#include "erl_binary.h"
#define PRINT_CHAR(CNT, FN, ARG, C) \
do { \
@@ -138,6 +139,25 @@ is_printable_string(Eterm list, Eterm* base)
return 0;
}
+static int is_printable_ascii(byte* bytep, Uint bytesize, Uint bitoffs)
+{
+ if (!bitoffs) {
+ while (bytesize--) {
+ if (*bytep < ' ' || *bytep >= 127)
+ return 0;
+ bytep++;
+ }
+ } else {
+ while (bytesize--) {
+ byte octet = (bytep[0] << bitoffs) | (bytep[1] >> (8-bitoffs));
+ if (octet < ' ' || octet >= 127)
+ return 0;
+ bytep++;
+ }
+ }
+ return 1;
+}
+
/* print a atom doing what quoting is necessary */
static int print_atom_name(fmtfn_t fn, void* arg, Eterm atom, long *dcount)
{
@@ -446,13 +466,65 @@ print_term(fmtfn_t fn, void* arg, Eterm obj, long *dcount,
PRINT_STRING(res, fn, arg, "#MatchState");
}
else {
- ProcBin* pb = (ProcBin *) binary_val(wobj);
- if (pb->size == 1)
- PRINT_STRING(res, fn, arg, "<<1 byte>>");
- else {
+ byte* bytep;
+ Uint bytesize = binary_size_rel(obj,obj_base);
+ Uint bitoffs;
+ Uint bitsize;
+ byte octet;
+ ERTS_GET_BINARY_BYTES_REL(obj, bytep, bitoffs, bitsize, obj_base);
+
+ if (bitsize || !bytesize
+ || !is_printable_ascii(bytep, bytesize, bitoffs)) {
+ int is_first = 1;
PRINT_STRING(res, fn, arg, "<<");
- PRINT_UWORD(res, fn, arg, 'u', 0, 1, (ErlPfUWord) pb->size);
- PRINT_STRING(res, fn, arg, " bytes>>");
+ while (bytesize) {
+ if (is_first)
+ is_first = 0;
+ else
+ PRINT_CHAR(res, fn, arg, ',');
+ if (bitoffs)
+ octet = (bytep[0] << bitoffs) | (bytep[1] >> (8-bitoffs));
+ else
+ octet = bytep[0];
+ PRINT_UWORD(res, fn, arg, 'u', 0, 1, octet);
+ ++bytep;
+ --bytesize;
+ }
+ if (bitsize) {
+ Uint bits = bitoffs + bitsize;
+ octet = bytep[0];
+ if (bits < 8)
+ octet >>= 8 - bits;
+ else if (bits > 8) {
+ bits -= 8; /* bits in last byte */
+ octet <<= bits;
+ octet |= bytep[1] >> (8 - bits);
+ }
+ octet &= (1 << bitsize) - 1;
+ if (is_first)
+ is_first = 0;
+ else
+ PRINT_CHAR(res, fn, arg, ',');
+ PRINT_UWORD(res, fn, arg, 'u', 0, 1, octet);
+ PRINT_CHAR(res, fn, arg, ':');
+ PRINT_UWORD(res, fn, arg, 'u', 0, 1, bitsize);
+ }
+ PRINT_STRING(res, fn, arg, ">>");
+ }
+ else {
+ PRINT_STRING(res, fn, arg, "<<\"");
+ while (bytesize) {
+ if (bitoffs)
+ octet = (bytep[0] << bitoffs) | (bytep[1] >> (8-bitoffs));
+ else
+ octet = bytep[0];
+ if (octet == '"')
+ PRINT_CHAR(res, fn, arg, '\\');
+ PRINT_CHAR(res, fn, arg, octet);
+ ++bytep;
+ --bytesize;
+ }
+ PRINT_STRING(res, fn, arg, "\">>");
}
}
break;