+utils

src/cc/dapps/oraclefeed.c

@@ -19,6 +19,163 @@
 #include <memory.h>
 #include "cJSON.c"
 
+
+char hexbyte(int32_t c)
+{
+    c &= 0xf;
+    if ( c < 10 )
+        return('0'+c);
+    else if ( c < 16 )
+        return('a'+c-10);
+    else return(0);
+}
+
+int32_t _unhex(char c)
+{
+    if ( c >= '0' && c <= '9' )
+        return(c - '0');
+    else if ( c >= 'a' && c <= 'f' )
+        return(c - 'a' + 10);
+    else if ( c >= 'A' && c <= 'F' )
+        return(c - 'A' + 10);
+    return(-1);
+}
+
+int32_t is_hexstr(char *str,int32_t n)
+{
+    int32_t i;
+    if ( str == 0 || str[0] == 0 )
+        return(0);
+    for (i=0; str[i]!=0; i++)
+    {
+        if ( n > 0 && i >= n )
+            break;
+        if ( _unhex(str[i]) < 0 )
+            break;
+    }
+    if ( n == 0 )
+        return(i);
+    return(i == n);
+}
+
+int32_t unhex(char c)
+{
+    int32_t hex;
+    if ( (hex= _unhex(c)) < 0 )
+    {
+        //printf("unhex: illegal hexchar.(%c)\n",c);
+    }
+    return(hex);
+}
+
+unsigned char _decode_hex(char *hex) { return((unhex(hex[0])<<4) | unhex(hex[1])); }
+
+int32_t decode_hex(unsigned char *bytes,int32_t n,char *hex)
+{
+    int32_t adjust,i = 0;
+    //printf("decode.(%s)\n",hex);
+    if ( is_hexstr(hex,n) <= 0 )
+    {
+        memset(bytes,0,n);
+        return(n);
+    }
+    if ( hex[n-1] == '\n' || hex[n-1] == '\r' )
+        hex[--n] = 0;
+    if ( hex[n-1] == '\n' || hex[n-1] == '\r' )
+        hex[--n] = 0;
+    if ( n == 0 || (hex[n*2+1] == 0 && hex[n*2] != 0) )
+    {
+        if ( n > 0 )
+        {
+            bytes[0] = unhex(hex[0]);
+            printf("decode_hex n.%d hex[0] (%c) -> %d hex.(%s) [n*2+1: %d] [n*2: %d %c] len.%ld\n",n,hex[0],bytes[0],hex,hex[n*2+1],hex[n*2],hex[n*2],(long)strlen(hex));
+        }
+        bytes++;
+        hex++;
+        adjust = 1;
+    } else adjust = 0;
+    if ( n > 0 )
+    {
+        for (i=0; i<n; i++)
+            bytes[i] = _decode_hex(&hex[i*2]);
+    }
+    //bytes[i] = 0;
+    return(n + adjust);
+}
+
+int32_t init_hexbytes_noT(char *hexbytes,unsigned char *message,long len)
+{
+    int32_t i;
+    if ( len <= 0 )
+    {
+        hexbytes[0] = 0;
+        return(1);
+    }
+    for (i=0; i<len; i++)
+    {
+        hexbytes[i*2] = hexbyte((message[i]>>4) & 0xf);
+        hexbytes[i*2 + 1] = hexbyte(message[i] & 0xf);
+        //printf("i.%d (%02x) [%c%c]\n",i,message[i],hexbytes[i*2],hexbytes[i*2+1]);
+    }
+    hexbytes[len*2] = 0;
+    //printf("len.%ld\n",len*2+1);
+    return((int32_t)len*2+1);
+}
+
+long _stripwhite(char *buf,int accept)
+{
+    int32_t i,j,c;
+    if ( buf == 0 || buf[0] == 0 )
+        return(0);
+    for (i=j=0; buf[i]!=0; i++)
+    {
+        buf[j] = c = buf[i];
+        if ( c == accept || (c != ' ' && c != '\n' && c != '\r' && c != '\t' && c != '\b') )
+            j++;
+    }
+    buf[j] = 0;
+    return(j);
+}
+
+char *clonestr(char *str)
+{
+    char *clone;
+    if ( str == 0 || str[0] == 0 )
+    {
+        printf("warning cloning nullstr.%p\n",str);
+        //#ifdef __APPLE__
+        //        while ( 1 ) sleep(1);
+        //#endif
+        str = (char *)"<nullstr>";
+    }
+    clone = (char *)malloc(strlen(str)+16);
+    strcpy(clone,str);
+    return(clone);
+}
+
+int32_t safecopy(char *dest,char *src,long len)
+{
+    int32_t i = -1;
+    if ( src != 0 && dest != 0 && src != dest )
+    {
+        if ( dest != 0 )
+            memset(dest,0,len);
+        for (i=0; i<len&&src[i]!=0; i++)
+            dest[i] = src[i];
+        if ( i == len )
+        {
+            printf("safecopy: %s too long %ld\n",src,len);
+            //printf("divide by zero! %d\n",1/zeroval());
+#ifdef __APPLE__
+            //getchar();
+#endif
+            return(-1);
+        }
+        dest[i] = 0;
+    }
+    return(i);
+}
+
 char *nonportable_path(char *str)
 {
     int32_t i;