Finished implementing the funge space field

examples/dna.b98

@@ -0,0 +1,8 @@
+7^DN>vA
+v_#v? v
+7^<""""
+3  ACGT  
+90!""""
+4*:>>>v
++8^-1,<
+> ,+,@)  

examples/factorial.b98

@@ -0,0 +1,2 @@
+&>:1-:v v *_$.@  
+ ^    _$>\:^ 

examples/hello.b98

@@ -0,0 +1 @@
+64+"!dlroW ,olleH">:#,_@

examples/hello2.b98

@@ -0,0 +1,2 @@
+                                 v
+ @ > #;>:#,_e-j; "Hello world!"da<

examples/invalid.b98

@@ -0,0 +1,2 @@
+
+@

examples/minimal.b98

@@ -0,0 +1 @@
+@

examples/rn.b98

@@ -0,0 +1 @@
+64+"!dlroW ,olleH">:#,_@

src/field.nim

@@ -8,7 +8,7 @@ type
     lx, ly: int
     lines: seq[Line]
 
-proc blank*(f: var Field, x, y: int) =
+func blank*(f: var Field, x, y: int) =
   if y < f.y or y >= f.y+f.ly: # outside the field
     return
   var l = addr f.lines[y-f.y]
@@ -59,17 +59,80 @@ proc blank*(f: var Field, x, y: int) =
       x2 = f.lines[i].x + f.lines[i].l
   f.lx = x2-f.x
 
-proc get*(f: Field, x, y: int): int =
+func get*(f: Field, x, y: int): int =
   if y >= f.y and y < f.y+f.ly:
     let l = f.lines[y-f.y]
     if x >= l.x and x < l.x+l.l:
       return l.columns[x-l.x]
   return int(' ')
 
-proc isIn*(f: Field, x, y: int): bool =
+func isIn*(f: Field, x, y: int): bool =
   return x >= f.x and y >= f.y and x < f.x+f.lx and y < f.y+f.ly
 
-proc set*(f: var Field, x, y, v: int) =
+proc load*(f: var Field, filename: string): bool =
+  var file: File
+  if not open(file, filename):
+    return false
+  defer: file.close()
+  f.lines.add(Line())
+  var l = addr f.lines[0]
+  var trailingSpaces = 0
+  var data: array[255,char]
+  while true:
+    let n = file.readChars(data, 0, 255)
+    if n <= 0:
+      if f.ly == 0:
+        if l.l == 0: # we got en empty file!
+          return false
+        f.x = l.x
+      if l.l > 0:
+        inc f.ly
+        if f.lx < l.l+l.x-f.x:
+          f.lx = l.l+l.x-f.x
+      break
+    var i = 0
+    while i < n:
+      if data[i] == char(12):
+        inc i
+        continue
+      if data[i] == '\n' or data[i] == '\r':
+        if f.ly == 0:
+          if l.l == 0:
+            return false
+          f.x = l.x
+        inc f.ly
+        if f.x > l.x:
+          f.x = l.x
+        if f.lx < l.l+l.x-f.x:
+          f.lx = l.l+l.x-f.x
+        f.lines.add(Line())
+        l = addr f.lines[^1]
+        trailingSpaces = 0
+        if i+1 < n and data[i] == '\r' and data[i+1] == '\n':
+          inc i
+      else:
+        if data[i] == ' ':
+          if l.l == 0: # trim leading spaces
+            inc l.x
+          else:
+            inc trailingSpaces
+        else:
+          if trailingSpaces > 0:
+            let newL = l.l + trailingSpaces + 1
+            l.columns.setlen(newL)
+            for j in l.l..<newL-1:
+              l.columns[j] = int(' ')
+            l.columns[newL-1] = int(data[i])
+            l.l = newL
+            trailingSpaces = 0
+          else:
+            l.columns.add(int(data[i]))
+            inc l.l
+      inc i
+  f.lines = f.lines[0..<f.ly]
+  return true
+
+func set*(f: var Field, x, y, v: int) =
   if v == int(' '):
     f.blank(x, y)
   elif y >= f.y:

src/nimfunge98.nim

@@ -1,5 +0,0 @@
-import nimfunge98/field/field
-
-let f:Field
-
-echo f.get(3,2)

tests/testField.nim

@@ -2,8 +2,12 @@ import unittest
 
 include field
 
-proc `==`(a, b: Line): bool = a.x == b.x and a.l == b.l and a.columns == b.columns
+func `==`(a, b: Line): bool = a.x == b.x and a.l == b.l and a.columns == b.columns
-proc `==`(a, b: Field): bool = a.x == b.x and a.lx == b.lx and a.y == b.y and a.ly == b.ly and a.lines == b.lines
+func `==`(a, b: Field): bool = a.x == b.x and a.lx == b.lx and a.y == b.y and a.ly == b.ly and a.lines == b.lines
+func cols(a: openarray[char]): seq[int] =
+  result.setlen(a.len)
+  for i in 0..<a.len:
+    result[i] = a[i].int()
 
 const minimal = Field(x: 0, y: 0, lx: 1, ly: 1, lines: @[Line(x: 0, l: 1, columns: @[int('@')])])
 
@@ -99,8 +103,48 @@ suite "Field":
   test "Field.isIn":
     check minimal.isIn(0, 0) == true
     check minimal.isIn(1, 0) == false
+  test "Field.load":
+    var nonexistant: Field
+    check nonexistant.load("nonexistant") == false
+    var invalid: Field
+    check invalid.load("examples/invalid.b98") == false
+    var empty: Field
+    check empty.load("examples/empty.b98") == false
+    var min: Field
+    check min.load("examples/minimal.b98") == true
+    check min == minimal
+    var hello1A: Field; var hello1B = Field(lx: 24, ly: 1, lines: @[Line(l:24, columns: @['6', '4', '+', '"', '!', 'd', 'l', 'r', 'o', 'W', ' ', ',', 'o', 'l', 'l', 'e', 'H', '"', '>', ':', '#', ',', '_', '@'].cols)])
+    check hello1A.load("examples/hello.b98") == true
+    check hello1A == hello1B
+    var rn: Field
+    check rn.load("examples/rn.b98") == true
+    check rn == hello1B
+    var hello2A: Field; var hello2B = Field(x: 1, lx: 33, ly: 2,lines: @[
+      Line(x:33, l:1, columns: @['v'].cols),
+      Line(x:1, l:33, columns: @['@', ' ', '>', ' ', '#', ';', '>', ':', '#', ',', '_', 'e', '-', 'j', ';', ' ', '"', 'H', 'e', 'l', 'l', 'o', ' ', 'w', 'o', 'r', 'l', 'd', '!', '"', 'd', 'a', '<'].cols)
+    ])
+    check hello2A.load("examples/hello2.b98") == true
+    check hello2A == hello2B
+    var factorial2A: Field; var factorial2B = Field(x: 0, lx: 15, ly: 2,lines: @[
+      Line(x:0, l:15, columns: @['&', '>', ':', '1', '-', ':', 'v', ' ', 'v', ' ', '*', '_', '$', '.', '@'].cols),
+      Line(x:1, l:11, columns: @['^', ' ', ' ', ' ', ' ', '_', '$', '>', '\\', ':', '^'].cols)
+    ])
+    check factorial2A.load("examples/factorial.b98") == true
+    check factorial2A == factorial2B
+    var dna2A: Field; var dna2B = Field(x: 0, lx: 7, ly: 8,lines: @[
+      Line(x:0, l:7, columns: @['7', '^', 'D', 'N', '>', 'v', 'A'].cols),
+      Line(x:0, l:7, columns: @['v', '_', '#', 'v', '?', ' ', 'v'].cols),
+      Line(x:0, l:7, columns: @['7', '^', '<', '"', '"', '"', '"'].cols),
+      Line(x:0, l:7, columns: @['3', ' ', ' ', 'A', 'C', 'G', 'T'].cols),
+      Line(x:0, l:7, columns: @['9', '0', '!', '"', '"', '"', '"'].cols),
+      Line(x:0, l:7, columns: @['4', '*', ':', '>', '>', '>', 'v'].cols),
+      Line(x:0, l:7, columns: @['+', '8', '^', '-', '1', ',', '<'].cols),
+      Line(x:0, l:7, columns: @['>', ' ', ',', '+', ',', '@', ')'].cols),
+    ])
+    check dna2A.load("examples/dna.b98") == true
+    check dna2A == dna2B
   test "Field.set":
-    var f = Field(x: 0, y: 0, lx: 1, ly: 1, lines: @[Line(x: 0, l: 1, columns: @[int('>')])])
+    var f = Field(x: 0, y: 0, lx: 1, ly: 1, lines: @[Line(x: 0, l: 1, columns: @['>'].cols)])
     f.set(0,0,int('@'))
     check f == minimal
     f.set(1,0,int(' '))