NB-076
70 lines
2.3 KiB
Markdown
70 lines
2.3 KiB
Markdown
# 21-csv-fb-lf: CSV to Fixed-Block Conversion (with Line Feed)
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## 电信业务场景
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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。
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## Description
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Reads a LINE SEQUENTIAL CSV file where Field3 may contain pipe ('|')
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markers that indicate record-splitting points. Uses INSPECT TALLYING
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to count markers and INSPECT REPLACING to transform them, then writes
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one output record per segment. One CSV input line can produce multiple
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output records ("line feed expansion").
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## Record Layout
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### Input (LINE SEQUENTIAL CSV)
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| Field | Description |
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|--------|--------------------------------------|
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| FIELD1 | Key code |
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| FIELD2 | Group identifier |
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| FIELD3 | Data values (may contain '|' markers) |
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Field3 with '|' markers:
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```
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ITEM1|ITEM2|ITEM3 -> produces 3 output records
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```
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### Output (fixed-length: 100 bytes)
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Format: `FIELD1|FIELD2|SEGMENT` padded to 100 bytes.
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## Files
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| File | Purpose |
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|------------------------|--------------------------------|
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| main-21-csv-fb-lf.cbl | Main COBOL program |
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| data-gen.sh | Generate CSV test data |
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| run.sh | Compile, run, verify |
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| README.md | This file |
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## Tests
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| Test Case | Description |
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|-------------------------|-------------------------------------|
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| No pipe markers | 1:1 mapping, no expansion |
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| Single pipe | 1 input line -> 2 output records |
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| Double pipe | 1 input line -> 3 output records |
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| Empty field3 | Empty field handling |
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| Leading pipe | Leading empty segment |
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| Trailing pipe | Trailing empty segment |
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| Multiple segments | Many markers in one field |
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| Quoted pipe | Pipe within quotes (literal) |
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## Usage
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```bash
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cd 21-csv-fb-lf
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bash data-gen.sh
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bash run.sh
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```
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## Expected Behavior
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- Each '|' separator produces an additional output record.
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- INSPECT TALLYING counts the markers.
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- INSPECT REPLACING transforms markers for processing.
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- Output records are fixed-length (100 bytes).
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