simple english test

CMakeLists.txt

@@ -16,6 +16,7 @@ set(SOURCES
         src/vector.c
         src/utility.c
         src/crypto.c
+        src/parsing.c
 )
 
 if ((${CMAKE_SYSTEM_NAME} STREQUAL "Darwin"))

docs/parsing.md

@@ -0,0 +1,14 @@
+# parsing
+
+String parsing tools
+
+## Functions
+
+### simple_english_scoring
+
+Scores a string based on a simple ETAOIN SHRDLU scale. A simple, somewhat accurate way to determine if a string is 
+English.
+
+```c
+int simple_english_scoring(const char *s);
+```

include/lfparsing.h

@@ -0,0 +1,6 @@
+#ifndef LIBFLINT_H_PARSING
+#define LIBFLINT_H_PARSING
+
+int simple_english_scoring(const char *s);
+
+#endif // LIBFLINT_H_PARSING

src/parsing.c

@@ -0,0 +1,27 @@
+#include "lfparsing.h"
+
+static int ses_score_sw(char c) {
+    switch (c) {
+        case 'e': case 'E': return 12;
+        case 't': case 'T': return 11;
+        case 'a': case 'A': return 10;
+        case 'o': case 'O': return 9;
+        case 'i': case 'I': return 8;
+        case 'n': case 'N': return 7;
+        case 's': case 'S': return 6;
+        case 'h': case 'H': return 5;
+        case 'r': case 'R': return 4;
+        case 'd': case 'D': return 3;
+        case 'l': case 'L': return 2;
+        case 'u': case 'U': return 1;
+        default: return 0;
+    }
+}
+
+int simple_english_scoring(const char *s) {
+    int score = 0;
+    for (const char *c = s; *c != '\0'; ++c) {
+        score += ses_score_sw(*c);
+    }
+    return score;
+}

tests/tests.c

@@ -11,6 +11,7 @@
 #include "lfmath.h"
 #include "lfstring.h"
 #include "lfcrypto.h"
+#include "lfparsing.h"
 
 #if defined(__APPLE__) || defined(__MACH__)
 #include "lfmacos.h"
@@ -310,6 +311,8 @@ void test_string() {
 }
 
 void test_crypto() {
+    printf("\n--- CRYPTO TEST ---\n");
+
     char *in = "BUTT";
     unsigned char *s = b64_encode(in, strlen(in));
     assert(strcmp(s, "QlVUVA==") == 0);
@@ -357,6 +360,18 @@ void test_crypto() {
     s = hex_to_str(hexsup, 4);
     assert(strcmp(s, "Sup?") == 0);
     free(s);
+
+    printf("Passes all crypto tests\n");
+}
+
+void test_parsing() {
+    printf("\n--- PARSING TEST ---\n");
+
+    char *nonsense = "8d82jI|dms~<>s2d";
+    char *english = "This is an English sentence!";
+    assert(simple_english_scoring(english) > simple_english_scoring(nonsense));
+
+    printf("Passes all parsing tests\n");
 }
 
 #if defined(__APPLE__) || defined(__MACH__)
@@ -383,6 +398,7 @@ int main() {
     test_vector();
     test_string();
     test_crypto();
+    test_parsing();
 
 #if defined(__APPLE__) || defined(__MACH__)
     test_macos();