84 lines
2.4 KiB
Plaintext
84 lines
2.4 KiB
Plaintext
// ═══════════════════════════════════════════════════════════
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// logger.ks
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// CSV logger with buffered writes.
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//
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// Usage:
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// local log to loggerCreate("0:/logs/flight.csv", list("time", "altitude", "apoapsis")).
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// loggerUpdate(log, list(time:seconds, altitude, apoapsis)).
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// loggerFlush(log). // call at end of script to flush remaining buffer
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// ═══════════════════════════════════════════════════════════
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// ── Creates a logger and writes the CSV header.
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// Parameters:
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// filePath : string — destination path, e.g. "0:/logs/flight.csv"
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// columns : list — ordered list of column name strings
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// flushPeriod : scalar — seconds between buffer flushes (default 1.0)
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// Returns a logger lexicon to be passed to loggerUpdate / loggerFlush.
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function loggerCreate {
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parameter filePath.
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parameter columns.
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parameter flushPeriod is 1.0.
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// Create or overwrite the file and write the header row
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local f to open(filePath).
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f:clear().
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f:writeln(_loggerFormatRow(columns)).
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local logger to lexicon(
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"file", f,
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"columns", columns,
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"buffer", list(),
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"flushPeriod", flushPeriod,
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"lastFlush", time:seconds
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).
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return logger.
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}
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// ── Appends a data row to the buffer.
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// Values must be in the same order as the columns list passed to loggerCreate.
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// Flushes the buffer to disk if the flush period has elapsed.
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function loggerUpdate {
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parameter logger.
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parameter values.
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logger["buffer"]:add(_loggerFormatRow(values)).
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if time:seconds - logger["lastFlush"] >= logger["flushPeriod"] {
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loggerFlush(logger).
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}
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}
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// ── Flushes all buffered rows to disk immediately.
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// Call at the end of a script to ensure no data is lost.
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function loggerFlush {
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parameter logger.
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local f to logger["file"].
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local buf to logger["buffer"].
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local i to 0.
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until i >= buf:length {
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f:writeln(buf[i]).
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set i to i + 1.
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}
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buf:clear().
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set logger["lastFlush"] to time:seconds.
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}
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// ── Formats a list of values as a CSV row string.
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function _loggerFormatRow {
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parameter values.
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local row to "".
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local i to 0.
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until i >= values:length {
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if i > 0 { set row to row + ",". }
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set row to row + values[i].
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set i to i + 1.
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}
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return row.
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} |