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| author | Michael Kerrisk <mtk.manpages@gmail.com> | 2007-04-05 13:29:41 +0000 |
|---|---|---|
| committer | Michael Kerrisk <mtk.manpages@gmail.com> | 2007-04-05 13:29:41 +0000 |
| commit | 7295b7eda04d4d80f032988cb15d22a3610f8780 (patch) | |
| tree | 5e25f36c92af177438fdfbb131d9015b552236ff /man3/printf.3 | |
| parent | 1bef0ec2656f45fa7bee0ac03103eb5ea920ae8e (diff) | |
| download | man-pages-7295b7eda04d4d80f032988cb15d22a3610f8780.tar.gz | |
Replaced tabs with spaces
Diffstat (limited to 'man3/printf.3')
| -rw-r--r-- | man3/printf.3 | 74 |
1 files changed, 42 insertions, 32 deletions
diff --git a/man3/printf.3 b/man3/printf.3 index 256f3b20e6..bcf152fd8c 100644 --- a/man3/printf.3 +++ b/man3/printf.3 @@ -155,13 +155,17 @@ the position in the argument list of the desired argument, indexed starting from 1. Thus, .RS .nf - printf("%*d", width, num); + + printf("%*d", width, num); + .fi .RE and .RS .nf - printf("%2$*1$d", width, num); + + printf("%2$*1$d", width, num); + .fi .RE are equivalent. The second style allows repeated references to the @@ -181,7 +185,7 @@ uses `.' as radix character, and does not have a grouping character. Thus, .RS .nf - printf("%'.2f", 1234567.89); + printf("%'.2f", 1234567.89); .fi .RE results in `1234567.89' in the POSIX locale, in `1234567,89' in the @@ -711,6 +715,7 @@ specification is `%%'. To print \*(Pi to five decimal places: .RS .nf + #include <math.h> #include <stdio.h> fprintf(stdout, "pi = %.5f\en", 4 * atan(1.0)); @@ -725,9 +730,10 @@ and are pointers to strings: .RS .nf + #include <stdio.h> fprintf(stdout, "%s, %s %d, %.2d:%.2d\en", - weekday, month, day, hour, min); + weekday, month, day, hour, min); .fi .RE .PP @@ -736,9 +742,11 @@ Hence, an internationalized version must be able to print the arguments in an order specified by the format: .RS .nf + #include <stdio.h> fprintf(stdout, format, - weekday, month, day, hour, min); + weekday, month, day, hour, min); + .fi .RE where @@ -755,40 +763,42 @@ To allocate a sufficiently large string and print into it (code correct for both glibc 2.0 and glibc 2.1): .RS .nf + #include <stdio.h> #include <stdlib.h> #include <stdarg.h> char * -make_message(const char *fmt, ...) { - /* Guess we need no more than 100 bytes. */ - int n, size = 100; - char *p, *np; - va_list ap; +make_message(const char *fmt, ...) +{ + /* Guess we need no more than 100 bytes. */ + int n, size = 100; + char *p, *np; + va_list ap; - if ((p = malloc(size)) == NULL) - return NULL; + if ((p = malloc(size)) == NULL) + return NULL; - while (1) { - /* Try to print in the allocated space. */ - va_start(ap, fmt); - n = vsnprintf(p, size, fmt, ap); - va_end(ap); - /* If that worked, return the string. */ - if (n > \-1 && n < size) - return p; - /* Else try again with more space. */ - if (n > \-1) /* glibc 2.1 */ - size = n+1; /* precisely what is needed */ - else /* glibc 2.0 */ - size *= 2; /* twice the old size */ - if ((np = realloc (p, size)) == NULL) { - free(p); - return NULL; - } else { - p = np; - } - } + while (1) { + /* Try to print in the allocated space. */ + va_start(ap, fmt); + n = vsnprintf(p, size, fmt, ap); + va_end(ap); + /* If that worked, return the string. */ + if (n > \-1 && n < size) + return p; + /* Else try again with more space. */ + if (n > \-1) /* glibc 2.1 */ + size = n+1; /* precisely what is needed */ + else /* glibc 2.0 */ + size *= 2; /* twice the old size */ + if ((np = realloc (p, size)) == NULL) { + free(p); + return NULL; + } else { + p = np; + } + } } .fi .RE |