ucx: ucx/string.c@c27c2425c0b1 (annotated)

ucx/string.c@c27c2425c0b1 (annotated)

ucx/string.c

Mon, 19 Aug 2013 10:44:11 +0200

author: Mike Becker <universe@uap-core.de>
date: Mon, 19 Aug 2013 10:44:11 +0200
changeset 148: c27c2425c0b1
parent 146: aa376dba1ba8
child 149: 3bf87676d42d
permissions: -rw-r--r--

added sstrrchr

 /*
  * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS HEADER.
  *
  * Copyright 2013 Olaf Wintermann. All rights reserved.
  *
  * Redistribution and use in source and binary forms, with or without
  * modification, are permitted provided that the following conditions are met:
  *
  *   1. Redistributions of source code must retain the above copyright
  *      notice, this list of conditions and the following disclaimer.
  *
  *   2. Redistributions in binary form must reproduce the above copyright
  *      notice, this list of conditions and the following disclaimer in the
  *      documentation and/or other materials provided with the distribution.
  *
  * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
  * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
  * ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE
  * LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
  * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
  * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
  * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
  * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
  * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
  * POSSIBILITY OF SUCH DAMAGE.
  */
 #include <stdlib.h>
 #include <string.h>
 #include <stdarg.h>
 #include "string.h"
 #include "allocator.h"
 sstr_t sstr(char *cstring) {
     sstr_t string;
     string.ptr = cstring;
     string.length = strlen(cstring);
     return string;
 }
 sstr_t sstrn(char *cstring, size_t length) {
     sstr_t string;
     string.ptr = cstring;
     string.length = length;
     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 = 1 ; i < n ; i++) {
         sstr_t str = va_arg(ap, sstr_t);
         size += str.length;
     }
     va_end(ap);
     return size;
 }
 sstr_t sstrncat(sstr_t s, size_t n, 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 = 1 ; i < n ; 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);
     s.length = ptr - s.ptr;
     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 >= s.length) {
         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 sstrchr(sstr_t s, int c) {
     for(size_t i=0;i<s.length;i++) {
         if(s.ptr[i] == c) {
             return sstrsubs(s, i);
         }
     }
     sstr_t n;
     n.ptr = NULL;
     n.length = 0;
     return n;
 }
 sstr_t sstrrchr(sstr_t s, int c) {
     if (s.length > 0) {
         for(size_t i=s.length-1;i>=0;i--) {
             if(s.ptr[i] == c) {
                 return sstrsubs(s, i);
             }
         }
     }
     sstr_t n;
     n.ptr = NULL;
     n.length = 0;
     return n;
 }
 sstr_t* sstrsplit(sstr_t s, sstr_t d, size_t *n) {
     return sstrsplit_a(ucx_default_allocator(), s, d, n);
 }
 sstr_t* sstrsplit_a(UcxAllocator *allocator, sstr_t s, sstr_t d, size_t *n) {
     if (s.length == 0 || d.length == 0) {
         *n = -1;
         return NULL;
     }
     sstr_t* result;
     size_t nmax = *n;
     *n = 1;
     /* special case: exact match - no processing needed */
     if (sstrcmp(s, d) == 0) {
         *n = 0;
         return NULL;
     }
     sstr_t sv = sstrdup(s);
     if (sv.length == 0) {
         *n = -2;
         return NULL;
     }
     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*) allocator->malloc(allocator->pool, sizeof(sstr_t)*(*n));
     if (result) {
         char *pptr = sv.ptr;
         for (size_t i = 0 ; i < *n ; i++) {
             size_t l = strlen(pptr);
             char* ptr = (char*) allocator->malloc(allocator->pool, l + 1);
             memcpy(ptr, pptr, l);
             ptr[l] = 0;
             result[i] = sstrn(ptr, l);
             pptr += l + d.length;
         }
     } else {
         *n = -2;
     }
     free(sv.ptr);
     return result;
 }
 int sstrcmp(sstr_t s1, sstr_t s2) {
     if (s1.length == s2.length) {
         return memcmp(s1.ptr, s2.ptr, s1.length);
     } else if (s1.length > s2.length) {
         return 1;
     } else {
         return -1;
     }
 }
 sstr_t sstrdup(sstr_t s) {
     return sstrdup_a(ucx_default_allocator(), s);
 }
 sstr_t sstrdup_a(UcxAllocator *allocator, sstr_t s) {
     sstr_t newstring;
     newstring.ptr = (char*)allocator->malloc(allocator->pool, s.length + 1);
     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;
     if (string.length == 0) {
         return newstr;
     }
     size_t 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;
     if(newstr.length == 0) {
         return newstr;
     }
     i = newstr.length - 1;
     for(;;) {
         char c = newstr.ptr[i];
         if(c > 32) {
             break;
         }
         if(i > 0) {
             i--;
         } else {
             break;
         }
     }
     newstr.length = i + 1;
     return newstr;
 }
 int sstrprefix(sstr_t string, sstr_t prefix) {
     if (string.length == 0) {
         return prefix.length == 0;
     }
     if (prefix.length == 0) {
         return 1;
     }
     if (prefix.length > string.length) {
         return 0;
     } else {
         return memcmp(string.ptr, prefix.ptr, prefix.length) == 0;
     }
 }
 int sstrsuffix(sstr_t string, sstr_t suffix) {
     if (string.length == 0) {
         return suffix.length == 0;
     }
     if (suffix.length == 0) {
         return 1;
     }
     if (suffix.length > string.length) {
         return 0;
     } else {
         return memcmp(string.ptr+string.length-suffix.length,
             suffix.ptr, suffix.length) == 0;
     }
 }

Mercurial > hg > ucx / annotate

ucx/string.c@c27c2425c0b1 (annotated)

ucx/string.c