add read file support to C, solve 22

README.rst

@@ -46,7 +46,7 @@ Olivia's Project Euler Solutions
 +------------+--------------------------+--------+-------------------+
 | Language   | Version                  | Solved | Status            |
 +============+==========================+========+===================+
-| C          | C99+ in: |clang|, |br|   | 20     | |Ci| |br|         |
+| C          | C99+ in: |clang|, |br|   | 21     | |Ci| |br|         |
 |            | |gcc|, |pcc|, |tcc| |br| |        | |C-Cov| |br|      |
 |            | C11+ in: |msvc| [1]_     |        | |CodeQL|          |
 +------------+--------------------------+--------+-------------------+

c/README.rst

@@ -179,6 +179,7 @@ Problems Solved
 -  ☒ `14 <./src/p0014.c>`__
 -  ☒ `15 <./src/p0015.c>`__
 -  ☒ `16 <./src/p0016.c>`__
+-  ☒ `22 <./src/p0022.c>`__
 -  ☒ `34 <./src/p0034.c>`__
 -  ☒ `76 <./src/p0076.c>`__
 -  ☒ `836 <./src/p0836.c>`__

c/test.c

@@ -17,6 +17,7 @@
 #include "src/p0015.c"
 #include "src/p0016.c"
 #include "src/p0017.c"
+#include "src/p0022.c"
 #include "src/p0034.c"
 #include "src/p0076.c"
 #include "src/p0836.c"
@@ -44,6 +45,7 @@ const Answer answers[] = {
 	{15,	137846528820,	p0015},
 	{16,	1366,			p0016},
 	{17,	21124,			p0017},
+	{22,	871198282,			p0022},
 	{34,	40730,			p0034},
 	{76,	190569291,		(unsigned long long (*)()) p0076},
 };

c/test_euler.py

@@ -37,6 +37,7 @@
     15: 137846528820,
     16: 1366,
     17: 21124,
+    22: 871198282,
     34: 40730,
     76: 190569291,
     836: b"aprilfoolsjoke",

docs/c/p0022.rst

@@ -0,0 +1,29 @@
+C Implementation of Problem 22
+==============================
+
+View source code :source:`c/src/p0022.c`
+
+Includes
+--------
+
+- `utils.h <./utils.html>`__
+
+Solution
+--------
+
+.. c:function:: int cmpstr(const void *a, const void *b)
+
+  A wrapper around ``strcmp()`` to adapt it for ``qsort()``
+
+.. c:function:: unsigned long long p0022()
+
+.. c:function:: int main(int argc, char const *argv[])
+
+   .. note:: 
+      
+      This function is only present in the Python test runner, or when compiling as a standalone program.
+      It is not present when compiling for the Unity test runner.
+
+.. literalinclude:: ../../c/src/p0022.c
+   :language: C
+   :linenos:

docs/c/utils.rst

@@ -0,0 +1,18 @@
+utils.h
+=======
+
+View source code :source:`c/src/include/utils.h`
+
+.. c:namespace-push:: utils
+    
+.. c:function:: char *get_data_file(const char *name)
+
+    Return a character array containing thr whole contents of a file found in _data.
+
+.. c:function:: char *get_parent_directory(const char *name, const unsigned int levels)
+
+.. c:namespace-pop::
+
+.. literalinclude:: ../../c/src/include/utils.h
+   :language: C
+   :linenos:

docs/index.rst

@@ -169,7 +169,7 @@ Problems Solved
 +-----------+------------+------------+------------+------------+------------+------------+
 |:prob:`21` |            |            |            |            |:py-d:`0021`|            |
 +-----------+------------+------------+------------+------------+------------+------------+
-|:prob:`22` |            |            |            |            |:py-d:`0022`|:rs-d:`0022`|
+|:prob:`22` |:c-d:`0022` |            |            |            |:py-d:`0022`|:rs-d:`0022`|
 +-----------+------------+------------+------------+------------+------------+------------+
 |:prob:`23` |            |            |            |            |:py-d:`0023`|            |
 +-----------+------------+------------+------------+------------+------------+------------+