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The example did not work because the null byte was not converted, and mbrtowc was called with a zero-length input string. This results in a (size_t) -2 return value, so the function always returns NULL. The size computation for the heap allocation of the result was incorrect because it did not deal with integer overflow. Error checking was missing, and the allocated memory was not freed on error paths. All error returns now set errno. (Note that there is an assumption that free does not clobber errno.) The slightly unportable comparision against (size_t) -2 to catch both (size_t) -1 and (size_t) -2 return values is gone as well. A null wide character needs to be stored in the result explicitly, to terminate it. The description in the manual is updated to deal with these finer points. The (size_t) -2 behavior (consuming the input bytes) matches what is specified in ISO C11. |
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| .. | ||
| add.c | ||
| argp-ex1.c | ||
| argp-ex2.c | ||
| argp-ex3.c | ||
| argp-ex4.c | ||
| atexit.c | ||
| db.c | ||
| dir2.c | ||
| dir.c | ||
| execinfo.c | ||
| filecli.c | ||
| filesrv.c | ||
| fmtmsgexpl.c | ||
| genpass.c | ||
| inetcli.c | ||
| inetsrv.c | ||
| isockad.c | ||
| longopt.c | ||
| mbstouwcs.c | ||
| memopen.c | ||
| memstrm.c | ||
| mkdirent.c | ||
| mkfsock.c | ||
| mkisock.c | ||
| mygetpass.c | ||
| ofdlocks.c | ||
| pipe.c | ||
| popen.c | ||
| README | ||
| rprintf.c | ||
| search.c | ||
| select.c | ||
| setjmp.c | ||
| sigh1.c | ||
| sigusr.c | ||
| stpcpy.c | ||
| strdupa.c | ||
| strftim.c | ||
| subopt.c | ||
| swapcontext.c | ||
| termios.c | ||
| testopt.c | ||
| testpass.c | ||
| timeval_subtract.c | ||
These are source files for example code that appears in The GNU C Library Reference Manual. While the manual itself is licensed under the terms of the GNU Free Documentation License, you can use these source files on their own under the terms of the GNU General Public License as published by the Free Software Foundation; version 2 of the License, or (at your option) any later version.