[Sync Iteration] c/nucleotide-count/1

solutions/c/nucleotide-count/1/nucleotide_count.c

@@ -0,0 +1,31 @@
+#include "nucleotide_count.h"
+#include <inttypes.h>
+#include <stdio.h>
+#include <stdlib.h>
+#include <string.h>
+
+
+char *count(const char *dna_strand) {
+    uint32_t a, c, g, t;
+    a = c = g = t = 0;
+
+    for (int i = 0; dna_strand[i] != '\0'; i++) {
+        switch (dna_strand[i]) {
+            case 'A': a++; break;
+            case 'C': c++; break;
+            case 'G': g++; break;
+            case 'T': t++; break;
+            default: 
+                  return strdup("");
+        }
+    }
+
+    char *result = malloc(BUFSIZE * sizeof(char));
+    snprintf(
+        result, BUFSIZE, 
+        "A:%" PRIu32 " C:%" PRIu32 " G:%" PRIu32 " T:%" PRIu32, 
+        a, c, g, t
+    );
+
+    return result;
+}

solutions/c/nucleotide-count/1/nucleotide_count.h

@@ -0,0 +1,14 @@
+#ifndef NUCLEOTIDE_COUNT_H
+#define NUCLEOTIDE_COUNT_H
+
+/*         4   nucleotides
+*  10*4 char   uint32 representation
+*   2*4 char   name and separator
+*   4-1 char   spaces
+*     1 char   string terminator
+*/
+#define BUFSIZE 64
+
+char *count(const char *dna_strand);
+
+#endif