Literal Replacement Range Map
Map nonoverlapping literal replacements between original and resulting UTF-16 ranges, without repeatedly replacing inserted text.
Description
Map nonoverlapping literal replacements between original and resulting UTF-16 ranges, without repeatedly replacing inserted text.
Replacement range maps connect original literal matches to their positions after replacement. They are useful for annotations that must move with a predictable textual change.
When to use this tool
Map nonoverlapping literal replacements between original and resulting UTF-16 ranges, without repeatedly replacing inserted text.
- Prepare the supplied text, needle, replacement fields for this operation.
- Compare the complete example with the representation used by your own input before carrying the result into another step.
How to use the tool and how it works
- Enter text, needle, replacement. Use the exact text syntax, units and index conventions explained below.
- Run the tool. If input validation fails, correct the supplied fields before interpreting any result.
- Read result.ranges. Interpret false, null and empty lists using the distinctions below; they can be valid outputs.
Find nonoverlapping needle occurrences in the original text. Track cumulative replacement-length delta and return source and target start/end for each match using the literal replacement's UTF-16 length.1
| Input field | Meaning and representation | Accepted input |
|---|---|---|
| text | text. | Text; at most 8,192 UTF-16 code units, subject to the grammar above |
| needle | needle. | Text; at most 8,192 UTF-16 code units, subject to the grammar above |
| replacement | replacement. | Text; at most 8,192 UTF-16 code units, subject to the grammar above |
| Output field | Interpretation |
|---|---|
| result | Object containing the named outputs below. |
| result.ranges | The ranges list in the ordering and representation described above. |
{
"input": {
"text": "aba",
"needle": "a",
"replacement": "xy"
},
"output": {
"result": {
"ranges": [
{
"sourceStart": 0,
"sourceEnd": 1,
"targetStart": 0,
"targetEnd": 2
},
{
"sourceStart": 2,
"sourceEnd": 3,
"targetStart": 3,
"targetEnd": 5
}
]
}
}
}Limitations and assumptions
- The tool returns ranges rather than the replaced text. Empty needles are rejected, matches are case-sensitive, and overlapping occurrences are skipped after each selected match.
- Text offsets and lengths use UTF-16 code units unless explicitly described as bytes or code points. CRLF, CR and LF are recognized as line endings; a terminal newline creates a final empty line in the shared line model.
- Every declared top-level field is required and unexpected fields are rejected. Numeric inputs must be finite; ordinary text fields are bounded to 8,192 UTF-16 code units, with tighter operation-specific limits where stated.
- Ordinary string lists have at most 128 entries of at most 128 code units each; numeric lists and matrices have separate bounded size checks. Nonfinite results and excessively large serialized outputs are rejected.
- Indexes are zero-based and spans have an exclusive end unless explicitly stated otherwise. A valid false, null or empty-list result is distinct from malformed input.
Alternative or Complementary methods
Use a parser or language-aware editor when quoting, syntax or nested constructs matter. For plain text transforms, keep UTF-16 offsets, Unicode code points, grapheme clusters and UTF-8 byte offsets distinct; apply changes to the same source version used to calculate spans.
References
Similar or alternative tools
- Enclosing Literal Wrapper Stripper
Strip one complete nonoverlapping enclosing literal wrapper, never internal or partial matches.
- Line Range Extractor
Extract inclusive one-based hard-line ranges with original separators included for selected lines.