Added C99 Solution

c99/GildedRose.c

@@ -0,0 +1,90 @@
+#include <string.h>
+#include "GildedRose.h"
+
+Item*
+init_item(Item* item, const char *name, int sellIn, int quality)
+{
+    item->sellIn = sellIn;
+    item->quality = quality;
+    item->name = strdup(name);
+    
+    return item;
+}
+
+void update_quality(Item items[], int size) 
+{
+    int i;
+    
+    for (i = 0; i < size; i++)
+    {
+        if (strcmp(items[i].name, "Aged Brie") && strcmp(items[i].name, "Backstage passes to a TAFKAL80ETC concert"))
+        {
+            if (items[i].quality > 0)
+            {
+                if (strcmp(items[i].name, "Sulfuras, Hand of Ragnaros"))
+                {
+                    items[i].quality = items[i].quality - 1;
+                }
+            }
+        }
+        else
+        {
+            if (items[i].quality < 50)
+            {
+                items[i].quality = items[i].quality + 1;
+
+                if (!strcmp(items[i].name, "Backstage passes to a TAFKAL80ETC concert"))
+                {
+                    if (items[i].sellIn < 11)
+                    {
+                        if (items[i].quality < 50)
+                        {
+                            items[i].quality = items[i].quality + 1;
+                        }
+                    }
+
+                    if (items[i].sellIn < 6)
+                    {
+                        if (items[i].quality < 50)
+                        {
+                            items[i].quality = items[i].quality + 1;
+                        }
+                    }
+                }
+            }
+        }
+
+        if (strcmp(items[i].name, "Sulfuras, Hand of Ragnaros"))
+        {
+            items[i].sellIn = items[i].sellIn - 1;
+        }
+
+        if (items[i].sellIn < 0)
+        {
+            if (strcmp(items[i].name, "Aged Brie"))
+            {
+                if (strcmp(items[i].name, "Backstage passes to a TAFKAL80ETC concert"))
+                {
+                    if (items[i].quality > 0)
+                    {
+                        if (strcmp(items[i].name, "Sulfuras, Hand of Ragnaros"))
+                        {
+                            items[i].quality = items[i].quality - 1;
+                        }
+                    }
+                }
+                else
+                {
+                    items[i].quality = items[i].quality - items[i].quality;
+                }
+            }
+            else
+            {
+                if (items[i].quality < 50)
+                {
+                    items[i].quality = items[i].quality + 1;
+                }
+            }
+        }
+    }
+}

c99/GildedRose.h

@@ -0,0 +1,9 @@
+typedef struct
+{
+    char *name;
+    int sellIn;
+    int quality;
+} Item;
+
+extern Item* init_item(Item* item, const char *name, int sellIn, int quality);
+extern void update_quality(Item items[], int size);

c99/GildedRoseTextTests.c

@@ -0,0 +1,43 @@
+#include <stdio.h>
+#include "GildedRose.h"
+
+int
+print_item(Item *item)
+{
+    return printf("%s, %d, %d\n", item->name, item->sellIn, item->quality);
+}
+
+int main()
+{
+    Item items[9];
+    int last = 0;
+    int day;
+    int index;
+    
+    init_item(items + last++, "+5 Dexterity Vest", 10, 20);
+    init_item(items + last++, "Aged Brie", 2, 0);
+    init_item(items + last++, "Elixir of the Mongoose", 5, 7);
+    init_item(items + last++, "Sulfuras, Hand of Ragnaros", 0, 80);
+    init_item(items + last++, "Sulfuras, Hand of Ragnaros", -1, 80);
+    init_item(items + last++, "Backstage passes to a TAFKAL80ETC concert", 15, 20);
+    init_item(items + last++, "Backstage passes to a TAFKAL80ETC concert", 10, 49);
+    init_item(items + last++, "Backstage passes to a TAFKAL80ETC concert", 5, 49);
+    // this Conjured item doesn't yet work properly
+    init_item(items + last++, "Conjured Mana Cake", 3, 6);
+    
+    puts("OMGHAI!");
+
+    for (day = 0; day <= 30; day++)
+    {
+        printf("-------- day %d --------\n", day);
+        printf("name, sellIn, quality\n");
+        for(index = 0; index < last; index++) {
+            print_item(items + index);
+        }
+	
+        printf("\n");
+
+        update_quality(items, last);
+    }
+    return 0;
+}

c99/Makefile

@@ -0,0 +1,51 @@
+# Makefile for building the kata file with the Google Testing Framework
+#
+# SYNOPSIS:
+#
+#   make [all]  - makes everything, runs tests
+#   make TARGET - makes the given target.
+#   make clean  - removes all files generated by make.
+#   make memtest - run memory leak analysis
+
+# The _POSIX_C_SOURCE definition prevents the compiler from throwing warnings
+CFLAGS = `pkg-config --cflags check` -g --std=c99 -D_POSIX_C_SOURCE=200809L
+LIBS = `pkg-config --libs check`
+
+# All files that should be part of your test should start with 'test_'
+TEST_SRC = $(wildcard test_*.c)
+TEST_BASE = $(basename ${TEST_SRC})
+TEST_OBJECTS = $(addsuffix .o, ${TEST_BASE})
+
+# All files that should be part of your main program should start with 'gilded_'
+PROG_SRC = $(wildcard gilded_*.c)
+PROG_BASE = $(basename ${PROG_SRC})
+PROG_OBJECTS = $(addsuffix .o, ${PROG_BASE})
+
+OBJECT_UNDER_TEST = GildedRose.o ${PROG_OBJECTS}
+
+# This is the test application.  You can run this program to see your test output
+TEST_APP = test_gildedrose
+
+
+# This will generate output for several products over a course of several days.
+# You can run this application to build golden rule tests
+GOLDEN_APP = golden_rose
+
+all: ${TEST_APP} ${GOLDEN_APP}
+	./${TEST_APP}
+
+${TEST_APP}: ${TEST_OBJECTS} ${OBJECT_UNDER_TEST}
+	$(CC) $(CFLAGS) -o $@ $^ $(LIBS)
+
+${GOLDEN_APP}: GildedRoseTextTests.o ${OBJECT_UNDER_TEST}
+	$(CC) $(CFLAGS) -o $@ $^
+
+# If you're not on a mac, you should run memtest (in fact, consider adding it to the 'all' target).
+# If you're on a mac, complain to apple for breaking an important development tool.
+memtest: ${TEST_APP}
+	valgrind --leak-check=full --error-exitcode=1 ./${TEST_APP} --nofork
+
+clean:
+	rm -f *.o
+	rm -f ${TEST_APP}
+	rm -f ${GOLDEN_APP}

c99/README.md

@@ -0,0 +1,41 @@
+# Gilded Rose, C99 Edition
+
+The command "make" will build and run your tests, as well as build the program
+golden_rose, which can serve as the basis for a golden-rule test.
+
+
+## Assumptions
+  - gnu make and a C compiler (like gcc) is installed on your system and is in the PATH
+  - The check unit testing library is installed on your system (https://libcheck.github.io/check/)
+  - pkg-config is installed on your system
+
+## Usage
+  - Run `make` to build the program and run all tests
+  - Files which contain tests should be named `test_*.c`  They will automatically
+    be included in your test suite.
+  - `GildedRose.h` should not be modified.  The Goblin threat is real.
+  - New program logic may be included in files named `gilded_*.c` which will
+    automatically be included in both your tests and the final program.
+
+## Golden Rule tests
+  - The program `golden_rose` will generate text output.  If you capture this
+    output after your first `make` you can use this as a reference for a golden
+    rule test.
+  - You can test your work against this reference by directing the output of your
+    current golden_rose to a file and using the `diff` utility to compare that
+    to the reference file you created above.
+  - To avoid the Goblin threat you can use `git diff GildedRose.h`, which should
+    have no output if you have left the precious Item structure unchanged.
+
+## Notes
+  - This project is tweaked to run on Linux systems, and will mostly work on Macs.
+    With some changes to the Makefile it can be made to run on BSD systems with
+    BSD make.  An adventurous person could also get it to run on Windows.
+  - If you are working on a Macintosh computer you cannot run the memtest target,
+    because valgrind and OS X don't play nice any more.  If you want to use the
+    memory checker OS X does run docker as a first class citizen.
+  - If you don't have pkg-config on your system, the only changes you'll need to
+    make are for the requirements of the check library.  Mostly you need to
+    set the appropriate flags for threaded binaries, which may include some
+    special linker flags.  The libcheck documentation will cover what you need
+    if you want to undertake this change.

c99/test_main.c

@@ -0,0 +1,31 @@
+#include <stdio.h>
+#include <stdlib.h>
+#include <check.h>
+
+Suite *suite_rose(void);
+
+int main(int argc, char **argv)
+{
+  Suite *s;
+  SRunner *runner;
+  int number_fails;
+  int forkme = 1;
+
+  if (argc > 1 && strcmp(argv[1], "--nofork") == 0) {
+    forkme = 0;
+  }
+
+  s = suite_rose();
+  runner = srunner_create(s);
+
+  if (0 == forkme) {
+    srunner_set_fork_status(runner, CK_NOFORK);
+  }
+
+  srunner_run_all(runner, CK_NORMAL);
+  number_fails = srunner_ntests_failed(runner);
+
+  srunner_free(runner);
+
+  return number_fails;
+}

c99/test_rose.c

@@ -0,0 +1,34 @@
+#include <check.h>
+#include "GildedRose.h"
+
+
+
+START_TEST(roseFoo)
+{
+  Item items[1];
+  init_item(items, "foo", 0, 0);
+  update_quality(items, 1);
+
+  ck_assert_str_eq("fixme", items[0].name);
+}
+END_TEST
+
+TCase *tcase_rose(void)
+{
+  TCase *tc;
+
+  tc = tcase_create("gilded-rose");
+  tcase_add_test(tc, roseFoo);
+
+  return tc;
+}
+
+Suite *suite_rose(void)
+{
+  Suite *s;
+
+  s = suite_create("characterization-tests");
+  suite_add_tcase(s, tcase_rose());
+
+  return s;
+}