Function: parseAstmRecords()

parseAstmRecords(raw, options?): AstmMessage

Parse an ASTM/CLSI-LIS02 record stream into an immutable AstmMessage.

The stream is a sequence of records separated by CR (with LF/CRLF tolerated); the first record must be an H header, which declares the delimiters. Lenient by default: set strict to reject any tolerated deviation.

Several messages in one stream. A message runs H … L, so a stream may carry more than one, and each H declares the delimiters for the records that follow it. A later header that declares a different set is honored from that header onward and flagged ASTM_RECORD_DELIMITERS_REDECLARED; records already read keep the set they were read with, so a redeclaration never reinterprets earlier bytes. A header that merely restates the set in force is a no-op and warns nothing. A later header that cannot declare a usable set keeps the delimiters already in force and warns ASTM_RECORD_UNREADABLE_REDECLARATION: a set is never guessed, and no record is dropped. Per-header sets are on each HeaderRecord.delimiters; AstmMessage.delimiters is the first header's.

Parameters

raw

string | Uint8Array<ArrayBufferLike>

The de-framed record bytes, as a string or Uint8Array (decoded latin1 so byte values survive 1:1).

options?

AstmParseOptions = {}

Parse options; lenient unless strict is set.

Returns

AstmMessage

The parsed, deeply-frozen message.

Throws

AstmParseError on a Tier-3 fatal (EMPTY_INPUT, ASTM_RECORD_NO_HEADER, ASTM_RECORD_UNDECLARED_DELIMITERS).

Throws

AstmStrictError when strict is set and a deviation occurs.

Example

import { parseAstmRecords, results } from "@cosyte/astm";
const msg = parseAstmRecords("H|\\^&\rP|1\rO|1|ACC\rR|1|^^^687|28.6|U/L||N||F\rL|1|N\r");
results(msg)[0]?.value; // "28.6"