feat: add benchmark-programs — 58 telecom COBOL test programs

作为子目录纳入系统，与核心测试管道协同 Co-Authored-By: Claude <noreply@anthropic.com>
2026-06-25 09:53:21 +08:00
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+# 21-csv-fb-lf: CSV to Fixed-Block Conversion (with Line Feed)
+
+## 电信业务场景
+
+外部CDR CSV取込(有LF)。读取含改行的CSV格式CDR文件，通过INSPECT REPLACING将改行展开为多条固定长记录。
+
+## Description
+
+Reads a LINE SEQUENTIAL CSV file where Field3 may contain pipe ('|')
+markers that indicate record-splitting points. Uses INSPECT TALLYING
+to count markers and INSPECT REPLACING to transform them, then writes
+one output record per segment. One CSV input line can produce multiple
+output records ("line feed expansion").
+
+## Record Layout
+
+### Input (LINE SEQUENTIAL CSV)
+
+| Field  | Description                          |
+|--------|--------------------------------------|
+| FIELD1 | Key code                                |
+| FIELD2 | Group identifier                        |
+| FIELD3 | Data values (may contain '|' markers) |
+
+Field3 with '|' markers:
+```
+ITEM1|ITEM2|ITEM3   -> produces 3 output records
+```
+
+### Output (fixed-length: 100 bytes)
+
+Format: `FIELD1|FIELD2|SEGMENT` padded to 100 bytes.
+
+## Files
+
+| File                   | Purpose                        |
+|------------------------|--------------------------------|
+| main-21-csv-fb-lf.cbl  | Main COBOL program             |
+| data-gen.sh            | Generate CSV test data         |
+| run.sh                 | Compile, run, verify           |
+| README.md              | This file                      |
+
+## Tests
+
+| Test Case               | Description                         |
+|-------------------------|-------------------------------------|
+| No pipe markers         | 1:1 mapping, no expansion           |
+| Single pipe             | 1 input line -> 2 output records    |
+| Double pipe             | 1 input line -> 3 output records    |
+| Empty field3            | Empty field handling                |
+| Leading pipe            | Leading empty segment               |
+| Trailing pipe           | Trailing empty segment              |
+| Multiple segments       | Many markers in one field           |
+| Quoted pipe             | Pipe within quotes (literal)        |
+
+## Usage
+
+```bash
+cd 21-csv-fb-lf
+bash data-gen.sh
+bash run.sh
+```
+
+## Expected Behavior
+
+- Each '|' separator produces an additional output record.
+- INSPECT TALLYING counts the markers.
+- INSPECT REPLACING transforms markers for processing.
+- Output records are fixed-length (100 bytes).