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authortv <tv@nomic.retiolum>2013-09-11 19:43:44 +0200
committertv <tv@nomic.retiolum>2013-09-11 19:43:44 +0200
commit6e4e2fa779b641711977ab921615ce3c803276c0 (patch)
treee9251e12bf94037ef6e4c100c695f39d10d154ac /ledger/lib
parentb0845d5b495fdbdf38c6959395dbd74e114cbccd (diff)
ledger balance: initial commit
Diffstat (limited to 'ledger/lib')
-rwxr-xr-xledger/lib/balance73
1 files changed, 73 insertions, 0 deletions
diff --git a/ledger/lib/balance b/ledger/lib/balance
new file mode 100755
index 00000000..8d84dd7b
--- /dev/null
+++ b/ledger/lib/balance
@@ -0,0 +1,73 @@
+#! /bin/awk -f
+#
+# usage: [colorize=false] [scale=N] //ledger/lib/balance LEDGER_FILE
+# see also: //cholerab/ledger-spec.markdown
+#
+
+BEGIN {
+ colorize = ENVIRON["colorize"] == "" || ENVIRON["colorize"] == "true"
+ # TODO use bc for arbitrary precision arithmetic
+ scale = ENVIRON["scale"]
+}
+
+/^[[:space:]]*[0-9]+-[0-9][0-9]-[0-9][0-9]/{
+ tx($2, $3, $4, $5)
+}
+
+END {
+ display_accounts()
+}
+
+function tx (dst, src, amt, u) {
+ withdraw(src, amt, u)
+ deposit(dst, amt, u)
+}
+
+function deposit (name, amt, u) {
+ accounts[name][u] += amt
+}
+
+function withdraw (name, amt, u) {
+ accounts[name][u] -= amt
+}
+
+function display_accounts() {
+ max_name_len = 0
+ for (name in accounts) {
+ if (length(name) > max_name_len) {
+ max_name_len = length(name)
+ }
+ }
+
+ max_balance_len = 0
+ for (name in accounts) {
+ for (u in accounts[name]) {
+ s = accounts[name][u]
+ sub(/\..*/, "", s)
+ if (length(s) > max_balance_len) {
+ max_balance_len = length(s)
+ }
+ }
+ }
+ if (scale > 0) {
+ max_balance_len += 1 + scale
+ }
+
+ for (name in accounts) {
+ for (u in accounts[name]) {
+
+ fmt = "NAME BALANCE UNIT\n"
+ balance = accounts[name][u]
+
+ if (colorize) {
+ sub("BALANCE", "[" (balance < 0 ? 31 : 32) "m&", fmt)
+ }
+
+ sub("NAME", "%-" max_name_len "s", fmt)
+ sub("BALANCE", "%" max_balance_len "." scale "f", fmt)
+ sub("UNIT", "%s", fmt)
+
+ printf fmt, name, balance, u
+ }
+ }
+}