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6 files changed, 98 insertions, 0 deletions

diff --git a/.gitignore b/.gitignore
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+tests/*.log
diff --git a/README.md b/README.md
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+# `par` text editor
diff --git a/par/piece-table.scm b/par/piece-table.scm
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+;; Pieces themselves: the buffer is a reference to the buffer they take their
+;; data from.
+;; Start and end are numbers.
+;; The type defines how they should be rendered, it makes
+;; possible to account for hyperlinks or stuff like that in the future with
+;; ease.
+(define-record-type <piece>
+  (make-piece buffer start length type)
+  piece?
+  (buffer piece-buffer set-piece-buffer!)
+  (start piece-start set-piece-start!)
+  (length piece-length set-piece-length!)
+  (type piece-type set-piece-type!))
+
+
+
+;; The piece table itself;
+;; original and add are strings and pieces is a list of pieces
+(define-record-type <piece-table>
+  (make-piece-table original add pieces)
+  piece-table?
+  (original piece-table-original set-piece-table-original!)
+  (add piece-table-add set-piece-table-add!)
+  (pieces piece-table-pieces set-piece-table-pieces!))
+
+(define (add-piece-table-piece! piece-table piece)
+  (cons piece (piece-table-pieces piece-table)))
+
+
+(define (piece-table-index piece-table pos)
+  #f)
+
+(define (piece-table-insert! piece-table pos char)
+  #f)
+
+(define (piece-table-delete! piece-table pos)
+  #f)
+
+
+
+;; Serialization - Deserialization
+(define (piece-table-write port)
+  "Write a piece table to port"
+  #f)
+(define (piece-table-read port)
+  "Read a piece table stored in port"
+  #f)
+
+
+
+;; From/to string
+(define (string->piece-table string)
+  (make-piece-table string ""
+    (list (make-piece string 0 (string-length string) 'normal))))
+
+(define (piece-table->string piece-table)
+  #f)
diff --git a/par/piece-table.sld b/par/piece-table.sld
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+++ b/par/piece-table.sld
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+(define-library (par piece-table)
+  (import (scheme base))
+  (export make-piece-table
+          piece-table-index
+          piece-table-insert!
+          piece-table-delete!
+          string->piece-table)
+  (include "piece-table.scm"))
diff --git a/tests/piece-table.scm b/tests/piece-table.scm
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+++ b/tests/piece-table.scm
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+(import (srfi 64)
+        (par piece-table))
+
+;; https://srfi.schemers.org/srfi-64/srfi-64.html
+
+
+(test-begin "index")
+  (define table (make-piece-table "HOLA" "" (list)))
+  (test-equal #\L (piece-table-index table 2))
+(test-end "index")
+
+(test-begin "insert")
+  (define table (make-piece-table "HOLA" "" (list)))
+  (piece-table-insert! table 2 #\9)
+  (test-equal #\9 (piece-table-index table 2))
+(test-end "insert")
+
+(test-begin "delete")
+(test-end "delete")
diff --git a/tests/run-tests.sh b/tests/run-tests.sh
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+++ b/tests/run-tests.sh
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+HERE=`dirname $0`
+TESTS=$@
+
+pushd "$HERE"
+if [ -z "$TESTS" ]; then
+    TESTS=*.scm
+fi
+
+for i in $TESTS; do
+    guile -L .. --r7rs "$i"
+done
+popd