Added strstr

include/sv.h

@@ -22,5 +22,11 @@ extern struct String_View sv_trim_right(struct String_View sv);
 extern struct String_View sv_trim(struct String_View sv);
 extern int sv_eq(const struct String_View sv1, const struct String_View sv2);
 extern int sv_casecmp( const struct String_View sv1, const struct String_View sv2);
+extern struct String_View sv_before_delim(const struct String_View sv,
+        const char *delims);
+extern struct String_View sv_after_delim(const struct String_View sv,
+        const char *delims);
+extern struct String_View sv_str_str(const struct String_View haystack, 
+        const struct String_View needle);
 
 #endif

src/sv.c

@@ -56,3 +56,62 @@ int sv_casecmp(const struct String_View sv1, const struct String_View sv2){
     if (i < sv2.len) return -1;
     return 0;
 }
+
+struct String_View sv_before_delim(const struct String_View sv,const char *delims){
+    // Handle NULL pointer or empty string view
+    if (sv.buf == NULL || delims == NULL) {
+        return sv_strn(NULL, 0);
+    }
+
+    size_t i = 0;
+    while (i < sv.len) {
+        // Check if the current character is a delimiter
+        for (size_t j = 0; delims[j] != '\0'; j++) {
+            if (sv.buf[i] == delims[j]) {
+                struct String_View result = sv_strn(sv.buf, i);
+                return result;
+            }
+        }
+        i++;
+    }
+
+    // Return the whole string if no delimiter was found
+    struct String_View result = sv_strn(sv.buf, i);
+    return result;
+
+}
+struct String_View sv_after_delim(const struct String_View sv, const char *delims){
+    // Handle NULL pointer or empty string view
+    if (sv.buf == NULL || delims == NULL) {
+        return sv_strn(NULL, 0);
+    }
+
+    size_t i = 0;
+    while (i < sv.len) {
+        // Check if the current character is a delimiter
+        for (size_t j = 0; delims[j] != '\0'; j++) {
+            if (sv.buf[i] == delims[j]) {
+                struct String_View result = sv_strn(sv.buf+i+1, sv.len-i-1);
+                return result;
+            }
+        }
+        i++;
+    }
+
+    // Return the whole string if no delimiter was found
+    struct String_View result = sv_strn(sv.buf, i);
+    return result;
+}
+
+struct String_View sv_str_str(const struct String_View haystack, const struct String_View needle){
+    size_t i;
+    if (needle.len > haystack.len) return sv_strn(NULL,0);
+    if (needle.len == 0) return haystack;
+    for (i = 0; i <= haystack.len - needle.len; i++) {
+        if (memcmp(haystack.buf + i, needle.buf, needle.len) == 0) {
+            return sv_strn(haystack.buf + i, haystack.len -i);
+        }
+    }
+    return sv_strn(NULL,0);
+}
+

tests/08_sv_before_delims.c

@@ -0,0 +1,18 @@
+#define DEBUG
+#include <stdlib.h>
+#include <assert.h>
+#include <string.h>
+#include <stdio.h>
+#include "../include/sv.h"
+
+int main(void){
+    const char *s = "Hello World!,Goodbye World!";
+    const char *s3 = "Hello World!";
+
+    struct String_View sv = sv_strn(s, strlen(s));
+    struct String_View sv2 = sv_before_delim(sv,",");
+    assert(sv2.len == strlen(s3));
+    assert( memcmp(sv2.buf, s3, sv2.len) == 0);
+
+    return EXIT_SUCCESS;
+}

tests/09_after_delims.c

@@ -0,0 +1,18 @@
+#define DEBUG
+#include <stdlib.h>
+#include <assert.h>
+#include <string.h>
+#include <stdio.h>
+#include "../include/sv.h"
+
+int main(void){
+    const char *s = "Hello World!,Goodbye World!";
+    const char *s3 = "Goodbye World!";
+
+    struct String_View sv = sv_strn(s, strlen(s));
+    struct String_View sv2 = sv_after_delim(sv,",");
+    assert(sv2.len == strlen(s3));
+    assert( memcmp(sv2.buf, s3, sv2.len) == 0);
+
+    return EXIT_SUCCESS;
+}

tests/10_strstr.c

@@ -0,0 +1,20 @@
+#define DEBUG
+#include <stdlib.h>
+#include <assert.h>
+#include <string.h>
+#include <stdio.h>
+#include "../include/sv.h"
+
+int main(void){
+    const char *s = "Hello World!,Goodbye World!";
+    const char *n = "Goodbye";
+    const char *test = "Goodbye World!";   
+    struct String_View sv = sv_strn(s, strlen(s));
+    struct String_View sv2 = sv_strn(n, strlen(n));
+
+    struct String_View found = sv_str_str(sv, sv2);
+    assert(found.len == strlen(test));
+    assert( memcmp(found.buf, test, found.len) == 0);
+
+    return EXIT_SUCCESS;
+}