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curl/lib/mprintf.c

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30 KiB
C
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/****************************************************************************
*
* $Id$
*
*************************************************************************
*
* Permission to use, copy, modify, and distribute this software for any
* purpose with or without fee is hereby granted, provided that the above
* copyright notice and this permission notice appear in all copies.
*
* THIS SOFTWARE IS PROVIDED ``AS IS'' AND WITHOUT ANY EXPRESS OR IMPLIED
* WARRANTIES, INCLUDING, WITHOUT LIMITATION, THE IMPLIED WARRANTIES OF
* MERCHANTIBILITY AND FITNESS FOR A PARTICULAR PURPOSE. THE AUTHORS AND
* CONTRIBUTORS ACCEPT NO RESPONSIBILITY IN ANY CONCEIVABLE MANNER.
*
* Purpose:
* A merge of Bjorn Reese's format() function and Daniel's dsprintf()
* 1.0. A full blooded printf() clone with full support for <num>$
* everywhere (parameters, widths and precisions) including variabled
* sized parameters (like doubles, long longs, long doubles and even
* void * in 64-bit architectures).
*
* Current restrictions:
* - Max 128 parameters
* - No 'long double' support.
*
* If you ever want truly portable and good *printf() clones, the project that
* took on from here is named 'Trio' and you find more details on the trio web
* page at http://daniel.haxx.se/trio/
*/
#include "setup.h"
#include <sys/types.h>
#include <stdio.h>
#include <stdlib.h>
#include <stdarg.h>
#include <ctype.h>
#include <string.h>
#include <curl/mprintf.h>
#ifndef SIZEOF_LONG_DOUBLE
#define SIZEOF_LONG_DOUBLE 0
#endif
#ifndef SIZEOF_SIZE_T
/* default to 4 bytes for size_t unless defined in the config.h */
#define SIZEOF_SIZE_T 4
#endif
#ifdef DPRINTF_DEBUG
#define HAVE_LONGLONG
#define LONG_LONG long long
#define ENABLE_64BIT
#endif
#include "memory.h"
/* The last #include file should be: */
#include "memdebug.h"
#define BUFFSIZE 256 /* buffer for long-to-str and float-to-str calcs */
#define MAX_PARAMETERS 128 /* lame static limit */
#undef TRUE
#undef FALSE
#undef BOOL
#ifdef __cplusplus
# define TRUE true
# define FALSE false
# define BOOL bool
#else
# define TRUE ((char)(1 == 1))
# define FALSE ((char)(0 == 1))
# define BOOL char
#endif
/* Lower-case digits. */
static const char lower_digits[] = "0123456789abcdefghijklmnopqrstuvwxyz";
/* Upper-case digits. */
static const char upper_digits[] = "0123456789ABCDEFGHIJKLMNOPQRSTUVWXYZ";
#define OUTCHAR(x) \
do{ \
if(stream((unsigned char)(x), (FILE *)data) != -1) \
done++; \
else \
return done; /* return immediately on failure */ \
} while(0)
/* Data type to read from the arglist */
typedef enum {
FORMAT_UNKNOWN = 0,
FORMAT_STRING,
FORMAT_PTR,
FORMAT_INT,
FORMAT_INTPTR,
FORMAT_LONG,
FORMAT_LONGLONG,
FORMAT_DOUBLE,
FORMAT_LONGDOUBLE,
FORMAT_WIDTH /* For internal use */
} FormatType;
/* convertion and display flags */
enum {
FLAGS_NEW = 0,
FLAGS_SPACE = 1<<0,
FLAGS_SHOWSIGN = 1<<1,
FLAGS_LEFT = 1<<2,
FLAGS_ALT = 1<<3,
FLAGS_SHORT = 1<<4,
FLAGS_LONG = 1<<5,
FLAGS_LONGLONG = 1<<6,
FLAGS_LONGDOUBLE = 1<<7,
FLAGS_PAD_NIL = 1<<8,
FLAGS_UNSIGNED = 1<<9,
FLAGS_OCTAL = 1<<10,
FLAGS_HEX = 1<<11,
FLAGS_UPPER = 1<<12,
FLAGS_WIDTH = 1<<13, /* '*' or '*<num>$' used */
FLAGS_WIDTHPARAM = 1<<14, /* width PARAMETER was specified */
FLAGS_PREC = 1<<15, /* precision was specified */
FLAGS_PRECPARAM = 1<<16, /* precision PARAMETER was specified */
FLAGS_CHAR = 1<<17, /* %c story */
FLAGS_FLOATE = 1<<18, /* %e or %E */
FLAGS_FLOATG = 1<<19 /* %g or %G */
};
typedef struct {
FormatType type;
int flags;
long width; /* width OR width parameter number */
long precision; /* precision OR precision parameter number */
union {
char *str;
void *ptr;
long num;
#ifdef ENABLE_64BIT
LONG_LONG lnum;
#endif
double dnum;
} data;
} va_stack_t;
struct nsprintf {
char *buffer;
size_t length;
size_t max;
};
struct asprintf {
char *buffer; /* allocated buffer */
size_t len; /* length of string */
size_t alloc; /* length of alloc */
bool fail; /* TRUE if an alloc has failed and thus the output is not
the complete data */
};
int curl_msprintf(char *buffer, const char *format, ...);
static long dprintf_DollarString(char *input, char **end)
{
int number=0;
while(isdigit((int)*input)) {
number *= 10;
number += *input-'0';
input++;
}
if(number && ('$'==*input++)) {
*end = input;
return number;
}
return 0;
}
static BOOL dprintf_IsQualifierNoDollar(char c)
{
switch (c) {
case '-': case '+': case ' ': case '#': case '.':
case '0': case '1': case '2': case '3': case '4':
case '5': case '6': case '7': case '8': case '9':
case 'h': case 'l': case 'L': case 'z': case 'q':
case '*': case 'O':
return TRUE;
default:
return FALSE;
}
}
#ifdef DPRINTF_DEBUG2
int dprintf_Pass1Report(va_stack_t *vto, int max)
{
int i;
char buffer[128];
int bit;
int flags;
for(i=0; i<max; i++) {
char *type;
switch(vto[i].type) {
case FORMAT_UNKNOWN:
type = "unknown";
break;
case FORMAT_STRING:
type ="string";
break;
case FORMAT_PTR:
type ="pointer";
break;
case FORMAT_INT:
type = "int";
break;
case FORMAT_LONG:
type = "long";
break;
case FORMAT_LONGLONG:
type = "long long";
break;
case FORMAT_DOUBLE:
type = "double";
break;
case FORMAT_LONGDOUBLE:
type = "long double";
break;
}
buffer[0]=0;
for(bit=0; bit<31; bit++) {
flags = vto[i].flags & (1<<bit);
if(flags & FLAGS_SPACE)
strcat(buffer, "space ");
else if(flags & FLAGS_SHOWSIGN)
strcat(buffer, "plus ");
else if(flags & FLAGS_LEFT)
strcat(buffer, "left ");
else if(flags & FLAGS_ALT)
strcat(buffer, "alt ");
else if(flags & FLAGS_SHORT)
strcat(buffer, "short ");
else if(flags & FLAGS_LONG)
strcat(buffer, "long ");
else if(flags & FLAGS_LONGLONG)
strcat(buffer, "longlong ");
else if(flags & FLAGS_LONGDOUBLE)
strcat(buffer, "longdouble ");
else if(flags & FLAGS_PAD_NIL)
strcat(buffer, "padnil ");
else if(flags & FLAGS_UNSIGNED)
strcat(buffer, "unsigned ");
else if(flags & FLAGS_OCTAL)
strcat(buffer, "octal ");
else if(flags & FLAGS_HEX)
strcat(buffer, "hex ");
else if(flags & FLAGS_UPPER)
strcat(buffer, "upper ");
else if(flags & FLAGS_WIDTH)
strcat(buffer, "width ");
else if(flags & FLAGS_WIDTHPARAM)
strcat(buffer, "widthparam ");
else if(flags & FLAGS_PREC)
strcat(buffer, "precision ");
else if(flags & FLAGS_PRECPARAM)
strcat(buffer, "precparam ");
else if(flags & FLAGS_CHAR)
strcat(buffer, "char ");
else if(flags & FLAGS_FLOATE)
strcat(buffer, "floate ");
else if(flags & FLAGS_FLOATG)
strcat(buffer, "floatg ");
}
printf("REPORT: %d. %s [%s]\n", i, type, buffer);
}
}
#endif
/******************************************************************
*
* Pass 1:
* Create an index with the type of each parameter entry and its
* value (may vary in size)
*
******************************************************************/
static long dprintf_Pass1(char *format, va_stack_t *vto, char **endpos,
va_list arglist)
{
char *fmt = format;
int param_num = 0;
long this_param;
long width;
long precision;
int flags;
long max_param=0;
long i;
while (*fmt) {
if (*fmt++ == '%') {
if (*fmt == '%') {
fmt++;
continue; /* while */
}
flags = FLAGS_NEW;
/* Handle the positional case (N$) */
param_num++;
this_param = dprintf_DollarString(fmt, &fmt);
if (0 == this_param)
/* we got no positional, get the next counter */
this_param = param_num;
if (this_param > max_param)
max_param = this_param;
/*
* The parameter with number 'i' should be used. Next, we need
* to get SIZE and TYPE of the parameter. Add the information
* to our array.
*/
width = 0;
precision = 0;
/* Handle the flags */
while (dprintf_IsQualifierNoDollar(*fmt)) {
switch (*fmt++) {
case ' ':
flags |= FLAGS_SPACE;
break;
case '+':
flags |= FLAGS_SHOWSIGN;
break;
case '-':
flags |= FLAGS_LEFT;
flags &= ~FLAGS_PAD_NIL;
break;
case '#':
flags |= FLAGS_ALT;
break;
case '.':
flags |= FLAGS_PREC;
if ('*' == *fmt) {
/* The precision is picked from a specified parameter */
flags |= FLAGS_PRECPARAM;
fmt++;
param_num++;
i = dprintf_DollarString(fmt, &fmt);
if (i)
precision = i;
else
precision = param_num;
if (precision > max_param)
max_param = precision;
}
else {
flags |= FLAGS_PREC;
precision = strtol(fmt, &fmt, 10);
}
break;
case 'h':
flags |= FLAGS_SHORT;
break;
case 'l':
if (flags & FLAGS_LONG)
flags |= FLAGS_LONGLONG;
else
flags |= FLAGS_LONG;
break;
case 'L':
flags |= FLAGS_LONGDOUBLE;
break;
case 'q':
flags |= FLAGS_LONGLONG;
break;
case 'z':
/* the code below generates a warning if -Wunreachable-code is
used */
#if SIZEOF_SIZE_T>4
flags |= FLAGS_LONGLONG;
#else
flags |= FLAGS_LONG;
#endif
break;
case 'O':
#if SIZEOF_CURL_OFF_T > 4
flags |= FLAGS_LONGLONG;
#else
flags |= FLAGS_LONG;
#endif
break;
case '0':
if (!(flags & FLAGS_LEFT))
flags |= FLAGS_PAD_NIL;
/* FALLTHROUGH */
case '1': case '2': case '3': case '4':
case '5': case '6': case '7': case '8': case '9':
flags |= FLAGS_WIDTH;
width = strtol(fmt-1, &fmt, 10);
break;
case '*': /* Special case */
flags |= FLAGS_WIDTHPARAM;
param_num++;
i = dprintf_DollarString(fmt, &fmt);
if(i)
width = i;
else
width = param_num;
if(width > max_param)
max_param=width;
break;
default:
break;
}
} /* switch */
/* Handle the specifier */
i = this_param - 1;
switch (*fmt) {
case 'S':
flags |= FLAGS_ALT;
/* FALLTHROUGH */
case 's':
vto[i].type = FORMAT_STRING;
break;
case 'n':
vto[i].type = FORMAT_INTPTR;
break;
case 'p':
vto[i].type = FORMAT_PTR;
break;
case 'd': case 'i':
vto[i].type = FORMAT_INT;
break;
case 'u':
vto[i].type = FORMAT_INT;
flags |= FLAGS_UNSIGNED;
break;
case 'o':
vto[i].type = FORMAT_INT;
flags |= FLAGS_OCTAL;
break;
case 'x':
vto[i].type = FORMAT_INT;
flags |= FLAGS_HEX;
break;
case 'X':
vto[i].type = FORMAT_INT;
flags |= FLAGS_HEX|FLAGS_UPPER;
break;
case 'c':
vto[i].type = FORMAT_INT;
flags |= FLAGS_CHAR;
break;
case 'f':
vto[i].type = FORMAT_DOUBLE;
break;
case 'e':
vto[i].type = FORMAT_DOUBLE;
flags |= FLAGS_FLOATE;
break;
case 'E':
vto[i].type = FORMAT_DOUBLE;
flags |= FLAGS_FLOATE|FLAGS_UPPER;
break;
case 'g':
vto[i].type = FORMAT_DOUBLE;
flags |= FLAGS_FLOATG;
break;
case 'G':
vto[i].type = FORMAT_DOUBLE;
flags |= FLAGS_FLOATG|FLAGS_UPPER;
break;
default:
vto[i].type = FORMAT_UNKNOWN;
break;
} /* switch */
vto[i].flags = flags;
vto[i].width = width;
vto[i].precision = precision;
if (flags & FLAGS_WIDTHPARAM) {
/* we have the width specified from a parameter, so we make that
parameter's info setup properly */
vto[i].width = width - 1;
i = width - 1;
vto[i].type = FORMAT_WIDTH;
vto[i].flags = FLAGS_NEW;
vto[i].precision = vto[i].width = 0; /* can't use width or precision
of width! */
}
if (flags & FLAGS_PRECPARAM) {
/* we have the precision specified from a parameter, so we make that
parameter's info setup properly */
vto[i].precision = precision - 1;
i = precision - 1;
vto[i].type = FORMAT_WIDTH;
vto[i].flags = FLAGS_NEW;
vto[i].precision = vto[i].width = 0; /* can't use width or precision
of width! */
}
*endpos++ = fmt + 1; /* end of this sequence */
}
}
#ifdef DPRINTF_DEBUG2
dprintf_Pass1Report(vto, max_param);
#endif
/* Read the arg list parameters into our data list */
for (i=0; i<max_param; i++) {
if ((i + 1 < max_param) && (vto[i + 1].type == FORMAT_WIDTH))
{
/* Width/precision arguments must be read before the main argument
* they are attached to
*/
vto[i + 1].data.num = va_arg(arglist, int);
}
switch (vto[i].type)
{
case FORMAT_STRING:
vto[i].data.str = va_arg(arglist, char *);
break;
case FORMAT_INTPTR:
case FORMAT_UNKNOWN:
case FORMAT_PTR:
vto[i].data.ptr = va_arg(arglist, void *);
break;
case FORMAT_INT:
#ifdef ENABLE_64BIT
if(vto[i].flags & FLAGS_LONGLONG)
vto[i].data.lnum = va_arg(arglist, LONG_LONG);
else
#endif
if(vto[i].flags & FLAGS_LONG)
vto[i].data.num = va_arg(arglist, long);
else
vto[i].data.num = va_arg(arglist, int);
break;
case FORMAT_DOUBLE:
vto[i].data.dnum = va_arg(arglist, double);
break;
case FORMAT_WIDTH:
/* Argument has been read. Silently convert it into an integer
* for later use
*/
vto[i].type = FORMAT_INT;
break;
default:
break;
}
}
return max_param;
}
static int dprintf_formatf(
void *data, /* untouched by format(), just sent to the stream() function in
the second argument */
/* function pointer called for each output character */
int (*stream)(int, FILE *),
const char *format, /* %-formatted string */
va_list ap_save) /* list of parameters */
{
/* Base-36 digits for numbers. */
const char *digits = lower_digits;
/* Pointer into the format string. */
char *f;
/* Number of characters written. */
int done = 0;
long param; /* current parameter to read */
long param_num=0; /* parameter counter */
va_stack_t vto[MAX_PARAMETERS];
char *endpos[MAX_PARAMETERS];
char **end;
char work[BUFFSIZE];
va_stack_t *p;
/* Do the actual %-code parsing */
dprintf_Pass1((char *)format, vto, endpos, ap_save);
end = &endpos[0]; /* the initial end-position from the list dprintf_Pass1()
created for us */
f = (char *)format;
while (*f != '\0') {
/* Format spec modifiers. */
char alt;
/* Width of a field. */
long width;
/* Precision of a field. */
long prec;
/* Decimal integer is negative. */
char is_neg;
/* Base of a number to be written. */
long base;
/* Integral values to be written. */
#ifdef ENABLE_64BIT
unsigned LONG_LONG num;
#else
unsigned long num;
#endif
long signed_num;
if (*f != '%') {
/* This isn't a format spec, so write everything out until the next one
OR end of string is reached. */
do {
OUTCHAR(*f);
} while(*++f && ('%' != *f));
continue;
}
++f;
/* Check for "%%". Note that although the ANSI standard lists
'%' as a conversion specifier, it says "The complete format
specification shall be `%%'," so we can avoid all the width
and precision processing. */
if (*f == '%') {
++f;
OUTCHAR('%');
continue;
}
/* If this is a positional parameter, the position must follow imediately
after the %, thus create a %<num>$ sequence */
param=dprintf_DollarString(f, &f);
if(!param)
param = param_num;
else
--param;
param_num++; /* increase this always to allow "%2$s %1$s %s" and then the
third %s will pick the 3rd argument */
p = &vto[param];
/* pick up the specified width */
if(p->flags & FLAGS_WIDTHPARAM)
width = vto[p->width].data.num;
else
width = p->width;
/* pick up the specified precision */
if(p->flags & FLAGS_PRECPARAM)
prec = vto[p->precision].data.num;
else if(p->flags & FLAGS_PREC)
prec = p->precision;
else
prec = -1;
alt = (p->flags & FLAGS_ALT)?TRUE:FALSE;
switch (p->type) {
case FORMAT_INT:
num = p->data.num;
if(p->flags & FLAGS_CHAR) {
/* Character. */
if (!(p->flags & FLAGS_LEFT))
while (--width > 0)
OUTCHAR(' ');
OUTCHAR((char) num);
if (p->flags & FLAGS_LEFT)
while (--width > 0)
OUTCHAR(' ');
break;
}
if(p->flags & FLAGS_UNSIGNED) {
/* Decimal unsigned integer. */
base = 10;
goto unsigned_number;
}
if(p->flags & FLAGS_OCTAL) {
/* Octal unsigned integer. */
base = 8;
goto unsigned_number;
}
if(p->flags & FLAGS_HEX) {
/* Hexadecimal unsigned integer. */
digits = (p->flags & FLAGS_UPPER)? upper_digits : lower_digits;
base = 16;
goto unsigned_number;
}
/* Decimal integer. */
base = 10;
#ifdef ENABLE_64BIT
if(p->flags & FLAGS_LONGLONG) {
/* long long */
is_neg = p->data.lnum < 0;
num = is_neg ? (- p->data.lnum) : p->data.lnum;
}
else
#endif
{
signed_num = (long) num;
is_neg = signed_num < 0;
num = is_neg ? (- signed_num) : signed_num;
}
goto number;
unsigned_number:
/* Unsigned number of base BASE. */
is_neg = 0;
number:
/* Number of base BASE. */
{
char *workend = &work[sizeof(work) - 1];
char *w;
/* Supply a default precision if none was given. */
if (prec == -1)
prec = 1;
/* Put the number in WORK. */
w = workend;
while (num > 0) {
*w-- = digits[num % base];
num /= base;
}
width -= workend - w;
prec -= workend - w;
if (alt && base == 8 && prec <= 0) {
*w-- = '0';
--width;
}
if (prec > 0) {
width -= prec;
while (prec-- > 0)
*w-- = '0';
}
if (alt && base == 16)
width -= 2;
if (is_neg || (p->flags & FLAGS_SHOWSIGN) || (p->flags & FLAGS_SPACE))
--width;
if (!(p->flags & FLAGS_LEFT) && !(p->flags & FLAGS_PAD_NIL))
while (width-- > 0)
OUTCHAR(' ');
if (is_neg)
OUTCHAR('-');
else if (p->flags & FLAGS_SHOWSIGN)
OUTCHAR('+');
else if (p->flags & FLAGS_SPACE)
OUTCHAR(' ');
if (alt && base == 16) {
OUTCHAR('0');
if(p->flags & FLAGS_UPPER)
OUTCHAR('X');
else
OUTCHAR('x');
}
if (!(p->flags & FLAGS_LEFT) && (p->flags & FLAGS_PAD_NIL))
while (width-- > 0)
OUTCHAR('0');
/* Write the number. */
while (++w <= workend) {
OUTCHAR(*w);
}
if (p->flags & FLAGS_LEFT)
while (width-- > 0)
OUTCHAR(' ');
}
break;
case FORMAT_STRING:
/* String. */
{
static char null[] = "(nil)";
char *str;
size_t len;
str = (char *) p->data.str;
if ( str == NULL) {
/* Write null[] if there's space. */
if (prec == -1 || prec >= (long) sizeof(null) - 1) {
str = null;
len = sizeof(null) - 1;
/* Disable quotes around (nil) */
p->flags &= (~FLAGS_ALT);
}
else {
str = (char *)"";
len = 0;
}
}
else
len = strlen(str);
if (prec != -1 && (size_t) prec < len)
len = prec;
width -= len;
if (p->flags & FLAGS_ALT)
OUTCHAR('"');
if (!(p->flags&FLAGS_LEFT))
while (width-- > 0)
OUTCHAR(' ');
while (len-- > 0)
OUTCHAR(*str++);
if (p->flags&FLAGS_LEFT)
while (width-- > 0)
OUTCHAR(' ');
if (p->flags & FLAGS_ALT)
OUTCHAR('"');
}
break;
case FORMAT_PTR:
/* Generic pointer. */
{
void *ptr;
ptr = (void *) p->data.ptr;
if (ptr != NULL) {
/* If the pointer is not NULL, write it as a %#x spec. */
base = 16;
digits = (p->flags & FLAGS_UPPER)? upper_digits : lower_digits;
alt = 1;
num = (unsigned long) ptr;
is_neg = 0;
goto number;
}
else {
/* Write "(nil)" for a nil pointer. */
static char strnil[] = "(nil)";
char *point;
width -= sizeof(strnil) - 1;
if (p->flags & FLAGS_LEFT)
while (width-- > 0)
OUTCHAR(' ');
for (point = strnil; *point != '\0'; ++point)
OUTCHAR(*point);
if (! (p->flags & FLAGS_LEFT))
while (width-- > 0)
OUTCHAR(' ');
}
}
break;
case FORMAT_DOUBLE:
{
char formatbuf[32]="%";
char *fptr;
size_t left = sizeof(formatbuf)-strlen(formatbuf);
int len;
width = -1;
if (p->flags & FLAGS_WIDTH)
width = p->width;
else if (p->flags & FLAGS_WIDTHPARAM)
width = vto[p->width].data.num;
prec = -1;
if (p->flags & FLAGS_PREC)
prec = p->precision;
else if (p->flags & FLAGS_PRECPARAM)
prec = vto[p->precision].data.num;
if (p->flags & FLAGS_LEFT)
strcat(formatbuf, "-");
if (p->flags & FLAGS_SHOWSIGN)
strcat(formatbuf, "+");
if (p->flags & FLAGS_SPACE)
strcat(formatbuf, " ");
if (p->flags & FLAGS_ALT)
strcat(formatbuf, "#");
fptr=&formatbuf[strlen(formatbuf)];
if(width >= 0) {
/* RECURSIVE USAGE */
len = curl_msnprintf(fptr, left, "%ld", width);
fptr += len;
left -= len;
}
if(prec >= 0) {
/* RECURSIVE USAGE */
len = curl_msnprintf(fptr, left, ".%ld", prec);
fptr += len;
left -= len;
}
if (p->flags & FLAGS_LONG)
*fptr++ = 'l';
if (p->flags & FLAGS_FLOATE)
*fptr++ = p->flags&FLAGS_UPPER ? 'E':'e';
else if (p->flags & FLAGS_FLOATG)
*fptr++ = p->flags & FLAGS_UPPER ? 'G' : 'g';
else
*fptr++ = 'f';
*fptr = 0; /* and a final zero termination */
/* NOTE NOTE NOTE!! Not all sprintf() implementations returns number
of output characters */
(sprintf)(work, formatbuf, p->data.dnum);
for(fptr=work; *fptr; fptr++)
OUTCHAR(*fptr);
}
break;
case FORMAT_INTPTR:
/* Answer the count of characters written. */
#ifdef ENABLE_64BIT
if (p->flags & FLAGS_LONGLONG)
*(LONG_LONG *) p->data.ptr = (LONG_LONG)done;
else
#endif
if (p->flags & FLAGS_LONG)
*(long *) p->data.ptr = (long)done;
else if (!(p->flags & FLAGS_SHORT))
*(int *) p->data.ptr = (int)done;
else
*(short *) p->data.ptr = (short)done;
break;
default:
break;
}
f = *end++; /* goto end of %-code */
}
return done;
}
/* fputc() look-alike */
static int addbyter(int output, FILE *data)
{
struct nsprintf *infop=(struct nsprintf *)data;
unsigned char outc = (unsigned char)output;
if(infop->length < infop->max) {
/* only do this if we haven't reached max length yet */
infop->buffer[0] = outc; /* store */
infop->buffer++; /* increase pointer */
infop->length++; /* we are now one byte larger */
return outc; /* fputc() returns like this on success */
}
return -1;
}
int curl_mvsnprintf(char *buffer, size_t maxlength, const char *format,
va_list ap_save)
{
int retcode;
struct nsprintf info;
info.buffer = buffer;
info.length = 0;
info.max = maxlength;
retcode = dprintf_formatf(&info, addbyter, format, ap_save);
if(info.max) {
/* we terminate this with a zero byte */
if(info.max == info.length)
/* we're at maximum, scrap the last letter */
info.buffer[-1] = 0;
else
info.buffer[0] = 0;
}
return retcode;
}
int curl_msnprintf(char *buffer, size_t maxlength, const char *format, ...)
{
int retcode;
va_list ap_save; /* argument pointer */
va_start(ap_save, format);
retcode = curl_mvsnprintf(buffer, maxlength, format, ap_save);
va_end(ap_save);
return retcode;
}
/* fputc() look-alike */
static int alloc_addbyter(int output, FILE *data)
{
struct asprintf *infop=(struct asprintf *)data;
unsigned char outc = (unsigned char)output;
if(!infop->buffer) {
infop->buffer=(char *)malloc(32);
if(!infop->buffer) {
infop->fail = TRUE;
return -1; /* fail */
}
infop->alloc = 32;
infop->len =0;
}
else if(infop->len+1 >= infop->alloc) {
char *newptr;
newptr = (char *)realloc(infop->buffer, infop->alloc*2);
if(!newptr) {
infop->fail = TRUE;
return -1;
}
infop->buffer = newptr;
infop->alloc *= 2;
}
infop->buffer[ infop->len ] = outc;
infop->len++;
return outc; /* fputc() returns like this on success */
}
char *curl_maprintf(const char *format, ...)
{
va_list ap_save; /* argument pointer */
int retcode;
struct asprintf info;
info.buffer = NULL;
info.len = 0;
info.alloc = 0;
info.fail = FALSE;
va_start(ap_save, format);
retcode = dprintf_formatf(&info, alloc_addbyter, format, ap_save);
va_end(ap_save);
if((-1 == retcode) || info.fail) {
if(info.alloc)
free(info.buffer);
return NULL;
}
if(info.alloc) {
info.buffer[info.len] = 0; /* we terminate this with a zero byte */
return info.buffer;
}
else
return strdup("");
}
char *curl_mvaprintf(const char *format, va_list ap_save)
{
int retcode;
struct asprintf info;
info.buffer = NULL;
info.len = 0;
info.alloc = 0;
info.fail = FALSE;
retcode = dprintf_formatf(&info, alloc_addbyter, format, ap_save);
if((-1 == retcode) || info.fail) {
if(info.alloc)
free(info.buffer);
return NULL;
}
if(info.alloc) {
info.buffer[info.len] = 0; /* we terminate this with a zero byte */
return info.buffer;
}
else
return strdup("");
}
static int storebuffer(int output, FILE *data)
{
char **buffer = (char **)data;
unsigned char outc = (unsigned char)output;
**buffer = outc;
(*buffer)++;
return outc; /* act like fputc() ! */
}
int curl_msprintf(char *buffer, const char *format, ...)
{
va_list ap_save; /* argument pointer */
int retcode;
va_start(ap_save, format);
retcode = dprintf_formatf(&buffer, storebuffer, format, ap_save);
va_end(ap_save);
*buffer=0; /* we terminate this with a zero byte */
return retcode;
}
#ifndef WIN32 /* not needed on win32 */
extern int fputc(int, FILE *);
#endif
int curl_mprintf(const char *format, ...)
{
int retcode;
va_list ap_save; /* argument pointer */
va_start(ap_save, format);
retcode = dprintf_formatf(stdout, fputc, format, ap_save);
va_end(ap_save);
return retcode;
}
int curl_mfprintf(FILE *whereto, const char *format, ...)
{
int retcode;
va_list ap_save; /* argument pointer */
va_start(ap_save, format);
retcode = dprintf_formatf(whereto, fputc, format, ap_save);
va_end(ap_save);
return retcode;
}
int curl_mvsprintf(char *buffer, const char *format, va_list ap_save)
{
int retcode;
retcode = dprintf_formatf(&buffer, storebuffer, format, ap_save);
*buffer=0; /* we terminate this with a zero byte */
return retcode;
}
int curl_mvprintf(const char *format, va_list ap_save)
{
return dprintf_formatf(stdout, fputc, format, ap_save);
}
int curl_mvfprintf(FILE *whereto, const char *format, va_list ap_save)
{
return dprintf_formatf(whereto, fputc, format, ap_save);
}
#ifdef DPRINTF_DEBUG
int main()
{
char buffer[129];
char *ptr;
#ifdef ENABLE_64BIT
long long one=99;
long long two=100;
long long test = 0x1000000000LL;
curl_mprintf("%lld %lld %lld\n", one, two, test);
#endif
curl_mprintf("%3d %5d\n", 10, 1998);
ptr=curl_maprintf("test this then baby %s%s%s%s%s%s %d %d %d loser baby get a hit in yer face now!", "", "pretty long string pretty long string pretty long string pretty long string pretty long string", "/", "/", "/", "pretty long string", 1998, 1999, 2001);
puts(ptr);
memset(ptr, 55, strlen(ptr)+1);
free(ptr);
#if 1
curl_mprintf(buffer, "%s %s %d", "daniel", "stenberg", 19988);
puts(buffer);
curl_mfprintf(stderr, "%s %#08x\n", "dummy", 65);
printf("%s %#08x\n", "dummy", 65);
{
double tryout = 3.14156592;
curl_mprintf(buffer, "%.2g %G %f %e %E", tryout, tryout, tryout, tryout, tryout);
puts(buffer);
printf("%.2g %G %f %e %E\n", tryout, tryout, tryout, tryout, tryout);
}
#endif
return 0;
}
#endif
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