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| author |   Angelos Mouzakitis <a.mouzakitis@virtualopensystems.com> | 2023-10-10 14:33:42 +0000 |
|---|---|---|
| committer | Angelos Mouzakitis <a.mouzakitis@virtualopensystems.com> | 2023-10-10 14:33:42 +0000 |
| commit | af1a266670d040d2f4083ff309d732d648afba2a (patch) | |
| tree | 2fc46203448ddcc6f81546d379abfaeb323575e9 /roms/ipxe/src/core/asprintf.c | |
| parent | e02cda008591317b1625707ff8e115a4841aa889 (diff) | |
Change-Id: Iaf8d18082d3991dec7c0ebbea540f092188eb4ec
Diffstat (limited to 'roms/ipxe/src/core/asprintf.c')
| -rw-r--r-- | roms/ipxe/src/core/asprintf.c | 49 |
1 files changed, 49 insertions, 0 deletions
diff --git a/roms/ipxe/src/core/asprintf.c b/roms/ipxe/src/core/asprintf.c new file mode 100644 index 000000000..00edf8e11 --- /dev/null +++ b/roms/ipxe/src/core/asprintf.c @@ -0,0 +1,49 @@ +#include <stdint.h> +#include <stddef.h> +#include <stdlib.h> +#include <stdio.h> +#include <errno.h> + +FILE_LICENCE ( GPL2_OR_LATER_OR_UBDL ); + +/** + * Write a formatted string to newly allocated memory. + * + * @v strp Pointer to hold allocated string + * @v fmt Format string + * @v args Arguments corresponding to the format string + * @ret len Length of formatted string + */ +int vasprintf ( char **strp, const char *fmt, va_list args ) { + size_t len; + va_list args_tmp; + + /* Calculate length needed for string */ + va_copy ( args_tmp, args ); + len = ( vsnprintf ( NULL, 0, fmt, args_tmp ) + 1 ); + va_end ( args_tmp ); + + /* Allocate and fill string */ + *strp = malloc ( len ); + if ( ! *strp ) + return -ENOMEM; + return vsnprintf ( *strp, len, fmt, args ); +} + +/** + * Write a formatted string to newly allocated memory. + * + * @v strp Pointer to hold allocated string + * @v fmt Format string + * @v ... Arguments corresponding to the format string + * @ret len Length of formatted string + */ +int asprintf ( char **strp, const char *fmt, ... ) { + va_list args; + int len; + + va_start ( args, fmt ); + len = vasprintf ( strp, fmt, args ); + va_end ( args ); + return len; +} |