From 7c24e9a9b02b04dcaf9507acb94091ea70a2c02d Mon Sep 17 00:00:00 2001
From: Xavi Del Campo <xavi.dcr@tutanota.com>
Date: Fri, 31 Jan 2020 10:32:23 +0100
Subject: Imported pristine psxsdk-20190410 from official repo

---
 libpsx/src/libc/string.c | 706 +++++++++++++++++++++++++++++++++++++++++++++++
 1 file changed, 706 insertions(+)
 create mode 100644 libpsx/src/libc/string.c

(limited to 'libpsx/src/libc/string.c')

diff --git a/libpsx/src/libc/string.c b/libpsx/src/libc/string.c
new file mode 100644
index 0000000..ea59b91
--- /dev/null
+++ b/libpsx/src/libc/string.c
@@ -0,0 +1,706 @@
+/*
+ * string.c
+ * 
+ * Part of the PSXSDK C library
+ */
+
+#include <stdio.h>
+#include <string.h>
+#include <stdlib.h>
+#include <unistd.h>
+#include <ctype.h>
+
+void *memcpy(void *dst, const void *src, size_t len)
+{
+	void *dst2 = dst;
+	
+	while(len--)
+		*(((unsigned char*)dst++)) = *(((unsigned char*)src++));
+		
+	return dst2;
+}
+
+void *memccpy(void *dst, const void *src, int c, size_t len)
+{	
+	unsigned char c2;
+	
+	while(len--)
+	{
+		*(((unsigned char*)dst++)) = ( c2 = *(((unsigned char*)src++)) );
+		
+		if(c2 == c)
+			return (void*)src;
+	}
+	
+	return NULL;
+}
+
+void *memset(void *dst , char c , size_t n)
+{
+	unsigned char *dstc = (unsigned char*)dst;
+	int x;
+
+	for(x = 0; x < n; x++)
+		dstc[x] = c;
+	
+	return dst;
+}
+
+int memcmp(const void *b1, const void *b2, size_t n)
+{
+	int x;
+	unsigned char *bp1 = (unsigned char*)b1;
+	unsigned char *bp2 = (unsigned char*)b2;
+	
+	for(x = 0;  x < n; x++)
+		if(bp1[x] != bp2[x])
+			return (bp1[x] - bp2[x]);
+		
+	return 0;
+}
+
+void *memmove(void *dst, const void *src, size_t len)
+{
+	void *dst2 = dst;
+	
+	dst+=len-1;
+	src+=len-1;
+	
+	while(len--)
+		*(((unsigned char*)dst--)) = *(((unsigned char*)src--));
+		
+	return dst2;
+}
+
+void *memchr(void *s , int c , size_t n)
+{
+	while(n--)
+	{
+		if(*((unsigned char*)s) == (unsigned char)c)
+			return s;
+		
+		s++;
+	}
+	
+	return NULL;
+}
+
+char *strncpy(char *dst, const char *src, size_t len)
+{
+	char *odst=dst;
+
+	while(*src && len)
+	{
+		*(dst++) = *(src++);
+		len--;
+	}
+	
+	if(len)*dst = 0;
+	
+	return odst;
+}
+
+char *strcpy(char *dst, const char *src)
+{
+	char *odst = dst;
+
+	while((*(dst++) = *(src++)));
+	return odst;
+}
+
+int strlen(const char *str)
+{
+	int i = 0;
+	while(*(str++))i++;
+	return i;
+}
+
+char *strchr(const char *s, int c)
+{
+	int x;
+	int l = strlen(s);
+
+	for(x = 0; x <= l; x++)
+		if(s[x] == c) return (char*)&s[x];
+
+	return NULL;
+}
+
+char *strrchr(const char *s, int c)
+{
+	int x;
+	int l = strlen(s);
+
+	for(x = l; x>=0; x--)
+		if(s[x] == c) return (char*)&s[x];
+
+	return NULL;
+}
+
+char *strpbrk(const char *s, const char *charset)
+{
+	int x,y;
+
+	for(x = 0; s[x] != 0; x++)
+		for(y = 0; charset[y] != 0; y++)
+			if(s[x] == charset[y]) return (char*)&s[x];
+
+	return NULL;
+}
+
+char *strstr(const char *big, const char *little)
+{
+	int ls = strlen(little);
+	int bs = strlen(big);
+	int x;
+
+	if(ls == 0)
+		return (char*)big;
+	
+	if(ls > bs)
+		return NULL;
+
+	for(x = 0; x <= bs-ls; x++)
+		if(memcmp(little, &big[x], ls) == 0)
+			return (char*)&big[x];
+
+	return NULL;
+}
+
+int strcmp(const char *s1, const char *s2)
+{
+	while(*s1 && *s2 && (*s1 == *s2))
+	{
+		s1++;
+		s2++;
+	}
+
+	return *s1-*s2;
+}
+
+int strncmp(const char *s1, const char *s2, size_t len)
+{
+	int p = 0;
+
+	while(*s1 && *s2 && (*s1 == *s2) && p<len)
+	{
+		p++;
+
+		if(p<len)
+		{
+			s1++;
+			s2++;
+		}
+	}
+
+	return *s1-*s2;
+}
+
+int strcoll(const char *s1, const char *s2)
+{
+	return strcmp(s1, s2);
+}
+
+char *strdup(const char *str)
+{
+	char *ns = (void*)malloc(strlen(str) + 1);
+
+	if(ns == NULL)
+		return NULL;
+	
+	strcpy(ns, str);
+	return ns;
+}
+
+char *strndup(const char *str, size_t len)
+{
+	int n=strlen(str);
+	char *ns = (void*)malloc((n+1)>len?len:(n+1));
+
+	if(ns == NULL)
+		return NULL;
+	
+	strncpy(ns, str, (n+1)>len?len:(n+1));
+	return ns;
+}
+	
+long long strtoll(const char *nptr, char **endptr, int base)
+{
+	int r = 0;
+	int t = 0;
+	int n = 0;
+	
+	while(*nptr && isspace(*nptr))
+		nptr++;
+	
+	if(*nptr == '-')
+	{
+		nptr++;
+		n = 1;
+	}
+
+	if(base == 0)
+	{
+		if(*nptr == '0')
+			base = 8;
+		else
+			base = 10;
+	}
+
+	if(!(base >= 2 && base <= 36))
+		return 0;
+
+	if(base == 16 && *nptr == '0')
+	{
+		if(*(nptr+1) == 'x' || *(nptr+1) == 'X')
+			nptr+=2;
+	}
+
+	while(*nptr)
+	{
+		switch(*nptr)
+		{
+			case '0'...'9':
+				t = *nptr - '0';
+			break;
+			case 'a' ... 'z':
+				t = (*nptr - 'a') + 10;
+			break;
+			case 'A' ... 'Z':
+				t = (*nptr - 'A') + 10;
+			break;
+			default:
+				t = 1000;
+			break;
+		}
+
+		if(t>=base)
+			break;
+
+		r*=base;
+		r+=t;
+		nptr++;
+	}
+
+	if(endptr)*endptr = (char*)nptr;
+	return n?-r:r;
+}
+
+long strtol(const char *nptr, char **endptr, int base)
+{
+	return (long)strtoll(nptr, endptr, base);
+}
+
+double strtod(const char *nptr, char **endptr)
+{
+	char strbuf[64];
+	int x = 0;
+	int y;
+	double i=0, d=0;
+	int s=1;
+
+	if(*nptr == '-')
+	{
+		nptr++;
+		s=-1;
+	}
+
+	while(*nptr >= '0' && *nptr <= '9' && x < 18)
+		strbuf[x++] = *(nptr++);
+
+	strbuf[x] = 0;
+
+	i = (double)strtoll(strbuf, NULL, 10);
+
+	if(*nptr == '.')
+	{
+		nptr++;
+		x = 0;
+
+		while(*nptr >= '0' && *nptr <= '9' && x < 7)
+			strbuf[x++] = *(nptr++);
+
+		strbuf[x] = 0;
+		
+		if(endptr != NULL) *endptr = (char*)nptr;
+
+		y=1;
+
+		for(x=0;strbuf[x]!=0;x++)
+			y*=10;
+
+		d = (double)strtoll(strbuf, NULL, 10);
+		d /= y;
+	}
+	else
+	{
+		if(endptr != NULL)
+			*endptr = (char*)nptr;
+	}
+	
+	return (i + d)*s;
+}
+
+long double strtold(const char *nptr, char **endptr)
+{
+	return (long double)strtod(nptr, endptr);
+}
+
+float strtof(const char *nptr, char **endptr)
+{
+	return (float)strtod(nptr, endptr);
+}
+
+char *strcat(char *s, const char *append)
+{
+	strcpy(&s[strlen(s)], append);
+
+	return s;
+}
+
+char *strncat(char *s, const char *append, size_t count)
+{
+	strncpy(&s[strlen(s)], append, count);
+
+	return s;
+}
+
+int strcasecmp(const char *s1, const char *s2)
+{
+	while(tolower(*s1) && tolower(*s2) && (tolower(*s1) == tolower(*s2)))
+	{
+		s1++;
+		s2++;
+	}
+
+	return tolower(*s1)-tolower(*s2);
+}
+
+int strncasecmp(const char *s1, const char *s2, size_t len)
+{
+	int p = 0;
+
+	while(tolower(*s1) && tolower(*s2) && (tolower(*s1) == tolower(*s2)) && p<len)
+	{
+		p++;
+
+		if(p<len)
+		{
+			s1++;
+			s2++;
+		}
+	}
+
+	return tolower(*s1)-tolower(*s2);
+}
+
+int stricmp(const char *s1, const char *s2)
+{
+	return strcasecmp(s1,s2);
+}
+
+int strnicmp(const char *s1, const char *s2, size_t len)
+{
+	return strncasecmp(s1, s2, len);
+}
+
+//static char *strtok_string;
+
+char *strsep(char **stringp, const char *delim)
+{
+	//int x,y;
+	char *old = *stringp;
+	const char *s;
+	int ok = 0;
+		
+	while(**stringp && !ok)
+	{
+		s = delim;
+		
+		while(*delim)
+		{
+			if(**stringp == *delim)
+			{
+				**stringp = 0;
+				ok = 1;
+				break;
+			}
+			
+			delim++;
+		}
+		
+		delim = s;
+		
+		*stringp+=1;
+	}
+	
+	if(!ok)*stringp = NULL;
+	
+	return old;
+}
+
+char *strtok(char *str, const char *sep)
+{
+	int x, y;
+	static char *strtok_string;
+	static int strtok_len;
+	static int strtok_pos;
+	//int strtok_oldpos = 0;
+	
+	if(str != NULL)
+	{
+		strtok_string = str;
+		strtok_len = strlen(str);
+		
+		for(x = 0; x < strtok_len; x++)
+		{
+			for(y = 0; sep[y] != 0; y++)
+			{
+				if(strtok_string[x] == sep[y])
+				{
+					strtok_string[x] = 0;
+					break;
+				}
+			}
+		}
+		
+		strtok_pos = 0;
+		
+		while(strtok_pos < strtok_len)
+		{
+			if(strtok_string[strtok_pos])
+				return &strtok_string[strtok_pos];
+		
+			strtok_pos++;
+		}
+	}
+	
+	while(strtok_pos < strtok_len)
+	{
+		if(!strtok_string[strtok_pos])
+		{
+			strtok_pos++;
+			break;
+		}
+		
+		strtok_pos++;
+	}
+	
+	while(strtok_pos < strtok_len)
+	{
+
+		if(strtok_string[strtok_pos])
+			return &strtok_string[strtok_pos];
+		
+		strtok_pos++;
+	}
+		
+	return NULL;
+}
+
+int strspn(const char *s, const char *charset)
+{
+	int x, y;
+	int appears;
+	
+	for(x = 0; s[x] != 0; x++)
+	{		
+		appears = 0;
+		
+		for(y = 0; charset[y] != 0; y++)
+		{
+			if(s[x] == charset[y])
+			{
+				appears = 1;
+				break;
+			}
+		}
+		
+		if(!appears)break;
+	}
+	
+	return x;
+}
+
+int strcspn(const char *s, const char *charset)
+{
+	int x, y;
+	int appears;
+	
+	for(x = 0; s[x] != 0; x++)
+	{		
+		appears = 0;
+		
+		for(y = 0; charset[y] != 0; y++)
+		{
+			if(s[x] == charset[y])
+			{
+				appears = 1;
+				break;
+			}
+		}
+		
+		if(appears)break;
+	}
+	
+	return x;
+}
+
+char *strlwr(char *string)
+{
+	char *old = string;
+	
+	while(*string)
+	{
+		*string = tolower(*string);
+		string++;
+	}
+	
+	return old;
+}
+
+char *strupr(char *string)
+{
+	char *old = string;
+	
+	while(*string)
+	{
+		*string = toupper(*string);
+		string++;
+	}
+	
+	return old;
+}
+
+int atoi(const char *string)
+{
+	return (int)strtol(string, NULL, 10);
+}
+
+long atol(const char *string)
+{
+	return strtol(string, NULL, 10);
+}
+
+int strnlen(const char *s, size_t maxlen)
+{
+	int l=0;
+	
+	while(*(s++) && l<maxlen)
+		l++;
+	
+	return l;
+}
+
+void *memrchr(void *b, int c, size_t len)
+{
+	int i = len - 1;
+	unsigned char *p = b;
+	
+	for(i = len - 1; p[i] != (unsigned char)c && i >= 0;i--);
+	
+	return (i>=0)?&p[i]:NULL;
+}
+
+char *stpcpy(char *dst, const char *src)
+{
+	do
+	{
+		*(dst++) = *src;
+	}while(*(src++));
+	
+	return dst-1;
+}
+
+char *stpncpy(char *dst, const char *src, int len)
+{
+	int c = 0;
+	
+	do
+	{
+		if(c < len)
+			*(dst++) = *src;
+		
+		c++;
+	}while(*(src++) && c < len);
+	
+	return dst-1;
+}
+
+char *strcasestr(const char *big, const char *little)
+{
+	while(*big)
+	{
+		const char *pbig = big;
+		const char *plittle = little;
+		int ok = 1;
+		
+		while(*pbig)
+		{
+			if(tolower(*pbig) != tolower(*plittle))
+			{
+				ok = 0;
+				break;
+			}
+			
+			pbig++;
+			plittle++;
+		}
+		
+		if(ok)
+			return (char*)big;
+		
+		big++;
+	}
+	
+	return NULL;
+}
+
+int strlcpy(char *dst, const char *src, size_t size)
+{
+	char *src_end = memchr((void*)src, '\0', size);
+	
+	if(src_end == NULL)
+		return 0;
+
+	memcpy(dst, src, src_end - src);
+	
+	return (src_end - src);
+}
+
+int strlcat(char *dst, const char *src, size_t size)
+{
+	int dstl = strlen(dst);
+	char *q = dst + dstl;
+	int real_size = size;
+	
+	if(memchr((void*)src, '\0', size))
+		real_size = strlen(src);
+	
+	memcpy(q, src, real_size-dstl-1);
+	if(real_size != size) q[real_size-dstl-1] = '\0';
+	
+	return size-dstl;
+}
+
+void *memmem(const void *big, size_t big_len, const void *little,
+	size_t little_len)
+{
+	int i, j, l;
+	unsigned char *bigp = (unsigned char*)big;
+	unsigned char *littlep = (unsigned char*)little;
+	
+	for(i = 0, l = (int)(big_len - little_len); i <= l; i++, bigp++)
+	{
+		for(j = 0; j < little_len; j++)
+		{
+			if(littlep[j] != bigp[j])
+				break;
+		}
+		
+		if(j == little_len)
+			return bigp;
+	}
+	
+	return NULL;
+}
-- 
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