#include <config.h>
#include "str.h"
-#include <assert.h>
+#include "error.h"
#include <ctype.h>
#include <limits.h>
#include <stdlib.h>
return 0;
}
-/* Compares S0 of length S0L to S1 of length S1L. The shorter string
- is considered to be padded with spaces to the length of the
- longer. */
+/* Compares A of length A_LEN to B of length B_LEN. The shorter
+ string is considered to be padded with spaces to the length of
+ the longer. */
int
-st_compare_pad (const char *s0, int s0l, const char *s1, int s1l)
+st_compare_pad (const char *a, size_t a_len, const char *b, size_t b_len)
{
- /* 254 spaces. */
- static char blanks[254] =
- " "
- " "
- " "
- " "
- " ";
-
- int diff = s0l - s1l;
- int r;
+ size_t min_len;
+ int result;
- if (diff == 0)
- {
- if (s0l == 0)
- return 0;
- return memcmp (s0, s1, s0l);
- }
- else if (diff > 0)
+ min_len = a_len < b_len ? a_len : b_len;
+ result = memcmp (a, b, min_len);
+ if (result != 0)
+ return result;
+ else
{
- /* s0l > s1l */
- if (s1l)
- {
- r = memcmp (s0, s1, s1l);
- if (r)
- return r;
- }
- return memcmp (&s0[s1l], blanks, diff);
- }
- else
- /* diff<0 */
- {
- /* s0l < s1l */
- if (s0l)
- {
- r = memcmp (s0, s1, s0l);
- if (r)
- return r;
- }
- return memcmp (blanks, &s1[s0l], -diff);
+ size_t idx;
+
+ if (a_len < b_len)
+ {
+ for (idx = min_len; idx < b_len; idx++)
+ if (' ' != b[idx])
+ return ' ' > b[idx] ? 1 : -1;
+ }
+ else
+ {
+ for (idx = min_len; idx < a_len; idx++)
+ if (a[idx] != ' ')
+ return a[idx] > ' ' ? 1 : -1;
+ }
+ return 0;
}
}
st_bare_pad_len_copy (char *dest, const char *src, size_t n, size_t len)
{
if (len >= n)
- memcpy (dest, src, n);
+ memmove (dest, src, n);
else
{
- memcpy (dest, src, len);
+ memmove (dest, src, len);
memset (&dest[len], ' ', n - len);
}
}
}
}
\f
-/* Initializes ST inside pool POOL (which may be a null pointer) with
- initial contents S. */
+/* Initializes ST with initial contents S. */
void
-ds_create (struct pool *pool, struct string *st, const char *s)
+ds_create (struct string *st, const char *s)
{
- st->pool = pool;
st->length = strlen (s);
- st->size = 8 + st->length * 2;
- st->string = pool_malloc (pool, st->size + 1);
+ st->capacity = 8 + st->length * 2;
+ st->string = xmalloc (st->capacity + 1);
strcpy (st->string, s);
}
-/* Initializes ST inside POOL (which may be null), making room for at
- least SIZE characters. */
+/* Initializes ST, making room for at least CAPACITY characters. */
void
-ds_init (struct pool *pool, struct string *st, size_t size)
+ds_init (struct string *st, size_t capacity)
{
- st->pool = pool;
st->length = 0;
- if (size > 8)
- st->size = size;
+ if (capacity > 8)
+ st->capacity = capacity;
else
- st->size = 8;
- st->string = pool_malloc (pool, st->size + 1);
+ st->capacity = 8;
+ st->string = xmalloc (st->capacity + 1);
}
/* Replaces the contents of ST with STRING. STRING may overlap with
void
ds_replace (struct string *st, const char *string)
{
- char *s = st->string;
- st->string = NULL;
- ds_create (st->pool, st, string);
- pool_free (st->pool, s);
+ size_t new_length = strlen (string);
+ if (new_length > st->capacity)
+ {
+ /* The new length is longer than the allocated length, so
+ there can be no overlap. */
+ st->length = 0;
+ ds_concat (st, string, new_length);
+ }
+ else
+ {
+ /* Overlap is possible, but the new string will fit in the
+ allocated space, so we can just copy data. */
+ st->length = new_length;
+ memmove (st->string, string, st->length);
+ }
}
/* Frees ST. */
void
ds_destroy (struct string *st)
{
- pool_free (st->pool, st->string);
+ free (st->string);
}
/* Truncates ST to zero length. */
st->length = 0;
}
-/* Ensures that ST can hold at least MIN_SIZE characters plus a null
+/* Pad ST on the right with copies of PAD until ST is at least
+ 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)
+{
+ assert (st != NULL);
+ if (st->length < length)
+ {
+ if (st->capacity < length)
+ ds_extend (st, length);
+ memset (&st->string[st->length], pad, length - st->length);
+ st->length = length;
+ }
+}
+
+/* Ensures that ST can hold at least MIN_CAPACITY characters plus a null
terminator. */
void
-ds_extend (struct string *st, size_t min_size)
+ds_extend (struct string *st, size_t min_capacity)
{
- if (min_size > st->size)
+ if (min_capacity > st->capacity)
{
- st->size *= 2;
- if (st->size < min_size)
- st->size = min_size * 2;
+ st->capacity *= 2;
+ if (st->capacity < min_capacity)
+ st->capacity = min_capacity * 2;
- st->string = pool_realloc (st->pool, st->string, st->size + 1);
+ st->string = xrealloc (st->string, st->capacity + 1);
}
}
-/* Shrink ST to the minimum size need to contain its content. */
+/* Shrink ST to the minimum capacity need to contain its content. */
void
ds_shrink (struct string *st)
{
- if (st->size != st->length)
+ if (st->capacity != st->length)
{
- st->size = st->length;
- st->string = pool_realloc (st->pool, st->string, st->size + 1);
+ st->capacity = st->length;
+ st->string = xrealloc (st->string, st->capacity + 1);
}
}
/* Returns the allocation size of ST. */
size_t
-ds_size (const struct string *st)
+ds_capacity (const struct string *st)
{
- return st->size;
+ return st->capacity;
}
/* Returns the value of ST as a null-terminated string. */
char *
-ds_value (const struct string *st)
+ds_c_str (const struct string *st)
{
((char *) st->string)[st->length] = '\0';
return st->string;
}
+/* Returns the string data inside ST. */
+char *
+ds_data (const struct string *st)
+{
+ return st->string;
+}
+
/* Returns a pointer to the null terminator ST.
- This might not be an actual null character unless ds_value() has
+ This might not be an actual null character unless ds_c_str() has
been called since the last modification to ST. */
char *
ds_end (const struct string *st)
/* Concatenates S onto ST. */
void
-ds_concat (struct string *st, const char *s)
+ds_puts (struct string *st, const char *s)
{
size_t s_len;
/* Concatenates LEN characters from BUF onto ST. */
void
-ds_concat_buffer (struct string *st, const char *buf, size_t len)
+ds_concat (struct string *st, const char *buf, size_t len)
{
ds_extend (st, st->length + len);
memcpy (st->string + st->length, buf, len);
int avail, needed;
- avail = st->size - st->length + 1;
+ avail = st->capacity - st->length + 1;
needed = vsnprintf (st->string + st->length, avail, format, args);
else
while (needed == -1)
{
- ds_extend (st, (st->size + 1) * 2);
- avail = st->size - st->length + 1;
+ ds_extend (st, (st->capacity + 1) * 2);
+ avail = st->capacity - st->length + 1;
needed = vsnprintf (st->string + st->length, avail, format, args);
/* Appends character CH to ST. */
void
-ds_putchar (struct string *st, int ch)
+ds_putc (struct string *st, int ch)
{
- if (st->length == st->size)
+ if (st->length == st->capacity)
ds_extend (st, st->length + 1);
st->string[st->length++] = ch;
}
-/* Reads a newline-terminated line from STREAM into ST.
+/* 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 1 if a line is successfully read, or 0 if no characters at
all were read before an I/O error or end of file was
encountered. */
int
-ds_getline (struct string *st, FILE *stream)
+ds_gets (struct string *st, FILE *stream)
{
int c;
for (;;)
{
- ds_putchar (st, c);
+ ds_putc (st, c);
if (c == '\n')
return 1;
/* Read the first line. */
ds_clear (st);
where->line_number++;
- if (!ds_getline (st, stream))
+ if (!ds_gets (st, stream))
return 0;
/* Read additional lines, if any. */
{
/* Remove trailing whitespace. */
{
- char *s = ds_value (st);
+ char *s = ds_c_str (st);
size_t len = ds_length (st);
while (len > 0 && isspace ((unsigned char) s[len - 1]))
}
/* Check for trailing \. Remove if found, bail otherwise. */
- if (ds_length (st) == 0 || ds_value (st)[ds_length (st) - 1] != '\\')
+ if (ds_length (st) == 0 || ds_c_str (st)[ds_length (st) - 1] != '\\')
break;
ds_truncate (st, ds_length (st) - 1);
/* Append another line and go around again. */
{
- int success = ds_getline (st, stream);
+ int success = ds_gets (st, stream);
where->line_number++;
if (!success)
return 1;
char *cp;
int quote = 0;
- for (cp = ds_value (st); *cp; cp++)
+ for (cp = ds_c_str (st); *cp; cp++)
if (quote)
{
if (*cp == quote)
quote = *cp;
else if (*cp == '#')
{
- ds_truncate (st, cp - ds_value (st));
+ ds_truncate (st, cp - ds_c_str (st));
break;
}
}
\f
/* Lengthed strings. */
-/* Creates a new lengthed string LS in POOL with contents as a copy of
+/* Creates a new lengthed string LS with contents as a copy of
S. */
void
-ls_create (struct pool *pool, struct len_string *ls, const char *s)
+ls_create (struct fixed_string *ls, const char *s)
{
ls->length = strlen (s);
- ls->string = pool_alloc (pool, ls->length + 1);
+ ls->string = xmalloc (ls->length + 1);
memcpy (ls->string, s, ls->length + 1);
}
-/* Creates a new lengthed string LS in POOL with contents as a copy of
+/* Creates a new lengthed string LS with contents as a copy of
BUFFER with length LEN. */
void
-ls_create_buffer (struct pool *pool, struct len_string *ls,
+ls_create_buffer (struct fixed_string *ls,
const char *buffer, size_t len)
{
ls->length = len;
- ls->string = pool_malloc (pool, len + 1);
+ ls->string = xmalloc (len + 1);
memcpy (ls->string, buffer, len);
ls->string[len] = '\0';
}
/* Sets the fields of LS to the specified values. */
void
-ls_init (struct len_string *ls, const char *string, size_t length)
+ls_init (struct fixed_string *ls, const char *string, size_t length)
{
ls->string = (char *) string;
ls->length = length;
/* Copies the fields of SRC to DST. */
void
-ls_shallow_copy (struct len_string *dst, const struct len_string *src)
+ls_shallow_copy (struct fixed_string *dst, const struct fixed_string *src)
{
*dst = *src;
}
-/* Frees the memory in POOL backing LS. */
+/* Frees the memory backing LS. */
void
-ls_destroy (struct pool *pool, struct len_string *ls)
+ls_destroy (struct fixed_string *ls)
{
- pool_free (pool, ls->string);
+ free (ls->string);
}
/* Sets LS to a null pointer value. */
void
-ls_null (struct len_string *ls)
+ls_null (struct fixed_string *ls)
{
ls->string = NULL;
}
/* Returns nonzero only if LS has a null pointer value. */
int
-ls_null_p (const struct len_string *ls)
+ls_null_p (const struct fixed_string *ls)
{
return ls->string == NULL;
}
/* Returns nonzero only if LS is a null pointer or has length 0. */
int
-ls_empty_p (const struct len_string *ls)
+ls_empty_p (const struct fixed_string *ls)
{
return ls->string == NULL || ls->length == 0;
}
/* Returns the length of LS, which must not be null. */
size_t
-ls_length (const struct len_string *ls)
+ls_length (const struct fixed_string *ls)
{
return ls->length;
}
/* Returns a pointer to the character string in LS. */
char *
-ls_value (const struct len_string *ls)
+ls_c_str (const struct fixed_string *ls)
{
return (char *) ls->string;
}
/* Returns a pointer to the null terminator of the character string in
LS. */
char *
-ls_end (const struct len_string *ls)
+ls_end (const struct fixed_string *ls)
{
return (char *) (ls->string + ls->length);
}
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