C: nucleotide-count & rna-transcription

c/rna-transcription/src/rna_transcription.c

@@ -0,0 +1,37 @@
+#include <malloc.h>
+#include <string.h>
+#include "rna_transcription.h"
+
+static char C[256]={
+    ['G']='C', ['C']='G', ['T']='A', ['A']='U',
+};
+
+char *to_rna(const char *dna)
+{
+    char *rna=malloc(strlen(dna+1)), *p;
+
+    if (rna) {
+        for (p=rna; *dna; p++, dna++) {
+            if (!(*p=C[(int)*dna])) {
+                free(rna);
+                return NULL;
+            }
+        }
+        *p=0;
+    }
+    return rna;
+}
+
+/* See GNUmakefile below for explanation
+ * https://github.com/braoult/exercism/blob/master/c/templates/GNUmakefile
+ */
+#ifdef UNIT_TEST
+int main(int ac, char **av)
+{
+    int arg=1;
+
+    for (; arg<ac; ++arg) {
+        printf("rna(%s)=%s\n", av[arg], to_rna(av[arg]));
+    }
+}
+#endif

c/rna-transcription/src/rna_transcription.h

@@ -0,0 +1,18 @@
+#ifndef RNA_TRANSCRIPTION_H
+#define RNA_TRANSCRIPTION_H
+
+char *to_rna(const char *dna);
+
+/* See GNUmakefile below for explanation
+ * https://github.com/braoult/exercism/blob/master/c/templates/GNUmakefile
+ */
+#if defined UNIT_TEST || defined DEBUG
+#include <stdio.h>
+#include <stdlib.h>
+#endif
+#ifdef  TESTALL
+#undef  TEST_IGNORE
+#define TEST_IGNORE() {}
+#endif
+
+#endif