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authorSteve Vinoski <[email protected]>2010-10-06 11:28:08 -0400
committerSteve Vinoski <[email protected]>2010-10-06 11:28:08 -0400
commit386050e35675d3e4336f48a19b8562f9a62c1624 (patch)
tree8be3626133c7e7d696640f6c315b4d1dfcf3db7f /lib/erl_interface/src/misc
parentd8f8eeba477fd8872f1136fc507fa299f013cc46 (diff)
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teach ei_x_format to handle unary - and +
Teach the format string parser used for ei_x_format() and ei_x_format_wo_ver() about unary negative and positive operators on numbers. Previously, passing a negative numeric constant or a positive numeric constant with an explicit leading plus sign within the format string would cause these functions to fail. Augment the format_wo_ver unit test in the ei_format suite with a regression test for these cases. An easy way to reproduce the problem is to use erl_call: erl_call -s foo@bar -a 'erlang list_to_integer [-1]' Without this change, erl_call fails with a -1 exit status. With this change, it properly prints "-1".
Diffstat (limited to 'lib/erl_interface/src/misc')
-rw-r--r--lib/erl_interface/src/misc/ei_format.c4
1 files changed, 4 insertions, 0 deletions
diff --git a/lib/erl_interface/src/misc/ei_format.c b/lib/erl_interface/src/misc/ei_format.c
index 08235d0ebe..b35421d4b2 100644
--- a/lib/erl_interface/src/misc/ei_format.c
+++ b/lib/erl_interface/src/misc/ei_format.c
@@ -106,6 +106,8 @@ static int eiformat(const char** fmt, union arg** args, ei_x_buff* x)
default:
if (isdigit((int)*p))
res = pdigit(&p, x);
+ else if ((*p == '-' || *p == '+') && isdigit((int)*(p+1)))
+ res = pdigit(&p, x);
else if (islower((int)*p))
res = patom(&p, x);
else
@@ -149,6 +151,8 @@ static int pdigit(const char** fmt, ei_x_buff* x)
double d;
long l;
+ if (**fmt == '-' || **fmt == '+')
+ (*fmt)++;
for (;;) {
c = *(*fmt)++;
if (isdigit((int)c))