3 files changed, 103 insertions, 0 deletions
diff --git a/app/wlib/mswlib/getline/LICENSE b/app/wlib/mswlib/getline/LICENSE
new file mode 100644
index 0000000..22df455
--- /dev/null
+++ b/app/wlib/mswlib/getline/LICENSE
@@ -0,0 +1,25 @@
+BSD 2-Clause License
+
+Copyright (c) 2022, Costantino Grana
+All rights reserved.
+
+Redistribution and use in source and binary forms, with or without
+modification, are permitted provided that the following conditions are met:
+
+1. Redistributions of source code must retain the above copyright notice, this
+   list of conditions and the following disclaimer.
+
+2. Redistributions in binary form must reproduce the above copyright notice,
+   this list of conditions and the following disclaimer in the documentation
+   and/or other materials provided with the distribution.
+
+THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
+AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
+IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
+DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE
+FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
+DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
+SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER
+CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
+OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
+OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
diff --git a/app/wlib/mswlib/getline/README.md b/app/wlib/mswlib/getline/README.md
new file mode 100644
index 0000000..60f0dae
--- /dev/null
+++ b/app/wlib/mswlib/getline/README.md
@@ -0,0 +1,5 @@
+A POSIX getdelim() and getline() implementation for MSVC
+
+Tired of always having problems in reading arbitrary length lines from file under Windows, I tried to write a POSIX getdelim() and getline() implementation for MSVC. Let me know if you have any suggestion for improving this.
+
+This probably needs a test suite.
diff --git a/app/wlib/mswlib/getline/getline.c b/app/wlib/mswlib/getline/getline.c
new file mode 100644
index 0000000..202c7e2
--- /dev/null
+++ b/app/wlib/mswlib/getline/getline.c
@@ -0,0 +1,73 @@
+#include "getline.h"
+
+#include <stdlib.h>
+#include <errno.h>
+
+// MSVC specific implementation
+static void fseterr(FILE *fp)
+{
+    struct file { // Undocumented implementation detail
+        unsigned char *_ptr;
+        unsigned char *_base;
+        int _cnt;
+        int _flag;
+        int _file;
+        int _charbuf;
+        int _bufsiz;
+    };
+    #define _IOERR 0x10
+
+    ((struct file *)fp)->_flag |= _IOERR;
+}
+
+ssize_t getdelim(char **restrict lineptr, size_t *restrict n, int delim, FILE *restrict stream)
+{
+    if (lineptr == NULL || n == NULL || stream == NULL || (*lineptr == NULL && *n != 0)) {
+        errno = EINVAL;
+        return -1;
+    }
+    if (feof(stream) || ferror(stream)) {
+        return -1;
+    }
+
+    if (*lineptr == NULL) {
+        *n = 256;
+        *lineptr = malloc(*n);
+        if (*lineptr == NULL) {
+            fseterr(stream);
+            errno = ENOMEM;
+            return -1;
+        }
+    }
+    ssize_t nread = 0;
+    int c = EOF;
+    while (c != delim) {
+        c = fgetc(stream);
+        if (c == EOF) {
+            break;
+        }
+        if (nread >= (ssize_t)(*n - 1)) {
+            size_t newn = *n * 2;
+            char *newptr = realloc(*lineptr, newn);
+            if (newptr == NULL) {
+                fseterr(stream);
+                errno = ENOMEM;
+                return -1;
+            }
+            *lineptr = newptr;
+            *n = newn;
+        }
+        (*lineptr)[nread++] = c;
+    }
+    if (c == EOF && nread == 0) {
+        return -1;
+    }
+    (*lineptr)[nread] = 0;
+    return nread;
+}
+
+ssize_t getline(char **restrict lineptr, size_t *restrict n, FILE *restrict stream)
+{
+    return getdelim(lineptr, n, '\n', stream);
+}
+