aboutsummaryrefslogtreecommitdiffstats
path: root/waflib/Tools/fc_scan.py
diff options
context:
space:
mode:
Diffstat (limited to 'waflib/Tools/fc_scan.py')
-rw-r--r--waflib/Tools/fc_scan.py114
1 files changed, 114 insertions, 0 deletions
diff --git a/waflib/Tools/fc_scan.py b/waflib/Tools/fc_scan.py
new file mode 100644
index 00000000..12cb0fc0
--- /dev/null
+++ b/waflib/Tools/fc_scan.py
@@ -0,0 +1,114 @@
+#! /usr/bin/env python
+# encoding: utf-8
+# DC 2008
+# Thomas Nagy 2016-2018 (ita)
+
+import re
+
+INC_REGEX = """(?:^|['">]\s*;)\s*(?:|#\s*)INCLUDE\s+(?:\w+_)?[<"'](.+?)(?=["'>])"""
+USE_REGEX = """(?:^|;)\s*USE(?:\s+|(?:(?:\s*,\s*(?:NON_)?INTRINSIC)?\s*::))\s*(\w+)"""
+MOD_REGEX = """(?:^|;)\s*MODULE(?!\s*PROCEDURE)(?:\s+|(?:(?:\s*,\s*(?:NON_)?INTRINSIC)?\s*::))\s*(\w+)"""
+
+re_inc = re.compile(INC_REGEX, re.I)
+re_use = re.compile(USE_REGEX, re.I)
+re_mod = re.compile(MOD_REGEX, re.I)
+
+class fortran_parser(object):
+ """
+ This parser returns:
+
+ * the nodes corresponding to the module names to produce
+ * the nodes corresponding to the include files used
+ * the module names used by the fortran files
+ """
+ def __init__(self, incpaths):
+ self.seen = []
+ """Files already parsed"""
+
+ self.nodes = []
+ """List of :py:class:`waflib.Node.Node` representing the dependencies to return"""
+
+ self.names = []
+ """List of module names to return"""
+
+ self.incpaths = incpaths
+ """List of :py:class:`waflib.Node.Node` representing the include paths"""
+
+ def find_deps(self, node):
+ """
+ Parses a Fortran file to obtain the dependencies used/provided
+
+ :param node: fortran file to read
+ :type node: :py:class:`waflib.Node.Node`
+ :return: lists representing the includes, the modules used, and the modules created by a fortran file
+ :rtype: tuple of list of strings
+ """
+ txt = node.read()
+ incs = []
+ uses = []
+ mods = []
+ for line in txt.splitlines():
+ # line by line regexp search? optimize?
+ m = re_inc.search(line)
+ if m:
+ incs.append(m.group(1))
+ m = re_use.search(line)
+ if m:
+ uses.append(m.group(1))
+ m = re_mod.search(line)
+ if m:
+ mods.append(m.group(1))
+ return (incs, uses, mods)
+
+ def start(self, node):
+ """
+ Start parsing. Use the stack ``self.waiting`` to hold nodes to iterate on
+
+ :param node: fortran file
+ :type node: :py:class:`waflib.Node.Node`
+ """
+ self.waiting = [node]
+ while self.waiting:
+ nd = self.waiting.pop(0)
+ self.iter(nd)
+
+ def iter(self, node):
+ """
+ Processes a single file during dependency parsing. Extracts files used
+ modules used and modules provided.
+ """
+ incs, uses, mods = self.find_deps(node)
+ for x in incs:
+ if x in self.seen:
+ continue
+ self.seen.append(x)
+ self.tryfind_header(x)
+
+ for x in uses:
+ name = "USE@%s" % x
+ if not name in self.names:
+ self.names.append(name)
+
+ for x in mods:
+ name = "MOD@%s" % x
+ if not name in self.names:
+ self.names.append(name)
+
+ def tryfind_header(self, filename):
+ """
+ Adds an include file to the list of nodes to process
+
+ :param filename: file name
+ :type filename: string
+ """
+ found = None
+ for n in self.incpaths:
+ found = n.find_resource(filename)
+ if found:
+ self.nodes.append(found)
+ self.waiting.append(found)
+ break
+ if not found:
+ if not filename in self.names:
+ self.names.append(filename)
+