sscanf.c revision 261363
1/* 2 * Copyright (c) 2000-2001 Proofpoint, Inc. and its suppliers. 3 * All rights reserved. 4 * Copyright (c) 1990, 1993 5 * The Regents of the University of California. All rights reserved. 6 * 7 * This code is derived from software contributed to Berkeley by 8 * Chris Torek. 9 * 10 * By using this file, you agree to the terms and conditions set 11 * forth in the LICENSE file which can be found at the top level of 12 * the sendmail distribution. 13 */ 14 15#include <sm/gen.h> 16SM_RCSID("@(#)$Id: sscanf.c,v 1.26 2013/11/22 20:51:43 ca Exp $") 17#include <string.h> 18#include <sm/varargs.h> 19#include <sm/io.h> 20#include "local.h" 21 22/* 23** SM_EOFREAD -- dummy read function for faked file below 24** 25** Parameters: 26** fp -- file pointer 27** buf -- location to place read data 28** len -- number of bytes to read 29** 30** Returns: 31** 0 (zero) always 32*/ 33 34static ssize_t 35sm_eofread __P(( 36 SM_FILE_T *fp, 37 char *buf, 38 size_t len)); 39 40/* ARGSUSED0 */ 41static ssize_t 42sm_eofread(fp, buf, len) 43 SM_FILE_T *fp; 44 char *buf; 45 size_t len; 46{ 47 return 0; 48} 49 50/* 51** SM_IO_SSCANF -- scan a string to find data units 52** 53** Parameters: 54** str -- strings containing data 55** fmt -- format directive for finding data units 56** ... -- memory locations to place format found data units 57** 58** Returns: 59** Failure: SM_IO_EOF 60** Success: number of data units found 61** 62** Side Effects: 63** Attempts to strlen() 'str'; if not a '\0' terminated string 64** then the call may SEGV/fail. 65** Faking the string 'str' as a file. 66*/ 67 68int 69#if SM_VA_STD 70sm_io_sscanf(const char *str, char const *fmt, ...) 71#else /* SM_VA_STD */ 72sm_io_sscanf(str, fmt, va_alist) 73 const char *str; 74 char *fmt; 75 va_dcl 76#endif /* SM_VA_STD */ 77{ 78 int ret; 79 SM_FILE_T fake; 80 SM_VA_LOCAL_DECL 81 82 fake.sm_magic = SmFileMagic; 83 fake.f_flags = SMRD; 84 fake.f_bf.smb_base = fake.f_p = (unsigned char *) str; 85 fake.f_bf.smb_size = fake.f_r = strlen(str); 86 fake.f_file = -1; 87 fake.f_read = sm_eofread; 88 fake.f_write = NULL; 89 fake.f_close = NULL; 90 fake.f_open = NULL; 91 fake.f_seek = NULL; 92 fake.f_setinfo = fake.f_getinfo = NULL; 93 fake.f_type = "sm_io_sscanf:fake"; 94 fake.f_flushfp = NULL; 95 fake.f_ub.smb_base = NULL; 96 fake.f_timeout = SM_TIME_FOREVER; 97 fake.f_timeoutstate = SM_TIME_BLOCK; 98 SM_VA_START(ap, fmt); 99 ret = sm_vfscanf(&fake, SM_TIME_FOREVER, fmt, ap); 100 SM_VA_END(ap); 101 return ret; 102} 103