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- #include <stdarg.h>
- #include "ioprivat.h"
- #include "stream.h"
- #include "strstrea.h"
-
- static char Buffer[BUFSIZ];
- #define EndBuffer (Buffer+BUFSIZ)
- static char* next_chunk = Buffer; // Start of available part of Buffer.
-
- extern char* form(char* format, ...)
- {
- int space_left = EndBuffer - next_chunk;
- if (space_left < (BUFSIZ>>2)) // If less that 25% of the space is available
- next_chunk = Buffer; // start over.
- char* buf = next_chunk;
-
- strstreambuf stream(buf, EndBuffer-buf-1, buf);
- va_list ap;
- va_start(ap, format);
- int count = __vsbprintf(&stream, format, ap);
- va_end(ap);
- stream.sputc(0);
- next_chunk = buf + stream.pcount();
- return buf;
- }
-
- #define u_long unsigned long
-
- static char* itoa(unsigned long i, int size, int neg, int base)
- {
- // Conservative estimate: If base==2, might need 8 characters
- // for each input byte, but normally 3 is plenty.
- int needed = size ? size
- : (base >= 8 ? 3 : 8) * sizeof(unsigned long) + 2;
- int space_left = EndBuffer - next_chunk;
- if (space_left <= needed)
- next_chunk = Buffer; // start over.
-
- char* buf = next_chunk;
-
- register char* ptr = buf+needed+1;
- next_chunk = ptr;
-
- if (needed < (2+neg) || ptr > EndBuffer)
- return NULL;
- *--ptr = 0;
- if (neg)
- *--ptr = '-';
-
- if (i == 0)
- *--ptr = '0';
- while (i != 0 && ptr > buf) {
- int ch = i % base;
- i = i / base;
- if (ch > 10)
- ch += 'a' - 10;
- else
- ch += '0';
- *--ptr = ch;
- }
- if (size == 0)
- return ptr;
- while (ptr > buf)
- *--ptr = ' ';
- return buf;
- }
-
- char* dec(long i, int len=0)
- {
- if (i >= 0) return itoa((unsigned long)i, len, 0, 10);
- else return itoa((unsigned long)(-i), len, 1, 10);
- }
- extern char* dec(int i, int len=0)
- {
- if (i >= 0) return itoa((unsigned long)i, len, 0, 10);
- else return itoa((unsigned long)(-i), len, 1, 10);
- }
- char* dec(unsigned long i, int len =0)
- {
- return itoa(i, len, 0, 10);
- }
- char* dec(unsigned int i, int len=0)
- {
- return itoa(i, len, 0, 10);
- }
-
- char* hex(long i, int len=0)
- {
- return itoa((unsigned long)i, len, 0, 16);
- }
- extern char* hex(int i, int len=0)
- {
- return itoa((unsigned long)i, len, 0, 16);
- }
- char* hex(unsigned long i, int len =0)
- {
- return itoa(i, len, 0, 16);
- }
- char* hex(unsigned int i, int len=0)
- {
- return itoa(i, len, 0, 16);
- }
-
- char* oct(long i, int len=0)
- {
- return itoa((unsigned long)i, len, 0, 8);
- }
- extern char* oct(int i, int len=0)
- {
- return itoa((unsigned long)i, len, 0, 8);
- }
- char* oct(unsigned long i, int len =0)
- {
- return itoa(i, len, 0, 8);
- }
- char* oct(unsigned int i, int len=0)
- {
- return itoa(i, len, 0, 8);
- }
-