olaf@20: /*
olaf@20:  * File:   sstring.c
olaf@20:  * Author: olaf
olaf@20:  *
olaf@20:  * Created on 17. Juni 2010, 13:27
olaf@20:  */
olaf@20: 
olaf@20: #include <stdlib.h>
olaf@30: #include <strings.h>
olaf@20: #include <stdarg.h>
olaf@20: 
olaf@20: #include "string.h"
olaf@20: 
olaf@20: sstr_t sstr (char *s) {
olaf@20:     sstr_t string;
olaf@20:     string.ptr = s;
olaf@20:     string.length = strlen(s);
olaf@20:     return string;
olaf@20: }
olaf@20: 
olaf@20: sstr_t sstrn (char *s, size_t n) {
olaf@20:     sstr_t string;
olaf@20:     string.ptr = s;
olaf@20:     string.length = n;
olaf@20:     return string;
olaf@20: }
olaf@20: 
olaf@20: size_t sstrnlen (size_t n, sstr_t s, ...) {
olaf@20:     va_list ap;
olaf@20:     size_t size = s.length;
olaf@20:     va_start(ap, s);
olaf@20: 
olaf@20:     for (int i=0;i<n-1;i++) {
olaf@20:         sstr_t str = va_arg(ap, sstr_t);
olaf@20:         size += str.length;
olaf@20:     }
universe@24:     va_end(ap);
olaf@20: 
olaf@20:     return size;
olaf@20: }
olaf@20: 
olaf@20: sstr_t sstrcat (sstr_t s, ...) {
olaf@20:     va_list ap;
olaf@20:     va_start(ap, s);
olaf@20:     s.ptr[0] = 0;
olaf@20: 
olaf@20:     sstr_t str = va_arg (ap, sstr_t);
olaf@20:     while (str.ptr != NULL) {
olaf@20:         s.ptr = strncat (s.ptr, str.ptr, s.length);
olaf@20:         str = va_arg (ap, sstr_t);
olaf@20:     }
universe@24:     va_end(ap);
olaf@20: 
olaf@20:     return s;
olaf@20: }
olaf@20: 
olaf@20: sstr_t sstrncat (size_t n, sstr_t s, sstr_t c1, ...) {
olaf@20:     va_list ap;
olaf@20:     va_start(ap, c1);
olaf@20:     s.ptr[0] = 0;
olaf@20: 
olaf@20:     s.ptr = strncat (s.ptr, c1.ptr, s.length);
olaf@20:     for (int i=0;i<n-1;i++) {
olaf@20:         sstr_t str = va_arg (ap, sstr_t);
olaf@20:         s.ptr = strncat (s.ptr, str.ptr, s.length);
olaf@20:     }
universe@24:     va_end(ap);
olaf@20: 
olaf@20:     return s;
olaf@20: }
olaf@20: 
olaf@20: sstr_t sstrsubs (sstr_t s, size_t start) {
olaf@20:     return sstrsubsl (s, start, s.length-start);
olaf@20: }
olaf@20: 
olaf@20: sstr_t sstrsubsl (sstr_t s, size_t start, size_t length) {
olaf@20:     sstr_t new_sstr;
olaf@20:     if (start < 0 || start >= s.length || length < 0) {
olaf@20:         return s;
olaf@20:     }
olaf@20:     if (length > s.length-start) {
olaf@20:         length = s.length-start;
olaf@20:     }
olaf@20:     new_sstr.ptr = &s.ptr[start];
olaf@20:     new_sstr.length = length;
olaf@20:     return new_sstr;
olaf@20: }
olaf@20: 
universe@39: sstr_t* sstrsplit(sstr_t s, sstr_t d, size_t *n) {
universe@39:     if (d.length == 0) {
universe@39:         return NULL;
universe@39:     }
universe@39: 
universe@39:     sstr_t* result;
universe@39:     size_t nmax = *n;
universe@39:     *n = 1;
universe@39: 
universe@39:     /* special case: exact match - no processing needed */
universe@39:     if (s.length == d.length && strncmp(s.ptr, d.ptr, s.length) == 0) {
universe@39:         result = malloc(sizeof(sstr_t));
universe@39:         result[0] = sstrn("", 0);
universe@39:         return result;
universe@39:     }
universe@39:     sstr_t sv = sstrdup(s);
universe@39: 
universe@39:     for (int i = 0 ; i < s.length ; i++) {
universe@39:         if (sv.ptr[i] == d.ptr[0]) {
universe@39:             _Bool match = 1;
universe@39:             for (int j = 1 ; j < d.length ; j++) {
universe@39:                 if (j+i < s.length) {
universe@39:                     match &= (sv.ptr[i+j] == d.ptr[j]);
universe@39:                 } else {
universe@39:                     match = 0;
universe@39:                     break;
universe@39:                 }
universe@39:             }
universe@39:             if (match) {
universe@39:                 (*n)++;
universe@39:                 for (int j = 0 ; j < d.length ; j++) {
universe@39:                     sv.ptr[i+j] = 0;
universe@39:                 }
universe@39:                 i += d.length;
universe@39:             }
universe@39:         }
universe@39:         if ((*n) == nmax) break;
universe@39:     }
universe@39:     result = malloc(sizeof(sstr_t) * (*n));
universe@39: 
universe@39:     char *pptr = sv.ptr;
universe@39:     for (int i = 0 ; i < *n ; i++) {
universe@39:         size_t l = strlen(pptr);
universe@39:         char* ptr = malloc(l + 1);
universe@39:         memcpy(ptr, pptr, l);
universe@39:         ptr[l] = 0;
universe@39: 
universe@39:         result[i] = sstrn(ptr, l);
universe@39:         pptr += l + d.length;
universe@39:     }
universe@39: 
universe@39:     free(sv.ptr);
universe@39: 
universe@39:     return result;
universe@39: }
universe@39: 
olaf@20: int sstrcmp(sstr_t s1, sstr_t s2) {
olaf@20:     return strncmp(s1.ptr, s2.ptr, s1.length>s2.length ? s2.length: s1.length);
olaf@20: }
olaf@20: 
olaf@31: sstr_t sstrdup(sstr_t s) {
olaf@20:     sstr_t newstring;
universe@24:     newstring.ptr = (char*) malloc(s.length + 1);
universe@24:     if (newstring.ptr != NULL) {
universe@24:         newstring.length = s.length;
universe@24:         newstring.ptr[newstring.length] = 0;
olaf@20: 
universe@24:         memcpy(newstring.ptr, s.ptr, s.length);
universe@24:     }
olaf@20: 
olaf@20:     return newstring;
olaf@20: }