str_seek

src/cstr.c

@@ -50,71 +50,3 @@ char* NULLABLE(vsprintf_malloc)(size_t buffer_size, cstr format, va_list argv){
     }
     return buf;
 }
-
-i32 cstr_seek(const char* src, const char* fragment, u32 startIndex, u32 seekLength){
-    char sc = *src, fc = *fragment;
-    if(sc == 0 || fc == 0)
-        return -1;
-    u32 fr_start = startIndex;
-    for(u32 si = startIndex; si-startIndex < seekLength && sc != 0; si++){
-        sc = src[si];
-        fc = fragment[si-fr_start];
-        if(fc == 0)
-            return fr_start;
-        if(sc != fc)
-            fr_start++;
-    }
-    return -1;
-}
-
-i32 cstr_seekReverse(const char* src, const char* fragment, u32 startIndex, u32 seekLength){
-    char sc = *src, fc = *fragment;
-    if(sc == 0 || fc == 0)
-        return -1;
-    i32 len = strlen(src);
-    if(startIndex == (u32)-1)
-        startIndex = len-1;
-    u32 fr_len = strlen(fragment);
-    for(u32 si = startIndex; si < (u32)-1 && si != (len - seekLength - 1); si--){
-        if(si + 1 < fr_len)
-            return -1;
-        sc = src[si];
-        fc = fragment[0];
-        u32 fr_start = si;
-        for(u32 fi = 0; fc == sc ; fi++){
-            if(fi == fr_len)
-                return fr_start;
-            fc = fragment[fi];
-            sc = src[si--];
-        }
-    }
-    return -1;
-}
-
-
-i32 cstr_seekChar(const char* src, char fragment, u32 startIndex, u32 seekLength){
-    char sc=*src;
-    if(sc==0 || fragment==0)
-        return -1;
-    for(u32 si=startIndex; si-startIndex<seekLength && sc!=0; si++){
-        sc=src[si];
-        if(sc==fragment)
-            return si;
-    }
-    return -1;
-}
-
-i32 cstr_seekCharReverse(const char* src, char fragment, u32 startIndex, u32 seekLength){
-    char sc=*src;
-    if(sc==0 || fragment==0)
-        return -1;
-    i32 len=strlen(src);
-    if(startIndex==(u32)-1)
-        startIndex=len-1;
-    for(u32 si=startIndex; si<(u32)-1 && si!=len-1-seekLength; si--){
-        sc=src[si];
-        if(sc==fragment)
-            return si;
-    }
-    return -1;
-}

src/std.h

@@ -58,23 +58,3 @@ char* NULLABLE(vsprintf_malloc)(size_t buffer_size, cstr format, va_list argv);
 static inline bool isAlphabeticalLower(char c) { return 'a' <= c && c <= 'z'; }
 static inline bool isAlphabeticalUpper(char c) { return 'A' <= c && c <= 'Z'; }
 static inline bool isDigit(char c) { return '0' <= c && c <= '9'; }
-
-/// @param startIndex 0 ... src length
-/// @param seekLength 0 ... -1
-/// @return pos of first <fragment> inclusion in <src> or -1 if not found
-i32 cstr_seek(const char* src, const char* fragment, u32 startIndex, u32 seekLength);
-
-/// @param startIndex -1 ... src length
-/// @param seekLength 0 ... -1
-/// @return pos of first <fragment> inclusion in <src> or -1 if not found
-i32 cstr_seekReverse(const char* src, const char* fragment, u32 startIndex, u32 seekLength);
-
-/// @param startIndex 0 ... src length
-/// @param seekLength 0 ... -1
-/// @return pos of first <fragment> inclusion in <src> or -1 if not found
-i32 cstr_seekChar(const char* src, char fragment, u32 startIndex, u32 seekLength);
-
-/// @param startIndex -1 ... src length
-/// @param seekLength 0 ... -1
-/// @return pos of first <fragment> inclusion in <src> or -1 if not found
-i32 cstr_seekCharReverse(const char* src, char fragment, u32 startIndex, u32 seekLength);

src/string/str.c

@@ -3,27 +3,97 @@
 str str_copy(str src){
     if(src.data == NULL || src.len == 0)
         return src;
+    
     str nstr = str_construct((char*)malloc(src.len + 1), src.len, true);
     memcpy(nstr.data, src.data, src.len);
     nstr.data[nstr.len] = '\0';
     return nstr;
 }
 
-bool str_compare(str str0, str str1){
-    if(str0.len!= str1.len) return false;
-    if(!str0.data) return str1.data ? false : true;
-    else if(!str1.data) return false;
-    while(str0.len-- > 0)
-        if(*str0.data++ != *str1.data++ ) 
+bool str_equals(str s0, str s1){
+    if(s0.len != s1.len)
         return false;
+    
+    for(u32 i = 0; i < s0.len; i++)
+        if(s0.data[i] != s1.data[i]) 
+            return false;
+    
     return true;
 }
 
 str str_reverse(str s){
     if(s.data == NULL || s.len == 0)
         return s;
+    
     str r = str_construct(malloc(s.len), s.len, s.isZeroTerminated);
     for(u32 i = 0; i < s.len; i++ )
         r.data[i] = s.data[s.len - i - 1];
     return r;
 }
+
+i32 str_seek(str src, str fragment, u32 startIndex){
+    if(src.len == 0 || fragment.len == 0)
+        return -1;
+    
+    for(u32 i = startIndex; i < src.len - fragment.len + 1; i++){
+        for(u32 j = 0;; j++){
+            if(j == fragment.len)
+                return i;
+            if(src.data[i + j] != fragment.data[j])
+                break;
+        }
+    }
+    return -1;
+}
+
+i32 str_seekReverse(str src, str fragment, u32 startIndex){
+    if(src.len == 0 || fragment.len == 0)
+        return -1;
+    
+    if(startIndex > src.len - 1)
+        startIndex = src.len - 1;
+    for(u32 i = startIndex; i >= fragment.len - 1; i--){
+        for(u32 j = 0;; j++){
+            if(j == fragment.len)
+                return i - j + 1;
+            if(src.data[i - j] != fragment.data[fragment.len - 1 - j])
+                break;
+        }
+    }
+    return -1;
+}
+
+i32 str_seekChar(str src, char c, u32 startIndex){
+    for(u32 i = startIndex; i < src.len; i++){
+        if(src.data[i] == c)
+            return i;
+    }
+    return -1;
+}
+
+i32 str_seekCharReverse(str src, char c, u32 startIndex){
+    if(startIndex > src.len - 1)
+        startIndex = src.len - 1;
+    for(u32 i = startIndex; i != (u32)-1; i--){
+        if(src.data[i] == c)
+            return i;
+    }
+    return -1;
+}
+
+bool str_startsWith(str src, str fragment){
+    if(src.len < fragment.len)
+        return false;
+    
+    src.len = fragment.len;
+    return str_equals(src, fragment);
+}
+
+bool str_endsWith(str src, str fragment){
+    if(src.len < fragment.len)
+        return false;
+    
+    src.data = (char*)(src.data + src.len - fragment.len);
+    src.len = fragment.len;
+    return str_equals(src, fragment);
+}

src/string/str.h

@@ -8,23 +8,27 @@ typedef struct str {
     bool isZeroTerminated;
 } str;
 
+// creates str from a string literal
+#define STR(LITERAL) str_construct(LITERAL, ARRAY_SIZE(LITERAL) - 1, true)
+
 #define str_construct(DATA, LEN, ZERO_TERMINATED) ((str){ .data = DATA, .len = LEN, .isZeroTerminated = ZERO_TERMINATED })
 
 static const str str_null = str_construct(NULL, 0, 0);
 
-
-/// copies str content to new char pointer value (adding '\0' at the end)
-char* str_extractcstr(str str);
-
 /// copies src content to new string and adds \0 at the end
 str str_copy(str src);
 
 /// compares two strings, NullPtr-friendly
-bool str_compare(str str0, str str1);
+bool str_equals(str str0, str str1);
 
 /// allocates new string which is reversed variant of <s>
 str str_reverse(str s);
 
-#if __cplusplus
-}
-#endif
+i32 str_seek(str src, str fragment, u32 startIndex);
+i32 str_seekReverse(str src, str fragment, u32 startIndex);
+
+i32 str_seekChar(str src, char c, u32 startIndex);
+i32 str_seekCharReverse(str src, char c, u32 startIndex);
+
+bool str_startsWith(str src, str fragment);
+bool str_endsWith(str src, str fragment);