83d290c56f
When U-Boot started using SPDX tags we were among the early adopters and there weren't a lot of other examples to borrow from. So we picked the area of the file that usually had a full license text and replaced it with an appropriate SPDX-License-Identifier: entry. Since then, the Linux Kernel has adopted SPDX tags and they place it as the very first line in a file (except where shebangs are used, then it's second line) and with slightly different comment styles than us. In part due to community overlap, in part due to better tag visibility and in part for other minor reasons, switch over to that style. This commit changes all instances where we have a single declared license in the tag as both the before and after are identical in tag contents. There's also a few places where I found we did not have a tag and have introduced one. Signed-off-by: Tom Rini <trini@konsulko.com>
90 lines
2.2 KiB
C
90 lines
2.2 KiB
C
// SPDX-License-Identifier: GPL-2.0+
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/* getline.c -- Replacement for GNU C library function getline
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*
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* Copyright (C) 1993, 1996, 2001, 2002 Free Software Foundation, Inc.
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*/
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/* Written by Jan Brittenson, bson@gnu.ai.mit.edu. */
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#include <assert.h>
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#include <stdio.h>
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/* Always add at least this many bytes when extending the buffer. */
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#define MIN_CHUNK 64
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/* Read up to (and including) a TERMINATOR from STREAM into *LINEPTR
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+ OFFSET (and null-terminate it). *LINEPTR is a pointer returned from
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malloc (or NULL), pointing to *N characters of space. It is realloc'd
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as necessary. Return the number of characters read (not including the
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null terminator), or -1 on error or EOF.
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NOTE: There is another getstr() function declared in <curses.h>. */
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static int getstr(char **lineptr, size_t *n, FILE *stream,
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char terminator, size_t offset)
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{
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int nchars_avail; /* Allocated but unused chars in *LINEPTR. */
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char *read_pos; /* Where we're reading into *LINEPTR. */
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int ret;
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if (!lineptr || !n || !stream)
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return -1;
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if (!*lineptr) {
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*n = MIN_CHUNK;
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*lineptr = malloc(*n);
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if (!*lineptr)
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return -1;
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}
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nchars_avail = *n - offset;
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read_pos = *lineptr + offset;
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for (;;) {
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register int c = getc(stream);
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/* We always want at least one char left in the buffer, since we
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always (unless we get an error while reading the first char)
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NUL-terminate the line buffer. */
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assert(*n - nchars_avail == read_pos - *lineptr);
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if (nchars_avail < 2) {
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if (*n > MIN_CHUNK)
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*n *= 2;
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else
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*n += MIN_CHUNK;
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nchars_avail = *n + *lineptr - read_pos;
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*lineptr = realloc(*lineptr, *n);
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if (!*lineptr)
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return -1;
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read_pos = *n - nchars_avail + *lineptr;
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assert(*n - nchars_avail == read_pos - *lineptr);
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}
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if (c == EOF || ferror (stream)) {
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/* Return partial line, if any. */
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if (read_pos == *lineptr)
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return -1;
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else
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break;
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}
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*read_pos++ = c;
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nchars_avail--;
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if (c == terminator)
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/* Return the line. */
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break;
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}
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/* Done - NUL terminate and return the number of chars read. */
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*read_pos = '\0';
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ret = read_pos - (*lineptr + offset);
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return ret;
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}
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int getline (char **lineptr, size_t *n, FILE *stream)
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{
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return getstr(lineptr, n, stream, '\n', 0);
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}
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