Initial commit

.gitignore

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+# Ignore the binary
+snake_case

snake_case.nimble

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+# Package
+version       = "1.0.0"
+author        = "Gustavo Córdova Avila"
+description   = "Convert strings to/from SNAKE_CASE"
+license       = "Apache-2.0"
+srcDir        = "src"
+
+# Dependencies
+requires "nim >= 2.0.0"

src/snake_case.nim

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+## Convert strings to/from SNAKE_CASE
+
+proc toSnakeCase(str: string): string =
+  ## Convert a camelCase string to SNAKE_CASE
+  if str.len > 0:
+    var prv: char = '\0'
+    for ch in str:
+      if ch in {'A'..'Z'}:
+        if result.len > 0 and prv notin {'A'..'Z'}:
+          result.add '_'
+        result.add ch
+      elif ch in {'a'..'z'}:
+        result.add (ch.byte - 32).char
+      elif ch in {'0'..'9'}:
+        result.add ch
+      elif ch in {'-', '_', '.', '+'}:
+        if result.len > 0 and result[^1] != '_':
+          result.add '_'
+
+proc fromSnakeCase(str: string): string =
+  ## Convert from SNAKE_CASE to camelCase
+  var usc: bool = false
+  for ch in str:
+    if ch in {'A'..'Z'}:
+      if usc:
+        result.add ch
+        usc = false
+      else:
+        result.add (ch.byte + 32).char
+    elif ch in {'0'..'9', 'a'..'z'}:
+      result.add ch
+    elif ch in {'_', '-', '.', '+'}:
+      usc = true
+
+# Fin.

tests/config.nims

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+switch("path", "$projectDir/../src")

tests/test1_toSnakeCase.nim

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+# This is just an example to get you started. You may wish to put all of your
+# tests into a single file, or separate them into multiple `test1`, `test2`
+# etc. files (better names are recommended, just make sure the name starts with
+# the letter 't').
+#
+# To run these tests, simply execute `nimble test`.
+
+import unittest
+import snake_case
+
+test "toSnakeCase":
+  check "toSnakeCase".toSnakeCase() == "TO_SNAKE_CASE"
+  check "httpServerName".toSnakeCase() == "HTTP_SERVER_NAME"
+  check "portNum".toSnakeCase() == "PORT_NUM"
+  check "firstNameOnly".toSnakeCase() == "FIRST_NAME_ONLY"
+  check "rostr.token".toSnakeCase() == "ROSTR_TOKEN"
+

tests/test2_fromSnakeCase.nim

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+# This is just an example to get you started. You may wish to put all of your
+# tests into a single file, or separate them into multiple `test1`, `test2`
+# etc. files (better names are recommended, just make sure the name starts with
+# the letter 't').
+#
+# To run these tests, simply execute `nimble test`.
+
+import unittest
+import snake_case
+
+test "fromSnakeCase":
+  check "TO_SNAKE_CASE".fromSnakeCase() == "toSnakeCase"
+  check "HTTP_SERVER_NAME".fromSnakeCase() == "httpServerName"
+  check "PORT_NUM".fromSnakeCase() == "portNum"
+  check "FIRST_NAME_ONLY".fromSnakeCase() == "firstNameOnly"
+  check "ROSTR_TOKEN".fromSnakeCase() == "rostrToken"
+