From b56d7e7937d0604025833e8c881f96c1d0e4147f Mon Sep 17 00:00:00 2001 From: Thomas Fitzsimmons Date: Fri, 14 Jun 2002 20:51:09 +0000 Subject: * libc/argz: New directory. * libc/argz/*: New files. * libc/argz/argz_add.c: New file. * libc/argz/argz_add_sep.c: New file. * libc/argz/argz_append.c: New file. * libc/argz/argz_count.c: New file. * libc/argz/argz_create.c: New file. * libc/argz/argz_create_sep.c: New file. * libc/argz/argz_delete.c: New file. * libc/argz/argz_extract.c: New file. * libc/argz/argz_insert.c: New file. * libc/argz/argz_next.c: New file. * libc/argz/argz_replace.c: New file. * libc/argz/argz_stringify.c: New file. * libc/argz/buf_findstr.c: New file. * libc/argz/envz_add.c: New file. * libc/argz/envz_entry.c: New file. * libc/argz/envz_get.c: New file. * libc/argz/envz_merge.c: New file. * libc/argz/envz_remove.c: New file. * libc/argz/envz_strip.c: New file. * libc/include/argz.h: New file. * libc/include/envz.h: New file. * Makefile.am (LIBC_OBJECTLISTS): Add libc/argz/objectlist.awk.in. * libc/Makefile.am (SUBDIRS): Add argz. (SUBLIBS): Add argz/libargz.la. * libc/configure.in (AC_OUTPUT): Add argz/Makefile. * libc/include/errno.h: Add error_t typedef. --- newlib/libc/argz/argz_replace.c | 83 +++++++++++++++++++++++++++++++++++++++++ 1 file changed, 83 insertions(+) create mode 100644 newlib/libc/argz/argz_replace.c (limited to 'newlib/libc/argz/argz_replace.c') diff --git a/newlib/libc/argz/argz_replace.c b/newlib/libc/argz/argz_replace.c new file mode 100644 index 000000000..92979e6f5 --- /dev/null +++ b/newlib/libc/argz/argz_replace.c @@ -0,0 +1,83 @@ +/* Copyright (C) 2002 by Red Hat, Incorporated. All rights reserved. + * + * Permission to use, copy, modify, and distribute this software + * is freely granted, provided that this notice is preserved. + */ + +#include +#include +#include +#include +#include + +extern int buf_findstr(const char *str, char **buf, size_t *buf_len); + +error_t +argz_replace (char **argz, size_t *argz_len, const char *str, const char *with, unsigned *replace_count) +{ + const int str_len = strlen(str); + const int with_len = strlen(with); + const int len_diff = with_len - str_len; + + char *buf_iter = *argz; + size_t buf_len = *argz_len; + char *last_iter = NULL; + char *new_argz = NULL; + size_t new_argz_len = 0; + char *new_argz_iter = NULL; + + *replace_count = 0; + new_argz_len = *argz_len; + + while(buf_len) + { + if(buf_findstr(str, &buf_iter, &buf_len)) + { + *replace_count += 1; + new_argz_len += len_diff; + } + } + + if (*replace_count) + { + new_argz = (char *)malloc(new_argz_len); + + buf_iter = *argz; + buf_len = *argz_len; + last_iter = buf_iter; + new_argz_iter = new_argz; + + while(buf_len) + { + if (buf_findstr(str, &buf_iter, &buf_len)) + { + /* copy everything up to, but not including str, from old argz to + new argz. */ + memcpy(new_argz_iter, last_iter, buf_iter - last_iter - str_len); + new_argz_iter += (buf_iter - last_iter - str_len); + /* copy replacement string. */ + memcpy(new_argz_iter, with, with_len); + new_argz_iter += with_len; + last_iter = buf_iter; + } + } + /* copy everything after last occurrence of str. */ + memcpy(new_argz_iter, last_iter, *argz + *argz_len - last_iter); + + /* reallocate argz, and copy over the new value. */ + if(!(*argz = (char *)realloc(*argz, new_argz_len))) + return ENOMEM; + + memcpy(*argz, new_argz, new_argz_len); + *argz_len = new_argz_len; + + if (*argz_len == 0) + { + free(*argz); + *argz = NULL; + } + free(new_argz); + } + + return 0; +} -- cgit v1.2.3