source: cpp/frams/virtfile/stringfile.cpp @ 348

Last change on this file since 348 was 348, checked in by Maciej Komosinski, 7 years ago
  • explicit c_str() in SString instead of (const char*) cast
  • genetic converters and GenMan? are now thread-local which enables multi-threaded simulator separation
  • Property svn:eol-style set to native
File size: 1.7 KB
Line 
1// This file is a part of Framsticks SDK.  http://www.framsticks.com/
2// Copyright (C) 1999-2015  Maciej Komosinski and Szymon Ulatowski.
3// See LICENSE.txt for details.
4
5#include "stringfile.h"
6#include <stdio.h>
7#include <errno.h> //EINVAL
8
9size_t StringFILE::Vread(void *ptr, size_t size, size_t nmemb)
10{
11        int have = (int)(str.len() - pos);
12        if (have <= 0) return 0;
13        int need = (int)(size*nmemb);
14        if (need > have) { nmemb = have / size; need = (int)(size*nmemb); }
15        memcpy(ptr, str.c_str() + pos, need);
16        pos += need;
17        return nmemb;
18}
19
20int StringFILE::Vgetc()
21{
22        if (pos >= str.len()) //...i znowu byl bug roku! :O
23                return EOF;
24        else
25                return str.operator[]((int)pos++);
26}
27
28char *StringFILE::Vgets(char *s, int size)
29{
30        int have = str.len() - (int)pos;
31        if (have <= 0) return 0;
32        if (size < 0) size = 0;
33        if (have > size) have = size - 1;
34        const char* src = str.c_str() + pos;
35        char *dest = s;
36        while (have-- > 0)
37        {
38                *(dest++) = *(src++); pos++;
39                if (dest[-1] == '\n') break;
40        }
41        *dest = 0;
42        return s;
43}
44
45int StringFILE::Vseek(long offset, int whence)
46{
47        switch (whence)
48        {
49        case SEEK_SET: pos = offset; break;
50        case SEEK_CUR: pos += offset; break;
51        case SEEK_END: pos = str.len() - offset; break;
52        default: return EINVAL;
53        }
54        if (pos < 0) pos = 0; else if (pos>str.len()) pos = str.len();
55        return 0;
56}
57
58const char StringFileSystem::PREFIX[] = "string://";
59
60bool StringFileSystem::isStringPath(const char* path)
61{
62        return !strncmp(path, PREFIX, sizeof(PREFIX) - 1);
63}
64
65VirtFILE *StringFileSystem::Vfopen(const char* path, const char*mode)
66{
67        if ((*mode == 'r') && isStringPath(path))
68        {
69                return new StringFILE2(SString(path + sizeof(PREFIX) - 1));
70        }
71        return (chain != NULL) ? chain->Vfopen(path, mode) : NULL;
72}
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