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authorIndrajith K L2022-12-03 17:00:20 +0530
committerIndrajith K L2022-12-03 17:00:20 +0530
commitf5c4671bfbad96bf346bd7e9a21fc4317b4959df (patch)
tree2764fc62da58f2ba8da7ed341643fc359873142f /coreutils-5.3.0-bin/share/awk/strtonum.awk
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Adds most of the toolsHEADmaster
Diffstat (limited to 'coreutils-5.3.0-bin/share/awk/strtonum.awk')
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1 files changed, 56 insertions, 0 deletions
diff --git a/coreutils-5.3.0-bin/share/awk/strtonum.awk b/coreutils-5.3.0-bin/share/awk/strtonum.awk
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+++ b/coreutils-5.3.0-bin/share/awk/strtonum.awk
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+# strtonum --- convert string to number
+
+#
+# Arnold Robbins, arnold@skeeve.com, Public Domain
+# February, 2004
+
+function mystrtonum(str, ret, chars, n, i, k, c)
+{
+ if (str ~ /^0[0-7]*$/) {
+ # octal
+ n = length(str)
+ ret = 0
+ for (i = 1; i <= n; i++) {
+ c = substr(str, i, 1)
+ if ((k = index("01234567", c)) > 0)
+ k-- # adjust for 1-basing in awk
+
+ ret = ret * 8 + k
+ }
+ } else if (str ~ /^0[xX][0-9a-fA-f]+/) {
+ # hexadecimal
+ str = substr(str, 3) # lop off leading 0x
+ n = length(str)
+ ret = 0
+ for (i = 1; i <= n; i++) {
+ c = substr(str, i, 1)
+ c = tolower(c)
+ if ((k = index("0123456789", c)) > 0)
+ k-- # adjust for 1-basing in awk
+ else if ((k = index("abcdef", c)) > 0)
+ k += 9
+
+ ret = ret * 16 + k
+ }
+ } else if (str ~ /^[-+]?([0-9]+([.][0-9]*([Ee][0-9]+)?)?|([.][0-9]+([Ee][-+]?[0-9]+)?))$/) {
+ # decimal number, possibly floating point
+ ret = str + 0
+ } else
+ ret = "NOT-A-NUMBER"
+
+ return ret
+}
+
+# BEGIN { # gawk test harness
+# a[1] = "25"
+# a[2] = ".31"
+# a[3] = "0123"
+# a[4] = "0xdeadBEEF"
+# a[5] = "123.45"
+# a[6] = "1.e3"
+# a[7] = "1.32"
+# a[7] = "1.32E2"
+#
+# for (i = 1; i in a; i++)
+# print a[i], strtonum(a[i]), mystrtonum(a[i])
+# }