1 files changed, 132 insertions, 0 deletions
diff --git a/tex/context/base/mkiv/util-deb.lua b/tex/context/base/mkiv/util-deb.lua
new file mode 100644
index 000000000..ee732b3b5
--- /dev/null
+++ b/tex/context/base/mkiv/util-deb.lua
@@ -0,0 +1,132 @@
+if not modules then modules = { } end modules ['util-deb'] = {
+    version   = 1.001,
+    comment   = "companion to luat-lib.mkiv",
+    author    = "Hans Hagen, PRAGMA-ADE, Hasselt NL",
+    copyright = "PRAGMA ADE / ConTeXt Development Team",
+    license   = "see context related readme files"
+}
+
+-- the <anonymous> tag is kind of generic and used for functions that are not
+-- bound to a variable, like node.new, node.copy etc (contrary to for instance
+-- node.has_attribute which is bound to a has_attribute local variable in mkiv)
+
+local debug = require "debug"
+
+local getinfo = debug.getinfo
+local type, next, tostring = type, next, tostring
+local format, find = string.format, string.find
+local is_boolean = string.is_boolean
+
+utilities          = utilities or { }
+local debugger     = utilities.debugger or { }
+utilities.debugger = debugger
+
+local counters     = { }
+local names        = { }
+
+local report       = logs.reporter("debugger")
+
+-- one
+
+local function hook()
+    local f = getinfo(2) -- "nS"
+    if f then
+        local n = "unknown"
+        if f.what == "C" then
+            n = f.name or '<anonymous>'
+            if not names[n] then
+                names[n] = format("%42s",n)
+            end
+        else
+            -- source short_src linedefined what name namewhat nups func
+            n = f.name or f.namewhat or f.what
+            if not n or n == "" then
+                n = "?"
+            end
+            if not names[n] then
+                names[n] = format("%42s : % 5i : %s",n,f.linedefined or 0,f.short_src or "unknown source")
+            end
+        end
+        counters[n] = (counters[n] or 0) + 1
+    end
+end
+
+function debugger.showstats(printer,threshold) -- hm, something has changed, rubish now
+    printer   = printer or report
+    threshold = threshold or 0
+    local total, grandtotal, functions = 0, 0, 0
+    local dataset = { }
+    for name, count in next, counters do
+        dataset[#dataset+1] = { name, count }
+    end
+    table.sort(dataset,function(a,b) return a[2] == b[2] and b[1] > a[1] or a[2] > b[2] end)
+    for i=1,#dataset do
+        local d = dataset[i]
+        local name  = d[1]
+        local count = d[2]
+        if count > threshold and not find(name,"for generator") then -- move up
+            printer(format("%8i  %s\n", count, names[name]))
+            total = total + count
+        end
+        grandtotal = grandtotal + count
+        functions = functions + 1
+    end
+    printer("\n")
+    printer(format("functions  : % 10i\n", functions))
+    printer(format("total      : % 10i\n", total))
+    printer(format("grand total: % 10i\n", grandtotal))
+    printer(format("threshold  : % 10i\n", threshold))
+end
+
+function debugger.savestats(filename,threshold)
+    local f = io.open(filename,'w')
+    if f then
+        debugger.showstats(function(str) f:write(str) end,threshold)
+        f:close()
+    end
+end
+
+function debugger.enable()
+    debug.sethook(hook,"c")
+end
+
+function debugger.disable()
+    debug.sethook()
+ -- counters[debug.getinfo(2,"f").func] = nil
+end
+
+-- debugger.enable()
+--
+-- print(math.sin(1*.5))
+-- print(math.sin(1*.5))
+-- print(math.sin(1*.5))
+-- print(math.sin(1*.5))
+-- print(math.sin(1*.5))
+--
+-- debugger.disable()
+--
+-- print("")
+-- debugger.showstats()
+-- print("")
+-- debugger.showstats(print,3)
+--
+-- from the lua book:
+
+local function showtraceback(rep) -- from lua site / adapted
+    local level = 2 -- we don't want this function to be reported
+    local reporter = rep or report
+    while true do
+        local info = getinfo(level, "Sl")
+        if not info then
+            break
+        elseif info.what == "C" then
+            reporter("%2i : %s",level-1,"C function")
+        else
+            reporter("%2i : %s : %s",level-1,info.short_src,info.currentline)
+        end
+        level = level + 1
+    end
+end
+
+debugger.showtraceback = showtraceback
+-- debug.showtraceback = showtraceback