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-rw-r--r--lib/mprintf.c184
1 files changed, 101 insertions, 83 deletions
diff --git a/lib/mprintf.c b/lib/mprintf.c
index 23070a76..73f854bc 100644
--- a/lib/mprintf.c
+++ b/lib/mprintf.c
@@ -5,11 +5,11 @@
* | (__| |_| | _ <| |___
* \___|\___/|_| \_\_____|
*
- * Copyright (C) 1999 - 2014, Daniel Stenberg, <daniel@haxx.se>, et al.
+ * Copyright (C) 1999 - 2016, Daniel Stenberg, <daniel@haxx.se>, et al.
*
* This software is licensed as described in the file COPYING, which
* you should have received as part of this distribution. The terms
- * are also available at http://curl.haxx.se/docs/copyright.html.
+ * are also available at https://curl.haxx.se/docs/copyright.html.
*
* You may opt to use, copy, modify, merge, publish, distribute and/or sell
* copies of the Software, and permit persons to whom the Software is
@@ -32,15 +32,10 @@
*
* 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/
+ * page at https://daniel.haxx.se/projects/trio/
*/
#include "curl_setup.h"
-
-#if defined(DJGPP) && (DJGPP_MINOR < 4)
-#undef _MPRINTF_REPLACE /* don't use x_was_used() here */
-#endif
-
#include <curl/mprintf.h>
#include "curl_memory.h"
@@ -465,22 +460,24 @@ static long dprintf_Pass1(const char *format, va_stack_t *vto, char **endpos,
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! */
+ long k = width - 1;
+ vto[i].width = k;
+ vto[k].type = FORMAT_WIDTH;
+ vto[k].flags = FLAGS_NEW;
+ /* can't use width or precision of width! */
+ vto[k].width = 0;
+ vto[k].precision = 0;
}
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! */
+ long k = precision - 1;
+ vto[i].precision = k;
+ vto[k].type = FORMAT_WIDTH;
+ vto[k].flags = FLAGS_NEW;
+ /* can't use width or precision of width! */
+ vto[k].width = 0;
+ vto[k].precision = 0;
}
*endpos++ = fmt + 1; /* end of this sequence */
}
@@ -488,11 +485,15 @@ static long dprintf_Pass1(const char *format, va_stack_t *vto, char **endpos,
/* 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.as_signed = (mp_intmax_t)va_arg(arglist, int);
+ /* Width/precision arguments must be read before the main argument
+ they are attached to */
+ if(vto[i].flags & FLAGS_WIDTHPARAM) {
+ vto[vto[i].width].data.num.as_signed =
+ (mp_intmax_t)va_arg(arglist, int);
+ }
+ if(vto[i].flags & FLAGS_PRECPARAM) {
+ vto[vto[i].precision].data.num.as_signed =
+ (mp_intmax_t)va_arg(arglist, int);
}
switch (vto[i].type) {
@@ -580,6 +581,11 @@ static int dprintf_formatf(
va_stack_t *p;
+ /* 'workend' points to the final buffer byte position, but with an extra
+ byte as margin to avoid the (false?) warning Coverity gives us
+ otherwise */
+ char *workend = &work[sizeof(work) - 2];
+
/* Do the actual %-code parsing */
dprintf_Pass1(format, vto, endpos, ap_save);
@@ -609,6 +615,8 @@ static int dprintf_formatf(
/* Used to convert negative in positive. */
mp_intmax_t signed_num;
+ char *w;
+
if(*f != '%') {
/* This isn't a format spec, so write everything out until the next one
OR end of string is reached. */
@@ -645,16 +653,30 @@ static int dprintf_formatf(
p = &vto[param];
/* pick up the specified width */
- if(p->flags & FLAGS_WIDTHPARAM)
+ if(p->flags & FLAGS_WIDTHPARAM) {
width = (long)vto[p->width].data.num.as_signed;
+ param_num++; /* since the width is extracted from a parameter, we
+ must skip that to get to the next one properly */
+ if(width < 0) {
+ /* "A negative field width is taken as a '-' flag followed by a
+ positive field width." */
+ width = -width;
+ p->flags |= FLAGS_LEFT;
+ p->flags &= ~FLAGS_PAD_NIL;
+ }
+ }
else
width = p->width;
/* pick up the specified precision */
if(p->flags & FLAGS_PRECPARAM) {
prec = (long)vto[p->precision].data.num.as_signed;
- param_num++; /* since the precision is extraced from a parameter, we
+ param_num++; /* since the precision is extracted from a parameter, we
must skip that to get to the next one properly */
+ if(prec < 0)
+ /* "A negative precision is taken as if the precision were
+ omitted." */
+ prec = -1;
}
else if(p->flags & FLAGS_PREC)
prec = p->precision;
@@ -715,72 +737,68 @@ static int dprintf_formatf(
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 -= (long)(workend - w);
- prec -= (long)(workend - w);
- if(is_alt && base == 8 && prec <= 0) {
- *w-- = '0';
- --width;
- }
+ /* Supply a default precision if none was given. */
+ if(prec == -1)
+ prec = 1;
- if(prec > 0) {
- width -= prec;
- while(prec-- > 0)
- *w-- = '0';
- }
+ /* Put the number in WORK. */
+ w = workend;
+ while(num > 0) {
+ *w-- = digits[num % base];
+ num /= base;
+ }
+ width -= (long)(workend - w);
+ prec -= (long)(workend - w);
- if(is_alt && base == 16)
- width -= 2;
+ if(is_alt && base == 8 && prec <= 0) {
+ *w-- = '0';
+ --width;
+ }
- if(is_neg || (p->flags & FLAGS_SHOWSIGN) || (p->flags & FLAGS_SPACE))
- --width;
+ if(prec > 0) {
+ width -= prec;
+ while(prec-- > 0)
+ *w-- = '0';
+ }
- if(!(p->flags & FLAGS_LEFT) && !(p->flags & FLAGS_PAD_NIL))
- while(width-- > 0)
- OUTCHAR(' ');
+ if(is_alt && base == 16)
+ width -= 2;
- if(is_neg)
- OUTCHAR('-');
- else if(p->flags & FLAGS_SHOWSIGN)
- OUTCHAR('+');
- else if(p->flags & FLAGS_SPACE)
- OUTCHAR(' ');
+ if(is_neg || (p->flags & FLAGS_SHOWSIGN) || (p->flags & FLAGS_SPACE))
+ --width;
- if(is_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(' ');
- if(!(p->flags & FLAGS_LEFT) && (p->flags & FLAGS_PAD_NIL))
- while(width-- > 0)
- OUTCHAR('0');
+ if(is_neg)
+ OUTCHAR('-');
+ else if(p->flags & FLAGS_SHOWSIGN)
+ OUTCHAR('+');
+ else if(p->flags & FLAGS_SPACE)
+ OUTCHAR(' ');
+
+ if(is_alt && base == 16) {
+ OUTCHAR('0');
+ if(p->flags & FLAGS_UPPER)
+ OUTCHAR('X');
+ else
+ OUTCHAR('x');
+ }
- /* Write the number. */
- while(++w <= workend) {
- OUTCHAR(*w);
- }
+ if(!(p->flags & FLAGS_LEFT) && (p->flags & FLAGS_PAD_NIL))
+ while(width-- > 0)
+ OUTCHAR('0');
- if(p->flags & FLAGS_LEFT)
- while(width-- > 0)
- OUTCHAR(' ');
+ /* Write the number. */
+ while(++w <= workend) {
+ OUTCHAR(*w);
}
+
+ if(p->flags & FLAGS_LEFT)
+ while(width-- > 0)
+ OUTCHAR(' ');
break;
case FORMAT_STRING:
@@ -809,7 +827,7 @@ static int dprintf_formatf(
else
len = strlen(str);
- width -= (long)len;
+ width -= (len > LONG_MAX) ? LONG_MAX : (long)len;
if(p->flags & FLAGS_ALT)
OUTCHAR('"');
generated by cgit v1.2.3 (git 2.25.1) at 2024-11-12 19:02:32 +0000