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[/] [thor/] [trunk/] [software/] [c64libc/] [source/] [string.c] - Blame information for rev 53

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Line No. Rev Author Line
1 22 robfinch 
#define null    0
2 
 
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byte *memcpy(byte *d, byte *s, int size)
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{
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    asm {
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        lw              r1,40[bp]
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        lw              r2,32[bp]
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        lw              r3,48[bp]
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                tst             p0,r3
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        p0.eq   br      .0002
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                subui   r3,r3,#1
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                mtspr   lc,r3
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    .0001:
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        lb    r4,[r1]
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        sb    r4,[r2]
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        addui r1,r1,#1
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        addui r2,r2,#1
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        loop  .0001
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        .0002:
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    }
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        return d;
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}
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short int *memcpyH(short int *d, short int *s, int size)
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{
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    asm {
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        lw              r1,40[bp]
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        lw              r2,32[bp]
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        lw              r3,48[bp]
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    .0001:
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        lh    r4,[r1]
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        sh    r4,[r2]
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        addui r1,r1,#4
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        addui r2,r2,#4
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        subui r3,r3,#1
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                tst       p0,r3
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    p0.gt       br      .0001
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    }
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        return d;
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}
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int *memcpyW(int *d, int *s, int size)
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{
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    asm {
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        lw              r1,40[bp]
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        lw              r2,32[bp]
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        lw              r3,48[bp]
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    .0001:
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        lw    r4,[r1]
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        sw    r4,[r2]
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        addui r1,r1,#8
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        addui r2,r2,#8
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        subui r3,r3,#1
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                tst      p0,r3
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p0.gt   br   .0001
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    }
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        return d;
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}
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byte *memset(byte *p, byte val, int size)
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{
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        asm {
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        lw    r1,32[bp]
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        lw    r2,40[bp]
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        lw    r3,48[bp]
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.0001:
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        sb    r2,[r1]
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        addui r1,r1,#1
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        subui r3,r3,#1
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                tst      p0,r3
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p0.gt   br   .0001
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    }
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        return p;
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}
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short int *memsetH(short int *p, short int val, int size)
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{
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        asm {
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        lw    r1,32[bp]
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        lw    r2,40[bp]
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        lw    r3,48[bp]
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.0001:
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        sh    r2,[r1]
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        addui r1,r1,#4
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        subui r3,r3,#1
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                tst      p0,r3
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p0.gt   br   .0001
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    }
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        return p;
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}
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int *memsetW(int *p, int val, int size)
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{
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        asm {
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        lw    r1,32[bp]
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        lw    r2,40[bp]
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        lw    r3,48[bp]
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.0001:
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        sw    r2,[r1]
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        addui r1,r1,#8
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        subui r3,r3,#1
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                tst      p0,r3
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p0.gt   br   .0001
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    }
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        return p;
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}
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byte *memchr(byte *p, byte val, int n)
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{
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        byte *su;
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        for (su = p; n > 0; ++su, --n)
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                if (*su==val)
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                        return su;
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        return null;
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}
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int strlen(char *p)
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{
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        int n;
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        if (p==(char *)0) return 0;
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        for (n = 0; p[n]; n++)
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                ;
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        return n;
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}
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char *strcpy(char *d, char *s)
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{
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        int nn;
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        for (nn = 0; s[nn]; nn++)
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                d[nn] = s[nn];
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        d[nn] = '\0';
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        return d;
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}
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char *strncpy(char *d, char *s, int size)
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{
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        int nn;
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        for (nn = 0; nn < size; nn++) {
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                d[nn] = s[nn];
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                if (s[nn]=='\0')
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                        break;
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        }
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        for (; nn < size; nn++)
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                d[nn] = '\0';
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        return d;
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}
151 
 
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int strncmp(unsigned char *a, unsigned char *b, int len)
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{
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        unsigned char *ua;
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        unsigned char *ub;
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        ua = a;
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        ub = b;
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        if (ua==ub)     // duh
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                return 0;
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        for (; len > 0; ua++, ub++, len--)
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                if (*ua != *ub)
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                        return *ua < *ub ? -1 : 1;
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                else if (*ua == '\0')
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                        return 0;
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        return 0;
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}
168 
 
169 
char *strchr(char *p, char val, int n)
170 
{
171 
        char *su;
172 
 
173 
        for (su = p; n > 0; ++su, --n)
174 
                if (*su==val)
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                        return su;
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        return null;
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}
178 
 

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