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authorGravatar Denys Vlasenko <vda.linux@googlemail.com>2020-12-29 18:50:56 +0100
committerGravatar Denys Vlasenko <vda.linux@googlemail.com>2020-12-29 18:52:19 +0100
commit29a9043b36c9ca5a5d6f10fc183c7b7de0f979c7 (patch)
tree6a77b0d0c204d1180bdd92087911cfe5ef1b59f0
parentcba45d9b6586ff57c021911885930e6a415aa2c4 (diff)
downloadbusybox-29a9043b36c9ca5a5d6f10fc183c7b7de0f979c7.tar.gz
busybox-29a9043b36c9ca5a5d6f10fc183c7b7de0f979c7.tar.bz2
bc,dc: make BC_LINE_LENGTH/DC_LINE_LENGTH more compatible with GNU
function old new delta xc_vm_init 640 682 +42 Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
-rw-r--r--miscutils/bc.c38
-rw-r--r--testsuite/dc_add_results.txt36
-rw-r--r--testsuite/dc_decimal_results.txt42
-rw-r--r--testsuite/dc_divmod_results.txt8
-rw-r--r--testsuite/dc_multiply_results.txt4
-rw-r--r--testsuite/dc_power_results.txt72
-rw-r--r--testsuite/dc_subtract_results.txt14
7 files changed, 110 insertions, 104 deletions
diff --git a/miscutils/bc.c b/miscutils/bc.c
index 59e18a8c1..6d54f968a 100644
--- a/miscutils/bc.c
+++ b/miscutils/bc.c
@@ -231,7 +231,7 @@ typedef struct BcNum {
#define BC_NUM_MAX_IBASE 36
// larger value might speed up BIGNUM calculations a bit:
#define BC_NUM_DEF_SIZE 16
-#define BC_NUM_PRINT_WIDTH 69
+#define BC_NUM_PRINT_WIDTH 70
#define BC_NUM_KARATSUBA_LEN 32
@@ -7372,11 +7372,29 @@ static unsigned xc_vm_envLen(const char *var)
lenv = getenv(var);
len = BC_NUM_PRINT_WIDTH;
- if (!lenv) return len;
+ if (lenv) {
+ len = bb_strtou(lenv, NULL, 10);
+ if (len == 0 || len > INT_MAX)
+ len = INT_MAX;
+ if (errno)
+ len = BC_NUM_PRINT_WIDTH;
+ }
- len = bb_strtou(lenv, NULL, 10) - 1;
- if (errno || len < 2 || len >= INT_MAX)
- len = BC_NUM_PRINT_WIDTH;
+ // dc (GNU bc 1.07.1) 1.4.1 seems to use width
+ // 1 char wider than bc from the same package.
+ // Both default width, and xC_LINE_LENGTH=N are wider:
+ // "DC_LINE_LENGTH=5 dc -e'123456 p'" prints:
+ // |1234\ |
+ // |56 |
+ // "echo '123456' | BC_LINE_LENGTH=5 bc" prints:
+ // |123\ |
+ // |456 |
+ // Do the same, but it might be a bug in GNU package
+ if (IS_BC)
+ len--;
+
+ if (len < 2)
+ len = IS_BC ? BC_NUM_PRINT_WIDTH - 1 : BC_NUM_PRINT_WIDTH;
return len;
}
@@ -7467,16 +7485,6 @@ int dc_main(int argc UNUSED_PARAM, char **argv)
INIT_G();
- // TODO: dc (GNU bc 1.07.1) 1.4.1 seems to use width
- // 1 char wider than bc from the same package.
- // Both default width, and xC_LINE_LENGTH=N are wider:
- // "DC_LINE_LENGTH=5 dc -e'123456 p'" prints:
- // |1234\ |
- // |56 |
- // "echo '123456' | BC_LINE_LENGTH=5 bc" prints:
- // |123\ |
- // |456 |
- // Do the same, or it's a bug?
xc_vm_init("DC_LINE_LENGTH");
// Run -e'SCRIPT' and -fFILE in order of appearance, then handle FILEs
diff --git a/testsuite/dc_add_results.txt b/testsuite/dc_add_results.txt
index 542a62ea3..2d955935f 100644
--- a/testsuite/dc_add_results.txt
+++ b/testsuite/dc_add_results.txt
@@ -9,9 +9,9 @@
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@@ -20,21 +20,21 @@
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diff --git a/testsuite/dc_decimal_results.txt b/testsuite/dc_decimal_results.txt
index 275d431c6..66bb91ac3 100644
--- a/testsuite/dc_decimal_results.txt
+++ b/testsuite/dc_decimal_results.txt
@@ -9,19 +9,17 @@
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@@ -31,21 +29,21 @@
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diff --git a/testsuite/dc_divmod_results.txt b/testsuite/dc_divmod_results.txt
index c55e9303d..ee91ee88c 100644
--- a/testsuite/dc_divmod_results.txt
+++ b/testsuite/dc_divmod_results.txt
@@ -58,8 +58,8 @@
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-.0000000000000000000000000000000000000000000000000000000000000001907\
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0
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@@ -121,6 +121,6 @@
100864416620775
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0
-.0000000000000000000000000000000000000000000184866017689020776005643\
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diff --git a/testsuite/dc_multiply_results.txt b/testsuite/dc_multiply_results.txt
index 9666059a5..aaf3a20fc 100644
--- a/testsuite/dc_multiply_results.txt
+++ b/testsuite/dc_multiply_results.txt
@@ -15,8 +15,8 @@
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diff --git a/testsuite/dc_power_results.txt b/testsuite/dc_power_results.txt
index 997f44f59..dc5d56766 100644
--- a/testsuite/dc_power_results.txt
+++ b/testsuite/dc_power_results.txt
@@ -10,15 +10,15 @@
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@@ -31,27 +31,27 @@
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diff --git a/testsuite/dc_subtract_results.txt b/testsuite/dc_subtract_results.txt
index 9f7726254..0a9762381 100644
--- a/testsuite/dc_subtract_results.txt
+++ b/testsuite/dc_subtract_results.txt
@@ -8,15 +8,15 @@
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