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/**
** @file cvtoct.c
**
** @author Numerous CSCI-452 classes
**
** @brief C implementations of common library functions
*/
#ifndef CVTOCT_SRC_INC
#define CVTOCT_SRC_INC
#include <common.h>
#include <lib.h>
/**
** cvtoct(buf,value)
**
** convert a 32-bit unsigned value into a mininal-length (up to
** 11-character) NUL-terminated character string
**
** @param buf Destination buffer
** @param value Value to convert
**
** @return The number of characters placed into the buffer
** (not including the NUL)
**
** NOTE: assumes buf is large enough to hold the resulting string
*/
int cvtoct(char *buf, uint32_t value)
{
int i;
int chars_stored = 0;
char *bp = buf;
uint32_t val;
val = (value & 0xc0000000);
val >>= 30;
for (i = 0; i < 11; i += 1) {
if (i == 10 || val != 0 || chars_stored) {
chars_stored = 1;
val &= 0x7;
*bp++ = val + '0';
}
value <<= 3;
val = (value & 0xe0000000);
val >>= 29;
}
*bp = '\0';
return bp - buf;
}
#endif
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