mirror of
https://github.com/solemnwarning/ipxwrapper
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26f6511dee
It appears that some of the mswsock.dll functions get called on Windows 98 in a context where calling any of the printf functions provided by the CRT causes subtle memory corruption which doesn't manifest until the process exits, triggering a page fault in KERNEL32.DLL and making the system unusable. 1990s Windows makes me miss the sophistication of 1970s UNIX.
75 lines
2.2 KiB
C
75 lines
2.2 KiB
C
// Copyright (C) 2019 Miroslaw Toton, mirtoto@gmail.com
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#ifndef SNPRINTF_H_
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#define SNPRINTF_H_
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#include <stdarg.h>
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#include <stddef.h>
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#ifdef __cplusplus
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extern "C" {
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#endif
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/** @see snprintf() */
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int mirtoto_vsnprintf(char *string, size_t length, const char *format, va_list args) __attribute__((format(printf, 3, 0)));
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/**
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* Implementation of snprintf() function which create @p string of maximum
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* @p length - 1 according of instruction provided by @p format.
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*
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* # Supportted types
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*
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* Type | Description
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* -------- | ----------------------------------------
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* d / i | signed decimal integer
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* u | unsigned decimal integer
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* o | unsigned octal integer
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* x | unsigned hexadecimal integer
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* f / F | decimal floating point
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* e / E | scientific (exponential) floating point
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* g / G | scientific or decimal floating point
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* c | character
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* s | string
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* p | pointer
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* % | percent character
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*
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* # Supported lengths
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*
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* Length | Description
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* -------- | ----------------------------------------
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* hh | signed / unsigned char
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* h | signed / unsigned short
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* l | signed / unsigned long
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* ll | signed / unsigned long long
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*
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* # Supported flags
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*
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* Flag | Description
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* -------- | ----------------------------------------
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* - | justify left
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* + | justify right or put a plus if number
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* # | prefix 0x, 0X for hex and 0 for octal
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* * | width and/or precision is specified as an int argument
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* 0 | for number padding with zeros instead of spaces
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* (space) | leave a blank for number with no sign
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*
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* @param string Output buffer.
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* @param length Size of output buffer @p string.
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* @param format Format of input parameters.
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* @param ... Input parameters according of @p format.
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*
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* @retval >=0 Amount of characters put in @p string.
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* @retval -1 Output buffer size is too small.
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*/
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int mirtoto_snprintf(char *string, size_t length, const char *format, ...) __attribute__((format(printf, 3, 4)));
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#ifdef __cplusplus
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}
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#endif
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#endif // SNPRINTF_H_
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