ucx: ucx/string.c@fbbff331beba (annotated)

ucx/string.c@fbbff331beba (annotated)

ucx/string.c

Wed, 27 Feb 2013 13:53:28 +0100

author: Olaf Wintermann <olaf.wintermann@gmail.com>
date: Wed, 27 Feb 2013 13:53:28 +0100
changeset 96: fbbff331beba
parent 95: ecfdc1c4a552
child 97: 499e1b465d77
permissions: -rw-r--r--

added sstrtrim

 /*
  * File:   sstring.c
  * Author: olaf
  *
  * Created on 17. Juni 2010, 13:27
  */
 #include <stdlib.h>
 #include <string.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 (size_t 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;
     size_t len = s.length;
     size_t cplen = c1.length > len ? len : c1.length;
     char   *ptr = s.ptr;
     memcpy(ptr, c1.ptr, cplen);
     len -= cplen;
     ptr += cplen;
     for (size_t i = 0 ; i < n-1 ; i++) {
         sstr_t str = va_arg (ap, sstr_t);
         cplen = str.length > len ? len : str.length;
         if(cplen <= 0) {
             va_end(ap);
             return s;
         }
         memcpy(ptr, str.ptr, cplen);
         len -= cplen;
         ptr += cplen;
     }
     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) {
         *n = 0;
         return NULL;
     }
     sstr_t sv = sstrdup(s);
     for (size_t i = 0 ; i < s.length ; i++) {
         if (sv.ptr[i] == d.ptr[0]) {
             _Bool match = 1;
             for (size_t 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 (size_t j = 0 ; j < d.length ; j++) {
                     sv.ptr[i+j] = 0;
                 }
                 i += d.length;
             }
         }
         if ((*n) == nmax) break;
     }
     result = (sstr_t*) malloc(sizeof(sstr_t) * (*n));
     char *pptr = sv.ptr;
     for (size_t i = 0 ; i < *n ; i++) {
         size_t l = strlen(pptr);
         char* ptr = (char*) 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);
     newstring.length = 0;
     if (newstring.ptr) {
         newstring.length = s.length;
         newstring.ptr[newstring.length] = 0;
         memcpy(newstring.ptr, s.ptr, s.length);
     } else {
         newstring.length = 0;
     }
     return newstring;
 }
 sstr_t sstrtrim(sstr_t string) {
     sstr_t newstr = string;
     int i;
     for(i=0;i<string.length;i++) {
         char c = string.ptr[i];
         if(c > 32) {
             break;
         }
     }
     newstr.ptr = &string.ptr[i];
     newstr.length = string.length - i;
     for(i=newstr.length-1;i>=0;i--) {
         char c = newstr.ptr[i];
         if(c > 32) {
             break;
         }
     }
     newstr.length = i + 1;
     return newstr;
 }

Mercurial > hg > ucx / annotate

ucx/string.c@fbbff331beba (annotated)

ucx/string.c