-/* PSPP - computes sample statistics.
- Copyright (C) 1997-9, 2000, 2006 Free Software Foundation, Inc.
+/* PSPP - a program for statistical analysis.
+ 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 the Free Software Foundation; either version 2 of the
- License, or (at your option) any later version.
+ 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
+ the Free Software Foundation, either version 3 of the License, or
+ (at your option) any later version.
- This program is distributed in the hope that it will be useful, but
- WITHOUT ANY WARRANTY; without even the implied warranty of
- MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
- General Public License for more details.
+ This program is distributed in the hope that it will be useful,
+ but WITHOUT ANY WARRANTY; without even the implied warranty of
+ MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+ GNU General Public License for more details.
You should have received a copy of the GNU General Public License
- along with this program; if not, write to the Free Software
- Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA
- 02110-1301, USA. */
+ along with this program. If not, see <http://www.gnu.org/licenses/>. */
#include <config.h>
#include "str.h"
#include <ctype.h>
-#include <limits.h>
+#include <errno.h>
+#include <stdint.h>
#include <stdlib.h>
-#include <libpspp/alloc.h>
#include <libpspp/message.h>
#include <libpspp/pool.h>
+#include <relocatable.h>
#include "minmax.h"
-#include "size_max.h"
+#include "xalloc.h"
#include "xsize.h"
\f
/* Reverses the order of NBYTES bytes at address P, thus converting
const unsigned char *a = (unsigned char *) a_;
const unsigned char *b = (unsigned char *) b_;
- while (size-- > 0)
+ while (size-- > 0)
{
unsigned char ac = toupper (*a++);
unsigned char bc = toupper (*b++);
- if (ac != bc)
+ if (ac != bc)
return ac > bc ? 1 : -1;
}
result = memcmp (a, b, min_len);
if (result != 0)
return result;
- else
+ else
{
size_t idx;
-
- if (a_len < b_len)
+
+ if (a_len < b_len)
{
for (idx = min_len; idx < b_len; idx++)
if (' ' != b[idx])
return ' ' > b[idx] ? 1 : -1;
}
- else
+ else
{
for (idx = min_len; idx < a_len; idx++)
if (a[idx] != ' ')
/* 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.
Truncates DST to DST_SIZE - 1 characters, if necessary. */
void
-str_copy_trunc (char *dst, size_t dst_size, const char *src)
+str_copy_trunc (char *dst, size_t dst_size, const char *src)
{
size_t src_len = strlen (src);
assert (dst_size > 0);
if (src_len + 1 < dst_size)
memcpy (dst, src, src_len + 1);
- else
+ else
{
memcpy (dst, src, dst_size - 1);
dst[dst_size - 1] = '\0';
Truncates DST to DST_SIZE - 1 characters, if necessary. */
void
str_copy_buf_trunc (char *dst, size_t dst_size,
- const char *src, size_t src_size)
+ const char *src, size_t src_size)
{
size_t dst_len;
assert (dst_size > 0);
/* Converts each character in S to uppercase. */
void
-str_uppercase (char *s)
+str_uppercase (char *s)
{
for (; *s != '\0'; s++)
*s = toupper ((unsigned char) *s);
/* Converts each character in S to lowercase. */
void
-str_lowercase (char *s)
+str_lowercase (char *s)
{
for (; *s != '\0'; s++)
*s = tolower ((unsigned char) *s);
}
+/* Converts NUMBER into a string in 26-adic notation in BUFFER,
+ which has room for SIZE bytes. Returns true if successful,
+ false if NUMBER, plus a trailing null, is too large to fit in
+ the available space.
+
+ 26-adic notation is "spreadsheet column numbering": 1 = A, 2 =
+ B, 3 = C, ... 26 = Z, 27 = AA, 28 = AB, 29 = AC, ...
+
+ 26-adic notation is the special case of a k-adic numeration
+ system (aka bijective base-k numeration) with k=26. In k-adic
+ numeration, the digits are {1, 2, 3, ..., k} (there is no
+ digit 0), and integer 0 is represented by the empty string.
+ For more information, see
+ http://en.wikipedia.org/wiki/Bijective_numeration. */
+bool
+str_format_26adic (unsigned long int number, char buffer[], size_t size)
+{
+ size_t length = 0;
+
+ while (number-- > 0)
+ {
+ if (length >= size)
+ return false;
+ buffer[length++] = "ABCDEFGHIJKLMNOPQRSTUVWXYZ"[number % 26];
+ number /= 26;
+ }
+
+ if (length >= size)
+ return false;
+ buffer[length] = '\0';
+
+ buf_reverse (buffer, length);
+ return true;
+}
+
/* Formats FORMAT into DST, as with sprintf(), and returns the
address of the terminating null written to DST. */
char *
-spprintf (char *dst, const char *format, ...)
+spprintf (char *dst, const char *format, ...)
{
va_list args;
int count;
/* Sets the SIZE bytes starting at BLOCK to C,
and returns the byte following BLOCK. */
void *
-mempset (void *block, int c, size_t size)
+mempset (void *block, int c, size_t size)
{
memset (block, c, size);
return (char *) block + size;
/* Returns an empty substring. */
struct substring
-ss_empty (void)
+ss_empty (void)
{
struct substring ss;
ss.string = NULL;
/* Returns a substring whose contents are the given C-style
string CSTR. */
struct substring
-ss_cstr (const char *cstr)
+ss_cstr (const char *cstr)
{
return ss_buffer (cstr, strlen (cstr));
}
/* Returns a substring whose contents are the CNT characters in
- BUFFER. */
+ BUFFER. */
struct substring
-ss_buffer (const char *buffer, size_t cnt)
+ss_buffer (const char *buffer, size_t cnt)
{
struct substring ss;
ss.string = (char *) buffer;
{
if (start < ss.length)
return ss_buffer (ss.string + start, MIN (cnt, ss.length - start));
- else
+ else
return ss_buffer (ss.string + ss.length, 0);
}
/* Returns a substring whose contents are the first CNT
characters in SS. */
struct substring
-ss_head (struct substring ss, size_t cnt)
+ss_head (struct substring ss, size_t cnt)
{
return ss_buffer (ss.string, MIN (cnt, ss.length));
}
/* Returns a substring whose contents are the last CNT characters
in SS. */
struct substring
-ss_tail (struct substring ss, size_t cnt)
+ss_tail (struct substring ss, size_t cnt)
{
if (cnt < ss.length)
return ss_buffer (ss.string + (ss.length - cnt), cnt);
/* Makes a malloc()'d copy of the contents of OLD
and stores it in NEW. */
void
-ss_alloc_substring (struct substring *new, struct substring old)
+ss_alloc_substring (struct substring *new, struct substring old)
{
new->string = xmalloc (old.length);
new->length = old.length;
/* Allocates room for a CNT-character string in NEW. */
void
-ss_alloc_uninit (struct substring *new, size_t cnt)
+ss_alloc_uninit (struct substring *new, size_t cnt)
{
new->string = xmalloc (cnt);
new->length = cnt;
in POOL, and stores it in NEW. */
void
ss_alloc_substring_pool (struct substring *new, struct substring old,
- struct pool *pool)
+ struct pool *pool)
{
new->string = pool_alloc_unaligned (pool, old.length);
new->length = old.length;
/* Allocates room for a CNT-character string in NEW in POOL. */
void
-ss_alloc_uninit_pool (struct substring *new, size_t cnt, struct pool *pool)
+ss_alloc_uninit_pool (struct substring *new, size_t cnt, struct pool *pool)
{
new->string = pool_alloc_unaligned (pool, cnt);
new->length = cnt;
/* Frees the string that SS points to. */
void
-ss_dealloc (struct substring *ss)
+ss_dealloc (struct substring *ss)
{
free (ss->string);
}
/* Truncates SS to at most CNT characters in length. */
void
-ss_truncate (struct substring *ss, size_t cnt)
+ss_truncate (struct substring *ss, size_t cnt)
{
if (ss->length > cnt)
ss->length = cnt;
/* Removes trailing characters in TRIM_SET from SS.
Returns number of characters removed. */
size_t
-ss_rtrim (struct substring *ss, struct substring trim_set)
+ss_rtrim (struct substring *ss, struct substring trim_set)
{
size_t cnt = 0;
while (cnt < ss->length
&& ss_find_char (trim_set,
- ss->string[ss->length - cnt - 1]) != SIZE_MAX)
+ ss->string[ss->length - cnt - 1]) != SIZE_MAX)
cnt++;
ss->length -= cnt;
return cnt;
-}
+}
/* Removes leading characters in TRIM_SET from SS.
Returns number of characters removed. */
/* Trims leading and trailing characters in TRIM_SET from SS. */
void
-ss_trim (struct substring *ss, struct substring trim_set)
+ss_trim (struct substring *ss, struct substring trim_set)
{
ss_ltrim (ss, trim_set);
ss_rtrim (ss, trim_set);
/* If the last character in SS is C, removes it and returns true.
Otherwise, returns false without changing the string. */
bool
-ss_chomp (struct substring *ss, char c)
+ss_chomp (struct substring *ss, char c)
{
if (ss_last (*ss) == c)
{
empty string contains a single token. */
bool
ss_separate (struct substring ss, struct substring delimiters,
- size_t *save_idx, struct substring *token)
+ size_t *save_idx, struct substring *token)
{
if (*save_idx <= ss_length (ss))
{
*save_idx += length + 1;
return true;
}
- else
+ else
{
*token = ss_empty ();
- return false;
+ return false;
}
}
/* Removes the first CNT characters from SS. */
void
-ss_advance (struct substring *ss, size_t cnt)
+ss_advance (struct substring *ss, size_t cnt)
{
if (cnt > ss->length)
cnt = ss->length;
/* If the first character in SS is C, removes it and returns true.
Otherwise, returns false without changing the string. */
bool
-ss_match_char (struct substring *ss, char c)
+ss_match_char (struct substring *ss, char c)
{
if (ss_first (*ss) == c)
{
return false;
}
+/* If the first character in SS is in MATCH, removes it and
+ returns the character that was removed.
+ Otherwise, returns EOF without changing the string. */
+int
+ss_match_char_in (struct substring *ss, struct substring match)
+{
+ int c = EOF;
+ if (ss->length > 0
+ && memchr (match.string, ss->string[0], match.length) != NULL)
+ {
+ c = ss->string[0];
+ ss->string++;
+ ss->length--;
+ }
+ return c;
+}
+
/* If SS begins with TARGET, removes it and returns true.
Otherwise, returns false without changing SS. */
bool
/* Removes the first character from SS and returns it.
If SS is empty, returns EOF without modifying SS. */
int
-ss_get_char (struct substring *ss)
+ss_get_char (struct substring *ss)
{
int c = ss_first (*ss);
- if (c != EOF)
+ if (c != EOF)
{
ss->string++;
ss->length--;
is shorter than CNT characters). Trims the same characters
from the beginning of SS. Returns CNT. */
size_t
-ss_get_chars (struct substring *ss, size_t cnt, struct substring *out)
+ss_get_chars (struct substring *ss, size_t cnt, struct substring *out)
{
*out = ss_head (*ss, cnt);
ss_advance (ss, cnt);
otherwise the number of characters removed from SS. Stores
the integer's value into *VALUE. */
size_t
-ss_get_long (struct substring *ss, long *value)
+ss_get_long (struct substring *ss, long *value)
{
char tmp[64];
size_t length;
length = ss_span (*ss, ss_cstr ("+-"));
length += ss_span (ss_substr (*ss, length, SIZE_MAX), ss_cstr (CC_DIGITS));
- if (length > 0 && length < sizeof tmp)
+ if (length > 0 && length < sizeof tmp)
{
char *tail;
tmp[length] = '\0';
*value = strtol (tmp, &tail, 10);
- if (tail - tmp == length)
+ if (tail - tmp == length)
{
ss_advance (ss, length);
return length;
/* Returns true if SS is empty (contains no characters),
false otherwise. */
bool
-ss_is_empty (struct substring ss)
+ss_is_empty (struct substring ss)
{
return ss.length == 0;
}
/* Returns the number of characters in SS. */
size_t
-ss_length (struct substring ss)
+ss_length (struct substring ss)
{
return ss.length;
}
/* Returns a pointer to the characters in SS. */
char *
-ss_data (struct substring ss)
+ss_data (struct substring ss)
{
return ss.string;
}
/* Returns a pointer just past the last character in SS. */
char *
-ss_end (struct substring ss)
+ss_end (struct substring ss)
{
return ss.string + ss.length;
}
range of unsigned char. Returns EOF if IDX is out of the
range of indexes for SS. */
int
-ss_at (struct substring ss, size_t idx)
+ss_at (struct substring ss, size_t idx)
{
return idx < ss.length ? (unsigned char) ss.string[idx] : EOF;
}
/* Returns the first character in SS as a value in the range of
unsigned char. Returns EOF if SS is the empty string. */
int
-ss_first (struct substring ss)
+ss_first (struct substring ss)
{
return ss_at (ss, 0);
}
/* Returns the last character in SS as a value in the range of
unsigned char. Returns EOF if SS is the empty string. */
int
-ss_last (struct substring ss)
+ss_last (struct substring ss)
{
return ss.length > 0 ? (unsigned char) ss.string[ss.length - 1] : EOF;
}
/* Returns the number of contiguous characters at the beginning
of SS that are in SKIP_SET. */
size_t
-ss_span (struct substring ss, struct substring skip_set)
+ss_span (struct substring ss, struct substring skip_set)
{
size_t i;
- for (i = 0; i < ss.length; i++)
+ for (i = 0; i < ss.length; i++)
if (ss_find_char (skip_set, ss.string[i]) == SIZE_MAX)
- break;
+ break;
return i;
}
/* Returns the number of contiguous characters at the beginning
of SS that are not in SKIP_SET. */
size_t
-ss_cspan (struct substring ss, struct substring stop_set)
+ss_cspan (struct substring ss, struct substring stop_set)
{
size_t i;
- for (i = 0; i < ss.length; i++)
+ for (i = 0; i < ss.length; i++)
if (ss_find_char (stop_set, ss.string[i]) != SIZE_MAX)
- break;
+ break;
return i;
}
/* Returns the offset in SS of the first instance of C,
or SIZE_MAX if C does not occur in SS. */
size_t
-ss_find_char (struct substring ss, char c)
+ss_find_char (struct substring ss, char c)
{
const char *p = memchr (ss.string, c, ss.length);
return p != NULL ? p - ss.string : SIZE_MAX;
/* Allocates and returns a null-terminated string that contains
SS. */
char *
-ss_xstrdup (struct substring ss)
+ss_xstrdup (struct substring ss)
{
char *s = xmalloc (ss.length + 1);
memcpy (s, ss.string, ss.length);
/* Initializes ST with initial contents S. */
void
-ds_init_string (struct string *st, const struct string *s)
+ds_init_string (struct string *st, const struct string *s)
{
ds_init_substring (st, ds_ss (s));
}
/* Initializes ST with initial contents S. */
void
-ds_init_cstr (struct string *st, const char *s)
+ds_init_cstr (struct string *st, const char *s)
{
ds_init_substring (st, ss_cstr (s));
}
void
ds_destroy (struct string *st)
{
- if (st != NULL)
+ if (st != NULL)
{
ss_dealloc (&st->ss);
st->ss.string = NULL;
st->ss.length = 0;
- st->capacity = 0;
+ st->capacity = 0;
}
}
/* Swaps the contents of strings A and B. */
void
-ds_swap (struct string *a, struct string *b)
+ds_swap (struct string *a, struct string *b)
{
struct string tmp = *a;
*a = *b;
/* Helper function for ds_register_pool. */
static void
-free_string (void *st_)
+free_string (void *st_)
{
struct string *st = st_;
ds_destroy (st);
/* Arranges for ST to be destroyed automatically as part of
POOL. */
void
-ds_register_pool (struct string *st, struct pool *pool)
+ds_register_pool (struct string *st, struct pool *pool)
{
pool_register (pool, free_string, st);
}
/* Copies SRC into DST.
DST and SRC may be the same string. */
void
-ds_assign_string (struct string *dst, const struct string *src)
+ds_assign_string (struct string *dst, const struct string *src)
{
ds_assign_substring (dst, ds_ss (src));
}
/* Returns a substring that contains ST. */
struct substring
-ds_ss (const struct string *st)
+ds_ss (const struct string *st)
{
return st->ss;
}
exceeds the length of ST, then the substring will only be
ds_length(ST) - START characters long. */
struct substring
-ds_substr (const struct string *st, size_t start, size_t cnt)
+ds_substr (const struct string *st, size_t start, size_t cnt)
{
return ss_substr (ds_ss (st), start, cnt);
}
ST. If CNT exceeds the length of ST, then the substring will
contain all of ST. */
struct substring
-ds_head (const struct string *st, size_t cnt)
+ds_head (const struct string *st, size_t cnt)
{
return ss_head (ds_ss (st), cnt);
}
/* Removes trailing characters in TRIM_SET from ST.
Returns number of characters removed. */
size_t
-ds_rtrim (struct string *st, struct substring trim_set)
+ds_rtrim (struct string *st, struct substring trim_set)
{
return ss_rtrim (&st->ss, trim_set);
}
/* Removes leading characters in TRIM_SET from ST.
Returns number of characters removed. */
size_t
-ds_ltrim (struct string *st, struct substring trim_set)
+ds_ltrim (struct string *st, struct substring trim_set)
{
size_t cnt = ds_span (st, trim_set);
if (cnt > 0)
/* Trims leading and trailing characters in TRIM_SET from ST.
Returns number of charactesr removed. */
size_t
-ds_trim (struct string *st, struct substring trim_set)
+ds_trim (struct string *st, struct substring trim_set)
{
size_t cnt = ds_rtrim (st, trim_set);
return cnt + ds_ltrim (st, trim_set);
/* If the last character in ST is C, removes it and returns true.
Otherwise, returns false without modifying ST. */
bool
-ds_chomp (struct string *st, char c)
+ds_chomp (struct string *st, char c)
{
return ss_chomp (&st->ss, c);
}
LENGTH characters in size. If ST is initially LENGTH
characters or longer, this is a no-op. */
void
-ds_rpad (struct string *st, size_t length, char pad)
+ds_rpad (struct string *st, size_t length, char pad)
{
if (length > st->ss.length)
ds_put_char_multiple (st, pad, length - st->ss.length);
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)
+ds_is_empty (const struct string *st)
{
return ss_is_empty (st->ss);
}
range of unsigned char. Returns EOF if IDX is out of the
range of indexes for ST. */
int
-ds_at (const struct string *st, size_t idx)
+ds_at (const struct string *st, size_t idx)
{
return ss_at (ds_ss (st), idx);
}
/* Returns the first character in ST as a value in the range of
unsigned char. Returns EOF if ST is the empty string. */
int
-ds_first (const struct string *st)
+ds_first (const struct string *st)
{
return ss_first (ds_ss (st));
}
/* Returns the last character in ST as a value in the range of
unsigned char. Returns EOF if ST is the empty string. */
int
-ds_last (const struct string *st)
+ds_last (const struct string *st)
{
return ss_last (ds_ss (st));
}
/* Allocates and returns a null-terminated string that contains
ST. */
char *
-ds_xstrdup (const struct string *st)
+ds_xstrdup (const struct string *st)
{
return ss_xstrdup (ds_ss (st));
}
ds_cstr (const struct string *st_)
{
struct string *st = (struct string *) st_;
- if (st->ss.string == NULL)
+ if (st->ss.string == NULL)
ds_extend (st, 1);
st->ss.string[st->ss.length] = '\0';
return st->ss.string;
}
-/* Appends to ST a newline-terminated line read from STREAM.
- Newline is the last character of ST on return, unless an I/O error
- or end of file is encountered after reading some characters.
- Returns true if a line is successfully read, false if no characters at
- all were read before an I/O error or end of file was
- encountered. */
+/* 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)
+ds_read_line (struct string *st, FILE *stream, size_t max_length)
{
- int c;
-
- c = getc (stream);
- if (c == EOF)
- return false;
+ size_t length;
- for (;;)
+ for (length = 0; length < max_length; length++)
{
+ int c = getc (stream);
+ if (c == EOF)
+ break;
+
+ if (c == '\r')
+ {
+ c = getc (stream);
+ if (c != '\n')
+ {
+ ungetc (c, stream);
+ c = '\n';
+ }
+ }
ds_put_char (st, c);
if (c == '\n')
- return true;
-
- c = getc (stream);
- if (c == EOF)
- return true;
+ return true;
}
+
+ return length > 0;
}
/* Removes a comment introduced by `#' from ST,
{
char *cp;
int quote = 0;
-
+
for (cp = ds_data (st); cp < ds_end (st); cp++)
if (quote)
{
- Deletes comments introduced by `#' outside of single or double
quotes.
- - Deletes trailing white space.
+ - Deletes trailing white space.
Returns true if a line was successfully read, false on
failure. If LINE_NUMBER is non-null, then *LINE_NUMBER is
ds_clear (st);
do
{
- if (!ds_read_line (st, stream))
+ if (!ds_read_line (st, stream, SIZE_MAX))
return false;
(*line_number)++;
ds_rtrim (st, ss_cstr (CC_SPACES));
}
while (ds_chomp (st, '\\'));
-
+
remove_comment (st);
return true;
}
/* Attempts to read SIZE * CNT bytes from STREAM and append them
to ST.
- Returns number of bytes actually read. */
-size_t
-ds_read_stream (struct string *st, size_t size, size_t cnt, FILE *stream)
+ Returns true if all the requested data was read, false otherwise. */
+bool
+ds_read_stream (struct string *st, size_t size, size_t cnt, FILE *stream)
{
if (size != 0)
{
if (size_in_bounds_p (xsum (ds_length (st), try_bytes)))
{
char *buffer = ds_put_uninit (st, try_bytes);
- size_t got_bytes = fread (buffer, size, cnt, stream);
+ size_t got_bytes = fread (buffer, 1, try_bytes, stream);
ds_truncate (st, ds_length (st) - (try_bytes - got_bytes));
- return got_bytes;
+ return got_bytes == try_bytes;
+ }
+ else
+ {
+ errno = ENOMEM;
+ return false;
}
}
- return 0;
+ else
+ return true;
}
/* Concatenates S onto ST. */
vsprintf (ds_put_uninit (st, needed), format, args);
va_end (args);
}
- else
+ else
{
/* Some old libc's returned -1 when the destination string
was too short. */
va_copy (args, args_);
needed = vsnprintf (ds_end (st), avail, format, args);
va_end (args);
- }
+ }
st->ss.length += needed;
}
}
/* Appends CNT copies of character CH to ST. */
void
-ds_put_char_multiple (struct string *st, int ch, size_t cnt)
+ds_put_char_multiple (struct string *st, int ch, size_t cnt)
{
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