--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/foosdk/sdk/pfc/string_base.cpp	Mon Jan 05 02:15:46 2026 -0500
@@ -0,0 +1,1403 @@
+#include "pfc-lite.h"
+#include "string_base.h"
+#include "pathUtils.h"
+#include "primitives.h"
+#include "other.h"
+#include <set>
+#include <math.h>
+#include "splitString2.h"
+
+namespace pfc {
+
+bool string_base::is_valid_utf8() const { return pfc::is_valid_utf8(get_ptr()); }
+t_size string_base::scan_filename() const { return pfc::scan_filename(get_ptr()); }
+t_size string_base::find_first(char p_char, t_size p_start) const { return pfc::string_find_first(get_ptr(), p_char, p_start); }
+t_size string_base::find_last(char p_char, t_size p_start) const { return pfc::string_find_last(get_ptr(), p_char, p_start); }
+t_size string_base::find_first(const char* p_string, t_size p_start) const { return pfc::string_find_first(get_ptr(), p_string, p_start); }
+t_size string_base::find_last(const char* p_string, t_size p_start) const { return pfc::string_find_last(get_ptr(), p_string, p_start); }
+bool string_base::has_prefix(const char* prefix) const { return string_has_prefix(get_ptr(), prefix); }
+bool string_base::has_prefix_i(const char* prefix) const { return string_has_prefix_i(get_ptr(), prefix); }
+bool string_base::has_suffix(const char* suffix) const { return string_has_suffix(get_ptr(), suffix); }
+bool string_base::has_suffix_i(const char* suffix) const { return string_has_suffix_i(get_ptr(), suffix); }
+bool string_base::equals(const char* other) const { return strcmp(*this, other) == 0; }
+
+void string_receiver::add_char(t_uint32 p_char)
+{
+	char temp[8];
+	t_size len = utf8_encode_char(p_char,temp);
+	if (len>0) add_string(temp,len);
+}
+
+void string_base::skip_trailing_chars( const char * lstCharsStr ) {
+    std::set<unsigned> lstChars;
+    for ( ;; ) {
+        unsigned c;
+        auto delta = utf8_decode_char( lstCharsStr, c );
+        if ( delta == 0 ) break;
+        lstCharsStr += delta;
+        lstChars.insert( c );
+    }
+    
+    const char * str = get_ptr();
+    t_size ptr,trunc = 0;
+    bool need_trunc = false;
+    for(ptr=0;str[ptr];)
+    {
+        unsigned c;
+        t_size delta = utf8_decode_char(str+ptr,c);
+        if (delta==0) break;
+        if ( lstChars.count( c ) > 0 )
+        {
+            if (!need_trunc) {
+                need_trunc = true;
+                trunc = ptr;
+            }
+        }
+        else
+        {
+            need_trunc = false;
+        }
+        ptr += delta;
+    }
+    if (need_trunc) truncate(trunc);
+}
+
+void string_base::skip_trailing_char(unsigned skip)
+{
+	const char * str = get_ptr();
+	t_size ptr,trunc = 0;
+	bool need_trunc = false;
+	for(ptr=0;str[ptr];)
+	{
+		unsigned c;
+		t_size delta = utf8_decode_char(str+ptr,c);
+		if (delta==0) break;
+		if (c==skip)
+		{
+			if (!need_trunc) {
+				need_trunc = true;
+				trunc = ptr;
+			}
+		}
+		else
+		{
+			need_trunc = false;
+		}
+		ptr += delta;
+	}
+	if (need_trunc) truncate(trunc);
+}
+
+string8 format_time(uint64_t p_seconds) {
+	string8 ret;
+	t_uint64 length = p_seconds;
+	unsigned weeks,days,hours,minutes,seconds;
+	
+	weeks = (unsigned)( ( length / (60*60*24*7) ) );
+	days = (unsigned)( ( length / (60*60*24) ) % 7 );
+	hours = (unsigned) ( ( length / (60 * 60) ) % 24);
+	minutes = (unsigned) ( ( length / (60 ) ) % 60 );
+	seconds = (unsigned) ( ( length ) % 60 );
+
+	if (weeks) {
+		ret << weeks << "wk ";
+	}
+	if (days || weeks) {
+		ret << days << "d ";
+	}
+	if (hours || days || weeks) {
+		ret << hours << ":" << format_uint(minutes,2) << ":" << format_uint(seconds,2);
+	} else {
+		ret << minutes << ":" << format_uint(seconds,2);
+	}
+	return ret;
+}
+
+bool is_path_separator(unsigned c)
+{
+#ifdef _WIN32
+	return c=='\\' || c=='/' || c=='|' || c==':';
+#else
+    return c == '/';
+#endif
+}
+
+bool is_path_bad_char(unsigned c)
+{
+#ifdef _WINDOWS
+	return c=='\\' || c=='/' || c=='|' || c==':' || c=='*' || c=='?' || c=='\"' || c=='>' || c=='<';
+#else
+	return c=='/' || c=='*' || c=='?';
+#endif
+}
+
+
+
+char * strdup_n(const char * src,t_size len)
+{
+	len = strlen_max(src,len);
+	char * ret = (char*)malloc(len+1);
+	if (ret)
+	{
+		memcpy(ret,src,len);
+		ret[len]=0;
+	}
+	return ret;
+}
+
+string8 string_filename(const char * fn)
+{
+	string8 ret;
+	fn += pfc::scan_filename(fn);
+	const char * ptr=fn,*dot=0;
+	while(*ptr && *ptr!='?')
+	{
+		if (*ptr=='.') dot=ptr;
+		ptr++;
+	}
+
+	if (dot && dot>fn) ret.set_string(fn,dot-fn);
+	else ret.set_string(fn);
+	return ret;
+}
+
+const char * extract_ext_v2( const char * filenameDotExt ) {
+    auto split = strrchr(filenameDotExt, '.');
+    return split ? split+1 : "";
+}
+
+string8 remove_ext_v2( const char * filenameDotExt ) {
+    auto split = strrchr(filenameDotExt, '.');
+    string8 ret;
+    if ( split ) ret.set_string_nc( filenameDotExt, split-filenameDotExt );
+    else ret = filenameDotExt;
+    return ret;
+}
+
+const char * filename_ext_v2( const char * fn, char slash ) {
+    if ( slash == 0 ) {
+		slash = pfc::io::path::getDefaultSeparator();
+	}
+    size_t split = pfc::string_find_last( fn, slash );
+    if ( split == SIZE_MAX ) return fn;
+	return fn + split + 1;
+}
+
+string8 string_filename_ext(const char * fn)
+{
+	string8 ret;
+	fn += pfc::scan_filename(fn);
+	const char * ptr = fn;
+	while(*ptr && *ptr!='?') ptr++;
+	ret.set_string(fn,ptr-fn);
+	return ret;
+}
+
+size_t find_extension_offset(const char * src) {
+	const char * start = src + pfc::scan_filename(src);
+	const char * end = start + strlen(start);
+	const char * ptr = end - 1;
+	while (ptr > start && *ptr != '.')
+	{
+		if (*ptr == '?') end = ptr;
+		ptr--;
+	}
+
+	if (ptr >= start && *ptr == '.')
+	{
+		return ptr - src;
+	}
+
+	return SIZE_MAX;
+}
+
+string8 string_extension(const char * src)
+{
+	string8 ret;
+	const char * start = src + pfc::scan_filename(src);
+	const char * end = start + strlen(start);
+	const char * ptr = end-1;
+	while(ptr>start && *ptr!='.')
+	{
+		if (*ptr=='?') end=ptr;
+		ptr--;
+	}
+
+	if (ptr>=start && *ptr=='.')
+	{
+		ptr++;
+		ret.set_string(ptr, end-ptr);
+	}
+	return ret;
+}
+
+
+bool has_path_bad_chars(const char * param)
+{
+	while(*param)
+	{
+		if (is_path_bad_char(*param)) return true;
+		param++;
+	}
+	return false;
+}
+
+void float_to_string(char * out,t_size out_max,double val,unsigned precision,bool b_sign) {
+	pfc::string_fixed_t<63> temp;
+	t_size outptr;
+
+	if (out_max == 0) return;
+	out_max--;//for null terminator
+	
+	outptr = 0;	
+
+	if (outptr == out_max) {out[outptr]=0;return;}
+
+	if (val<0) {out[outptr++] = '-'; val = -val;}
+	else if (val > 0 && b_sign) {out[outptr++] = '+';}
+
+	if (outptr == out_max) {out[outptr]=0;return;}
+
+	
+	{
+		double powval = pow((double)10.0,(double)precision);
+		temp << (t_int64)floor(val * powval + 0.5);
+		//_i64toa(blargh,temp,10);
+	}
+	
+	const t_size temp_len = temp.length();
+	if (temp_len <= precision)
+	{
+		out[outptr++] = '0';
+		if (outptr == out_max) {out[outptr]=0;return;}
+		out[outptr++] = '.';
+		if (outptr == out_max) {out[outptr]=0;return;}
+		t_size d;
+		for(d=precision-temp_len;d;d--)
+		{
+			out[outptr++] = '0';
+			if (outptr == out_max) {out[outptr]=0;return;}
+		}
+		for(d=0;d<temp_len;d++)
+		{
+			out[outptr++] = temp[d];
+			if (outptr == out_max) {out[outptr]=0;return;}
+		}
+	}
+	else
+	{
+		t_size d = temp_len;
+		const char * src = temp;
+		while(*src)
+		{
+			if (d-- == precision)
+			{
+				out[outptr++] = '.';
+				if (outptr == out_max) {out[outptr]=0;return;}
+			}
+			out[outptr++] = *(src++);
+			if (outptr == out_max) {out[outptr]=0;return;}
+		}
+	}
+	out[outptr] = 0;
+}
+
+
+    
+static double pfc_string_to_float_internal(const char * src) noexcept
+{
+	bool neg = false;
+	t_int64 val = 0;
+	int div = 0;
+	bool got_dot = false;
+
+	while(*src==' ') src++;
+
+	if (*src=='-') {neg = true;src++;}
+	else if (*src=='+') src++;
+	
+	while(*src)
+	{
+		if (*src>='0' && *src<='9')
+		{
+			int d = *src - '0';
+			val = val * 10 + d;
+			if (got_dot) div--;
+			src++;
+		}
+		else if (*src=='.' || *src==',')
+		{
+			if (got_dot) break;
+			got_dot = true;
+			src++;
+		}
+		else if (*src=='E' || *src=='e')
+		{
+			src++;
+			div += atoi(src);
+			break;
+		}
+		else break;
+	}
+	if (neg) val = -val;
+
+	if (val != 0) {
+		// SPECIAL FIX: ensure 0.2 and 0.200000 return the EXACT same float
+		while (val % 10 == 0) {
+			val /= 10; ++div;
+		}
+	}
+    return (double) val * exp_int(10, div);
+}
+
+double string_to_float(const char * src) noexcept {
+    return pfc_string_to_float_internal(src);
+}
+double string_to_float(const char * src,t_size max) noexcept {
+    char blargh[128];
+	if (max > 127) max = 127;
+	t_size walk;
+	for(walk = 0; walk < max && src[walk]; walk++) blargh[walk] = src[walk];
+	blargh[walk] = 0;
+	return pfc_string_to_float_internal(blargh);
+}
+
+
+
+void string_base::convert_to_lower_ascii(const char * src,char replace)
+{
+	reset();
+	PFC_ASSERT(replace>0);
+	while(*src)
+	{
+		unsigned c;
+		t_size delta = utf8_decode_char(src,c);
+		if (delta==0) {c = replace; delta = 1;}
+		else if (c>=0x80) c = replace;
+		add_byte((char)c);
+		src += delta;
+	}
+}
+
+void convert_to_lower_ascii(const char * src,t_size max,char * out,char replace)
+{
+	t_size ptr = 0;
+	PFC_ASSERT(replace>0);
+	while(ptr<max && src[ptr])
+	{
+		unsigned c;
+		t_size delta = utf8_decode_char(src+ptr,c,max-ptr);
+		if (delta==0) {c = replace; delta = 1;}
+		else if (c>=0x80) c = replace;
+		*(out++) = (char)c;
+		ptr += delta;
+	}
+	*out = 0;
+}
+
+t_size strstr_ex(const char * p_string,t_size p_string_len,const char * p_substring,t_size p_substring_len) noexcept
+{
+	p_string_len = strlen_max(p_string,p_string_len);
+	p_substring_len = strlen_max(p_substring,p_substring_len);
+	t_size index = 0;
+	while(index + p_substring_len <= p_string_len)
+	{
+		if (memcmp(p_string+index,p_substring,p_substring_len) == 0) return index;
+		t_size delta = utf8_char_len(p_string+index,p_string_len - index);
+		if (delta == 0) break;
+		index += delta;
+	}
+	return SIZE_MAX;
+}
+
+unsigned atoui_ex(const char * p_string,t_size p_string_len) noexcept
+{
+	unsigned ret = 0; t_size ptr = 0;
+	while(ptr<p_string_len)
+	{
+		char c = p_string[ptr];
+		if (! ( c >= '0' && c <= '9' ) ) break;
+		ret = ret * 10 + (unsigned)( c - '0' );
+		ptr++;
+	}
+	return ret;
+}
+
+int strcmp_nc(const char* p1, size_t n1, const char * p2, size_t n2) noexcept {
+	t_size idx = 0;
+	for(;;)
+	{
+		if (idx == n1 && idx == n2) return 0;
+		else if (idx == n1) return -1;//end of param1
+		else if (idx == n2) return 1;//end of param2
+
+		char c1 = p1[idx], c2 = p2[idx];
+		if (c1<c2) return -1;
+		else if (c1>c2) return 1;
+		
+		idx++;
+	}
+}
+
+int strcmp_ex(const char* p1,t_size n1,const char* p2,t_size n2) noexcept
+{
+	n1 = strlen_max(p1,n1); n2 = strlen_max(p2,n2);
+	return strcmp_nc(p1, n1, p2, n2);
+}
+
+t_uint64 atoui64_ex(const char * src,t_size len) noexcept {
+	len = strlen_max(src,len);
+	t_uint64 ret = 0, mul = 1;
+	t_size ptr = len;
+	t_size start = 0;
+//	start += skip_spacing(src+start,len-start);
+	
+	while(ptr>start)
+	{
+		char c = src[--ptr];
+		if (c>='0' && c<='9')
+		{
+			ret += (c-'0') * mul;
+			mul *= 10;
+		}
+		else
+		{
+			ret = 0;
+			mul = 1;
+		}
+	}
+	return ret;
+}
+
+
+t_int64 atoi64_ex(const char * src,t_size len) noexcept
+{
+	len = strlen_max(src,len);
+	t_int64 ret = 0, mul = 1;
+	t_size ptr = len;
+	t_size start = 0;
+	bool neg = false;
+//	start += skip_spacing(src+start,len-start);
+	if (start < len && src[start] == '-') {neg = true; start++;}
+//	start += skip_spacing(src+start,len-start);
+	
+	while(ptr>start)
+	{
+		char c = src[--ptr];
+		if (c>='0' && c<='9')
+		{
+			ret += (c-'0') * mul;
+			mul *= 10;
+		}
+		else
+		{
+			ret = 0;
+			mul = 1;
+		}
+	}
+	return neg ? -ret : ret;
+}
+
+
+string8 format_float(double p_val,unsigned p_width,unsigned p_prec)
+{
+	string8 m_buffer;
+	char temp[64];
+	float_to_string(temp,64,p_val,p_prec,false);
+	temp[63] = 0;
+	t_size len = strlen(temp);
+	if (len < p_width)
+		m_buffer.add_chars(' ',p_width-len);
+	m_buffer += temp;
+	return m_buffer;
+}
+
+char format_hex_char(unsigned p_val)
+{
+	PFC_ASSERT(p_val < 16);
+	return (p_val < 10) ? (char)p_val + '0' : (char)p_val - 10 + 'A';
+}
+
+format_int_t format_hex(t_uint64 p_val,unsigned p_width)
+{
+	format_int_t ret;
+
+	if (p_width > 16) p_width = 16;
+	else if (p_width == 0) p_width = 1;
+	char temp[16];
+	unsigned n;
+	for(n=0;n<16;n++)
+	{
+		temp[15-n] = format_hex_char((unsigned)(p_val & 0xF));
+		p_val >>= 4;
+	}
+
+	for(n=0;n<16 && temp[n] == '0';n++) {}
+	
+	if (n > 16 - p_width) n = 16 - p_width;
+	
+	char * out = ret.m_buffer;
+	for(;n<16;n++)
+		*(out++) = temp[n];
+	*out = 0;
+	return ret;
+}
+
+char format_hex_char_lowercase(unsigned p_val)
+{
+	PFC_ASSERT(p_val < 16);
+	return (p_val < 10) ? (char)p_val + '0' : (char)p_val - 10 + 'a';
+}
+
+format_int_t format_hex_lowercase(t_uint64 p_val,unsigned p_width)
+{
+	format_int_t ret;
+	if (p_width > 16) p_width = 16;
+	else if (p_width == 0) p_width = 1;
+	char temp[16];
+	unsigned n;
+	for(n=0;n<16;n++)
+	{
+		temp[15-n] = format_hex_char_lowercase((unsigned)(p_val & 0xF));
+		p_val >>= 4;
+	}
+
+	for(n=0;n<16 && temp[n] == '0';n++) {}
+	
+	if (n > 16 - p_width) n = 16 - p_width;
+	
+	char * out = ret.m_buffer;
+	for(;n<16;n++)
+		*(out++) = temp[n];
+	*out = 0;
+	return ret;
+}
+
+format_int_t format_uint(t_uint64 val,unsigned p_width,unsigned p_base)
+{
+	format_int_t ret;
+	
+	enum {max_width = PFC_TABSIZE(ret.m_buffer) - 1};
+
+	if (p_width > max_width) p_width = max_width;
+	else if (p_width == 0) p_width = 1;
+
+	char temp[max_width];
+	
+	unsigned n;
+	for(n=0;n<max_width;n++)
+	{
+		temp[max_width-1-n] = format_hex_char((unsigned)(val % p_base));
+		val /= p_base;
+	}
+
+	for(n=0;n<max_width && temp[n] == '0';n++) {}
+	
+	if (n > max_width - p_width) n = max_width - p_width;
+	
+	char * out = ret.m_buffer;
+
+	for(;n<max_width;n++)
+		*(out++) = temp[n];
+	*out = 0;
+	
+	return ret;
+}
+
+string8 format_fixedpoint(t_int64 p_val,unsigned p_point)
+{
+	string8 m_buffer;
+	unsigned div = 1;
+	for(unsigned n=0;n<p_point;n++) div *= 10;
+
+	if (p_val < 0) {m_buffer << "-";p_val = -p_val;}
+
+	
+	m_buffer << format_int(p_val / div) << "." << format_int(p_val % div, p_point);
+	return m_buffer;
+}
+
+
+format_int_t format_int(t_int64 p_val,unsigned p_width,unsigned p_base)
+{
+	format_int_t ret;
+	bool neg = false;
+	t_uint64 val;
+	if (p_val < 0) {neg = true; val = (t_uint64)(-p_val);}
+	else val = (t_uint64)p_val;
+	
+	enum {max_width = PFC_TABSIZE(ret.m_buffer) - 1};
+
+	if (p_width > max_width) p_width = max_width;
+	else if (p_width == 0) p_width = 1;
+
+	if (neg && p_width > 1) p_width --;
+	
+	char temp[max_width];
+	
+	unsigned n;
+	for(n=0;n<max_width;n++)
+	{
+		temp[max_width-1-n] = format_hex_char((unsigned)(val % p_base));
+		val /= p_base;
+	}
+
+	for(n=0;n<max_width && temp[n] == '0';n++) {}
+	
+	if (n > max_width - p_width) n = max_width - p_width;
+	
+	char * out = ret.m_buffer;
+
+	if (neg) *(out++) = '-';
+
+	for(;n<max_width;n++)
+		*(out++) = temp[n];
+	*out = 0;
+
+	return ret;
+}
+
+string8 format_hexdump_lowercase(const void * p_buffer,t_size p_bytes,const char * p_spacing)
+{
+	string8 m_formatter;
+	t_size n;
+	const t_uint8 * buffer = (const t_uint8*)p_buffer;
+	for(n=0;n<p_bytes;n++)
+	{
+		if (n > 0 && p_spacing != 0) m_formatter << p_spacing;
+		m_formatter << format_hex_lowercase(buffer[n],2);
+	}
+	return m_formatter;
+}
+
+string8 format_hexdump(const void * p_buffer,t_size p_bytes,const char * p_spacing)
+{
+	string8 m_formatter;
+	t_size n;
+	const t_uint8 * buffer = (const t_uint8*)p_buffer;
+	for(n=0;n<p_bytes;n++)
+	{
+		if (n > 0 && p_spacing != 0) m_formatter << p_spacing;
+		m_formatter << format_hex(buffer[n],2);
+	}
+	return m_formatter;
+}
+
+
+
+string8 string_replace_extension(const char * p_path,const char * p_ext)
+{
+	string8 m_data;
+	m_data = p_path;
+	t_size dot = m_data.find_last('.');
+	if (dot < m_data.scan_filename())
+	{//argh
+		m_data += ".";
+		m_data += p_ext;
+	}
+	else
+	{
+		m_data.truncate(dot+1);
+		m_data += p_ext;
+	}
+	return m_data;
+}
+
+string8 string_directory(const char * p_path)
+{
+	string8 ret;
+	t_size ptr = scan_filename(p_path);
+	if (ptr > 1) {
+		if (is_path_separator(p_path[ptr-1]) && !is_path_separator(p_path[ptr-2])) --ptr;
+	}
+	ret.set_string(p_path,ptr);
+	return ret;
+}
+
+t_size scan_filename(const char * ptr)
+{
+	t_size n;
+	t_size _used = strlen(ptr);
+	for(n=_used;n!=0;n--)
+	{
+		if (is_path_separator(ptr[n-1])) return n;
+	}
+	return 0;
+}
+
+
+
+t_size string_find_first(const char * p_string,char p_tofind,t_size p_start) {
+	for(t_size walk = p_start; p_string[walk]; ++walk) {
+		if (p_string[walk] == p_tofind) return walk;
+	}
+	return SIZE_MAX;
+}
+t_size string_find_last(const char * p_string,char p_tofind,t_size p_start) {
+	return string_find_last_ex(p_string,SIZE_MAX,&p_tofind,1,p_start);
+}
+t_size string_find_first(const char * p_string,const char * p_tofind,t_size p_start) {
+	return string_find_first_ex(p_string,SIZE_MAX,p_tofind,SIZE_MAX,p_start);
+}
+t_size string_find_last(const char * p_string,const char * p_tofind,t_size p_start) {
+	return string_find_last_ex(p_string,SIZE_MAX,p_tofind,SIZE_MAX,p_start);
+}
+
+t_size string_find_first_ex(const char * p_string,t_size p_string_length,char p_tofind,t_size p_start) {
+	for(t_size walk = p_start; walk < p_string_length && p_string[walk]; ++walk) {
+		if (p_string[walk] == p_tofind) return walk;
+	}
+	return SIZE_MAX;
+}
+t_size string_find_last_ex(const char * p_string,t_size p_string_length,char p_tofind,t_size p_start) {
+	return string_find_last_ex(p_string,p_string_length,&p_tofind,1,p_start);
+}
+t_size string_find_first_ex(const char * p_string,t_size p_string_length,const char * p_tofind,t_size p_tofind_length,t_size p_start) {
+	p_string_length = strlen_max(p_string,p_string_length); p_tofind_length = strlen_max(p_tofind,p_tofind_length);
+	if (p_string_length >= p_tofind_length) {
+		t_size max = p_string_length - p_tofind_length;
+		for(t_size walk = p_start; walk <= max; walk++) {
+			if (_strcmp_partial_ex(p_string+walk,p_string_length-walk,p_tofind,p_tofind_length) == 0) return walk;
+		}
+	}
+	return SIZE_MAX;
+}
+t_size string_find_last_ex(const char * p_string,t_size p_string_length,const char * p_tofind,t_size p_tofind_length,t_size p_start) {
+	p_string_length = strlen_max(p_string,p_string_length); p_tofind_length = strlen_max(p_tofind,p_tofind_length);
+	if (p_string_length >= p_tofind_length) {
+		t_size max = min_t<t_size>(p_string_length - p_tofind_length,p_start);
+		for(t_size walk = max; walk != (t_size)(-1); walk--) {
+			if (_strcmp_partial_ex(p_string+walk,p_string_length-walk,p_tofind,p_tofind_length) == 0) return walk;
+		}
+	}
+	return SIZE_MAX;
+}
+
+t_size string_find_first_nc(const char * p_string,t_size p_string_length,char c,t_size p_start) {
+	for(t_size walk = p_start; walk < p_string_length; walk++) {
+		if (p_string[walk] == c) return walk;
+	}
+	return SIZE_MAX;
+}
+
+t_size string_find_first_nc(const char * p_string,t_size p_string_length,const char * p_tofind,t_size p_tofind_length,t_size p_start) {
+	if (p_string_length >= p_tofind_length) {
+		t_size max = p_string_length - p_tofind_length;
+		for(t_size walk = p_start; walk <= max; walk++) {
+			if (memcmp(p_string+walk, p_tofind, p_tofind_length) == 0) return walk;
+		}
+	}
+	return SIZE_MAX;
+}
+
+
+bool string_is_numeric(const char * p_string,t_size p_length) noexcept {
+	bool retval = false;
+	for(t_size walk = 0; walk < p_length && p_string[walk] != 0; walk++) {
+		if (!char_is_numeric(p_string[walk])) {retval = false; break;}
+		retval = true;
+	}
+	return retval;
+}
+
+
+void string_base::end_with(char p_char) {
+	if (!ends_with(p_char)) add_byte(p_char);
+}
+bool string_base::ends_with(char c) const {
+	t_size length = get_length();
+	return length > 0 && get_ptr()[length-1] == c;
+}
+
+void string_base::end_with_slash() {
+	end_with( io::path::getDefaultSeparator() );
+}
+
+char string_base::last_char() const {
+    size_t l = this->length();
+    if (l == 0) return 0;
+    return this->get_ptr()[l-1];
+}
+void string_base::truncate_last_char() {
+    size_t l = this->length();
+    if (l > 0) this->truncate( l - 1 );
+}
+    
+void string_base::truncate_number_suffix() {
+    size_t l = this->length();
+    const char * const p = this->get_ptr();
+    while( l > 0 && char_is_numeric( p[l-1] ) ) --l;
+    truncate( l );
+}
+    
+bool is_multiline(const char * p_string,t_size p_len) {
+	for(t_size n = 0; n < p_len && p_string[n]; n++) {
+		switch(p_string[n]) {
+		case '\r':
+		case '\n':
+			return true;
+		}
+	}
+	return false;
+}
+
+static t_uint64 pow10_helper(unsigned p_extra) {
+	t_uint64 ret = 1;
+	for(unsigned n = 0; n < p_extra; n++ ) ret *= 10;
+	return ret;
+}
+
+static uint64_t safeMulAdd(uint64_t prev, unsigned scale, uint64_t add) {
+	if (add >= scale || scale == 0) throw pfc::exception_invalid_params();
+	uint64_t v = prev * scale + add;
+	if (v / scale != prev) throw pfc::exception_invalid_params();
+	return v;
+}
+
+static size_t parseNumber(const char * in, uint64_t & outNumber) {
+	size_t walk = 0;
+	uint64_t total = 0;
+	for (;;) {
+		char c = in[walk];
+		if (!pfc::char_is_numeric(c)) break;
+		unsigned v = (unsigned)(c - '0');
+		uint64_t newVal = total * 10 + v;
+		if (newVal / 10 != total) throw pfc::exception_overflow();
+		total = newVal;
+		++walk;
+	}
+	outNumber = total;
+	return walk;
+}
+
+double parse_timecode(const char * in) {
+	char separator = 0;
+	uint64_t seconds = 0;
+	unsigned colons = 0;
+	for (;;) {
+		uint64_t number = 0;
+		size_t digits = parseNumber(in, number);
+		if (digits == 0) throw pfc::exception_invalid_params();
+		in += digits;
+		char nextSeparator = *in;
+		switch (separator) { // *previous* separator
+		case '.':
+			if (nextSeparator != 0) throw pfc::exception_bug_check();
+			return (double)seconds + (double)pfc::exp_int(10, -(int)digits) * number;
+		case 0: // is first number in the string
+			seconds = number;
+			break;
+		case ':':
+			if (colons == 2) throw pfc::exception_invalid_params();
+			++colons;
+			seconds = safeMulAdd(seconds, 60, number);
+			break;
+		}
+
+		if (nextSeparator == 0) {
+			// end of string
+			return (double)seconds;
+		}
+
+		++in;
+		separator = nextSeparator;
+	}
+}
+
+string8 format_time_ex(double p_seconds,unsigned p_extra) {
+	string8 ret;
+	if (p_seconds < 0) {ret << "-"; p_seconds = -p_seconds;}
+	t_uint64 pow10 = pow10_helper(p_extra);
+	t_uint64 ticks = pfc::rint64(pow10 * p_seconds);
+
+	ret << pfc::format_time(ticks / pow10);
+	if (p_extra>0) {
+		ret << "." << pfc::format_uint(ticks % pow10, p_extra);
+	}
+	return ret;
+}
+
+void stringToUpperHere(string_base& p_out, const char* p_source, t_size p_sourceLen) {
+	p_out.clear();
+	stringToUpperAppend(p_out, p_source, p_sourceLen);
+}
+void stringToLowerHere(string_base& p_out, const char* p_source, t_size p_sourceLen) {
+	p_out.clear();
+	stringToLowerAppend(p_out, p_source, p_sourceLen);
+}
+
+void stringToUpperAppend(string_base & out, const char * src, t_size len) {
+	while(len && *src) {
+		unsigned c; t_size d;
+		d = utf8_decode_char(src,c,len);
+		if (d==0 || d>len) break;
+		out.add_char(charUpper(c));
+		src+=d;
+		len-=d;
+	}
+}
+void stringToLowerAppend(string_base & out, const char * src, t_size len) {
+	while(len && *src) {
+		unsigned c; t_size d;
+		d = utf8_decode_char(src,c,len);
+		if (d==0 || d>len) break;
+		out.add_char(charLower(c));
+		src+=d;
+		len-=d;
+	}
+}
+
+string8 format_file_size_short(uint64_t size, uint64_t * outUsedScale) {
+	string8 ret;
+	t_uint64 scale = 1;
+	const char * unit = "B";
+	const char * const unitTable[] = {"B","KB","MB","GB","TB"};
+	for(t_size walk = 1; walk < PFC_TABSIZE(unitTable); ++walk) {
+		t_uint64 next = scale * 1024;
+		if (size < next) break;
+		scale = next; unit = unitTable[walk];
+	}
+	ret << ( size  / scale );
+
+	if (scale > 1 && ret.length() < 3) {
+		t_size digits = 3 - ret.length();
+		const t_uint64 mask = pow_int(10,digits);
+		t_uint64 remaining = ( (size * mask / scale) % mask );
+		while(digits > 0 && (remaining % 10) == 0) {
+			remaining /= 10; --digits;
+		}
+		if (digits > 0) {
+			ret << "." << format_uint(remaining, (t_uint32)digits);
+		}
+	}
+	ret << " " << unit;
+	if (outUsedScale != nullptr) *outUsedScale = scale;
+	return ret;
+}
+
+pfc::string8 format_index(size_t idx) {
+	return idx == SIZE_MAX ? "<n/a>" : pfc::format_uint(idx);
+}
+
+pfc::string8 format_permutation(const size_t* arg, size_t n) {
+	pfc::string_formatter ret;
+	for( size_t walk = 0; walk < n; ++ walk ) {
+		if (arg[walk] != walk) {
+			if ( !ret.is_empty() ) ret << ", ";
+			ret << arg[walk] << "->" << walk;
+		}
+	}
+	return ret;
+}
+pfc::string8 format_mask(pfc::bit_array const& mask, size_t n) {
+	pfc::string_formatter ret;
+	mask.for_each(true, 0, n, [&] (size_t idx) {
+		if (!ret.is_empty() ) ret << ", ";
+		ret << idx;
+	});
+	return ret;
+}
+
+bool string_base::truncate_eol(t_size start)
+{
+	const char * ptr = get_ptr() + start;
+	for(t_size n=start;*ptr;n++)
+	{
+		if (*ptr==10 || *ptr==13)
+		{
+			truncate(n);
+			return true;
+		}
+		ptr++;
+	}
+	return false;
+}
+
+bool string_base::fix_eol(const char * append,t_size start)
+{
+	const bool rv = truncate_eol(start);
+	if (rv) add_string(append);
+	return rv;
+}
+
+bool string_base::limit_length(t_size length_in_chars,const char * append)
+{
+	bool rv = false;
+	const char * base = get_ptr(), * ptr = base;
+	while(length_in_chars && utf8_advance(ptr)) length_in_chars--;
+	if (length_in_chars==0)
+	{
+		truncate(ptr-base);
+		add_string(append);
+		rv = true;
+	}
+	return rv;
+}
+
+void string_base::truncate_to_parent_path() {
+	size_t at = scan_filename();
+#ifdef _WIN32
+	while(at > 0 && (*this)[at-1] == '\\') --at;
+	if (at > 0 && (*this)[at-1] == ':' && (*this)[at] == '\\') ++at;
+#else
+	// Strip trailing /
+	while(at > 0 && (*this)[at-1] == '/') --at;
+
+	// Hit empty? Bring root / back to life
+	if (at == 0 && (*this)[0] == '/') ++at;
+
+	// Deal with proto://
+	if (at > 0 && (*this)[at-1] == ':') {
+		while((*this)[at] == '/') ++at;
+	}
+#endif
+	this->truncate( at );
+}
+
+size_t string_base::replace_string(const char * replace, const char * replaceWith, t_size start) {
+	string_formatter temp;
+	size_t ret = replace_string_ex(temp, replace, replaceWith, start);
+	if ( ret > 0 ) * this = temp;
+	return ret;
+}
+size_t string_base::replace_string_ex (string_base & temp, const char * replace, const char * replaceWith, t_size start) const {
+    size_t srcDone = 0, walk = start;
+    size_t occurances = 0;
+    const char * const source = this->get_ptr();
+    bool clear = false;
+    const size_t replaceLen = strlen( replace );
+    for(;;) {
+        const char * ptr = strstr( source + walk, replace );
+        if (ptr == NULL) {
+            // end
+            if (srcDone == 0) {
+                return 0; // string not altered
+            }
+            temp.add_string( source + srcDone );
+            break;
+        }
+        ++occurances;
+        walk = ptr - source;
+		if (! clear ) {
+			temp.reset();
+			clear = true;
+		}
+        temp.add_string( source + srcDone, walk - srcDone );
+        temp.add_string( replaceWith );
+        walk += replaceLen;
+        srcDone = walk;
+    }
+    return occurances;
+}
+
+void urlEncodeAppendRaw(pfc::string_base & out, const char * in, t_size inSize) {
+	for(t_size walk = 0; walk < inSize; ++walk) {
+		const char c = in[walk];
+		if (c == ' ') out.add_byte('+');
+		else if (pfc::char_is_ascii_alphanumeric(c) || c == '_') out.add_byte(c);
+		else out << "%" << pfc::format_hex((t_uint8)c, 2);
+	}
+}
+void urlEncodeAppend(pfc::string_base & out, const char * in) {
+	for(;;) {
+		const char c = *(in++);
+		if (c == 0) break;
+		else if (c == ' ') out.add_byte('+');
+		else if (pfc::char_is_ascii_alphanumeric(c) || c == '_') out.add_byte(c);
+		else out << "%" << pfc::format_hex((t_uint8)c, 2);
+	}
+}
+void urlEncode(pfc::string_base & out, const char * in) {
+	out.reset(); urlEncodeAppend(out, in);
+}
+
+unsigned char_to_dec(char c) {
+	PFC_ASSERT(c != 0);
+	if (c >= '0' && c <= '9') return (unsigned)(c - '0');
+	else throw exception_invalid_params();
+}
+
+unsigned char_to_hex(char c) {
+	if (c >= '0' && c <= '9') return (unsigned)(c - '0');
+	else if (c >= 'a' && c <= 'f') return (unsigned)(c - 'a' + 10);
+	else if (c >= 'A' && c <= 'F') return (unsigned)(c - 'A' + 10);
+	else throw exception_invalid_params();
+}
+
+
+static constexpr t_uint8 ascii_tolower_table[128] = {0x00,0x01,0x02,0x03,0x04,0x05,0x06,0x07,0x08,0x09,0x0A,0x0B,0x0C,0x0D,0x0E,0x0F,0x10,0x11,0x12,0x13,0x14,0x15,0x16,0x17,0x18,0x19,0x1A,0x1B,0x1C,0x1D,0x1E,0x1F,0x20,0x21,0x22,0x23,0x24,0x25,0x26,0x27,0x28,0x29,0x2A,0x2B,0x2C,0x2D,0x2E,0x2F,0x30,0x31,0x32,0x33,0x34,0x35,0x36,0x37,0x38,0x39,0x3A,0x3B,0x3C,0x3D,0x3E,0x3F,0x40,0x61,0x62,0x63,0x64,0x65,0x66,0x67,0x68,0x69,0x6A,0x6B,0x6C,0x6D,0x6E,0x6F,0x70,0x71,0x72,0x73,0x74,0x75,0x76,0x77,0x78,0x79,0x7A,0x5B,0x5C,0x5D,0x5E,0x5F,0x60,0x61,0x62,0x63,0x64,0x65,0x66,0x67,0x68,0x69,0x6A,0x6B,0x6C,0x6D,0x6E,0x6F,0x70,0x71,0x72,0x73,0x74,0x75,0x76,0x77,0x78,0x79,0x7A,0x7B,0x7C,0x7D,0x7E,0x7F};
+
+uint32_t charLower(uint32_t param)
+{
+	if (param<128) {
+		return ascii_tolower_table[param];
+	}
+#ifdef PFC_WINDOWS_DESKTOP_APP
+	else if (param<0x10000) {
+		return (uint32_t)(size_t)CharLowerW((WCHAR*)(size_t)param);
+	}
+#endif
+	else return param;
+}
+
+uint32_t charUpper(uint32_t param)
+{
+	if (param<128) {
+		if (param>='a' && param<='z') param -= (uint32_t)( 'a' - 'A' );
+		return param;
+	}
+#ifdef PFC_WINDOWS_DESKTOP_APP
+	else if (param<0x10000) {
+		return (uint32_t)(size_t)CharUpperW((WCHAR*)(size_t)param);
+	}
+#endif
+	else return param;
+}
+
+
+bool stringEqualsI_ascii(const char * p1,const char * p2) noexcept {
+	for(;;)
+	{
+		char c1 = *p1;
+		char c2 = *p2;
+		if (c1 > 0 && c2 > 0) {
+			if (ascii_tolower_table[ (unsigned) c1 ] != ascii_tolower_table[ (unsigned) c2 ]) return false;
+		} else {
+			if (c1 == 0 && c2 == 0) return true;
+			if (c1 == 0 || c2 == 0) return false;
+			if (c1 != c2) return false;
+		}
+		++p1; ++p2;
+	}
+}
+
+bool stringEqualsI_utf8(const char * p1,const char * p2) noexcept
+{
+	for(;;)
+	{
+		char c1 = *p1;
+		char c2 = *p2;
+		if (c1 > 0 && c2 > 0) {
+			if (ascii_tolower_table[ (unsigned) c1 ] != ascii_tolower_table[ (unsigned) c2 ]) return false;
+			++p1; ++p2;
+		} else {
+			if (c1 == 0 && c2 == 0) return true;
+			if (c1 == 0 || c2 == 0) return false;
+			unsigned w1,w2; t_size d1,d2;
+			d1 = utf8_decode_char(p1,w1);
+			d2 = utf8_decode_char(p2,w2);
+			if (d1 == 0 || d2 == 0) return false; // bad UTF-8, bail
+			if (w1 != w2) {
+				if (charLower(w1) != charLower(w2)) return false;
+			}
+			p1 += d1;
+			p2 += d2;
+		}
+	}
+}
+
+char ascii_tolower_lookup(char c) {
+	PFC_ASSERT( c >= 0);
+	return (char)ascii_tolower_table[ (unsigned) c ];
+}
+
+void string_base::fix_dir_separator(char c) {
+#ifdef _WIN32
+    end_with(c);
+#else
+    end_with_slash();
+#endif
+}
+    
+
+    bool string_has_prefix( const char * string, const char * prefix ) {
+        for(size_t w = 0; ; ++w ) {
+            char c = prefix[w];
+            if (c == 0) return true;
+            if (string[w] != c) return false;
+        }
+    }
+	const char* string_skip_prefix_i(const char* string, const char* prefix) {
+		const char* p1 = string; const char* p2 = prefix;
+		for (;;) {
+			unsigned w1, w2; size_t d1, d2;
+			d1 = utf8_decode_char(p1, w1);
+			d2 = utf8_decode_char(p2, w2);
+			if (d2 == 0) return p1;
+			if (d1 == 0) return nullptr;
+			if (w1 != w2) {
+				if (charLower(w1) != charLower(w2)) return nullptr;
+			}
+			p1 += d1; p2 += d2;
+		}
+	}
+    bool string_has_prefix_i( const char * string, const char * prefix ) {
+		return string_skip_prefix_i(string, prefix) != nullptr;
+    }
+    bool string_has_suffix( const char * string, const char * suffix ) {
+        size_t len = strlen( string );
+        size_t suffixLen = strlen( suffix );
+        if (suffixLen > len) return false;
+        size_t base = len - suffixLen;
+        return memcmp( string + base, suffix, suffixLen * sizeof(char)) == 0;
+    }
+    bool string_has_suffix_i( const char * string, const char * suffix ) {
+        for(;;) {
+            if (*string == 0) return false;
+            if (stringEqualsI_utf8( string, suffix )) return true;
+            if (!utf8_advance(string)) return false;
+        }
+    }
+
+	char * strDup(const char * src) {
+#ifdef _MSC_VER
+		return _strdup(src);
+#else
+		return strdup(src);
+#endif
+	}
+
+
+	string_part_ref string_part_ref::make(const char * ptr, t_size len) {
+		string_part_ref val = {ptr, len}; return val;
+	}
+
+	string_part_ref string_part_ref::substring(t_size base) const {
+		PFC_ASSERT( base <= m_len );
+		return make(m_ptr + base, m_len - base);
+	}
+	string_part_ref string_part_ref::substring(t_size base, t_size len) const {
+		PFC_ASSERT( base <= m_len && base + len <= m_len );
+		return make(m_ptr + base, len);
+	}
+
+	string_part_ref string_part_ref::make( const char * str ) {return make( str, strlen(str) ); }
+
+	bool string_part_ref::equals( string_part_ref other ) const {
+		if ( other.m_len != this->m_len ) return false;
+		return memcmp( other.m_ptr, this->m_ptr, m_len ) == 0;
+	}
+	bool string_part_ref::equals( const char * str ) const {
+		return equals(make(str) );
+	}
+
+	string8 lineEndingsToWin(const char * str) {
+		string8 ret;
+		const char * walk = str;
+		for( ;; ) {
+			const char * eol = strchr( walk, '\n' );
+			if ( eol == nullptr ) {
+				ret += walk; break;
+			}
+			const char * next = eol + 1;
+			if ( eol > walk ) {
+				if (eol[-1] == '\r') --eol;
+				if ( eol > walk ) ret.add_string_nc(walk, eol-walk);
+			}
+			ret.add_string_nc("\r\n",2);
+			walk = next;
+		}
+		return ret;
+	}
+
+
+	string8 format_char(char c) {
+		string8 ret; ret.add_byte(c); return ret;
+	}
+
+    string8 format_ptr( const void * ptr ) {
+        string8 temp;
+        temp << "0x";
+        temp << format_hex_lowercase( (size_t) ptr, sizeof(ptr) * 2 );
+        return temp;
+    }
+
+
+	string8 format_pad_left(t_size p_chars, t_uint32 p_padding, const char * p_string, t_size p_string_length) {
+		string8 m_buffer;
+		t_size source_len = 0, source_walk = 0;
+
+		while (source_walk < p_string_length && source_len < p_chars) {
+			unsigned dummy;
+			t_size delta = pfc::utf8_decode_char(p_string + source_walk, dummy, p_string_length - source_walk);
+			if (delta == 0) break;
+			source_len++;
+			source_walk += delta;
+		}
+
+		m_buffer.add_string(p_string, source_walk);
+		m_buffer.add_chars(p_padding, p_chars - source_len);
+		return m_buffer;
+	}
+
+	string8 format_pad_right(t_size p_chars, t_uint32 p_padding, const char * p_string, t_size p_string_length) {
+		string8 m_buffer;
+		t_size source_len = 0, source_walk = 0;
+
+		while (source_walk < p_string_length && source_len < p_chars) {
+			unsigned dummy;
+			t_size delta = pfc::utf8_decode_char(p_string + source_walk, dummy, p_string_length - source_walk);
+			if (delta == 0) break;
+			source_len++;
+			source_walk += delta;
+		}
+
+		m_buffer.add_chars(p_padding, p_chars - source_len);
+		m_buffer.add_string(p_string, source_walk);
+		return m_buffer;
+	}
+
+	string8 stringToUpper(const char * str, size_t len) {
+		string8 ret;
+		stringToUpperAppend(ret, str, len);
+		return ret;
+	}
+	string8 stringToLower(const char * str, size_t len) {
+		string8 ret;
+		stringToLowerAppend(ret, str, len);
+		return ret;
+	}
+
+	pfc::string8 prefixLines(const char* str, const char* prefix, const char * setEOL) {
+		const auto temp = pfc::splitStringByLines2(str);
+		pfc::string8 ret; ret.prealloc(1024);
+		for (auto& line : temp) {
+			if ( line.length() > 0 ) ret << prefix << line << setEOL;
+		}
+		return ret;
+	}
+
+	pfc::string8 recover_invalid_utf8(const char* in, const char* subst) {
+		pfc::string8 ret; ret.prealloc(strlen(in));
+		for (;;) {
+			char c = *in;
+			if (c == 0) break;
+			if (c < ' ') {
+				ret += subst;
+			} else {
+				ret.add_byte(c);
+			}
+			++in;
+		}
+		return ret;
+	}
+	static bool is_spacing(char c) {
+		switch (c) {
+		case ' ': case '\n': case '\r': case '\t': return true;
+		default: return false;
+		}
+	}
+	pfc::string8 string_trim_spacing(const char* in) {
+		const char* temp_ptr = in;
+		while (is_spacing(*temp_ptr)) temp_ptr++;
+		const char* temp_start = temp_ptr;
+		const char* temp_end = temp_ptr;
+		while (*temp_ptr)
+		{
+			if (!is_spacing(*temp_ptr)) temp_end = temp_ptr + 1;
+			temp_ptr++;
+		}
+
+		return string_part_ref { temp_start, (size_t)(temp_end - temp_start) };
+	}
+} //namespace pfc