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/* portability.c - code to workaround the deficiencies of various platforms.
*
* Copyright 2012 Rob Landley <rob@landley.net>
* Copyright 2012 Georgi Chorbadzhiyski <gf@unixsol.org>
*/
#include "toys.h"
#if defined(__APPLE__) || defined(__ANDROID__)
ssize_t getdelim(char **linep, size_t *np, int delim, FILE *stream)
{
int ch;
size_t new_len;
ssize_t i = 0;
char *line, *new_line;
// Invalid input
if (!linep || !np) {
errno = EINVAL;
return -1;
}
if (*linep == NULL || *np == 0) {
*np = 1024;
*linep = calloc(1, *np);
if (*linep == NULL) return -1;
}
line = *linep;
while ((ch = getc(stream)) != EOF) {
if (i > *np) {
// Need more space
new_len = *np + 1024;
new_line = realloc(*linep, new_len);
if (!new_line) return -1;
*np = new_len;
*linep = new_line;
}
line[i] = ch;
if (ch == delim) break;
i += 1;
}
if (i > *np) {
// Need more space
new_len = i + 2;
new_line = realloc(*linep, new_len);
if (!new_line) return -1;
*np = new_len;
*linep = new_line;
}
line[i + 1] = '\0';
return i > 0 ? i : -1;
}
ssize_t getline(char **linep, size_t *np, FILE *stream)
{
return getdelim(linep, np, '\n', stream);
}
#endif
#if defined(__APPLE__)
extern char **environ;
int clearenv(void)
{
*environ = NULL;
return 0;
}
#endif
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