From 67aa71d23c0f6b88e771503ad20ed910421f1e8a Mon Sep 17 00:00:00 2001
From: Nikita Kalyazin <nkalyazin@gmail.com>
Date: Wed, 23 Apr 2014 00:21:40 +0400
Subject: [PATCH] add initial version of wrapper

---
 src/cscope.coffee | 105 ++++++++++++++++++++++++++++++++++++++++++++++
 1 file changed, 105 insertions(+)
 create mode 100644 src/cscope.coffee

diff --git a/src/cscope.coffee b/src/cscope.coffee
new file mode 100644
index 0000000..c1885c5
--- /dev/null
+++ b/src/cscope.coffee
@@ -0,0 +1,105 @@
+# TODO: rename methods in a consistent way
+# TODO: Gruntfile.coffee (refer to github.com/atom/node-ctags)
+# TODO: add tests
+# TODO: move all this to github issues
+
+nexpect = require 'nexpect'
+
+findSymbolCmd = "1"
+funcsCalledByCmd = "2"
+funcsCallingCmd = "3"
+findTextStringCmd = "4" # FIXME: only same dir
+# changeTextStringCmd = "5" # TODO: do i need this at all?
+findEgrepPatternCmd = "6"
+findFileCmd = "7"
+findFilesIncludingCmd = "8"
+findAssignCmd = "9"
+
+symbolToSearch = process.argv[2]
+dbPath = process.argv[3]
+if !symbolToSearch || !dbPath
+    console.log "Usage: coffee cscope.coffee <symbol> <db>"
+    process.exit 1
+
+genericFind = (cmd, symbol, db, callback) ->
+    cscopeRegex = /cscope: (\d+) lines/
+    outputRegex = /([\w.\/]+)\s+([a-zA-Z_$][\w$]+|<unknown>)\s+(\d+)\s+(.+)/
+    prompt = ">> "
+    quitCmd = "q"
+
+    nexpect.spawn "cscope"
+        , ["-d", "-k", "-l", "-f" + db]
+        .expect prompt
+        .sendline cmd + symbolToSearch
+        .expect cscopeRegex
+        .sendline quitCmd
+        .run (err, stdout, exitcode) ->
+            if err
+                console.log "could not invoke cscope (#{err})"
+                process.exit 1
+            header = stdout[1].match(cscopeRegex)
+            lines = parseInt(header[1])
+            if lines == 0 # no such symbol
+                return null
+
+            startIdx = 2
+            res = []
+            drop_next = null
+            # for line in [startIdx..startIdx + lines - 1]
+            padding = 3 # 2 x ">>" and lines count
+            # FIXME: ugly hack
+            for line in [startIdx..startIdx + (stdout.length - padding) - 1]
+                if drop_next
+                    drop_next = null
+                    continue
+                m = stdout[line].match(outputRegex)
+                if !m # broken line
+                    m = (stdout[line] + stdout[line + 1]).match(outputRegex)
+                    drop_next = 1
+                res.push
+                    file: m[1]
+                    sym:  m[2]
+                    line: m[3]
+                    ctx:  m[4]
+            callback res
+
+findSymbol = (symbol, db, callback) ->
+    genericFind findSymbolCmd, symbol, db, callback
+
+funcsCalledBy = (symbol, db, callback) ->
+    genericFind funcsCalledByCmd, symbol, db, callback
+
+funcsCalling = (symbol, db, callback) ->
+    genericFind funcsCallingCmd, symbol, db, callback
+
+findTextString = (symbol, db, callback) ->
+    genericFind findTextStringCmd, symbol, db, callback
+
+# changeTextString = (symbol, db, callback) ->
+    # genericFind changeTextStringCmd, symbol, db, callback
+
+findEgrepPattern = (symbol, db, callback) ->
+    genericFind findEgrepPatternCmd, symbol, db, callback
+
+findFile = (symbol, db, callback) ->
+    genericFind findFileCmd, symbol, db, callback
+
+findFilesIncluding = (symbol, db, callback) ->
+    genericFind findFilesIncludingCmd, symbol, db, callback
+
+findAssign = (symbol, db, callback) ->
+    genericFind findAssignCmd, symbol, db, callback
+
+printResult = (results) ->
+    for r in results
+        console.log "file: #{r.file}, sym: #{r.sym}, line: #{r.line}"
+
+# findSymbol symbolToSearch, dbPath, printResult
+# funcsCalledBy symbolToSearch, dbPath, printResult
+# funcsCalling symbolToSearch, dbPath, printResult
+# findTextString symbolToSearch, dbPath, printResult
+# changeTextString symbolToSearch, dbPath, printResult
+findEgrepPattern symbolToSearch, dbPath, printResult
+# findFile symbolToSearch, dbPath, printResult
+# findFilesIncluding symbolToSearch, dbPath, printResult
+# findAssign symbolToSearch, dbPath, printResult