/* PSPP - a program for statistical analysis.
- Copyright (C) 1997-9, 2000, 2006 Free Software Foundation, Inc.
+ Copyright (C) 1997-9, 2000, 2006, 2009 Free Software Foundation, Inc.
This program is free software: you can redistribute it and/or modify
it under the terms of the GNU General Public License as published by
#include <libpspp/message.h>
#include <libpspp/pool.h>
+#include <relocatable.h>
#include "minmax.h"
#include "xalloc.h"
#include "xsize.h"
/* Copies string SRC to buffer DST, of size DST_SIZE bytes.
DST is truncated to DST_SIZE bytes or padded on the right with
- spaces as needed. */
+ copies of PAD as needed. */
void
-buf_copy_str_rpad (char *dst, size_t dst_size, const char *src)
+buf_copy_str_rpad (char *dst, size_t dst_size, const char *src, char pad)
{
size_t src_len = strlen (src);
if (src_len >= dst_size)
else
{
memcpy (dst, src, src_len);
- memset (&dst[src_len], ' ', dst_size - src_len);
+ memset (&dst[src_len], pad, dst_size - src_len);
}
}
/* Copies string SRC to buffer DST, of size DST_SIZE bytes.
DST is truncated to DST_SIZE bytes or padded on the left with
- spaces as needed. */
+ copies of PAD as needed. */
void
-buf_copy_str_lpad (char *dst, size_t dst_size, const char *src)
+buf_copy_str_lpad (char *dst, size_t dst_size, const char *src, char pad)
{
size_t src_len = strlen (src);
if (src_len >= dst_size)
else
{
size_t pad_cnt = dst_size - src_len;
- memset (&dst[0], ' ', pad_cnt);
+ memset (&dst[0], pad, pad_cnt);
memcpy (dst + pad_cnt, src, src_len);
}
}
/* Copies buffer SRC, of SRC_SIZE bytes, to DST, of DST_SIZE bytes.
DST is truncated to DST_SIZE bytes or padded on the left with
- spaces as needed. */
+ copies of PAD as needed. */
void
buf_copy_lpad (char *dst, size_t dst_size,
- const char *src, size_t src_size)
+ const char *src, size_t src_size,
+ char pad)
{
if (src_size >= dst_size)
memmove (dst, src, dst_size);
else
{
- memset (dst, ' ', dst_size - src_size);
+ memset (dst, pad, dst_size - src_size);
memmove (&dst[dst_size - src_size], src, src_size);
}
}
/* Copies buffer SRC, of SRC_SIZE bytes, to DST, of DST_SIZE bytes.
DST is truncated to DST_SIZE bytes or padded on the right with
- spaces as needed. */
+ copies of PAD as needed. */
void
buf_copy_rpad (char *dst, size_t dst_size,
- const char *src, size_t src_size)
+ const char *src, size_t src_size,
+ char pad)
{
if (src_size >= dst_size)
memmove (dst, src, dst_size);
else
{
memmove (dst, src, src_size);
- memset (&dst[src_size], ' ', dst_size - src_size);
+ memset (&dst[src_size], pad, dst_size - src_size);
}
}
void
str_copy_rpad (char *dst, size_t dst_size, const char *src)
{
- size_t src_len = strlen (src);
- if (src_len < dst_size - 1)
+ if (dst_size > 0)
{
- memcpy (dst, src, src_len);
- memset (&dst[src_len], ' ', dst_size - 1 - src_len);
+ size_t src_len = strlen (src);
+ if (src_len < dst_size - 1)
+ {
+ memcpy (dst, src, src_len);
+ memset (&dst[src_len], ' ', dst_size - 1 - src_len);
+ }
+ else
+ memcpy (dst, src, dst_size - 1);
+ dst[dst_size - 1] = 0;
}
- else
- memcpy (dst, src, dst_size - 1);
- dst[dst_size - 1] = 0;
}
/* Copies SRC to DST, which is in a buffer DST_SIZE bytes long.
st->ss.length = new_length;
}
+/* Removes N characters from ST starting at offset START. */
+void
+ds_remove (struct string *st, size_t start, size_t n)
+{
+ if (n > 0 && start < st->ss.length)
+ {
+ if (st->ss.length - start <= n)
+ {
+ /* All characters at or beyond START are deleted. */
+ st->ss.length = start;
+ }
+ else
+ {
+ /* Some characters remain and must be shifted into
+ position. */
+ memmove (st->ss.string + st->ss.length,
+ st->ss.string + st->ss.length + n,
+ st->ss.length - start - n);
+ st->ss.length -= n;
+ }
+ }
+ else
+ {
+ /* There are no characters to delete or no characters at or
+ beyond START, hence deletion is a no-op. */
+ }
+}
+
/* Returns true if ST is empty, false otherwise. */
bool
ds_is_empty (const struct string *st)
return st->ss.string;
}
-/* Appends to ST a newline-terminated line read from STREAM, but
- no more than MAX_LENGTH characters.
- Newline is the last character of ST on return, if encountering
- a newline was the reason for terminating.
- Returns true if at least one character was read from STREAM
- and appended to ST, false if no characters at all were read
- before an I/O error or end of file was encountered (or
- MAX_LENGTH was 0). */
+/* Reads characters from STREAM and appends them to ST, stopping
+ after MAX_LENGTH characters, after appending a newline, or
+ after an I/O error or end of file was encountered, whichever
+ comes first. Returns true if at least one character was added
+ to ST, false if no characters were read before an I/O error or
+ end of file (or if MAX_LENGTH was 0).
+
+ This function accepts LF, CR LF, and CR sequences as new-line,
+ and translates each of them to a single '\n' new-line
+ character in ST. */
bool
ds_read_line (struct string *st, FILE *stream, size_t max_length)
{
- if (!st->ss.length && max_length == SIZE_MAX)
- {
- size_t capacity = st->capacity ? st->capacity + 1 : 0;
- ssize_t n = getline (&st->ss.string, &capacity, stream);
- if (capacity)
- st->capacity = capacity - 1;
- if (n > 0)
- {
- st->ss.length = n;
- return true;
- }
- else
- return false;
- }
- else
+ size_t length;
+
+ for (length = 0; length < max_length; length++)
{
- size_t length;
+ int c = getc (stream);
+ if (c == EOF)
+ break;
- for (length = 0; length < max_length; length++)
+ if (c == '\r')
{
- int c = getc (stream);
- if (c == EOF)
- break;
-
- ds_put_char (st, c);
- if (c == '\n')
- return true;
+ c = getc (stream);
+ if (c != '\n')
+ {
+ ungetc (c, stream);
+ c = '\n';
+ }
}
-
- return length > 0;
+ ds_put_char (st, c);
+ if (c == '\n')
+ return true;
}
+
+ return length > 0;
}
/* Removes a comment introduced by `#' from ST,
{
memset (ds_put_uninit (st, cnt), ch, cnt);
}
+
+
+/* If relocation has been enabled, replace ST,
+ with its relocated version */
+void
+ds_relocate (struct string *st)
+{
+ const char *orig = ds_cstr (st);
+ const char *rel = relocate (orig);
+
+ if ( orig != rel)
+ {
+ ds_clear (st);
+ ds_put_cstr (st, rel);
+ free ((char *) rel);
+ }
+}
+
+
+\f
+
+/* Operations on uint8_t "strings" */
+
+/* Copies buffer SRC, of SRC_SIZE bytes, to DST, of DST_SIZE bytes.
+ DST is truncated to DST_SIZE bytes or padded on the right with
+ copies of PAD as needed. */
+void
+u8_buf_copy_rpad (uint8_t *dst, size_t dst_size,
+ const uint8_t *src, size_t src_size,
+ char pad)
+{
+ if (src_size >= dst_size)
+ memmove (dst, src, dst_size);
+ else
+ {
+ memmove (dst, src, src_size);
+ memset (&dst[src_size], pad, dst_size - src_size);
+ }
+}
projects / pspp-builds.git / blobdiff