# HG changeset patch # User GP Orcullo # Date 1667986199 -28800 # Node ID 296e459efdfbac08a46fbed25d077a2c226e99f0 # Parent a26453d1c54d0fdd8558dcdac626e116a927bf0f Preliminary OSX support diff -r a26453d1c54d -r 296e459efdfb ProjectController.py --- a/ProjectController.py Wed Nov 09 10:59:00 2022 +0800 +++ b/ProjectController.py Wed Nov 09 17:29:59 2022 +0800 @@ -370,6 +370,8 @@ def GetDefaultTargetName(self): if wx.Platform == '__WXMSW__': return "Win32" + elif wx.Platform == '__WXMAC__': + return "OSX" else: return "Linux" diff -r a26453d1c54d -r 296e459efdfb targets/OSX/XSD --- /dev/null Thu Jan 01 00:00:00 1970 +0000 +++ b/targets/OSX/XSD Wed Nov 09 17:29:59 2022 +0800 @@ -0,0 +1,6 @@ + + + + %(toolchain_gcc)s + + diff -r a26453d1c54d -r 296e459efdfb targets/OSX/__init__.py --- /dev/null Thu Jan 01 00:00:00 1970 +0000 +++ b/targets/OSX/__init__.py Wed Nov 09 17:29:59 2022 +0800 @@ -0,0 +1,40 @@ +#!/usr/bin/env python +# -*- coding: utf-8 -*- + +# This file is part of Beremiz, a Integrated Development Environment for +# programming IEC 61131-3 automates supporting plcopen standard and CanFestival. +# +# Copyright (C) 2007: Edouard TISSERANT and Laurent BESSARD +# +# See COPYING file for copyrights details. +# +# This program is free software; you can redistribute it and/or +# modify it under the terms of the GNU General Public License +# as published by the Free Software Foundation; either version 2 +# of the License, or (at your option) any later version. +# +# This program is distributed in the hope that it will be useful, +# but WITHOUT ANY WARRANTY; without even the implied warranty of +# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the +# GNU General Public License for more details. +# +# You should have received a copy of the GNU General Public License +# along with this program; if not, write to the Free Software +# Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA. + + + +from ..toolchain_gcc import toolchain_gcc + + +class OSX_target(toolchain_gcc): + dlopen_prefix = "./" + extension = ".dynlib" + + def getBuilderCFLAGS(self): + return toolchain_gcc.getBuilderCFLAGS(self) + \ + ["-fPIC", "-Wno-deprecated-declarations", + "-Wno-parentheses-equality", "-Wno-varargs"] + + def getBuilderLDFLAGS(self): + return toolchain_gcc.getBuilderLDFLAGS(self) + ["-shared"] diff -r a26453d1c54d -r 296e459efdfb targets/OSX/plc_OSX_main.c --- /dev/null Thu Jan 01 00:00:00 1970 +0000 +++ b/targets/OSX/plc_OSX_main.c Wed Nov 09 17:29:59 2022 +0800 @@ -0,0 +1,295 @@ +/** + * Mac OSX specific code + **/ + +#include +#include +#include +#include +#include +#include +#include +#include +#include + +static sem_t Run_PLC; + +long AtomicCompareExchange(long *atomicvar, long compared, long exchange) +{ + return __sync_val_compare_and_swap(atomicvar, compared, exchange); +} + +long long AtomicCompareExchange64(long long *atomicvar, long long compared, + long long exchange) +{ + return __sync_val_compare_and_swap(atomicvar, compared, exchange); +} + +void PLC_GetTime(IEC_TIME * CURRENT_TIME) +{ + struct timespec tmp; + clock_gettime(CLOCK_REALTIME, &tmp); + CURRENT_TIME->tv_sec = tmp.tv_sec; + CURRENT_TIME->tv_nsec = tmp.tv_nsec; +} + +dispatch_queue_t queue; +dispatch_source_t PLC_timer; + +static inline void PLC_timer_cancel(void *arg) +{ + dispatch_release(PLC_timer); + dispatch_release(queue); + exit(0); +} + +static inline void PLC_timer_notify(void *arg) +{ + PLC_GetTime(&__CURRENT_TIME); + sem_post(&Run_PLC); +} + +void PLC_SetTimer(unsigned long long next, unsigned long long period) +{ + if (next == period && next == 0) { + dispatch_suspend(PLC_timer); + } else { + dispatch_time_t start; + start = dispatch_time(DISPATCH_TIME_NOW, next); + dispatch_source_set_timer(PLC_timer, start, period, 0); + dispatch_resume(PLC_timer); + } +} + +void catch_signal(int sig) +{ + signal(SIGINT, catch_signal); + printf("Got Signal %d\n", sig); + dispatch_source_cancel(PLC_timer); + exit(0); +} + +static unsigned long __debug_tick; + +pthread_t PLC_thread; +static pthread_mutex_t python_wait_mutex = PTHREAD_MUTEX_INITIALIZER; +static pthread_mutex_t python_mutex = PTHREAD_MUTEX_INITIALIZER; +static pthread_mutex_t debug_wait_mutex = PTHREAD_MUTEX_INITIALIZER; +static pthread_mutex_t debug_mutex = PTHREAD_MUTEX_INITIALIZER; + +int PLC_shutdown = 0; + +int ForceSaveRetainReq(void) +{ + return PLC_shutdown; +} + +void PLC_thread_proc(void *arg) +{ + while (!PLC_shutdown) { + sem_wait(&Run_PLC); + __run(); + } + pthread_exit(0); +} + +#define maxval(a,b) ((a>b)?a:b) +int startPLC(int argc, char **argv) +{ + setlocale(LC_NUMERIC, "C"); + + PLC_shutdown = 0; + + sem_init(&Run_PLC, 0, 0); + + pthread_create(&PLC_thread, NULL, (void *)&PLC_thread_proc, NULL); + + pthread_mutex_init(&debug_wait_mutex, NULL); + pthread_mutex_init(&debug_mutex, NULL); + pthread_mutex_init(&python_wait_mutex, NULL); + pthread_mutex_init(&python_mutex, NULL); + + pthread_mutex_lock(&debug_wait_mutex); + pthread_mutex_lock(&python_wait_mutex); + + queue = dispatch_queue_create("timerQueue", 0); + PLC_timer = dispatch_source_create(DISPATCH_SOURCE_TYPE_TIMER, 0, 0, queue); + + dispatch_set_context(PLC_timer, &PLC_timer); + dispatch_source_set_event_handler_f(PLC_timer, PLC_timer_notify); + dispatch_source_set_cancel_handler_f(PLC_timer, PLC_timer_cancel); + + if (__init(argc, argv) == 0) { + PLC_SetTimer(common_ticktime__, common_ticktime__); + + /* install signal handler for manual break */ + signal(SIGINT, catch_signal); + } else { + return 1; + } + return 0; +} + +int TryEnterDebugSection(void) +{ + if (pthread_mutex_trylock(&debug_mutex) == 0) { + /* Only enter if debug active */ + if (__DEBUG) { + return 1; + } + pthread_mutex_unlock(&debug_mutex); + } + return 0; +} + +void LeaveDebugSection(void) +{ + pthread_mutex_unlock(&debug_mutex); +} + +int stopPLC() +{ + /* Stop the PLC */ + PLC_shutdown = 1; + sem_post(&Run_PLC); + PLC_SetTimer(0, 0); + pthread_join(PLC_thread, NULL); + sem_destroy(&Run_PLC); + dispatch_source_cancel(PLC_timer); + __cleanup(); + pthread_mutex_destroy(&debug_wait_mutex); + pthread_mutex_destroy(&debug_mutex); + pthread_mutex_destroy(&python_wait_mutex); + pthread_mutex_destroy(&python_mutex); + return 0; +} + +extern unsigned long __tick; + +int WaitDebugData(unsigned long *tick) +{ + int res; + if (PLC_shutdown) + return 1; + /* Wait signal from PLC thread */ + res = pthread_mutex_lock(&debug_wait_mutex); + *tick = __debug_tick; + return res; +} + +/* Called by PLC thread when debug_publish finished + * This is supposed to unlock debugger thread in WaitDebugData*/ +void InitiateDebugTransfer() +{ + /* remember tick */ + __debug_tick = __tick; + /* signal debugger thread it can read data */ + pthread_mutex_unlock(&debug_wait_mutex); +} + +int suspendDebug(int disable) +{ + /* Prevent PLC to enter debug code */ + pthread_mutex_lock(&debug_mutex); + /*__DEBUG is protected by this mutex */ + __DEBUG = !disable; + if (disable) + pthread_mutex_unlock(&debug_mutex); + return 0; +} + +void resumeDebug(void) +{ + __DEBUG = 1; + /* Let PLC enter debug code */ + pthread_mutex_unlock(&debug_mutex); +} + +/* from plc_python.c */ +int WaitPythonCommands(void) +{ + /* Wait signal from PLC thread */ + return pthread_mutex_lock(&python_wait_mutex); +} + +/* Called by PLC thread on each new python command*/ +void UnBlockPythonCommands(void) +{ + /* signal python thread it can read data */ + pthread_mutex_unlock(&python_wait_mutex); +} + +int TryLockPython(void) +{ + return pthread_mutex_trylock(&python_mutex) == 0; +} + +void UnLockPython(void) +{ + pthread_mutex_unlock(&python_mutex); +} + +void LockPython(void) +{ + pthread_mutex_lock(&python_mutex); +} + +struct RT_to_nRT_signal_s { + pthread_cond_t WakeCond; + pthread_mutex_t WakeCondLock; +}; + +typedef struct RT_to_nRT_signal_s RT_to_nRT_signal_t; + +#define _LogAndReturnNull(text) \ + {\ + char mstr[256] = text " for ";\ + strncat(mstr, name, 255);\ + LogMessage(LOG_CRITICAL, mstr, strlen(mstr));\ + return NULL;\ + } + +void *create_RT_to_nRT_signal(char *name) +{ + RT_to_nRT_signal_t *sig = + (RT_to_nRT_signal_t *) malloc(sizeof(RT_to_nRT_signal_t)); + + if (!sig) + _LogAndReturnNull("Failed allocating memory for RT_to_nRT signal"); + + pthread_cond_init(&sig->WakeCond, NULL); + pthread_mutex_init(&sig->WakeCondLock, NULL); + + return (void *)sig; +} + +void delete_RT_to_nRT_signal(void *handle) +{ + RT_to_nRT_signal_t *sig = (RT_to_nRT_signal_t *) handle; + + pthread_cond_destroy(&sig->WakeCond); + pthread_mutex_destroy(&sig->WakeCondLock); + + free(sig); +} + +int wait_RT_to_nRT_signal(void *handle) +{ + int ret; + RT_to_nRT_signal_t *sig = (RT_to_nRT_signal_t *) handle; + pthread_mutex_lock(&sig->WakeCondLock); + ret = pthread_cond_wait(&sig->WakeCond, &sig->WakeCondLock); + pthread_mutex_unlock(&sig->WakeCondLock); + return ret; +} + +int unblock_RT_to_nRT_signal(void *handle) +{ + RT_to_nRT_signal_t *sig = (RT_to_nRT_signal_t *) handle; + return pthread_cond_signal(&sig->WakeCond); +} + +void nRT_reschedule(void) +{ + sched_yield(); +} diff -r a26453d1c54d -r 296e459efdfb targets/OSX/plc_OSX_main_retain.c --- /dev/null Thu Jan 01 00:00:00 1970 +0000 +++ b/targets/OSX/plc_OSX_main_retain.c Wed Nov 09 17:29:59 2022 +0800 @@ -0,0 +1,352 @@ +/* + This file is part of Beremiz, a Integrated Development Environment for + programming IEC 61131-3 automates supporting plcopen standard and CanFestival. + + See COPYING.runtime + + Copyright (C) 2018: Sergey Surkov + Copyright (C) 2018: Andrey Skvortsov + +*/ + +#ifndef HAVE_RETAIN +#include +#include +#include +#include "iec_types.h" + +int GetRetainSize(void); + +/* Retain buffer. */ +FILE *retain_buffer; +const char rb_file[] = "retain_buffer_file"; +const char rb_file_bckp[] = "retain_buffer_file.bak"; + +/* Retain header struct. */ +struct retain_info_t { + uint32_t retain_size; + uint32_t hash_size; + uint8_t *hash; + uint32_t header_offset; + uint32_t header_crc; +}; + +/* Init retain info structure. */ +struct retain_info_t retain_info; + +/* CRC lookup table and initial state. */ +static const uint32_t crc32_table[256] = { + 0x00000000, 0x77073096, 0xEE0E612C, 0x990951BA, 0x076DC419, 0x706AF48F, + 0xE963A535, 0x9E6495A3, + 0x0EDB8832, 0x79DCB8A4, 0xE0D5E91E, 0x97D2D988, 0x09B64C2B, 0x7EB17CBD, + 0xE7B82D07, 0x90BF1D91, + 0x1DB71064, 0x6AB020F2, 0xF3B97148, 0x84BE41DE, 0x1ADAD47D, 0x6DDDE4EB, + 0xF4D4B551, 0x83D385C7, + 0x136C9856, 0x646BA8C0, 0xFD62F97A, 0x8A65C9EC, 0x14015C4F, 0x63066CD9, + 0xFA0F3D63, 0x8D080DF5, + 0x3B6E20C8, 0x4C69105E, 0xD56041E4, 0xA2677172, 0x3C03E4D1, 0x4B04D447, + 0xD20D85FD, 0xA50AB56B, + 0x35B5A8FA, 0x42B2986C, 0xDBBBC9D6, 0xACBCF940, 0x32D86CE3, 0x45DF5C75, + 0xDCD60DCF, 0xABD13D59, + 0x26D930AC, 0x51DE003A, 0xC8D75180, 0xBFD06116, 0x21B4F4B5, 0x56B3C423, + 0xCFBA9599, 0xB8BDA50F, + 0x2802B89E, 0x5F058808, 0xC60CD9B2, 0xB10BE924, 0x2F6F7C87, 0x58684C11, + 0xC1611DAB, 0xB6662D3D, + 0x76DC4190, 0x01DB7106, 0x98D220BC, 0xEFD5102A, 0x71B18589, 0x06B6B51F, + 0x9FBFE4A5, 0xE8B8D433, + 0x7807C9A2, 0x0F00F934, 0x9609A88E, 0xE10E9818, 0x7F6A0DBB, 0x086D3D2D, + 0x91646C97, 0xE6635C01, + 0x6B6B51F4, 0x1C6C6162, 0x856530D8, 0xF262004E, 0x6C0695ED, 0x1B01A57B, + 0x8208F4C1, 0xF50FC457, + 0x65B0D9C6, 0x12B7E950, 0x8BBEB8EA, 0xFCB9887C, 0x62DD1DDF, 0x15DA2D49, + 0x8CD37CF3, 0xFBD44C65, + 0x4DB26158, 0x3AB551CE, 0xA3BC0074, 0xD4BB30E2, 0x4ADFA541, 0x3DD895D7, + 0xA4D1C46D, 0xD3D6F4FB, + 0x4369E96A, 0x346ED9FC, 0xAD678846, 0xDA60B8D0, 0x44042D73, 0x33031DE5, + 0xAA0A4C5F, 0xDD0D7CC9, + 0x5005713C, 0x270241AA, 0xBE0B1010, 0xC90C2086, 0x5768B525, 0x206F85B3, + 0xB966D409, 0xCE61E49F, + 0x5EDEF90E, 0x29D9C998, 0xB0D09822, 0xC7D7A8B4, 0x59B33D17, 0x2EB40D81, + 0xB7BD5C3B, 0xC0BA6CAD, + 0xEDB88320, 0x9ABFB3B6, 0x03B6E20C, 0x74B1D29A, 0xEAD54739, 0x9DD277AF, + 0x04DB2615, 0x73DC1683, + 0xE3630B12, 0x94643B84, 0x0D6D6A3E, 0x7A6A5AA8, 0xE40ECF0B, 0x9309FF9D, + 0x0A00AE27, 0x7D079EB1, + 0xF00F9344, 0x8708A3D2, 0x1E01F268, 0x6906C2FE, 0xF762575D, 0x806567CB, + 0x196C3671, 0x6E6B06E7, + 0xFED41B76, 0x89D32BE0, 0x10DA7A5A, 0x67DD4ACC, 0xF9B9DF6F, 0x8EBEEFF9, + 0x17B7BE43, 0x60B08ED5, + 0xD6D6A3E8, 0xA1D1937E, 0x38D8C2C4, 0x4FDFF252, 0xD1BB67F1, 0xA6BC5767, + 0x3FB506DD, 0x48B2364B, + 0xD80D2BDA, 0xAF0A1B4C, 0x36034AF6, 0x41047A60, 0xDF60EFC3, 0xA867DF55, + 0x316E8EEF, 0x4669BE79, + 0xCB61B38C, 0xBC66831A, 0x256FD2A0, 0x5268E236, 0xCC0C7795, 0xBB0B4703, + 0x220216B9, 0x5505262F, + 0xC5BA3BBE, 0xB2BD0B28, 0x2BB45A92, 0x5CB36A04, 0xC2D7FFA7, 0xB5D0CF31, + 0x2CD99E8B, 0x5BDEAE1D, + 0x9B64C2B0, 0xEC63F226, 0x756AA39C, 0x026D930A, 0x9C0906A9, 0xEB0E363F, + 0x72076785, 0x05005713, + 0x95BF4A82, 0xE2B87A14, 0x7BB12BAE, 0x0CB61B38, 0x92D28E9B, 0xE5D5BE0D, + 0x7CDCEFB7, 0x0BDBDF21, + 0x86D3D2D4, 0xF1D4E242, 0x68DDB3F8, 0x1FDA836E, 0x81BE16CD, 0xF6B9265B, + 0x6FB077E1, 0x18B74777, + 0x88085AE6, 0xFF0F6A70, 0x66063BCA, 0x11010B5C, 0x8F659EFF, 0xF862AE69, + 0x616BFFD3, 0x166CCF45, + 0xA00AE278, 0xD70DD2EE, 0x4E048354, 0x3903B3C2, 0xA7672661, 0xD06016F7, + 0x4969474D, 0x3E6E77DB, + 0xAED16A4A, 0xD9D65ADC, 0x40DF0B66, 0x37D83BF0, 0xA9BCAE53, 0xDEBB9EC5, + 0x47B2CF7F, 0x30B5FFE9, + 0xBDBDF21C, 0xCABAC28A, 0x53B39330, 0x24B4A3A6, 0xBAD03605, 0xCDD70693, + 0x54DE5729, 0x23D967BF, + 0xB3667A2E, 0xC4614AB8, 0x5D681B02, 0x2A6F2B94, 0xB40BBE37, 0xC30C8EA1, + 0x5A05DF1B, 0x2D02EF8D, +}; + +uint32_t retain_crc; + +/* Calculate CRC32 for len bytes from pointer buf with init starting value. */ +uint32_t GenerateCRC32Sum(const void *buf, unsigned int len, uint32_t init) +{ + uint32_t crc = ~init; + unsigned char *current = (unsigned char *)buf; + while (len--) + crc = crc32_table[(crc ^ *current++) & 0xFF] ^ (crc >> 8); + return ~crc; +} + +/* Calc CRC32 for retain file byte by byte. */ +int CheckFileCRC(FILE * file_buffer) +{ + /* Set the magic constant for one-pass CRC calc according to ZIP CRC32. */ + const uint32_t magic_number = 0x2144df1c; + + /* CRC initial state. */ + uint32_t calc_crc32 = 0; + char data_block = 0; + + while (!feof(file_buffer)) { + if (fread(&data_block, sizeof(data_block), 1, file_buffer)) + calc_crc32 = + GenerateCRC32Sum(&data_block, sizeof(char), calc_crc32); + } + + /* Compare crc result with a magic number. */ + return (calc_crc32 == magic_number) ? 1 : 0; +} + +/* Compare current hash with hash from file byte by byte. */ +int CheckFilehash(void) +{ + int k, ret; + int offset = sizeof(retain_info.retain_size); + + rewind(retain_buffer); + fseek(retain_buffer, offset, SEEK_SET); + + uint32_t size; + ret = fread(&size, sizeof(size), 1, retain_buffer); + if (size != retain_info.hash_size) + return 0; + + for (k = 0; k < retain_info.hash_size; k++) { + uint8_t file_digit; + ret = fread(&file_digit, sizeof(char), 1, retain_buffer); + if (file_digit != *(retain_info.hash + k)) + return 0; + } + + return 1; +} + +void InitRetain(void) +{ + int i; + + /* Get retain size in bytes */ + retain_info.retain_size = GetRetainSize(); + + /* Hash stored in retain file as array of char in hex digits + (that's why we divide strlen in two). */ + retain_info.hash_size = PLC_ID ? strlen(PLC_ID) / 2 : 0; + //retain_info.hash_size = 0; + retain_info.hash = malloc(retain_info.hash_size); + + /* Transform hash string into byte sequence. */ + for (i = 0; i < retain_info.hash_size; i++) { + int byte = 0; + sscanf((PLC_ID + i * 2), "%02X", &byte); + retain_info.hash[i] = byte; + } + + /* Calc header offset. */ + retain_info.header_offset = sizeof(retain_info.retain_size) + + sizeof(retain_info.hash_size) + retain_info.hash_size; + + /* Set header CRC initial state. */ + retain_info.header_crc = 0; + + /* Calc crc for header. */ + retain_info.header_crc = GenerateCRC32Sum(&retain_info.retain_size, + sizeof(retain_info.retain_size), + retain_info.header_crc); + + retain_info.header_crc = GenerateCRC32Sum(&retain_info.hash_size, + sizeof(retain_info.hash_size), + retain_info.header_crc); + + retain_info.header_crc = GenerateCRC32Sum(retain_info.hash, + retain_info.hash_size, + retain_info.header_crc); +} + +void CleanupRetain(void) +{ + /* Free hash memory. */ + free(retain_info.hash); +} + +int CheckRetainFile(const char *file) +{ + retain_buffer = fopen(file, "rb"); + if (retain_buffer) { + /* Check CRC32 and hash. */ + if (CheckFileCRC(retain_buffer)) + if (CheckFilehash()) + return 1; + fclose(retain_buffer); + retain_buffer = NULL; + } + return 0; +} + +int CheckRetainBuffer(void) +{ + retain_buffer = NULL; + if (!retain_info.retain_size) + return 1; + + /* Check latest retain file. */ + if (CheckRetainFile(rb_file)) + return 1; + + /* Check if we have backup. */ + if (CheckRetainFile(rb_file_bckp)) + return 1; + + /* We don't have any valid retain buffer - nothing to remind. */ + return 0; +} + +#ifndef FILE_RETAIN_SAVE_PERIOD_S +#define FILE_RETAIN_SAVE_PERIOD_S 1.0 +#endif + +static double CalcDiffSeconds(IEC_TIME * t1, IEC_TIME * t2) +{ + IEC_TIME dt = { + t1->tv_sec - t2->tv_sec, + t1->tv_nsec - t2->tv_nsec + }; + + if ((dt.tv_nsec < -1000000000) || ((dt.tv_sec > 0) && (dt.tv_nsec < 0))) { + dt.tv_sec--; + dt.tv_nsec += 1000000000; + } + if ((dt.tv_nsec > +1000000000) || ((dt.tv_sec < 0) && (dt.tv_nsec > 0))) { + dt.tv_sec++; + dt.tv_nsec -= 1000000000; + } + return dt.tv_sec + 1e-9 * dt.tv_nsec; +} + +int RetainSaveNeeded(void) +{ + int ret = 0; + static IEC_TIME last_save; + IEC_TIME now; + double diff_s; + + /* no retain */ + if (!retain_info.retain_size) + return 0; + + /* periodic retain flush to avoid high I/O load */ + PLC_GetTime(&now); + + diff_s = CalcDiffSeconds(&now, &last_save); + + if ((diff_s > FILE_RETAIN_SAVE_PERIOD_S) || ForceSaveRetainReq()) { + ret = 1; + last_save = now; + } + return ret; +} + +void ValidateRetainBuffer(void) +{ + if (!retain_buffer) + return; + + /* Add retain data CRC to the end of buffer file. */ + fseek(retain_buffer, 0, SEEK_END); + fwrite(&retain_crc, sizeof(uint32_t), 1, retain_buffer); + + /* Sync file buffer and close file. */ +#ifdef __WIN32 + fflush(retain_buffer); +#else + fsync(fileno(retain_buffer)); +#endif + + fclose(retain_buffer); + retain_buffer = NULL; +} + +void InValidateRetainBuffer(void) +{ + if (!RetainSaveNeeded()) + return; + + /* Rename old retain file into *.bak if it exists. */ + rename(rb_file, rb_file_bckp); + + /* Set file CRC initial value. */ + retain_crc = retain_info.header_crc; + + /* Create new retain file. */ + retain_buffer = fopen(rb_file, "wb+"); + if (!retain_buffer) { + fprintf(stderr, "Failed to create retain file : %s\n", rb_file); + return; + } + + /* Write header to the new file. */ + fwrite(&retain_info.retain_size, + sizeof(retain_info.retain_size), 1, retain_buffer); + fwrite(&retain_info.hash_size, + sizeof(retain_info.hash_size), 1, retain_buffer); + fwrite(retain_info.hash, + sizeof(char), retain_info.hash_size, retain_buffer); +} + +void Retain(unsigned int offset, unsigned int count, void *p) +{ + if (!retain_buffer) + return; + + /* Generate CRC 32 for each data block. */ + retain_crc = GenerateCRC32Sum(p, count, retain_crc); + + /* Save current var in file. */ + fseek(retain_buffer, retain_info.header_offset + offset, SEEK_SET); + fwrite(p, count, 1, retain_buffer); +} + +void Remind(unsigned int offset, unsigned int count, void *p) +{ + int ret; + /* Remind variable from file. */ + fseek(retain_buffer, retain_info.header_offset + offset, SEEK_SET); + ret = fread((void *)p, count, 1, retain_buffer); +} +#endif // !HAVE_RETAIN