URL https://opencores.org/ocsvn/eco32/eco32/trunk

Subversion Repositories eco32

[/] [eco32/] [trunk/] [hwtests/] [xcptest/] [lib.c] - Blame information for rev 85

Go to most recent revision | Details | Compare with Previous | View Log


/*
 * lib.c -- the library
 */
 
 
#include "common.h"
#include "lib.h"
#include "stdarg.h"
#include "start.h"
 
 
/**************************************************************/
 
 
/*
 * This is only for debugging.
 * Place a breakpoint at the very beginning of this routine
 * and call it wherever you want to break execution.
 */
void debugBreak(void) {
}
 
 
/**************************************************************/
 
 
/*
 * Count the length of a string (without terminating null character).
 */
int strlen(const char *s) {
  const char *p;
 
  p = s;
  while (*p != '\0') {
    p++;
  }
  return p - s;
}
 
 
/*
 * Compare two strings.
 * Return a number < 0, = 0, or > 0 iff the first string is less
 * than, equal to, or greater than the second one, respectively.
 */
int strcmp(const char *s, const char *t) {
  while (*s == *t) {
    if (*s == '\0') {
      return 0;
    }
    s++;
    t++;
  }
  return *s - *t;
}
 
 
/*
 * Copy string t to string s (includes terminating null character).
 */
char *strcpy(char *s, const char *t) {
  char *p;
 
  p = s;
  while ((*p = *t) != '\0') {
    p++;
    t++;
  }
  return s;
}
 
 
/*
 * Append string t to string s.
 */
char *strcat(char *s, const char *t) {
  char *p;
 
  p = s;
  while (*p != '\0') {
    p++;
  }
  while ((*p = *t) != '\0') {
    p++;
    t++;
  }
  return s;
}
 
 
/*
 * Locate character c in string s.
 */
char *strchr(const char *s, char c) {
  while (*s != c) {
    if (*s == '\0') {
      return NULL;
    }
    s++;
  }
  return (char *) s;
}
 
 
/*
 * Extract the next token from the string s, delimited
 * by any character from the delimiter string t.
 */
char *strtok(char *s, const char *t) {
  static char *p;
  char *q;
 
  if (s != NULL) {
    p = s;
  } else {
    p++;
  }
  while (*p != '\0' && strchr(t, *p) != NULL) {
    p++;
  }
  if (*p == '\0') {
    return NULL;
  }
  q = p++;
  while (*p != '\0' && strchr(t, *p) == NULL) {
    p++;
  }
  if (*p != '\0') {
    *p = '\0';
  } else {
    p--;
  }
  return q;
}
 
 
/**************************************************************/
 
 
/*
 * Determine if a character is 'white space'.
 */
static Bool isspace(char c) {
  Bool res;
 
  switch (c) {
    case ' ':
    case '\f':
    case '\n':
    case '\r':
    case '\t':
    case '\v':
      res = true;
      break;
    default:
      res = false;
      break;
  }
  return res;
}
 
 
/*
 * Check for valid digit, and convert to value.
 */
static Bool checkDigit(char c, int base, int *value) {
  if (c >= '0' && c <= '9') {
    *value = c - '0';
  } else
  if (c >= 'A' && c <= 'Z') {
    *value = c - 'A' + 10;
  } else
  if (c >= 'a' && c <= 'z') {
    *value = c - 'a' + 10;
  } else {
    return false;
  }
  return *value < base;
}
 
 
/*
 * Convert initial part of string to unsigned long integer.
 */
unsigned long strtoul(const char *s, char **endp, int base) {
  unsigned long res;
  int sign;
  int digit;
 
  res = 0;
  while (isspace(*s)) {
    s++;
  }
  if (*s == '+') {
    sign = 1;
    s++;
  } else
  if (*s == '-') {
    sign = -1;
    s++;
  } else {
    sign = 1;
  }
  if (base == 0 || base == 16) {
    if (*s == '0' &&
        (*(s + 1) == 'x' || *(s + 1) == 'X')) {
      /* base is 16 */
      s += 2;
      base = 16;
    } else {
      /* base is 0 or 16, but number does not start with "0x" */
      if (base == 0) {
        if (*s == '0') {
          s++;
          base = 8;
        } else {
          base = 10;
        }
      } else {
        /* take base as is */
      }
    }
  } else {
    /* take base as is */
  }
  while (checkDigit(*s, base, &digit)) {
    res *= base;
    res += digit;
    s++;
  }
  if (endp != NULL) {
    *endp = (char *) s;
  }
  return sign * res;
}
 
 
/**************************************************************/
 
 
/*
 * Exchange two array items of a given size.
 */
static void xchg(char *p, char *q, int size) {
  char t;
 
  while (size--) {
    t = *p;
    *p++ = *q;
    *q++ = t;
  }
}
 
 
/*
 * This is a recursive version of quicksort.
 */
static void sort(char *l, char *r, int size,
                 int (*cmp)(const void *, const void *)) {
  char *i;
  char *j;
  char *x;
 
  i = l;
  j = r;
  x = l + (((r - l) / size) / 2) * size;
  do {
    while (cmp(i, x) < 0) {
      i += size;
    }
    while (cmp(x, j) < 0) {
      j -= size;
    }
    if (i <= j) {
      /* exchange array elements i and j */
      /* attention: update x if it is one of these */
      if (x == i) {
        x = j;
      } else
      if (x == j) {
        x = i;
      }
      xchg(i, j, size);
      i += size;
      j -= size;
    }
  } while (i <= j);
  if (l < j) {
    sort(l, j, size, cmp);
  }
  if (i < r) {
    sort(i, r, size, cmp);
  }
}
 
 
/*
 * External interface for the quicksort algorithm.
 */
void qsort(void *base, int n, int size,
           int (*cmp)(const void *, const void*)) {
  sort((char *) base, (char *) base + (n - 1) * size, size, cmp);
}
 
 
/**************************************************************/
 
 
/*
 * Input a character from the console.
 */
char getchar(void) {
  return cin();
}
 
 
/*
 * Output a character on the console.
 * Replace LF by CR/LF.
 */
void putchar(char c) {
  if (c == '\n') {
    cout('\r');
  }
  cout(c);
}
 
 
/*
 * Output a string on the console.
 * Replace LF by CR/LF.
 */
void puts(const char *s) {
  while (*s != '\0') {
    putchar(*s);
    s++;
  }
}
 
 
/**************************************************************/
 
 
/*
 * Count the number of characters needed to represent
 * a given number in base 10.
 */
static int countPrintn(long n) {
  long a;
  int res;
 
  res = 0;
  if (n < 0) {
    res++;
    n = -n;
  }
  a = n / 10;
  if (a != 0) {
    res += countPrintn(a);
  }
  return res + 1;
}
 
 
/*
 * Output a number in base 10.
 */
static void *printn(void *(*emit)(void *, char), void *arg,
                    int *nchar, long n) {
  long a;
 
  if (n < 0) {
    arg = emit(arg, '-');
    (*nchar)++;
    n = -n;
  }
  a = n / 10;
  if (a != 0) {
    arg = printn(emit, arg, nchar, a);
  }
  arg = emit(arg, n % 10 + '0');
  (*nchar)++;
  return arg;
}
 
 
/*
 * Count the number of characters needed to represent
 * a given number in a given base.
 */
static int countPrintu(unsigned long n, unsigned long b) {
  unsigned long a;
  int res;
 
  res = 0;
  a = n / b;
  if (a != 0) {
    res += countPrintu(a, b);
  }
  return res + 1;
}
 
 
/*
 * Output a number in a given base.
 */
static void *printu(void *(*emit)(void *, char), void *arg,
                    int *nchar, unsigned long n, unsigned long b,
                    Bool upperCase) {
  unsigned long a;
 
  a = n / b;
  if (a != 0) {
    arg = printu(emit, arg, nchar, a, b, upperCase);
  }
  if (upperCase) {
    arg = emit(arg, "0123456789ABCDEF"[n % b]);
    (*nchar)++;
  } else {
    arg = emit(arg, "0123456789abcdef"[n % b]);
    (*nchar)++;
  }
  return arg;
}
 
 
/*
 * Output a number of filler characters.
 */
static void *fill(void *(*emit)(void *, char), void *arg,
                  int *nchar, int numFillers, char filler) {
  while (numFillers-- > 0) {
    arg = emit(arg, filler);
    (*nchar)++;
  }
  return arg;
}
 
 
/*
 * This function does the real work of formatted printing.
 */
static int doPrintf(void *(*emit)(void *, char), void *arg,
                    const char *fmt, va_list ap) {
  int nchar;
  char c;
  int n;
  long ln;
  unsigned int u;
  unsigned long lu;
  char *s;
  Bool negFlag;
  char filler;
  int width, count;
 
  nchar = 0;
  while (1) {
    while ((c = *fmt++) != '%') {
      if (c == '\0') {
        return nchar;
      }
      arg = emit(arg, c);
      nchar++;
    }
    c = *fmt++;
    if (c == '-') {
      negFlag = true;
      c = *fmt++;
    } else {
      negFlag = false;
    }
    if (c == '0') {
      filler = '0';
      c = *fmt++;
    } else {
      filler = ' ';
    }
    width = 0;
    while (c >= '0' && c <= '9') {
      width *= 10;
      width += c - '0';
      c = *fmt++;
    }
    if (c == 'd') {
      n = va_arg(ap, int);
      count = countPrintn(n);
      if (width > 0 && !negFlag) {
        arg = fill(emit, arg, &nchar, width - count, filler);
      }
      arg = printn(emit, arg, &nchar, n);
      if (width > 0 && negFlag) {
        arg = fill(emit, arg, &nchar, width - count, filler);
      }
    } else
    if (c == 'u' || c == 'o' || c == 'x' || c == 'X') {
      u = va_arg(ap, int);
      count = countPrintu(u,
                c == 'o' ? 8 : ((c == 'x' || c == 'X') ? 16 : 10));
      if (width > 0 && !negFlag) {
        arg = fill(emit, arg, &nchar, width - count, filler);
      }
      arg = printu(emit, arg, &nchar, u,
                   c == 'o' ? 8 : ((c == 'x' || c == 'X') ? 16 : 10),
                   c == 'X');
      if (width > 0 && negFlag) {
        arg = fill(emit, arg, &nchar, width - count, filler);
      }
    } else
    if (c == 'l') {
      c = *fmt++;
      if (c == 'd') {
        ln = va_arg(ap, long);
        count = countPrintn(ln);
        if (width > 0 && !negFlag) {
          arg = fill(emit, arg, &nchar, width - count, filler);
        }
        arg = printn(emit, arg, &nchar, ln);
        if (width > 0 && negFlag) {
          arg = fill(emit, arg, &nchar, width - count, filler);
        }
      } else
      if (c == 'u' || c == 'o' || c == 'x' || c == 'X') {
        lu = va_arg(ap, long);
        count = countPrintu(lu,
                  c == 'o' ? 8 : ((c == 'x' || c == 'X') ? 16 : 10));
        if (width > 0 && !negFlag) {
          arg = fill(emit, arg, &nchar, width - count, filler);
        }
        arg = printu(emit, arg, &nchar, lu,
                     c == 'o' ? 8 : ((c == 'x' || c == 'X') ? 16 : 10),
                     c == 'X');
        if (width > 0 && negFlag) {
          arg = fill(emit, arg, &nchar, width - count, filler);
        }
      } else {
        arg = emit(arg, 'l');
        nchar++;
        arg = emit(arg, c);
        nchar++;
      }
    } else
    if (c == 's') {
      s = va_arg(ap, char *);
      count = strlen(s);
      if (width > 0 && !negFlag) {
        arg = fill(emit, arg, &nchar, width - count, filler);
      }
      while ((c = *s++) != '\0') {
        arg = emit(arg, c);
        nchar++;
      }
      if (width > 0 && negFlag) {
        arg = fill(emit, arg, &nchar, width - count, filler);
      }
    } else
    if (c == 'c') {
      c = va_arg(ap, char);
      arg = emit(arg, c);
      nchar++;
    } else {
      arg = emit(arg, c);
      nchar++;
    }
  }
  /* never reached */
  return 0;
}
 
 
/*
 * Emit a character to the console.
 */
static void *emitToConsole(void *dummy, char c) {
  putchar(c);
  return dummy;
}
 
 
/*
 * Formatted output with a variable argument list.
 */
static int vprintf(const char *fmt, va_list ap) {
  int n;
 
  n = doPrintf(emitToConsole, NULL, fmt, ap);
  return n;
}
 
 
/*
 * Formatted output.
 */
int printf(const char *fmt, ...) {
  int n;
  va_list ap;
 
  va_start(ap, fmt);
  n = vprintf(fmt, ap);
  va_end(ap);
  return n;
}
 
 
/*
 * Emit a character to a buffer.
 */
static void *emitToBuffer(void *bufptr, char c) {
  *(char *)bufptr = c;
  return (char *) bufptr + 1;
}
 
 
/*
 * Formatted output into a buffer with a variable argument list.
 */
static int vsprintf(char *s, const char *fmt, va_list ap) {
  int n;
 
  n = doPrintf(emitToBuffer, s, fmt, ap);
  s[n] = '\0';
  return n;
}
 
 
/*
 * Formatted output into a buffer.
 */
int sprintf(char *s, const char *fmt, ...) {
  int n;
  va_list ap;
 
  va_start(ap, fmt);
  n = vsprintf(s, fmt, ap);
  va_end(ap);
  return n;
}

Browse

Tools

Subversion Repositories eco32

[/] [eco32/] [trunk/] [hwtests/] [xcptest/] [lib.c] - Blame information for rev 85

Line No.	Rev	Author	Line
1	14	hellwig	`/*`
2			`* lib.c -- the library`
3			`*/`
4
5
6			`#include "common.h"`
7			`#include "lib.h"`
8			`#include "stdarg.h"`
9			`#include "start.h"`
10
11
12			`/**************************************************************/`
13
14
15			`/*`
16			`* This is only for debugging.`
17			`* Place a breakpoint at the very beginning of this routine`
18			`* and call it wherever you want to break execution.`
19			`*/`
20			`void debugBreak(void) {`
21			`}`
22
23
24			`/**************************************************************/`
25
26
27			`/*`
28			`* Count the length of a string (without terminating null character).`
29			`*/`
30			`int strlen(const char *s) {`
31			`const char *p;`
32
33			`p = s;`
34			`while (*p != '\0') {`
35			`p++;`
36			`}`
37			`return p - s;`
38			`}`
39
40
41			`/*`
42			`* Compare two strings.`
43			`* Return a number < 0, = 0, or > 0 iff the first string is less`
44			`* than, equal to, or greater than the second one, respectively.`
45			`*/`
46			`int strcmp(const char s, const char t) {`
47			`while (s == t) {`
48			`if (*s == '\0') {`
49			`return 0;`
50			`}`
51			`s++;`
52			`t++;`
53			`}`
54			`return s - t;`
55			`}`
56
57
58			`/*`
59			`* Copy string t to string s (includes terminating null character).`
60			`*/`
61			`char strcpy(char s, const char *t) {`
62			`char *p;`
63
64			`p = s;`
65			`while ((p = t) != '\0') {`
66			`p++;`
67			`t++;`
68			`}`
69			`return s;`
70			`}`
71
72
73			`/*`
74			`* Append string t to string s.`
75			`*/`
76			`char strcat(char s, const char *t) {`
77			`char *p;`
78
79			`p = s;`
80			`while (*p != '\0') {`
81			`p++;`
82			`}`
83			`while ((p = t) != '\0') {`
84			`p++;`
85			`t++;`
86			`}`
87			`return s;`
88			`}`
89
90
91			`/*`
92			`* Locate character c in string s.`
93			`*/`
94			`char strchr(const char s, char c) {`
95			`while (*s != c) {`
96			`if (*s == '\0') {`
97			`return NULL;`
98			`}`
99			`s++;`
100			`}`
101			`return (char *) s;`
102			`}`
103
104
105			`/*`
106			`* Extract the next token from the string s, delimited`
107			`* by any character from the delimiter string t.`
108			`*/`
109			`char strtok(char s, const char *t) {`
110			`static char *p;`
111			`char *q;`
112
113			`if (s != NULL) {`
114			`p = s;`
115			`} else {`
116			`p++;`
117			`}`
118			`while (p != '\0' && strchr(t, p) != NULL) {`
119			`p++;`
120			`}`
121			`if (*p == '\0') {`
122			`return NULL;`
123			`}`
124			`q = p++;`
125			`while (p != '\0' && strchr(t, p) == NULL) {`
126			`p++;`
127			`}`
128			`if (*p != '\0') {`
129			`*p = '\0';`
130			`} else {`
131			`p--;`
132			`}`
133			`return q;`
134			`}`
135
136
137			`/**************************************************************/`
138
139
140			`/*`
141			`* Determine if a character is 'white space'.`
142			`*/`
143			`static Bool isspace(char c) {`
144			`Bool res;`
145
146			`switch (c) {`
147			`case ' ':`
148			`case '\f':`
149			`case '\n':`
150			`case '\r':`
151			`case '\t':`
152			`case '\v':`
153			`res = true;`
154			`break;`
155			`default:`
156			`res = false;`
157			`break;`
158			`}`
159			`return res;`
160			`}`
161
162
163			`/*`
164			`* Check for valid digit, and convert to value.`
165			`*/`
166			`static Bool checkDigit(char c, int base, int *value) {`
167			`if (c >= '0' && c <= '9') {`
168			`*value = c - '0';`
169			`} else`
170			`if (c >= 'A' && c <= 'Z') {`
171			`*value = c - 'A' + 10;`
172			`} else`
173			`if (c >= 'a' && c <= 'z') {`
174			`*value = c - 'a' + 10;`
175			`} else {`
176			`return false;`
177			`}`
178			`return *value < base;`
179			`}`
180
181
182			`/*`
183			`* Convert initial part of string to unsigned long integer.`
184			`*/`
185			`unsigned long strtoul(const char s, char *endp, int base) {`
186			`unsigned long res;`
187			`int sign;`
188			`int digit;`
189
190			`res = 0;`
191			`while (isspace(*s)) {`
192			`s++;`
193			`}`
194			`if (*s == '+') {`
195			`sign = 1;`
196			`s++;`
197			`} else`
198			`if (*s == '-') {`
199			`sign = -1;`
200			`s++;`
201			`} else {`
202			`sign = 1;`
203			`}`
204			`if (base == 0 \|\| base == 16) {`
205			`if (*s == '0' &&`
206			`((s + 1) == 'x' \|\| (s + 1) == 'X')) {`
207			`/* base is 16 */`
208			`s += 2;`
209			`base = 16;`
210			`} else {`
211			`/* base is 0 or 16, but number does not start with "0x" */`
212			`if (base == 0) {`
213			`if (*s == '0') {`
214			`s++;`
215			`base = 8;`
216			`} else {`
217			`base = 10;`
218			`}`
219			`} else {`
220			`/* take base as is */`
221			`}`
222			`}`
223			`} else {`
224			`/* take base as is */`
225			`}`
226			`while (checkDigit(*s, base, &digit)) {`
227			`res *= base;`
228			`res += digit;`
229			`s++;`
230			`}`
231			`if (endp != NULL) {`
232			`endp = (char ) s;`
233			`}`
234			`return sign * res;`
235			`}`
236
237
238			`/**************************************************************/`
239
240
241			`/*`
242			`* Exchange two array items of a given size.`
243			`*/`
244			`static void xchg(char p, char q, int size) {`
245			`char t;`
246
247			`while (size--) {`
248			`t = *p;`
249			`p++ = q;`
250			`*q++ = t;`
251			`}`
252			`}`
253
254
255			`/*`
256			`* This is a recursive version of quicksort.`
257			`*/`
258			`static void sort(char l, char r, int size,`
259			`int (cmp)(const void , const void *)) {`
260			`char *i;`
261			`char *j;`
262			`char *x;`
263
264			`i = l;`
265			`j = r;`
266			`x = l + (((r - l) / size) / 2) * size;`
267			`do {`
268			`while (cmp(i, x) < 0) {`
269			`i += size;`
270			`}`
271			`while (cmp(x, j) < 0) {`
272			`j -= size;`
273			`}`
274			`if (i <= j) {`
275			`/* exchange array elements i and j */`
276			`/* attention: update x if it is one of these */`
277			`if (x == i) {`
278			`x = j;`
279			`} else`
280			`if (x == j) {`
281			`x = i;`
282			`}`
283			`xchg(i, j, size);`
284			`i += size;`
285			`j -= size;`
286			`}`
287			`} while (i <= j);`
288			`if (l < j) {`
289			`sort(l, j, size, cmp);`
290			`}`
291			`if (i < r) {`
292			`sort(i, r, size, cmp);`
293			`}`
294			`}`
295
296
297			`/*`
298			`* External interface for the quicksort algorithm.`
299			`*/`
300			`void qsort(void *base, int n, int size,`
301			`int (cmp)(const void , const void*)) {`
302			`sort((char ) base, (char ) base + (n - 1) * size, size, cmp);`
303			`}`
304
305
306			`/**************************************************************/`
307
308
309			`/*`
310			`* Input a character from the console.`
311			`*/`
312			`char getchar(void) {`
313			`return cin();`
314			`}`
315
316
317			`/*`
318			`* Output a character on the console.`
319			`* Replace LF by CR/LF.`
320			`*/`
321			`void putchar(char c) {`
322			`if (c == '\n') {`
323			`cout('\r');`
324			`}`
325			`cout(c);`
326			`}`
327
328
329			`/*`
330			`* Output a string on the console.`
331			`* Replace LF by CR/LF.`
332			`*/`
333			`void puts(const char *s) {`
334			`while (*s != '\0') {`
335			`putchar(*s);`
336			`s++;`
337			`}`
338			`}`
339
340
341			`/**************************************************************/`
342
343
344			`/*`
345			`* Count the number of characters needed to represent`
346			`* a given number in base 10.`
347			`*/`
348			`static int countPrintn(long n) {`
349			`long a;`
350			`int res;`
351
352			`res = 0;`
353			`if (n < 0) {`
354			`res++;`
355			`n = -n;`
356			`}`
357			`a = n / 10;`
358			`if (a != 0) {`
359			`res += countPrintn(a);`
360			`}`
361			`return res + 1;`
362			`}`
363
364
365			`/*`
366			`* Output a number in base 10.`
367			`*/`
368			`static void printn(void (emit)(void , char), void *arg,`
369			`int *nchar, long n) {`
370			`long a;`
371
372			`if (n < 0) {`
373			`arg = emit(arg, '-');`
374			`(*nchar)++;`
375			`n = -n;`
376			`}`
377			`a = n / 10;`
378			`if (a != 0) {`
379			`arg = printn(emit, arg, nchar, a);`
380			`}`
381			`arg = emit(arg, n % 10 + '0');`
382			`(*nchar)++;`
383			`return arg;`
384			`}`
385
386
387			`/*`
388			`* Count the number of characters needed to represent`
389			`* a given number in a given base.`
390			`*/`
391			`static int countPrintu(unsigned long n, unsigned long b) {`
392			`unsigned long a;`
393			`int res;`
394
395			`res = 0;`
396			`a = n / b;`
397			`if (a != 0) {`
398			`res += countPrintu(a, b);`
399			`}`
400			`return res + 1;`
401			`}`
402
403
404			`/*`
405			`* Output a number in a given base.`
406			`*/`
407			`static void printu(void (emit)(void , char), void *arg,`
408			`int *nchar, unsigned long n, unsigned long b,`
409			`Bool upperCase) {`
410			`unsigned long a;`
411
412			`a = n / b;`
413			`if (a != 0) {`
414			`arg = printu(emit, arg, nchar, a, b, upperCase);`
415			`}`
416			`if (upperCase) {`
417			`arg = emit(arg, "0123456789ABCDEF"[n % b]);`
418			`(*nchar)++;`
419			`} else {`
420			`arg = emit(arg, "0123456789abcdef"[n % b]);`
421			`(*nchar)++;`
422			`}`
423			`return arg;`
424			`}`
425
426
427			`/*`
428			`* Output a number of filler characters.`
429			`*/`
430			`static void fill(void (emit)(void , char), void *arg,`
431			`int *nchar, int numFillers, char filler) {`
432			`while (numFillers-- > 0) {`
433			`arg = emit(arg, filler);`
434			`(*nchar)++;`
435			`}`
436			`return arg;`
437			`}`
438
439
440			`/*`
441			`* This function does the real work of formatted printing.`
442			`*/`
443			`static int doPrintf(void (emit)(void , char), void arg,`
444			`const char *fmt, va_list ap) {`
445			`int nchar;`
446			`char c;`
447			`int n;`
448			`long ln;`
449			`unsigned int u;`
450			`unsigned long lu;`
451			`char *s;`
452			`Bool negFlag;`
453			`char filler;`
454			`int width, count;`
455
456			`nchar = 0;`
457			`while (1) {`
458			`while ((c = *fmt++) != '%') {`
459			`if (c == '\0') {`
460			`return nchar;`
461			`}`
462			`arg = emit(arg, c);`
463			`nchar++;`
464			`}`
465			`c = *fmt++;`
466			`if (c == '-') {`
467			`negFlag = true;`
468			`c = *fmt++;`
469			`} else {`
470			`negFlag = false;`
471			`}`
472			`if (c == '0') {`
473			`filler = '0';`
474			`c = *fmt++;`
475			`} else {`
476			`filler = ' ';`
477			`}`
478			`width = 0;`
479			`while (c >= '0' && c <= '9') {`
480			`width *= 10;`
481			`width += c - '0';`
482			`c = *fmt++;`
483			`}`
484			`if (c == 'd') {`
485			`n = va_arg(ap, int);`
486			`count = countPrintn(n);`
487			`if (width > 0 && !negFlag) {`
488			`arg = fill(emit, arg, &nchar, width - count, filler);`
489			`}`
490			`arg = printn(emit, arg, &nchar, n);`
491			`if (width > 0 && negFlag) {`
492			`arg = fill(emit, arg, &nchar, width - count, filler);`
493			`}`
494			`} else`
495			`if (c == 'u' \|\| c == 'o' \|\| c == 'x' \|\| c == 'X') {`
496			`u = va_arg(ap, int);`
497			`count = countPrintu(u,`
498			`c == 'o' ? 8 : ((c == 'x' \|\| c == 'X') ? 16 : 10));`
499			`if (width > 0 && !negFlag) {`
500			`arg = fill(emit, arg, &nchar, width - count, filler);`
501			`}`
502			`arg = printu(emit, arg, &nchar, u,`
503			`c == 'o' ? 8 : ((c == 'x' \|\| c == 'X') ? 16 : 10),`
504			`c == 'X');`
505			`if (width > 0 && negFlag) {`
506			`arg = fill(emit, arg, &nchar, width - count, filler);`
507			`}`
508			`} else`
509			`if (c == 'l') {`
510			`c = *fmt++;`
511			`if (c == 'd') {`
512			`ln = va_arg(ap, long);`
513			`count = countPrintn(ln);`
514			`if (width > 0 && !negFlag) {`
515			`arg = fill(emit, arg, &nchar, width - count, filler);`
516			`}`
517			`arg = printn(emit, arg, &nchar, ln);`
518			`if (width > 0 && negFlag) {`
519			`arg = fill(emit, arg, &nchar, width - count, filler);`
520			`}`
521			`} else`
522			`if (c == 'u' \|\| c == 'o' \|\| c == 'x' \|\| c == 'X') {`
523			`lu = va_arg(ap, long);`
524			`count = countPrintu(lu,`
525			`c == 'o' ? 8 : ((c == 'x' \|\| c == 'X') ? 16 : 10));`
526			`if (width > 0 && !negFlag) {`
527			`arg = fill(emit, arg, &nchar, width - count, filler);`
528			`}`
529			`arg = printu(emit, arg, &nchar, lu,`
530			`c == 'o' ? 8 : ((c == 'x' \|\| c == 'X') ? 16 : 10),`
531			`c == 'X');`
532			`if (width > 0 && negFlag) {`
533			`arg = fill(emit, arg, &nchar, width - count, filler);`
534			`}`
535			`} else {`
536			`arg = emit(arg, 'l');`
537			`nchar++;`
538			`arg = emit(arg, c);`
539			`nchar++;`
540			`}`
541			`} else`
542			`if (c == 's') {`
543			`s = va_arg(ap, char *);`
544			`count = strlen(s);`
545			`if (width > 0 && !negFlag) {`
546			`arg = fill(emit, arg, &nchar, width - count, filler);`
547			`}`
548			`while ((c = *s++) != '\0') {`
549			`arg = emit(arg, c);`
550			`nchar++;`
551			`}`
552			`if (width > 0 && negFlag) {`
553			`arg = fill(emit, arg, &nchar, width - count, filler);`
554			`}`
555			`} else`
556			`if (c == 'c') {`
557			`c = va_arg(ap, char);`
558			`arg = emit(arg, c);`
559			`nchar++;`
560			`} else {`
561			`arg = emit(arg, c);`
562			`nchar++;`
563			`}`
564			`}`
565			`/* never reached */`
566			`return 0;`
567			`}`
568
569
570			`/*`
571			`* Emit a character to the console.`
572			`*/`
573			`static void emitToConsole(void dummy, char c) {`
574			`putchar(c);`
575			`return dummy;`
576			`}`
577
578
579			`/*`
580			`* Formatted output with a variable argument list.`
581			`*/`
582			`static int vprintf(const char *fmt, va_list ap) {`
583			`int n;`
584
585			`n = doPrintf(emitToConsole, NULL, fmt, ap);`
586			`return n;`
587			`}`
588
589
590			`/*`
591			`* Formatted output.`
592			`*/`
593			`int printf(const char *fmt, ...) {`
594			`int n;`
595			`va_list ap;`
596
597			`va_start(ap, fmt);`
598			`n = vprintf(fmt, ap);`
599			`va_end(ap);`
600			`return n;`
601			`}`
602
603
604			`/*`
605			`* Emit a character to a buffer.`
606			`*/`
607			`static void emitToBuffer(void bufptr, char c) {`
608			`(char )bufptr = c;`
609			`return (char *) bufptr + 1;`
610			`}`
611
612
613			`/*`
614			`* Formatted output into a buffer with a variable argument list.`
615			`*/`
616			`static int vsprintf(char s, const char fmt, va_list ap) {`
617			`int n;`
618
619			`n = doPrintf(emitToBuffer, s, fmt, ap);`
620			`s[n] = '\0';`
621			`return n;`
622			`}`
623
624
625			`/*`
626			`* Formatted output into a buffer.`
627			`*/`
628			`int sprintf(char s, const char fmt, ...) {`
629			`int n;`
630			`va_list ap;`
631
632			`va_start(ap, fmt);`
633			`n = vsprintf(s, fmt, ap);`
634			`va_end(ap);`
635			`return n;`
636			`}`