1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
|
// Copyright (c) 2015 YamaArashi
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <stdbool.h>
#include <errno.h>
#include <limits.h>
#include "global.h"
#include "util.h"
bool ParseNumber(char *s, char **end, int radix, int *intValue)
{
char *localEnd;
if (end == NULL)
end = &localEnd;
errno = 0;
const long longValue = strtol(s, end, radix);
if (*end == s)
return false; // not a number
if ((longValue == LONG_MIN || longValue == LONG_MAX) && errno == ERANGE)
return false;
if (longValue > INT_MAX)
return false;
if (longValue < INT_MIN)
return false;
*intValue = (int)longValue;
return true;
}
char *GetFileExtension(char *path)
{
char *extension = path;
while (*extension != 0)
extension++;
while (extension > path && *extension != '.')
extension--;
if (extension == path)
return NULL;
extension++;
if (*extension == 0)
return NULL;
return extension;
}
void ExpectFileExtension(char *path, char *expectedExtension)
{
char *extension = GetFileExtension(path);
if (extension == NULL)
FATAL_ERROR("\"%s\" has no file extension.\n", path);
if (strcmp(extension, expectedExtension) != 0)
FATAL_ERROR("Unexpected file extension \"%s\". Expected \"%s\".\n", extension, expectedExtension);
}
void AddFileExtension(char *path, char *extension)
{
int pathLength = strlen(path);
int extensionLength = strlen(extension);
if (pathLength + 1 + extensionLength > GBAGFX_MAX_PATH)
FATAL_ERROR("\"%s\" is too long a path to add the extension \"%s\".\n", path, extension);
path[pathLength] = '.';
memcpy(path + pathLength + 1, extension, extensionLength);
path[pathLength + 1 + extensionLength] = 0;
}
void RemoveFileExtension(char *path)
{
char *extension = GetFileExtension(path);
if (extension == NULL)
FATAL_ERROR("\"%s\" doesn't have a file extension.\n", path);
extension--;
*extension = 0;
}
void ChangeFileExtension(char *path, char *extension)
{
RemoveFileExtension(path);
AddFileExtension(path, extension);
}
unsigned char *ReadWholeFile(char *path, int *size)
{
FILE *fp = fopen(path, "rb");
if (fp == NULL)
FATAL_ERROR("Failed to open \"%s\" for reading.\n", path);
fseek(fp, 0, SEEK_END);
*size = ftell(fp);
unsigned char *buffer = malloc(*size);
if (buffer == NULL)
FATAL_ERROR("Failed to allocate memory for reading \"%s\".\n", path);
rewind(fp);
if (fread(buffer, *size, 1, fp) != 1)
FATAL_ERROR("Failed to read \"%s\".\n", path);
fclose(fp);
return buffer;
}
void WriteWholeFile(char *path, void *buffer, int bufferSize)
{
FILE *fp = fopen(path, "wb");
if (fp == NULL)
FATAL_ERROR("Failed to open \"%s\" for writing.\n", path);
if (fwrite(buffer, bufferSize, 1, fp) != 1)
FATAL_ERROR("Failed to write to \"%s\".\n", path);
fclose(fp);
}
|
