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c8955c078a
Cf. <https://github.com/php/php-src/pull/10220#issuecomment-1383739816>. This reverts commitecc880f491. This reverts commit588a07f737. This reverts commitf377e15751. This reverts commitb4ba16fe18. This reverts commit694ec1deea. This reverts commit6b34de8eba. This reverts commitaa1cd02a43. This reverts commit308fd311ea. This reverts commit16203b53e1. This reverts commit738fb5ca54. This reverts commit9fdbefacd3. This reverts commitcd4a7c1d90. This reverts commit928685eba2. This reverts commit01e5ffc85c.
137 lines
5.6 KiB
C
137 lines
5.6 KiB
C
/*
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+----------------------------------------------------------------------+
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| Copyright (c) The PHP Group |
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+----------------------------------------------------------------------+
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| This source file is subject to version 3.01 of the PHP license, |
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| that is bundled with this package in the file LICENSE, and is |
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| available through the world-wide-web at the following url: |
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| https://www.php.net/license/3_01.txt |
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| If you did not receive a copy of the PHP license and are unable to |
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| obtain it through the world-wide-web, please send a note to |
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| license@php.net so we can mail you a copy immediately. |
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+----------------------------------------------------------------------+
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| Author: Stig Sæther Bakken <ssb@php.net> |
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| Marcus Boerger <helly@php.net> |
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+----------------------------------------------------------------------+
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*/
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/*
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Comparing: sprintf, snprintf, slprintf, spprintf
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sprintf offers the ability to make a lot of failures since it does not know
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the size of the buffer it uses. Therefore usage of sprintf often
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results in possible entries for buffer overrun attacks. So please
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use this version only if you are sure the call is safe. sprintf
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always terminates the buffer it writes to.
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snprintf knows the buffers size and will not write behind it. But you will
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have to use either a static buffer or allocate a dynamic buffer
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before being able to call the function. In other words you must
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be sure that you really know the maximum size of the buffer required.
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A bad thing is having a big maximum while in most cases you would
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only need a small buffer. If the size of the resulting string is
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longer or equal to the buffer size than the buffer is not terminated.
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The function also returns the number of chars not including the
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terminating \0 that were needed to fully comply to the print request.
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slprintf same as snprintf with the difference that it actually returns the
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length printed not including the terminating \0.
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spprintf is the dynamical version of snprintf. It allocates the buffer in size
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as needed and allows a maximum setting as snprintf (turn this feature
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off by setting max_len to 0). spprintf is a little bit slower than
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snprintf and offers possible memory leaks if you miss freeing the
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buffer allocated by the function. Therefore this function should be
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used where either no maximum is known or the maximum is much bigger
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than normal size required. spprintf always terminates the buffer.
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Example:
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#define MAX 1024 | #define MAX 1024 | #define MAX 1024
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char buffer[MAX] | char buffer[MAX] | char *buffer;
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| |
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| | // No need to initialize buffer:
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| | // spprintf ignores value of buffer
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sprintf(buffer, "test"); | snprintf(buffer, MAX, "test"); | spprintf(&buffer, MAX, "text");
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| | if (!buffer)
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| | return OUT_OF_MEMORY
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// sprintf always terminates | // manual termination of | // spprintf allays terminates buffer
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// buffer | // buffer *IS* required |
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| buffer[MAX-1] = 0; |
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action_with_buffer(buffer); | action_with_buffer(buffer); | action_with_buffer(buffer);
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| | efree(buffer);
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*/
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#ifndef SNPRINTF_H
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#define SNPRINTF_H
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#include <stdbool.h>
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BEGIN_EXTERN_C()
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PHPAPI int ap_php_slprintf(char *buf, size_t len, const char *format,...) ZEND_ATTRIBUTE_FORMAT(printf, 3, 4);
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PHPAPI int ap_php_vslprintf(char *buf, size_t len, const char *format, va_list ap);
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PHPAPI int ap_php_snprintf(char *, size_t, const char *, ...) ZEND_ATTRIBUTE_FORMAT(printf, 3, 4);
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PHPAPI int ap_php_vsnprintf(char *, size_t, const char *, va_list ap);
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PHPAPI int ap_php_vasprintf(char **buf, const char *format, va_list ap);
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PHPAPI int ap_php_asprintf(char **buf, const char *format, ...) ZEND_ATTRIBUTE_FORMAT(printf, 2, 3);
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PHPAPI char * php_0cvt(double value, int ndigit, char dec_point, char exponent, char *buf);
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PHPAPI char * php_conv_fp(char format, double num,
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bool add_dp, int precision, char dec_point, bool * is_negative, char *buf, size_t *len);
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END_EXTERN_C()
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#define php_gcvt zend_gcvt
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#ifdef slprintf
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#undef slprintf
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#endif
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#define slprintf ap_php_slprintf
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#ifdef vslprintf
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#undef vslprintf
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#endif
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#define vslprintf ap_php_vslprintf
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#ifdef snprintf
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#undef snprintf
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#endif
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#define snprintf ap_php_snprintf
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#ifdef vsnprintf
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#undef vsnprintf
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#endif
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#define vsnprintf ap_php_vsnprintf
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#ifndef HAVE_VASPRINTF
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#define vasprintf ap_php_vasprintf
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#endif
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#ifndef HAVE_ASPRINTF
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#define asprintf ap_php_asprintf
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#endif
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typedef enum {
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LM_STD = 0,
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#if SIZEOF_INTMAX_T
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LM_INTMAX_T,
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#endif
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#if SIZEOF_PTRDIFF_T
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LM_PTRDIFF_T,
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#endif
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#if SIZEOF_LONG_LONG
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LM_LONG_LONG,
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#endif
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LM_SIZE_T,
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LM_LONG,
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LM_LONG_DOUBLE,
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} length_modifier_e;
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PHPAPI char * ap_php_conv_10(int64_t num, bool is_unsigned,
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bool * is_negative, char *buf_end, size_t *len);
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PHPAPI char * ap_php_conv_p2(uint64_t num, int nbits,
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char format, char *buf_end, size_t *len);
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#endif /* SNPRINTF_H */
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