/*
* 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;
}
sstr_t* result;
ssize_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++) {
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;
}