diff options
Diffstat (limited to 'scripts/dtc/util.c')
| -rw-r--r-- | scripts/dtc/util.c | 30 |
1 files changed, 30 insertions, 0 deletions
diff --git a/scripts/dtc/util.c b/scripts/dtc/util.c index fb124eea4919..3550f86bd6df 100644 --- a/scripts/dtc/util.c +++ b/scripts/dtc/util.c @@ -46,6 +46,36 @@ char *xstrdup(const char *s) return d; } +/* based in part from (3) vsnprintf */ +int xasprintf(char **strp, const char *fmt, ...) +{ + int n, size = 128; /* start with 128 bytes */ + char *p; + va_list ap; + + /* initial pointer is NULL making the fist realloc to be malloc */ + p = NULL; + while (1) { + p = xrealloc(p, size); + + /* 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) + break; + /* 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 */ + } + *strp = p; + return strlen(p); +} + char *join_path(const char *path, const char *name) { int lenp = strlen(path); |