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/* |
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* fptools.c, some helper functions for getcgi.c and uu(en|de)view |
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* |
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* Distributed under the terms of the GNU General Public License. |
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* Use and be happy. |
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*/ |
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|
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#ifdef HAVE_CONFIG_H |
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#include "config.h" |
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#endif |
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|
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#ifdef SYSTEM_WINDLL |
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#include <windows.h> |
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#endif |
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#ifdef SYSTEM_OS2 |
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#include <os2.h> |
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#endif |
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|
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/* |
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* This file provides replacements for some handy functions that aren't |
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* available on all systems, like most of the <string.h> functions. They |
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* should behave exactly as their counterparts. There are also extensions |
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* that aren't portable at all (like strirstr etc.). |
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* The proper behaviour in a configure script is as follows: |
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* AC_CHECK_FUNC(strrchr,AC_DEFINE(strrchr,FP_strrchr)) |
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* This way, the (probably less efficient) replacements will only be used |
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* where it is not provided by the default libraries. Be aware that this |
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* does not work with replacements that just shadow wrong behaviour (like |
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* FP_free) or provide extended functionality (FP_gets). |
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* The above is not used in the uuenview/uudeview configuration script, |
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* since both only use the replacement functions in non-performance-cri- |
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* tical sections (except for FP_tempnam and FP_strerror, where some |
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* functionality of the original would be lost). |
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*/ |
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|
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#include <stdio.h> |
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#include <ctype.h> |
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#include <stdlib.h> |
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#include <string.h> |
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|
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#ifdef HAVE_UNISTD_H |
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#include <unistd.h> |
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#endif |
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|
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#include <fptools.h> |
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|
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#if 0 |
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#ifdef SYSTEM_WINDLL |
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BOOL _export WINAPI |
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DllEntryPoint (HINSTANCE hInstance, DWORD seginfo, |
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LPVOID lpCmdLine) |
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{ |
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/* Don't do anything, so just return true */ |
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return TRUE; |
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} |
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#endif |
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#endif |
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|
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/* |
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* some versions of free can't handle a NULL pointer properly |
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* (ANSI says, free ignores a NULL pointer, but some machines |
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* prefer to SIGSEGV on it) |
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*/ |
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|
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void TOOLEXPORT |
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FP_free (void *ptr) |
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{ |
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if (ptr) free (ptr); |
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} |
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|
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/* |
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* This is non-standard, so I'm defining my own |
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*/ |
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|
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char * TOOLEXPORT |
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FP_strdup (char *string) |
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{ |
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char *result; |
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|
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if (string == NULL) |
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return NULL; |
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|
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if ((result = (char *) malloc (strlen (string) + 1)) == NULL) |
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return NULL; |
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|
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strcpy (result, string); |
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return result; |
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} |
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|
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/* |
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* limited-length string copy. this function behaves differently from |
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* the original in that the dest string is always terminated with a |
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* NULL character. |
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*/ |
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|
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char * TOOLEXPORT |
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FP_strncpy (char *dest, char *src, int length) |
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{ |
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char *odest=dest; |
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if (src == NULL || dest == NULL || length-- <= 0) |
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return dest; |
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|
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while (length-- && *src) |
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*dest++ = *src++; |
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|
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*dest++ = '\0'; |
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return odest; |
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} |
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|
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/* |
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* duplicate a memory area |
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*/ |
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|
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void * TOOLEXPORT |
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FP_memdup (const void *ptr, int len) |
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{ |
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void *result; |
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|
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if (ptr == NULL) |
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return NULL; |
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|
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if ((result = malloc (len)) == NULL) |
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return NULL; |
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|
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memcpy (result, ptr, len); |
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return result; |
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} |
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|
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/* |
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* case-insensitive compare |
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*/ |
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|
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#ifndef FP_stricmp |
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int TOOLEXPORT |
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FP_stricmp (const char *str1, const char *str2) |
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{ |
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if (str1==NULL || str2==NULL) |
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return -1; |
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|
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while (*str1) { |
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if (tolower(*str1) != tolower(*str2)) |
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break; |
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str1++; |
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str2++; |
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} |
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return (tolower (*str1) - tolower (*str2)); |
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} |
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#endif |
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|
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#ifndef FP_strnicmp |
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int TOOLEXPORT |
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FP_strnicmp (const char *str1, const char *str2, int count) |
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{ |
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int d; |
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|
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if (!str1 || !str2) |
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return -1; |
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|
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while (count--) { |
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if (!*str1) |
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return -1; |
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|
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d = tolower (*str1) - tolower (*str2); |
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if (d) |
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return d; |
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|
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str1++; |
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str2++; |
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} |
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|
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return 0; |
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} |
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#endif |
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|
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int TOOLEXPORT |
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FP_strnicmp_fast (const char *str1, const char *str2, int count) |
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{ |
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if (!str1 || !str2) |
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return -1; |
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|
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while (count--) { |
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if (!*str1) |
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return -1; |
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|
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if ((*str1 ^ *str2) & 0xdf) |
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return (*str1 & 0xdf) - (*str2 & 0xdf); |
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|
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str1++; |
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str2++; |
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} |
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|
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return 0; |
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} |
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|
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char * TOOLEXPORT |
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FP_strpbrk (char *str, char *accept) |
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{ |
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char *ptr; |
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|
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if (str == NULL) |
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return NULL; |
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if (accept == NULL || *accept == '\0') |
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return str; |
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|
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for (; *str; str++) |
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for (ptr=accept; *ptr; ptr++) |
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if (*str == *ptr) |
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return str; |
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|
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return NULL; |
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} |
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|
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/* |
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* autoconf also complains about this one |
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*/ |
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|
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char * TOOLEXPORT |
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FP_strtok (char *str1, char *str2) |
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{ |
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static char *optr; |
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char *ptr; |
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|
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if (str2 == NULL) |
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return NULL; |
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|
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if (str1) { |
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optr = str1; |
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} |
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else { |
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if (*optr == '\0') |
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return NULL; |
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} |
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|
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while (*optr && strchr (str2, *optr)) /* look for beginning of token */ |
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optr++; |
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|
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if (*optr == '\0') /* no token found */ |
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return NULL; |
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|
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ptr = optr; |
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while (*optr && strchr (str2, *optr) == NULL) /* look for end of token */ |
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optr++; |
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|
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if (*optr) { |
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*optr++ = '\0'; |
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} |
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return ptr; |
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} |
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|
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/* |
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* case insensitive strstr. |
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*/ |
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|
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#ifndef FP_stristr |
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char * TOOLEXPORT |
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FP_stristr (char *str1, char *str2) |
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{ |
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char *ptr1, *ptr2; |
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|
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if (str1==NULL) |
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return NULL; |
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if (str2==NULL) |
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return str1; |
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|
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while (*(ptr1=str1)) { |
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for (ptr2=str2; |
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*ptr1 && *ptr2 && tolower(*ptr1)==tolower(*ptr2); |
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ptr1++, ptr2++) |
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/* empty loop */ ; |
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|
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if (*ptr2 == '\0') |
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return str1; |
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str1++; |
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} |
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return NULL; |
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} |
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#endif |
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|
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/* |
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* Nice fake of the real (non-standard) one |
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*/ |
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|
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char * TOOLEXPORT |
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FP_strrstr (const char *ptr, const char *str) |
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{ |
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const char *found=NULL, *new, *iter=ptr; |
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|
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if (ptr==NULL || str==NULL) |
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return NULL; |
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|
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if (*str == '\0') |
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return (char *)ptr; |
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|
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while ((new = FP_strstr (iter, str)) != NULL) { |
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found = new; |
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iter = new + 1; |
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} |
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|
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return (char *)found; |
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} |
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|
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char * TOOLEXPORT |
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FP_strirstr (char *ptr, char *str) |
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{ |
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char *found=NULL, *iter=ptr, *new; |
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|
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if (ptr==NULL || str==NULL) |
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return NULL; |
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if (*str == '\0') |
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return ptr; |
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|
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while ((new = FP_stristr (iter, str)) != NULL) { |
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found = new; |
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iter = new + 1; |
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} |
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return found; |
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} |
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|
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/* |
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* convert whole string to case |
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*/ |
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|
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char * TOOLEXPORT |
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FP_stoupper (char *input) |
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{ |
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char *iter = input; |
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|
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if (input == NULL) |
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return NULL; |
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|
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while (*iter) { |
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*iter = toupper (*iter); |
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iter++; |
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} |
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return input; |
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} |
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|
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char * TOOLEXPORT |
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FP_stolower (char *input) |
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{ |
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char *iter = input; |
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|
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if (input == NULL) |
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return NULL; |
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|
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while (*iter) { |
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*iter = tolower (*iter); |
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iter++; |
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} |
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return input; |
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} |
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|
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/* |
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* string matching with wildcards |
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*/ |
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|
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int TOOLEXPORT |
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FP_strmatch (char *string, char *pattern) |
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{ |
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char *p1 = string, *p2 = pattern; |
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|
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if (pattern==NULL || string==NULL) |
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return 0; |
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|
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while (*p1 && *p2) { |
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if (*p2 == '?') { |
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p1++; p2++; |
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} |
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else if (*p2 == '*') { |
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if (*++p2 == '\0') |
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return 1; |
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while (*p1 && *p1 != *p2) |
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p1++; |
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} |
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else if (*p1 == *p2) { |
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p1++; p2++; |
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} |
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else |
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return 0; |
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} |
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if (*p1 || *p2) |
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return 0; |
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|
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return 1; |
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} |
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|
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char * TOOLEXPORT |
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FP_strrchr (const char *string, int tc) |
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{ |
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const char *ptr; |
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|
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if (string == NULL || !*string) |
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return NULL; |
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|
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ptr = string + strlen (string) - 1; |
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|
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while (ptr != string && *ptr != tc) |
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ptr--; |
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|
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if (*ptr == tc) |
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return (char *)ptr; |
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|
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return NULL; |
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} |
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|
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/* |
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* strip directory information from a filename. Works only on DOS and |
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* Unix systems so far ... |
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*/ |
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|
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char * TOOLEXPORT |
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FP_cutdir (char *filename) |
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{ |
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char *ptr; |
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|
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if (filename == NULL) |
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return NULL; |
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|
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if ((ptr = FP_strrchr (filename, '/')) != NULL) |
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ptr++; |
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else if ((ptr = FP_strrchr (filename, '\\')) != NULL) |
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ptr++; |
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else |
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ptr = filename; |
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|
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return ptr; |
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} |
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|
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/* |
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* My own fgets function. It handles all kinds of line terminators |
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* properly: LF (Unix), CRLF (DOS) and CR (Mac). |
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*/ |
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/* (schmorp) the buffer is always written to, and no LF is stored at the end */ |
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/* also, if the buffer is too short, the remaining line is skipped */ |
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ecb_hot char * TOOLEXPORT |
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FP_fgets (char *buf, int n, FILE *stream) |
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{ |
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char *ptr = buf; |
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char *end = buf + n - 1; |
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|
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/* shield against buffer overflows caused by "255 - bytes_left"-kind of bugs when bytes_left > 255 */ |
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if (n <= 0) |
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return 0; |
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|
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for (;;) |
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{ |
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int c = FP_getc (stream); |
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|
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if (ecb_expect_false (c <= '\015')) /* EOF is < 0x20, too */ |
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{ |
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/* ctlchar */ |
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|
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if (c == '\012') |
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/* LF, nothing following */ |
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break; |
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else if (c == '\015') |
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{ |
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/* CR, possibly CRLF, skip following LF */ |
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c = FP_getc (stream); |
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|
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if (c != '\012') /* CR LF? */ |
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ungetc (c, stream); |
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|
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break; |
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} |
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else if (c == EOF) |
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{ |
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*ptr = 0; |
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return 0; |
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} |
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} |
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|
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*ptr = c; |
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ptr += ptr < end; /* this is hopefully branch-free, and fast */ |
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} |
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|
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*ptr = 0; |
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return buf; |
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} |
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|