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Diffstat (limited to 'extra/i2c_pseudo/anprintf.h')
| -rw-r--r-- | extra/i2c_pseudo/anprintf.h | 144 |
1 files changed, 0 insertions, 144 deletions
diff --git a/extra/i2c_pseudo/anprintf.h b/extra/i2c_pseudo/anprintf.h deleted file mode 100644 index c2d66c494b..0000000000 --- a/extra/i2c_pseudo/anprintf.h +++ /dev/null @@ -1,144 +0,0 @@ -// SPDX-License-Identifier: GPL-2.0 - -#include <stdarg.h> -#include <linux/export.h> -#include <linux/slab.h> -#include <linux/types.h> -#include <linux/string.h> - -/* - * vanprintf - Format a string and place it into a newly allocated buffer. - * @out: Address of the pointer to place the buffer address into. Will only be - * written to with a successful positive return value. - * @max_size: If non-negative, the maximum buffer size that this function will - * attempt to allocate. If the formatted string including trailing null - * character would not fit, no buffer will be allocated, and an error will - * be returned. (Thus max_size of 0 will always result in an error.) - * @gfp: GFP flags for kmalloc(). - * @fmt: The format string to use. - * @ap: Arguments for the format string. - * - * Return value meanings: - * - * >=0: A buffer of this size was allocated and its address written to *out. - * The caller now owns the buffer and is responsible for freeing it with - * kfree(). The final character in the buffer, not counted in this - * return value, is the trailing null. This is the same return value - * meaning as snprintf(3). - * - * <0: An error occurred. Negate the return value for the error number. - * @out will not have been written to. Errors that might come from - * snprintf(3) may come from this function as well. Additionally, the - * following errors may occur from this function: - * - * ERANGE: A buffer larger than @max_size would be needed to fit the - * formatted string including its trailing null character. - * - * ENOMEM: Allocation of the output buffer failed. - * - * ENOTRECOVERABLE: An unexpected condition occurred. This may indicate - * a bug. - */ -static ssize_t vanprintf(char **out, ssize_t max_size, gfp_t gfp, - const char *fmt, va_list ap) -{ - int ret; - ssize_t buf_size; - char *buf = NULL; - va_list args1; - - va_copy(args1, ap); - ret = vsnprintf(NULL, 0, fmt, ap); - if (ret < 0) { - pr_err("%s: Formatting failed with error %d.\n", __func__, - -ret); - goto fail_before_args1; - } - if (max_size >= 0 && ret > max_size) { - ret = -ERANGE; - goto fail_before_args1; - } - - buf_size = ret + 1; - buf = kmalloc(buf_size, gfp); - if (buf == NULL) { - pr_err("%s: kmalloc(%zd, %u) returned NULL\n", __func__, - buf_size, gfp); - ret = -ENOMEM; - goto fail_before_args1; - } - - ret = vsnprintf(buf, buf_size, fmt, args1); - va_end(args1); - if (ret < 0) { - pr_err("%s: Second formatting pass produced error %d after the first pass succeeded. This is a bug.\n", - __func__, -ret); - goto fail_after_args1; - } - if (ret + 1 != buf_size) { - pr_err("%s: Second formatting pass produced a different formatted output size than the first. This is a bug. Will return -ENOTRECOVERABLE. first_sans_null=%zd second_sans_null=%d\n", - __func__, buf_size - 1, ret); - ret = -ENOTRECOVERABLE; - goto fail_after_args1; - } - - *out = buf; - return ret; - - fail_before_args1: - va_end(args1); - fail_after_args1: - kfree(buf); - if (ret >= 0) { - pr_err("%s: Jumped to failure cleanup section with non-negative return value %d set. This is a bug. Will return -ENOTRECOVERABLE instead.\n", - __func__, ret); - ret = -ENOTRECOVERABLE; - } - return ret; -} - -/* - * anprintf - Format a string and place it into a newly allocated buffer. - * @out: Address of the pointer to place the buffer address into. Will only be - * written to with a successful positive return value. - * @max_size: If non-negative, the maximum buffer size that this function will - * attempt to allocate. If the formatted string including trailing null - * character would not fit, no buffer will be allocated, and an error will - * be returned. (Thus max_size of 0 will always result in an error.) - * @gfp: GFP flags for kmalloc(). - * @fmt: The format string to use. - * @...: Arguments for the format string. - * - * Return value meanings: - * - * >=0: A buffer of this size was allocated and its address written to *out. - * The caller now owns the buffer and is responsible for freeing it with - * kfree(). The final character in the buffer, not counted in this - * return value, is the trailing null. This is the same return value - * meaning as snprintf(3). - * - * <0: An error occurred. Negate the return value for the error number. - * @out will not have been written to. Errors that might come from - * snprintf(3) may come from this function as well. Additionally, the - * following errors may occur from this function: - * - * ERANGE: A buffer larger than @max_size would be needed to fit the - * formatted string including its trailing null character. - * - * ENOMEM: Allocation of the output buffer failed. - * - * ENOTRECOVERABLE: An unexpected condition occurred. This may indicate - * a bug. - */ -__attribute__((__format__(__printf__, 4, 5))) -static ssize_t anprintf(char **out, ssize_t max_size, gfp_t gfp, - const char *fmt, ...) -{ - ssize_t ret; - va_list args; - - va_start(args, fmt); - ret = vanprintf(out, max_size, gfp, fmt, args); - va_end(args); - return ret; -} |