gbdk-2020 | GameBoy Development Kit |
| download: https://git.y1.nz/archives/gbdk.tar.gz | |
| README | Files | Log | Refs | LICENSE |
gbdk-support/bankpack/path_ops.c
1 // This is free and unencumbered software released into the public domain.
2 // For more information, please refer to <https://unlicense.org>
3 // bbbbbr 2020
4
5 #include <stdio.h>
6 #include <string.h>
7 #include "common.h"
8
9 const char kExtensionSeparator = '.';
10 const char kPathSeparator =
11
12 #ifdef _WIN32
13 #ifndef _WIN32
14 #define __WIN32__
15 #endif
16 #endif
17
18 #ifdef __WIN32__
19 '\\';
20 #else
21 '/';
22 #endif
23
24
25 static const char * get_filename_from_path(const char * path);
26 static void filename_remove_extension(char * path);
27
28
29 void filename_replace_extension(char * filename, char * new_ext, size_t maxlen) {
30
31 // Use a temp work string in case out and in filename are the same pointer
32 char temp[MAX_FILE_STR];
33 char ext_sep[2] = {'\0'}; // default to empty string
34
35 // Add leading . to path if needed
36 if (new_ext[0] != kExtensionSeparator) {
37 ext_sep[0] = kExtensionSeparator;
38 ext_sep[1] = '\0';
39 }
40
41 // Strip extension from filename, append new extension
42 filename_remove_extension(filename);
43 snprintf(temp, maxlen, "%s%s%s", filename, ext_sep, new_ext);
44 snprintf(filename, maxlen, "%s", temp);
45 }
46
47
48 void filename_replace_path(char * filename, char * new_path, size_t maxlen) {
49
50 // Use a temp work string in case out and in filename are the same pointer
51 char temp[MAX_FILE_STR];
52 char path_sep[2] = {'\0'}; // default to empty string
53
54 // Add trailing slash to path if needed
55 if ((new_path[(strlen(new_path)-1)] != kPathSeparator)) {
56 path_sep[0] = kPathSeparator;
57 path_sep[1] = '\0';
58 }
59
60 // Strip path from path+filename, pre-pend new path
61 snprintf(temp, maxlen, "%s%s%s", new_path, path_sep, get_filename_from_path(filename));
62 snprintf(filename, maxlen, "%s", temp);
63 }
64
65
66 static const char * get_filename_from_path(const char * path)
67 {
68 size_t i;
69
70 // Returns string starting at last occurrance of path separator char
71 for(i = strlen(path) - 1; i; i--) {
72 if (path[i] == kPathSeparator) {
73 return &path[i+1];
74 }
75 }
76 return path;
77 }
78
79
80 static void filename_remove_extension(char * path)
81 {
82 char * last_ext;
83 char * last_slash;
84
85 // Find the last path separator if present
86 // Starting from here ensures that no path ".." characters
87 // get mistaken as extension delimiters.
88 last_slash = strrchr (path, kExtensionSeparator);
89 if (!last_slash)
90 last_slash = path;
91
92 // Then check to see if there is an extension (starting with the last occurance of '.')
93 // (tries to remove *all* trailing extensions backward until the last slash)
94 last_ext = strrchr (last_slash, kExtensionSeparator);
95 while (last_ext) {
96 if (last_ext != NULL) {
97 // If an extension is found then overwrite it with a string terminator
98 *last_ext = '\0';
99 }
100 last_ext = strrchr (last_slash, kExtensionSeparator);
101 }
102 }
103
This webpage is intended to be an accessible preview of this repository. To get a fuller picture, clone it and use the git CLI.