Mercurial > hg > ucx / file revision

 /*

  * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS HEADER.

  *

  * Copyright 2016 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 <ctype.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;

 }

 static sstr_t sstrvcat_a(

         UcxAllocator *a,

         size_t count,

         sstr_t s1,

         sstr_t s2,

         va_list ap) {

     sstr_t str;

     str.ptr = NULL;

     str.length = 0;

     if(count < 2) {

         return str;

     }

     sstr_t *strings = (sstr_t*) calloc(count, sizeof(sstr_t));

     if(!strings) {

         return str;

     }

     // get all args and overall length

     strings[0] = s1;

     strings[1] = s2;

     size_t strlen = s1.length + s2.length;

     for (size_t i=2;i<count;i++) {

         sstr_t s = va_arg (ap, sstr_t);

         strings[i] = s;

         strlen += s.length;

     }

     // create new string

     str.ptr = (char*) almalloc(a, strlen + 1);

     str.length = strlen;

     if(!str.ptr) {

         free(strings);

         str.length = 0;

         return str;

     }

     // concatenate strings

     size_t pos = 0;

     for (size_t i=0;i<count;i++) {

         sstr_t s = strings[i];

         memcpy(str.ptr + pos, s.ptr, s.length);

         pos += s.length;

     }

     str.ptr[str.length] = '\0';

     free(strings);

     return str;

 }

 sstr_t sstrcat(size_t count, sstr_t s1, sstr_t s2, ...) {

     va_list ap;

     va_start(ap, s2);

     sstr_t s = sstrvcat_a(ucx_default_allocator(), count, s1, s2, ap);

     va_end(ap);

     return s;

 }

 sstr_t sstrcat_a(UcxAllocator *a, size_t count, sstr_t s1, sstr_t s2, ...) {

     va_list ap;

     va_start(ap, s2);

     sstr_t s = sstrvcat_a(a, count, s1, s2, ap);

     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 >= s.length) {

         new_sstr.ptr = NULL;

         new_sstr.length = 0;

     } else {

         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;i>0;i--) {

             if(s.ptr[i-1] == c) {

                 return sstrsubs(s, i-1);

             }

         }

     }

     sstr_t n;

     n.ptr = NULL;

     n.length = 0;

     return n;

 }

 sstr_t sstrstr(sstr_t string, sstr_t match) {

     if (match.length == 0) {

         return string;

     }

     for (size_t i = 0 ; i < string.length ; i++) {

         sstr_t substr = sstrsubs(string, i);

         if (sstrprefix(substr, match)) {

             return substr;

         }

     }

     sstr_t emptystr;

     emptystr.length = 0;

     emptystr.ptr = NULL;

     return emptystr;

 }

 sstr_t* sstrsplit(sstr_t s, sstr_t d, ssize_t *n) {

     return sstrsplit_a(ucx_default_allocator(), s, d, n);

 }

 sstr_t* sstrsplit_a(UcxAllocator *allocator, sstr_t s, sstr_t d, ssize_t *n) {

     if (s.length == 0 || d.length == 0) {

         *n = -1;

         return NULL;

     }

     /* special cases: delimiter is at least as large as the string */

     if (d.length >= s.length) {

         /* exact match */

         if (sstrcmp(s, d) == 0) {

             *n = 0;

             return NULL;

         } else /* no match possible */ {

             *n = 1;

             sstr_t *result = (sstr_t*) almalloc(allocator, sizeof(sstr_t));

             result->ptr = (char*) almalloc(allocator, 1+s.length);

             memcpy(result->ptr, s.ptr, s.length);

             result->ptr[s.length] = '\0';

             result->length = s.length;

             return result;

         }

     }

     sstr_t* result;

     ssize_t nmax = *n;

     *n = 1;

     sstr_t sv = sstrdup(s);

     if (sv.length == 0) {

         *n = -2;

         return NULL;

     }

     for (size_t i = 0 ; i < s.length ; i++) {

         sstr_t substr = sstrsubs(sv, i);

         if (sstrprefix(substr, d)) {

             (*n)++;

             for (size_t j = 0 ; j < d.length ; j++) {

                 sv.ptr[i+j] = 0;

             }

             i += d.length - 1; // -1, because the loop will do a i++

         }

         if ((*n) == nmax) break;

     }

     result = (sstr_t*) almalloc(allocator, sizeof(sstr_t)*(*n));

     if (result) {

         char *pptr = sv.ptr;

         for (ssize_t i = 0 ; i < *n ; i++) {

             size_t l = strlen(pptr);

             char* ptr = (char*) almalloc(allocator, l + 1);

             if (ptr) {

                 memcpy(ptr, pptr, l);

                 ptr[l] = '\0';

                 result[i] = sstrn(ptr, l);

                 pptr += l + d.length;

             } else {

                 for (ssize_t j = i-1 ; j >= 0 ; j--) {

                     alfree(allocator, result[j].ptr);

                 }

                 alfree(allocator, result);

                 *n = -2;

                 break;

             }

         }

     } 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;

     }

 }

 int sstrcasecmp(sstr_t s1, sstr_t s2) {

     if (s1.length == s2.length) {

 #ifdef _WIN32

         return _strnicmp(s1.ptr, s2.ptr, s1.length);

 #else

         return strncasecmp(s1.ptr, s2.ptr, s1.length);

 #endif

     } 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*)almalloc(allocator, 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;

     while (newstr.length > 0 && isspace(*newstr.ptr)) {

         newstr.ptr++;

         newstr.length--;

     }

     while (newstr.length > 0 && isspace(newstr.ptr[newstr.length-1])) {

         newstr.length--;

     }

     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;

     }

 }

 sstr_t sstrlower(sstr_t string) {

     sstr_t ret = sstrdup(string);

     for (size_t i = 0; i < ret.length ; i++) {

         ret.ptr[i] = tolower(ret.ptr[i]);

     }

     return ret;

 }

 sstr_t sstrlower_a(UcxAllocator *allocator, sstr_t string) {

     sstr_t ret = sstrdup_a(allocator, string);

     for (size_t i = 0; i < ret.length ; i++) {

         ret.ptr[i] = tolower(ret.ptr[i]);

     }

     return ret;

 }

 sstr_t sstrupper(sstr_t string) {

     sstr_t ret = sstrdup(string);

     for (size_t i = 0; i < ret.length ; i++) {

         ret.ptr[i] = toupper(ret.ptr[i]);

     }

     return ret;

 }

 sstr_t sstrupper_a(UcxAllocator *allocator, sstr_t string) {

     sstr_t ret = sstrdup_a(allocator, string);

     for (size_t i = 0; i < ret.length ; i++) {

         ret.ptr[i] = toupper(ret.ptr[i]);

     }

     return ret;

 }