Georgi Chorbadzhiyski | 522d906 | 2012-03-16 06:42:08 -0500 | [diff] [blame^] | 1 | /* vi: set sw=4 ts=4 :*/ |
| 2 | /* portability.c - code to workaround the deficiencies of various platforms. |
| 3 | * |
| 4 | * Copyright 2012 Rob Landley <rob@landley.net> |
| 5 | * Copyright 2012 Georgi Chorbadzhiyski <gf@unixsol.org> |
| 6 | */ |
| 7 | |
| 8 | #include "toys.h" |
| 9 | |
| 10 | #if defined(__APPLE__) || defined(__ANDROID__) |
| 11 | ssize_t getdelim(char **linep, size_t *np, int delim, FILE *stream) |
| 12 | { |
| 13 | int ch; |
| 14 | size_t new_len; |
| 15 | ssize_t i = 0; |
| 16 | char *line, *new_line; |
| 17 | |
| 18 | // Invalid input |
| 19 | if (!linep || !np) { |
| 20 | errno = EINVAL; |
| 21 | return -1; |
| 22 | } |
| 23 | |
| 24 | if (*linep == NULL || *np == 0) { |
| 25 | *np = 1024; |
| 26 | *linep = calloc(1, *np); |
| 27 | if (*linep == NULL) |
| 28 | return -1; |
| 29 | } |
| 30 | line = *linep; |
| 31 | |
| 32 | while ((ch = getc(stream)) != EOF) { |
| 33 | if (i > *np) { |
| 34 | // Need more space |
| 35 | new_len = *np + 1024; |
| 36 | new_line = realloc(*linep, new_len); |
| 37 | if (!new_line) |
| 38 | return -1; |
| 39 | *np = new_len; |
| 40 | *linep = new_line; |
| 41 | } |
| 42 | |
| 43 | line[i] = ch; |
| 44 | if (ch == delim) |
| 45 | break; |
| 46 | i += 1; |
| 47 | } |
| 48 | |
| 49 | if (i > *np) { |
| 50 | // Need more space |
| 51 | new_len = i + 2; |
| 52 | new_line = realloc(*linep, new_len); |
| 53 | if (!new_line) |
| 54 | return -1; |
| 55 | *np = new_len; |
| 56 | *linep = new_line; |
| 57 | } |
| 58 | line[i + 1] = '\0'; |
| 59 | |
| 60 | return i > 0 ? i : -1; |
| 61 | } |
| 62 | |
| 63 | ssize_t getline(char **linep, size_t *np, FILE *stream) { |
| 64 | return getdelim(linep, np, '\n', stream); |
| 65 | } |
| 66 | #endif |
| 67 | |
| 68 | #if defined(__APPLE__) |
| 69 | extern char **environ; |
| 70 | |
| 71 | int clearenv(void) { |
| 72 | *environ = NULL; |
| 73 | return 0; |
| 74 | } |
| 75 | #endif |