preliminary implimentation of dynamic-sized input

caesarcrypt.vcxproj

@@ -13,12 +13,14 @@
   <ItemGroup>
     <ClCompile Include="src\caesarcrypt.c" />
     <ClCompile Include="src\crypt.c" />
+    <ClCompile Include="src\dyninput.c" />
   </ItemGroup>
   <ItemGroup>
     <None Include="caesarcrypt.licenseheader" />
   </ItemGroup>
   <ItemGroup>
     <ClInclude Include="src\crypt.h" />
+    <ClInclude Include="src\dyninput.h" />
   </ItemGroup>
   <PropertyGroup Label="Globals">
     <VCProjectVersion>16.0</VCProjectVersion>

caesarcrypt.vcxproj.filters

@@ -21,6 +21,9 @@
     <ClCompile Include="src\crypt.c">
       <Filter>Source Files</Filter>
     </ClCompile>
+    <ClCompile Include="src\dyninput.c">
+      <Filter>Source Files</Filter>
+    </ClCompile>
   </ItemGroup>
   <ItemGroup>
     <None Include="caesarcrypt.licenseheader" />
@@ -29,5 +32,8 @@
     <ClInclude Include="src\crypt.h">
       <Filter>Header Files</Filter>
     </ClInclude>
+    <ClInclude Include="src\dyninput.h">
+      <Filter>Source Files</Filter>
+    </ClInclude>
   </ItemGroup>
 </Project>

src/caesarcrypt.c

@@ -9,6 +9,7 @@
 */
 
 #include "crypt.h"
+#include "dyninput.h"
 
 #include <stdio.h>
 #include <stdlib.h>
@@ -28,10 +29,11 @@ int main()
 	fgets(buf, 3, stdin);
 	int choice = strtol(buf, NULL, 10);
 	
-	char* msg = calloc(128, sizeof(char));
+	//char* msg = calloc(128, sizeof(char));
 
 	fputs("Enter your message text: ", stdout);
-	if (msg) fgets(msg, 128, stdin);
+	//if (msg) fgets(msg, 128, stdin);
+	char* msg = dyninput_str(INT64_MAX);
 
 	fputs("Enter your key (shift value): ", stdout);
 	fgets(buf, 4, stdin);
@@ -56,5 +58,7 @@ int main()
 		}
 	}
 
+	free(msg);
+	msg = NULL;
 	return 0;
 }

src/dyninput.c

@@ -0,0 +1,47 @@
+/*
+  * Filename: dyninput.c
+  * Authors(s): Roland (Roland@example.com)
+  * Description: Short description here
+  *
+  * This Source Code Form is subject to the terms of the Mozilla Public
+  * License, v. 2.0. If a copy of the MPL was not distributed with this
+  * file, You can obtain one at https://mozilla.org/MPL/2.0/.
+*/
+
+#include <stdint.h>
+#include <stdlib.h>
+#include <stdio.h>
+
+
+char* dyninput_str(int_least64_t maxsize)
+{
+    char* str = malloc(3 * sizeof(char));
+    /*if (!str)
+        puts("Error allocating memory!");
+        return NULL;*/
+
+    int_least64_t size = 3, i = 0;
+    char c = 0;
+
+    do
+    {
+        c = getchar();
+        if (i + 2 == size)
+        {
+            char* tmp = realloc(str, size + 1);
+            if (!tmp)
+            {
+                puts("Error (re)allocating memory!");
+                return NULL;
+            }
+            str = tmp;
+            size++;
+        }
+
+        str[i] = c;
+        i++;
+    } while (c && c != '\n');
+    str[i] = '\0';
+
+    return str;
+}

src/dyninput.h

@@ -0,0 +1,16 @@
+/*
+  * Filename: dyninput.h
+  * Authors(s): Roland (r.weirhowell@gmail.com)
+  * Description: Header file for dyninput.c
+  *
+  * This Source Code Form is subject to the terms of the Mozilla Public
+  * License, v. 2.0. If a copy of the MPL was not distributed with this
+  * file, You can obtain one at https://mozilla.org/MPL/2.0/.
+*/
+
+#pragma once
+
+#include <stdint.h>
+
+
+char* dyninput_str(int_least64_t maxsize);