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swig/Source/DOH/Doh/string.c
Dave Beazley bff836ae6a *** empty log message *** 
git-svn-id: https://swig.svn.sourceforge.net/svnroot/swig/trunk/SWIG@9 626c5289-ae23-0410-ae9c-e8d60b6d4f22
1999-08-09 23:02:33 +00:00

692 lines
18 KiB
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/****************************************************************************
* DOH (Dynamic Object Hack)
*
* Author : David Beazley
*
* Department of Computer Science
* University of Chicago
* 1100 E 58th Street
* Chicago, IL 60637
* beazley@cs.uchicago.edu
*
* Please read the file LICENSE for the copyright and terms by which SWIG
* can be used and distributed.
****************************************************************************/
#include "doh.h"
/* ---------------------------------------------------------------------------
* $Header$
* string.c
*
* String support.
* --------------------------------------------------------------------------- */
typedef struct String {
DOHCOMMON;
int maxsize; /* Max size allocated */
int len; /* Current length */
int hashkey; /* Hash key value */
int sp; /* Current position */
int lsp; /* Last returned position */
char *str; /* String data */
char pb[4]; /* Pushback data */
int pbi;
} String;
/* Forward references */
void DelString(DOH *s);
DOH *CopyString(DOH *s);
void String_clear(DOH *s);
DOH *String_str(DOH *s);
int String_delitem(DOH *s, int where);
int String_len(DOH *s);
void String_appendfv(DOH *s, char *fmt, va_list ap);
int String_insertfv(DOH *s, int pos, char *fmt, va_list ap);
int String_insert(DOH *s, int pos, DOH *DOH);
void *String_data(DOH *s);
int String_cmp(DOH *, DOH *);
int String_hash(DOH *s);
int String_dump(DOH *s, DOH *out);
int String_read(DOH *s, void *buffer, int length);
int String_write(DOH *s, void *buffer, int length);
int String_getc(DOH *s);
int String_putc(DOH *s, int ch);
int String_ungetc(DOH *s, int ch);
int String_seek(DOH *s, long offset, int whence);
long String_tell(DOH *s);
static DohSequenceMethods StringSeqMethods = {
0, /* doh_getitem */
0, /* doh_setitem */
String_delitem, /* doh_delitem */
String_insert, /* doh_insitem */
0, /* doh_first */
0, /* doh_next */
};
static DohFileMethods StringFileMethods = {
String_read,
String_write,
String_putc,
String_getc,
String_ungetc,
String_seek,
String_tell,
0,
};
static DohObjInfo StringType = {
"String", /* objname */
sizeof(String), /* objsize */
DelString, /* sm_del */
CopyString, /* sm_copy */
String_clear, /* sm_clear */
String_str, /* sm_str */
String_data, /* doh_data */
String_dump, /* doh_dump */
String_len, /* sm_len */
String_hash, /* sm_hash */
String_cmp, /* doh_cmp */
0, /* doh_mapping */
&StringSeqMethods, /* doh_sequence */
&StringFileMethods,/* doh_file */
0,
0,
0,
0,
};
#define INIT_MAXSIZE 16
DohObjInfo *String_type() {
return &StringType;
}
/* -----------------------------------------------------------------------------
* void *String_data(DOH *so) - Return as a 'void *'
* ----------------------------------------------------------------------------- */
void *String_data(DOH *so) {
return (void *) ((String *) so)->str;
}
/* -----------------------------------------------------------------------------
* int String_dump(DOH *so, DOH *out)
*
* Serialize a string onto out
* ----------------------------------------------------------------------------- */
int String_dump(DOH *so, DOH *out) {
int nsent;
int ret;
String *s;
s = (String *) so;
nsent = 0;
while (nsent < s->len) {
ret = Write(out,s->str+nsent,(s->len-nsent));
if (ret < 0) return ret;
nsent += ret;
}
return nsent;
}
/* -----------------------------------------------------------------------------
* NewString(const char *c) - Create a new string
* ----------------------------------------------------------------------------- */
DOH *
NewString(char *s)
{
int l, max;
String *str;
str = (String *) DohMalloc(sizeof(String));
DohInit(str);
str->objinfo = &StringType;
str->hashkey = -1;
str->sp = 0;
str->lsp = 0;
str->pbi = 0;
str->line = 1;
max = INIT_MAXSIZE;
if (s) {
l = (int) strlen(s);
if ((l+1) > max) max = l+1;
}
str->str = (char *) malloc(max);
str->maxsize = max;
if (s) {
strcpy(str->str,s);
str->len = l;
} else {
str->str[0] = 0;
str->len = 0;
}
return (DOH *) str;
}
/* -----------------------------------------------------------------------------
* CopyString(DOH *s) - Copy a string
* ----------------------------------------------------------------------------- */
DOH *
CopyString(DOH *so) {
String *s;
int l, max;
String *str;
s = (String *) so;
str = (String *) DohMalloc(sizeof(String));
DohInit(str);
str->objinfo = &StringType;
str->hashkey = -1;
str->sp = 0;
str->lsp = 0;
str->line = 1;
str->pbi = 0;
max = s->maxsize;
str->str = (char *) malloc(max);
memmove(str->str, s->str, max);
str->maxsize= max;
str->len = s->len;
return (DOH *) str;
}
/* -----------------------------------------------------------------------------
* DelString(DOH *s) - Delete a string
* ----------------------------------------------------------------------------- */
void
DelString(DOH *so) {
String *s;
s = (String *) so;
assert(s->refcount <= 0);
free(s->str);
DohFree(s);
}
/* -----------------------------------------------------------------------------
* int String_check(DOH *s) - Check if s is a string
* ----------------------------------------------------------------------------- */
int
String_check(DOH *s)
{
char *c = (char *) s;
if (!s) return 0;
if (DohCheck(s)) {
if (((String *) c)->objinfo == &StringType)
return 1;
return 0;
}
else return 0;
}
/* -----------------------------------------------------------------------------
* int String_len(DOH *s) - Length of a string
* ----------------------------------------------------------------------------- */
int
String_len(DOH *so) {
String *s = (String *)so;
return s->len;
}
/* -----------------------------------------------------------------------------
* int String_cmp(DOH *s1, DOH *s2) - Compare two strings
* ----------------------------------------------------------------------------- */
int
String_cmp(DOH *so1, DOH *so2)
{
String *s1, *s2;
s1 = (String *) so1;
s2 = (String *) so2;
return strcmp(s1->str,s2->str);
}
/* -----------------------------------------------------------------------------
* int String_hash(DOH *s) - Compute string hash value
* ----------------------------------------------------------------------------- */
int String_hash(DOH *so) {
String *s = (String *) so;
char *c;
int i, h = 0, len;
if (s->hashkey >= 0) return s->hashkey;
c = s->str;
len = s->len > 50 ? 50 : s->len;
for (i = 0; i < len; i++) {
h = (((h << 5) + *(c++)));
}
h = h & 0x7fffffff;
s->hashkey = h;
return h;
}
/* -----------------------------------------------------------------------------
* static add(String *s, const char *newstr) - Append to s
* ----------------------------------------------------------------------------- */
static void
add(String *s, const char *newstr) {
int newlen, newmaxsize, l;
if (!newstr) return;
s->hashkey = -1;
l = (int) strlen(newstr);
newlen = s->len+l + 1;
if (newlen >= s->maxsize-1) {
newmaxsize = 2*s->maxsize;
if (newlen >= newmaxsize -1) newmaxsize = newlen + 1;
assert(s->str = (char *) realloc(s->str,newmaxsize));
s->maxsize = newmaxsize;
}
strcpy(s->str+s->len,newstr);
if (s->sp >= s->len) s->sp+=l;
s->len += l;
}
static void
addstr(String *s, String *s1) {
int newlen, newmaxsize, l;
s->hashkey = -1;
l = s1->len;
newlen = s->len+l + 1;
if (newlen >= s->maxsize-1) {
newmaxsize = 2*s->maxsize;
if (newlen >= newmaxsize -1) newmaxsize = newlen + 1;
assert(s->str = (char *) realloc(s->str,newmaxsize));
s->maxsize = newmaxsize;
}
memmove(s->str+s->len,s1->str,s1->len);
if (s->sp >= s->len) s->sp+=l;
s->len += l;
}
/* Add a single character to s */
void
String_addchar(DOH *so, char c) {
String *s = (String *) so;
s->hashkey = -1;
if ((s->len+1) > (s->maxsize-1)) {
assert(s->str = (char *) realloc(s->str,2*s->maxsize));
s->maxsize *= 2;
}
s->str[s->len] = c;
if (s->sp >= s->len) s->sp++;
s->len++;
}
/* Expand a string to accomodate a write */
void
String_expand(String *s, int width) {
if ((s->len + width) > (s->maxsize-1)) {
assert(s->str = (char *) realloc(s->str,(s->len + width)+1));
s->maxsize = s->len + width + 1;
}
}
/* -----------------------------------------------------------------------------
* void String_clear(DOH *s) - Clear a string
* ----------------------------------------------------------------------------- */
void
String_clear(DOH *so)
{
String *s;
s = (String *) so;
s->hashkey = -1;
s->len = 0;
s->str[0] = 0;
s->sp = 0;
s->lsp = 0;
s->line = 1;
s->pbi = 0;
}
void
raw_insert(String *s, int pos, char *data, int len)
{
char *nstr;
nstr = s->str;
s->hashkey = -1;
if (pos == DOH_END) {
add(s, data);
return;
}
if (pos < 0) pos = 0;
else if (pos > s->len) pos = s->len;
/* See if there is room to insert the new data */
while (s->maxsize <= s->len+len) {
assert(s->str = (char *) realloc(s->str,2*s->maxsize));
s->maxsize *= 2;
}
memmove(s->str+pos+len, s->str+pos, (s->len - pos));
memcpy(s->str+pos,data,len);
s->len += len;
s->str[s->len] = 0;
}
/* -----------------------------------------------------------------------------
* void String_insert(DOH *so, int pos, SO *str) - Insert a string
* ----------------------------------------------------------------------------- */
int
String_insert(DOH *so, int pos, DOH *str)
{
String *s, *s1;
char *c;
int len;
s = (String *) so;
assert(s->refcount <= 1);
s1 = (String *) str;
len = s1->len;
c = s1->str;
raw_insert(s,pos,c,len);
return 0;
}
/* -----------------------------------------------------------------------------
* int String_delitem(DOH *so, int pos)
*
* Delete an individual item
* ----------------------------------------------------------------------------- */
int String_delitem(DOH *so, int pos)
{
String *s = (String *) so;
if (pos == DOH_END) pos = s->len-1;
if (pos == DOH_BEGIN) pos = 0;
if (s->len == 0) return;
memmove(s->str+pos, s->str+pos+1, ((s->len-1) - pos));
s->len--;
s->str[s->len] = 0;
return 0;
}
/* -----------------------------------------------------------------------------
* DOH *String_str(DOH *so) - Returns a string (used by printing commands)
* ----------------------------------------------------------------------------- */
DOH *
String_str(DOH *so) {
DOH *nstr;
String *s = (String *) so;
nstr = CopyString(s);
return nstr;
}
/* -----------------------------------------------------------------------------
* int String_read(DOH *so, void *buffer, int len)
*
* Read data from the string
* ----------------------------------------------------------------------------- */
int
String_read(DOH *so, void *buffer, int len) {
int reallen, retlen;
int i;
char *cb;
String *s = (String *) so;
if (((s->sp-s->pbi) + len) > s->len) reallen = (s->len - (s->sp-s->pbi));
cb = (char *) buffer;
retlen = reallen;
/* Read the push-back buffer contents first */
while (reallen > 0) {
if (s->pbi <= 0) break;
*(cb++) = (char) s->pb[--s->pbi];
reallen--;
}
if (reallen > 0) {
memmove(cb, s->str+s->sp, reallen);
s->sp += reallen;
}
return retlen;
}
/* -----------------------------------------------------------------------------
* int String_write(DOH *so, void *buffer, int len)
*
* Write data to the string
* ----------------------------------------------------------------------------- */
int
String_write(DOH *so, void *buffer, int len) {
int reallen, newlen, newmaxsize;
String *s = (String *) so;
newlen = s->sp + len + 1;
if (newlen > s->maxsize) {
assert(s->str = (char *) realloc(s->str,newlen));
s->maxsize = newlen;
s->len = s->sp + len;
}
if (newlen > s->len) s->len = newlen;
memmove(s->str+s->sp,buffer,len);
s->sp += len;
s->pbi = 0;
return len;
}
/* -----------------------------------------------------------------------------
* int String_seek(DOH *so, long offset, int whence)
*
* Seek to a new position
* ----------------------------------------------------------------------------- */
int
String_seek(DOH *so, long offset, int whence) {
int pos;
String *s = (String *) so;
if (whence == SEEK_SET) pos = 0;
if (whence == SEEK_CUR) pos = s->sp;
if (whence == SEEK_END) {
pos = s->len;
offset = -offset;
}
s->sp = pos + offset;
if (s->sp < 0) s->sp = 0;
if (s->sp > s->len) s->sp = s->len;
s->pbi = 0;
return 0;
}
/* -----------------------------------------------------------------------------
* long String_seek(DOH *so)
*
* Return current position
* ----------------------------------------------------------------------------- */
long
String_tell(DOH *so) {
String *s = (String *) so;
return (long) (s->sp - s->pbi);
}
/* -----------------------------------------------------------------------------
* int String_putc(DOH *so, int ch)
*
* Put a character into the string.
* ----------------------------------------------------------------------------- */
int
String_putc(DOH *so, int ch) {
String *s = (String *) so;
if (s->sp >= s->len) {
String_addchar(s,(char) ch);
} else {
s->str[s->sp] = (char) ch;
s->sp++;
}
s->pbi = 0;
return ch;
}
/* -----------------------------------------------------------------------------
* int String_getc(DOH *so)
*
* Get a character from the string
* ----------------------------------------------------------------------------- */
int String_getc(DOH *so) {
String *s = (String *) so;
if (s->pbi) {
return (int) s->pb[--s->pbi];
}
if (s->sp >= s->len) return EOF;
else return (int) s->str[s->sp++];
}
/* -----------------------------------------------------------------------------
* int String_ungetc(DOH *so, int ch)
*
* Put a character back on to the input stream.
* ----------------------------------------------------------------------------- */
int String_ungetc(DOH *so, int ch) {
String *s = (String *) so;
int i;
if (ch == EOF) return ch;
if ((s->sp - s->pbi) <= 0) return EOF;
if (s->pbi == 4) {
s->pb[0] = s->pb[1];
s->pb[1] = s->pb[2];
s->pb[2] = s->pb[3];
s->pb[3] = (char) ch;
} else {
s->pb[s->pbi++] = (char) ch;
}
return ch;
}
/* -----------------------------------------------------------------------------
* static void replace_internal(String *str, char *token, char *rep, int flags, char *start, int count)
*
* Replaces token with rep. flags is as follows:
*
* REPLACE_ANY - Replace all occurrences
* REPLACE_NOQUOTE - Don't replace in quotes
* REPLACE_ID - Only replace valid identifiers
* REPLACE_FIRST - Only replace first occurrence
*
* start is a starting position. count is a count.
* ----------------------------------------------------------------------------- */
void replace_internal(String *str, char *token, char *rep, int flags, char *start, int count)
{
char *s, *c, *t;
int tokenlen;
int state;
/* Copy the current string representation */
s = str->str;
str->hashkey = -1;
tokenlen = strlen(token);
/* If a starting position was given, dump those characters first */
if (start) {
c = start;
} else {
c = s;
}
/* Now walk down the old string and search for tokens */
t = strstr(c,token);
if (t) {
str->len = 0;
str->str = (char *) malloc(str->maxsize);
if (start) {
char temp = *start;
*start = 0;
add(str,s);
*start = temp;
}
/* Depending on flags. We compare in different ways */
state = 0;
t = c;
while ((*c) && (count)) {
switch(state) {
case 0:
if (*c == *token) {
if (!(flags & DOH_REPLACE_ID)) {
if (strncmp(c,token,tokenlen) == 0) {
char temp = *c;
*c = 0;
add(str,t);
*c = temp;
add(str,rep);
c += (tokenlen-1);
t = c+1;
count--;
}
} else if (isalpha(*c) || (*c == '_') || (*c == '$')) {
char temp = *c;
*c = 0;
add(str,t);
*c = temp;
t = c;
state = 10;
}
} else if (flags & DOH_REPLACE_NOQUOTE) {
if (*c == '\"') state = 20;
else if (*c == '\'') state = 30;
}
break;
case 10: /* The start of an identifier */
if (isalnum(*c) || (*c == '_') || (*c == '$')) state = 10;
else {
char temp = *c;
*c = 0;
if (strcmp(token,t) == 0) {
add(str,rep);
count--;
} else {
add(str,t);
}
*c = temp;
t = c;
state = 0;
}
break;
case 20: /* A string */
if (*c == '\"') state = 0;
else if (*c == '\\') c++;
break;
case 30: /* A Single quoted string */
if (*c == '\'') state = 0;
else if (*c == '\\') c++;
break;
}
c++;
}
if ((count) && (state == 10)) {
if (strcmp(token,t) == 0) {
add(str,rep);
} else {
add(str,t);
}
} else {
add(str,t);
}
free(s);
}
}
/* -----------------------------------------------------------------------------
* void String_replace(DOH *str, DOH *token, DOH *rep, int flags)
* ----------------------------------------------------------------------------- */
void
String_replace(DOH *stro, DOH *token, DOH *rep, int flags)
{
int count = -1;
String *str;
if (!String_check(stro)) return;
str = (String *) stro;
assert(!str->refcount);
if (flags & DOH_REPLACE_FIRST) count = 1;
replace_internal(str,Char(token),Char(rep),flags,str->str,count);
}
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