ucx: ucx/string.c@bf8ab7bb74ff (annotated)

ucx/string.c@bf8ab7bb74ff (annotated)

ucx/string.c

Tue, 02 Oct 2012 13:43:17 +0200

author: Mike Becker <universe@uap-core.de>
date: Tue, 02 Oct 2012 13:43:17 +0200
changeset 39: bf8ab7bb74ff
parent 31: 91ac86557290
child 47: 22fb97e9f58a
permissions: -rw-r--r--

added sstrsplit function

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

Mercurial > hg > ucx / annotate

ucx/string.c@bf8ab7bb74ff (annotated)

ucx/string.c