universe@39: /*
universe@39:  * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS HEADER.
universe@39:  *
universe@39:  * Copyright 2015 Olaf Wintermann. All rights reserved.
universe@39:  *
universe@39:  * Redistribution and use in source and binary forms, with or without
universe@39:  * modification, are permitted provided that the following conditions are met:
universe@39:  *
universe@39:  *   1. Redistributions of source code must retain the above copyright
universe@39:  *      notice, this list of conditions and the following disclaimer.
universe@39:  *
universe@39:  *   2. Redistributions in binary form must reproduce the above copyright
universe@39:  *      notice, this list of conditions and the following disclaimer in the
universe@39:  *      documentation and/or other materials provided with the distribution.
universe@39:  *
universe@39:  * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
universe@39:  * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
universe@39:  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
universe@39:  * ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE
universe@39:  * LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
universe@39:  * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
universe@39:  * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
universe@39:  * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
universe@39:  * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
universe@39:  * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
universe@39:  * POSSIBILITY OF SUCH DAMAGE.
universe@39:  */
universe@39: 
universe@39: #include <stdlib.h>
universe@39: #include <string.h>
universe@39: #include <stdarg.h>
universe@39: #include <ctype.h>
universe@39: 
universe@39: #include "string.h"
universe@39: #include "allocator.h"
universe@39: 
universe@39: sstr_t sstr(char *cstring) {
universe@39:     sstr_t string;
universe@39:     string.ptr = cstring;
universe@39:     string.length = strlen(cstring);
universe@39:     return string;
universe@39: }
universe@39: 
universe@39: sstr_t sstrn(char *cstring, size_t length) {
universe@39:     sstr_t string;
universe@39:     string.ptr = cstring;
universe@39:     string.length = length;
universe@39:     return string;
universe@39: }
universe@39: 
universe@39: size_t sstrnlen(size_t n, sstr_t s, ...) {
universe@39:     va_list ap;
universe@39:     size_t size = s.length;
universe@39:     va_start(ap, s);
universe@39: 
universe@39:     for (size_t i = 1 ; i < n ; i++) {
universe@39:         sstr_t str = va_arg(ap, sstr_t);
universe@39:         size += str.length;
universe@39:     }
universe@39:     va_end(ap);
universe@39: 
universe@39:     return size;
universe@39: }
universe@39: 
universe@39: static sstr_t sstrvcat_a(
universe@39:         UcxAllocator *a,
universe@39:         size_t count,
universe@39:         sstr_t s1,
universe@39:         sstr_t s2,
universe@39:         va_list ap) {
universe@39:     sstr_t str;
universe@39:     str.ptr = NULL;
universe@39:     str.length = 0;
universe@39:     if(count < 2) {
universe@39:         return str;
universe@39:     }
universe@39:     
universe@39:     sstr_t *strings = (sstr_t*) calloc(count, sizeof(sstr_t));
universe@39:     if(!strings) {
universe@39:         return str;
universe@39:     }
universe@39:     
universe@39:     // get all args and overall length
universe@39:     strings[0] = s1;
universe@39:     strings[1] = s2;
universe@39:     size_t strlen = s1.length + s2.length;
universe@39:     for (size_t i=2;i<count;i++) {
universe@39:         sstr_t s = va_arg (ap, sstr_t);
universe@39:         strings[i] = s;
universe@39:         strlen += s.length;
universe@39:     }
universe@39:     
universe@39:     // create new string
universe@39:     str.ptr = (char*) almalloc(a, strlen + 1);
universe@39:     str.length = strlen;
universe@39:     if(!str.ptr) {
universe@39:         free(strings);
universe@39:         str.length = 0;
universe@39:         return str;
universe@39:     }
universe@39:     
universe@39:     // concatenate strings
universe@39:     size_t pos = 0;
universe@39:     for (size_t i=0;i<count;i++) {
universe@39:         sstr_t s = strings[i];
universe@39:         memcpy(str.ptr + pos, s.ptr, s.length);
universe@39:         pos += s.length;
universe@39:     }
universe@39:     
universe@39:     str.ptr[str.length] = '\0';
universe@39:     
universe@39:     free(strings);
universe@39:     
universe@39:     return str;
universe@39: }
universe@39: 
universe@39: sstr_t sstrcat(size_t count, sstr_t s1, sstr_t s2, ...) {
universe@39:     va_list ap;
universe@39:     va_start(ap, s2);
universe@39:     sstr_t s = sstrvcat_a(ucx_default_allocator(), count, s1, s2, ap);
universe@39:     va_end(ap);
universe@39:     return s;
universe@39: }
universe@39: 
universe@39: sstr_t sstrcat_a(UcxAllocator *a, size_t count, sstr_t s1, sstr_t s2, ...) {
universe@39:     va_list ap;
universe@39:     va_start(ap, s2);
universe@39:     sstr_t s = sstrvcat_a(a, count, s1, s2, ap);
universe@39:     va_end(ap);
universe@39:     return s;
universe@39: }
universe@39: 
universe@39: sstr_t sstrsubs(sstr_t s, size_t start) {
universe@39:     return sstrsubsl (s, start, s.length-start);
universe@39: }
universe@39: 
universe@39: sstr_t sstrsubsl(sstr_t s, size_t start, size_t length) {
universe@39:     sstr_t new_sstr;
universe@39:     if (start >= s.length) {
universe@39:         new_sstr.ptr = NULL;
universe@39:         new_sstr.length = 0;
universe@39:     } else {
universe@39:         if (length > s.length-start) {
universe@39:             length = s.length-start;
universe@39:         }
universe@39:         new_sstr.ptr = &s.ptr[start];
universe@39:         new_sstr.length = length;
universe@39:     }
universe@39:     return new_sstr;
universe@39: }
universe@39: 
universe@39: sstr_t sstrchr(sstr_t s, int c) {
universe@39:     for(size_t i=0;i<s.length;i++) {
universe@39:         if(s.ptr[i] == c) {
universe@39:             return sstrsubs(s, i);
universe@39:         }
universe@39:     }
universe@39:     sstr_t n;
universe@39:     n.ptr = NULL;
universe@39:     n.length = 0;
universe@39:     return n;
universe@39: }
universe@39: 
universe@39: sstr_t sstrrchr(sstr_t s, int c) {
universe@39:     if (s.length > 0) {
universe@39:         for(size_t i=s.length;i>0;i--) {
universe@39:             if(s.ptr[i-1] == c) {
universe@39:                 return sstrsubs(s, i-1);
universe@39:             }
universe@39:         }
universe@39:     }
universe@39:     sstr_t n;
universe@39:     n.ptr = NULL;
universe@39:     n.length = 0;
universe@39:     return n;
universe@39: }
universe@39: 
universe@39: sstr_t sstrstr(sstr_t string, sstr_t match) {
universe@39:     if (match.length == 0) {
universe@39:         return string;
universe@39:     }
universe@39:     
universe@39:     for (size_t i = 0 ; i < string.length ; i++) {
universe@39:         sstr_t substr = sstrsubs(string, i);
universe@39:         if (sstrprefix(substr, match)) {
universe@39:             return substr;
universe@39:         }
universe@39:     }
universe@39:     
universe@39:     sstr_t emptystr;
universe@39:     emptystr.length = 0;
universe@39:     emptystr.ptr = NULL;
universe@39:     return emptystr;
universe@39: }
universe@39: 
universe@39: sstr_t* sstrsplit(sstr_t s, sstr_t d, ssize_t *n) {
universe@39:     return sstrsplit_a(ucx_default_allocator(), s, d, n);
universe@39: }
universe@39: 
universe@39: sstr_t* sstrsplit_a(UcxAllocator *allocator, sstr_t s, sstr_t d, ssize_t *n) {
universe@39:     if (s.length == 0 || d.length == 0) {
universe@39:         *n = -1;
universe@39:         return NULL;
universe@39:     }
universe@39: 
universe@39:     sstr_t* result;
universe@39:     ssize_t nmax = *n;
universe@39:     *n = 1;
universe@39: 
universe@39:     /* special case: exact match - no processing needed */
universe@39:     if (sstrcmp(s, d) == 0) {
universe@39:         *n = 0;
universe@39:         return NULL;
universe@39:     }
universe@39:     sstr_t sv = sstrdup(s);
universe@39:     if (sv.length == 0) {
universe@39:         *n = -2;
universe@39:         return NULL;
universe@39:     }
universe@39: 
universe@39:     for (size_t i = 0 ; i < s.length ; i++) {
universe@39:         sstr_t substr = sstrsubs(sv, i);
universe@39:         if (sstrprefix(substr, d)) {
universe@39:             (*n)++;
universe@39:             for (size_t j = 0 ; j < d.length ; j++) {
universe@39:                 sv.ptr[i+j] = 0;
universe@39:             }
universe@39:             i += d.length - 1; // -1, because the loop will do a i++
universe@39:         }
universe@39:         if ((*n) == nmax) break;
universe@39:     }
universe@39:     result = (sstr_t*) almalloc(allocator, sizeof(sstr_t)*(*n));
universe@39: 
universe@39:     if (result) {
universe@39:         char *pptr = sv.ptr;
universe@39:         for (ssize_t i = 0 ; i < *n ; i++) {
universe@39:             size_t l = strlen(pptr);
universe@39:             char* ptr = (char*) almalloc(allocator, l + 1);
universe@39:             if (ptr) {
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:             } else {
universe@39:                 for (ssize_t j = i-1 ; j >= 0 ; j--) {
universe@39:                     alfree(allocator, result[j].ptr);
universe@39:                 }
universe@39:                 alfree(allocator, result);
universe@39:                 *n = -2;
universe@39:                 break;
universe@39:             }
universe@39:         }
universe@39:     } else {
universe@39:         *n = -2;
universe@39:     }
universe@39:     
universe@39:     free(sv.ptr);
universe@39: 
universe@39:     return result;
universe@39: }
universe@39: 
universe@39: int sstrcmp(sstr_t s1, sstr_t s2) {
universe@39:     if (s1.length == s2.length) {
universe@39:         return memcmp(s1.ptr, s2.ptr, s1.length);
universe@39:     } else if (s1.length > s2.length) {
universe@39:         return 1;
universe@39:     } else {
universe@39:         return -1;
universe@39:     }
universe@39: }
universe@39: 
universe@39: int sstrcasecmp(sstr_t s1, sstr_t s2) {
universe@39:     if (s1.length == s2.length) {
universe@39: #ifdef _WIN32
universe@39:         return _strnicmp(s1.ptr, s2.ptr, s1.length);
universe@39: #else
universe@39:         return strncasecmp(s1.ptr, s2.ptr, s1.length);
universe@39: #endif
universe@39:     } else if (s1.length > s2.length) {
universe@39:         return 1;
universe@39:     } else {
universe@39:         return -1;
universe@39:     }
universe@39: }
universe@39: 
universe@39: sstr_t sstrdup(sstr_t s) {
universe@39:     return sstrdup_a(ucx_default_allocator(), s);
universe@39: }
universe@39: 
universe@39: sstr_t sstrdup_a(UcxAllocator *allocator, sstr_t s) {
universe@39:     sstr_t newstring;
universe@39:     newstring.ptr = (char*)almalloc(allocator, s.length + 1);
universe@39:     if (newstring.ptr) {
universe@39:         newstring.length = s.length;
universe@39:         newstring.ptr[newstring.length] = 0;
universe@39:         
universe@39:         memcpy(newstring.ptr, s.ptr, s.length);
universe@39:     } else {
universe@39:         newstring.length = 0;
universe@39:     }
universe@39:     
universe@39:     return newstring;
universe@39: }
universe@39: 
universe@39: sstr_t sstrtrim(sstr_t string) {
universe@39:     sstr_t newstr = string;
universe@39:     
universe@39:     while (newstr.length > 0 && isspace(*newstr.ptr)) {
universe@39:         newstr.ptr++;
universe@39:         newstr.length--;
universe@39:     }
universe@39:     while (newstr.length > 0 && isspace(newstr.ptr[newstr.length-1])) {
universe@39:         newstr.length--;
universe@39:     }
universe@39:     
universe@39:     return newstr;
universe@39: }
universe@39: 
universe@39: int sstrprefix(sstr_t string, sstr_t prefix) {
universe@39:     if (string.length == 0) {
universe@39:         return prefix.length == 0;
universe@39:     }
universe@39:     if (prefix.length == 0) {
universe@39:         return 1;
universe@39:     }
universe@39:     
universe@39:     if (prefix.length > string.length) {
universe@39:         return 0;
universe@39:     } else {
universe@39:         return memcmp(string.ptr, prefix.ptr, prefix.length) == 0;
universe@39:     }
universe@39: }
universe@39: 
universe@39: int sstrsuffix(sstr_t string, sstr_t suffix) {
universe@39:     if (string.length == 0) {
universe@39:         return suffix.length == 0;
universe@39:     }
universe@39:     if (suffix.length == 0) {
universe@39:         return 1;
universe@39:     }
universe@39:     
universe@39:     if (suffix.length > string.length) {
universe@39:         return 0;
universe@39:     } else {
universe@39:         return memcmp(string.ptr+string.length-suffix.length,
universe@39:             suffix.ptr, suffix.length) == 0;
universe@39:     }
universe@39: }
universe@39: 
universe@39: sstr_t sstrlower(sstr_t string) {
universe@39:     sstr_t ret = sstrdup(string);
universe@39:     for (size_t i = 0; i < ret.length ; i++) {
universe@39:         ret.ptr[i] = tolower(ret.ptr[i]);
universe@39:     }
universe@39:     return ret;
universe@39: }
universe@39: 
universe@39: sstr_t sstrlower_a(UcxAllocator *allocator, sstr_t string) {
universe@39:     sstr_t ret = sstrdup_a(allocator, string);
universe@39:     for (size_t i = 0; i < ret.length ; i++) {
universe@39:         ret.ptr[i] = tolower(ret.ptr[i]);
universe@39:     }
universe@39:     return ret;
universe@39: }
universe@39: 
universe@39: sstr_t sstrupper(sstr_t string) {
universe@39:     sstr_t ret = sstrdup(string);
universe@39:     for (size_t i = 0; i < ret.length ; i++) {
universe@39:         ret.ptr[i] = toupper(ret.ptr[i]);
universe@39:     }
universe@39:     return ret;
universe@39: }
universe@39: 
universe@39: sstr_t sstrupper_a(UcxAllocator *allocator, sstr_t string) {
universe@39:     sstr_t ret = sstrdup_a(allocator, string);
universe@39:     for (size_t i = 0; i < ret.length ; i++) {
universe@39:         ret.ptr[i] = toupper(ret.ptr[i]);
universe@39:     }
universe@39:     return ret;
universe@39: }