From 21491514b3642a321ce65f2a07428f63c4d9feb5 Mon Sep 17 00:00:00 2001
From: Benji Dial <Benji3.141@gmail.com>
Date: Sun, 8 Nov 2020 11:11:49 -0500
Subject: manual viewer, "swap colors" system call

---
 tools/man-gen.py | 135 +++++++++++++++++++++++++++++++++++++++++++++++++++++++
 1 file changed, 135 insertions(+)
 create mode 100644 tools/man-gen.py

(limited to 'tools/man-gen.py')

diff --git a/tools/man-gen.py b/tools/man-gen.py
new file mode 100644
index 0000000..30ade8a
--- /dev/null
+++ b/tools/man-gen.py
@@ -0,0 +1,135 @@
+from sys import argv
+
+infn, outfn = argv[1:]
+
+inf = open(infn, 'r')
+
+title = infn[infn.rfind('/')+1:infn.rfind('.')]
+lines = []
+links = []
+
+coutl = bytes(0)
+cllen = 0
+cword = ''
+ccol  = 0x0f
+
+def word_end():
+  global cword, cllen, coutl
+
+  if cword == '':
+    return
+
+  if cllen + len(cword) > 80:
+    line_end()
+
+  cllen += len(cword)
+  coutl += bytes(cword, 'ascii')
+  cword = ''
+
+  if cllen == 80:
+    line_end()
+
+def line_end():
+  global lines, cllen, coutl, ccol
+
+  if len(lines) == 0 and cllen == 0:
+    return
+  coutl += bytes([0x20] * (80 - cllen))
+
+  lines.append(coutl)
+  coutl = bytes(0)
+  cllen = 0
+  if ccol != 0x0f:
+    coutl += bytes([ccol | 0x80])
+
+while True:
+  ch = inf.read(1)
+  if ch == '':
+    word_end()
+    line_end()
+    break
+
+  elif ch == '\\':
+    word_end()
+
+    cmd = ''
+    while ch != '{':
+      cmd += ch
+      ch = inf.read(1)
+    cmd = cmd[1:]
+
+    content = ''
+    while ch != '}':
+      content += ch
+      ch = inf.read(1)
+    content = content[1:]
+
+    if cmd == 'title':
+      title = content
+    elif cmd == 'link':
+      lto = content
+      cpos = content.rfind(':')
+      if cpos != -1:
+        lto = content[cpos+1:]
+        content = content[:cpos]
+      links.append((len(lines), cllen, len(content), lto))
+      coutl += bytes([0x89])
+      cword = content
+      word_end()
+      coutl += bytes([0x8f])
+    elif cmd == 'color':
+      ncol = int(content, base=16)
+      if ccol != ncol:
+        ccol = ncol
+        coutl += bytes([ccol | 0x80])
+
+  elif ch == ' ':
+    word_end()
+    if cllen != 0:
+      coutl += bytes([0x20])
+      cllen += 1
+
+  elif ch == '\n':
+    word_end()
+    line_end()
+
+  else:
+    cword += ch
+
+inf.close()
+
+def dword(n):
+  return bytes([n % 256, (n // 256) % 256, (n // 65536) % 256, n // 16777216])
+
+outf = open(outfn, 'wb')
+
+outf.write(dword(len(title)))
+outf.write(bytes(title, 'ascii'))
+outf.write(bytes([0]))
+
+outf.write(dword(len(links)))
+
+ltable = bytes(0)
+for link in links:
+  line, scol, tlen, fpto = link
+
+  ltable += dword(line)
+  ltable += bytes([scol, tlen])
+  ltable += dword(len(fpto))
+  ltable += bytes(fpto, 'ascii')
+  ltable += bytes([0])
+
+outf.write(dword(len(ltable)))
+outf.write(ltable)
+
+outf.write(dword(len(lines)))
+
+off = 4 + len(title) + 1 + 4 + 4 + len(ltable) + 4 + len(lines) * 4
+for line in lines:
+  outf.write(dword(off))
+  off += len(line)
+
+for line in lines:
+  outf.write(line)
+
+outf.close()
\ No newline at end of file
-- 
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