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Diffstat (limited to 'private/crt32/stdio/vsprintf.c')
| -rw-r--r-- | private/crt32/stdio/vsprintf.c | 126 |
1 files changed, 126 insertions, 0 deletions
diff --git a/private/crt32/stdio/vsprintf.c b/private/crt32/stdio/vsprintf.c new file mode 100644 index 000000000..e19ee5064 --- /dev/null +++ b/private/crt32/stdio/vsprintf.c @@ -0,0 +1,126 @@ +/*** +*vsprintf.c - print formatted data into a string from var arg list +* +* Copyright (c) 1985-1991, Microsoft Corporation. All rights reserved. +* +*Purpose: +* defines vsprintf() and _vsnprintf() - print formatted output to +* a string, get the data from an argument ptr instead of explicit +* arguments. +* +*Revision History: +* 09-02-83 RN original sprintf +* 06-17-85 TC rewrote to use new varargs macros, and to be vsprintf +* 04-13-87 JCR added const to declaration +* 11-07-87 JCR Multi-thread support +* 12-11-87 JCR Added "_LOAD_DS" to declaration +* 05-27-88 PHG Merged DLL and normal versions +* 06-13-88 JCR Fake _iob entry is now static so that other routines +* can assume _iob entries are in DGROUP. +* 08-25-88 GJF Define MAXSTR to be INT_MAX (from LIMITS.H). +* 06-06-89 JCR 386 mthread support +* 08-18-89 GJF Clean up, now specific to OS/2 2.0 (i.e., 386 flat +* model). Also fixed copyright and indents. +* 02-16-90 GJF Fixed copyright +* 03-20-90 GJF Made calling type _CALLTYPE1, added #include +* <cruntime.h> and removed #include <register.h>. +* 07-25-90 SBM Replaced <assertm.h> by <assert.h>, <varargs.h> by +* <stdarg.h> +* 10-03-90 GJF New-style function declarator. +* 09-24-91 JCR Added _vsnprintf() +* +*******************************************************************************/ + +#include <cruntime.h> +#include <stdio.h> +#include <assert.h> +#include <stdarg.h> +#include <internal.h> +#include <limits.h> +#include <os2dll.h> + +#define MAXSTR INT_MAX + + +/*** +#ifndef _COUNT_ +*int vsprintf(string, format, ap) - print formatted data to string from arg ptr +#else +*int _vsnprintf(string, format, ap) - print formatted data to string from arg ptr +#endif +* +*Purpose: +* Prints formatted data, but to a string and gets data from an argument +* pointer. +* Sets up a FILE so file i/o operations can be used, make string look +* like a huge buffer to it, but _flsbuf will refuse to flush it if it +* fills up. Appends '\0' to make it a true string. +* +* Allocate the 'fake' _iob[] entryit statically instead of on +* the stack so that other routines can assume that _iob[] entries are in +* are in DGROUP and, thus, are near. +* +#ifdef _COUNT_ +* The _vsnprintf() flavor takes a count argument that is +* the max number of bytes that should be written to the +* user's buffer. +#endif +* +* Multi-thread: (1) Since there is no stream, this routine must never try +* to get the stream lock (i.e., there is no stream lock either). (2) +* Also, since there is only one staticly allocated 'fake' iob, we must +* lock/unlock to prevent collisions. +* +*Entry: +* char *string - place to put destination string +#ifdef _COUNT_ +* size_t count - max number of bytes to put in buffer +#endif +* char *format - format string, describes format of data +* va_list ap - varargs argument pointer +* +*Exit: +* returns number of characters in string +* +*Exceptions: +* +*******************************************************************************/ + +#ifndef _COUNT_ + +int _CALLTYPE1 vsprintf ( + char *string, + const char *format, + va_list ap + ) +#else + +int _CALLTYPE1 _vsnprintf ( + char *string, + size_t count, + const char *format, + va_list ap + ) +#endif + +{ + FILE str; + REG1 FILE *outfile = &str; + REG2 int retval; + + assert(string != NULL); + assert(format != NULL); + + outfile->_flag = _IOWRT|_IOSTRG; + outfile->_ptr = outfile->_base = string; +#ifndef _COUNT_ + outfile->_cnt = MAXSTR; +#else + outfile->_cnt = count; +#endif + + retval = _output(outfile,format,ap ); + _putc_lk('\0',outfile); + + return(retval); +} |