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#include <stdio.h>
#include <string.h>
#include <stdlib.h>
#include <ctype.h>
#include "owl.h"
static const char fileIdent[] = "$Id: text.c,v 1.12 2004/03/18 05:04:40 nygren Exp $";
/* start with line aline (where the first line is 1) and print 'lines'
* lines
*/
int owl_text_truncate_lines(char *out, char *in, int aline, int lines)
{
char *ptr1, *ptr2;
int i;
strcpy(out, "");
if (aline==0) aline=1; /* really illegal use */
/* find the starting line */
ptr1=in;
if (aline!=1) {
for (i=0; i<aline-1; i++) {
ptr1=strchr(ptr1, '\n');
if (!ptr1) return(-1);
ptr1++;
}
}
/* ptr1 now holds the starting point */
/* copy in the next 'lines' lines */
if (lines<1) return(-1);
for (i=0; i<lines; i++) {
ptr2=strchr(ptr1, '\n');
if (!ptr2) {
strcat(out, ptr1);
return(-1);
}
strncat(out, ptr1, ptr2-ptr1+1);
ptr1=ptr2+1;
}
return(0);
}
/* the first column is column 0. The message is expected to end in a
* new line for now */
void owl_text_truncate_cols(char *out, char *in, int acol, int bcol)
{
char *ptr1, *ptr2, *tmpbuff, *last;
int len;
tmpbuff=owl_malloc(strlen(in)+20);
strcpy(tmpbuff, "");
last=in+strlen(in)-1;
ptr1=in;
while (ptr1<last) {
ptr2=strchr(ptr1, '\n');
if (!ptr2) {
/* but this shouldn't happen if we end in a \n */
break;
}
if (ptr2==ptr1) {
strcat(tmpbuff, "\n");
ptr1++;
continue;
}
/* we need to check that we won't run over here */
if ( (ptr2-ptr1) < (bcol-acol) ) {
len=ptr2-(ptr1+acol);
} else {
len=bcol-acol;
}
if ((ptr1+len)>=last) {
len-=last-(ptr1+len);
}
strncat(tmpbuff, ptr1+acol, len);
strcat(tmpbuff, "\n");
ptr1=ptr2+1;
}
strcpy(out, tmpbuff);
owl_free(tmpbuff);
}
void owl_text_indent(char *out, char *in, int n)
{
char *ptr1, *ptr2, *last;
int i;
strcpy(out, "");
last=in+strlen(in)-1;
ptr1=in;
while (ptr1<=last) {
for (i=0; i<n; i++) {
strcat(out, " ");
}
ptr2=strchr(ptr1, '\n');
if (!ptr2) {
strcat(out, ptr1);
break;
} else {
strncat(out, ptr1, ptr2-ptr1+1);
}
ptr1=ptr2+1;
}
}
int owl_text_num_lines(char *in)
{
int lines, i;
lines=0;
for (i=0; in[i]!='\0'; i++) {
if (in[i]=='\n') lines++;
}
/* if the last char wasn't a \n there's one more line */
if (i>0 && in[i-1]!='\n') lines++;
return(lines);
}
/* caller must free the return */
char *owl_text_htmlstrip(char *in)
{
char *ptr1, *end, *ptr2, *ptr3, *out, *out2;
out=owl_malloc(strlen(in)+30);
strcpy(out, "");
ptr1=in;
end=in+strlen(in);
while(ptr1<end) {
/* look for an open bracket */
ptr2=strchr(ptr1, '<');
/* if none, copy in from here to end and exit */
if (ptr2==NULL) {
strcat(out, ptr1);
break;
}
/* otherwise copy in everything before the open bracket */
if (ptr2>ptr1) {
strncat(out, ptr1, ptr2-ptr1);
}
/* find the close bracket */
ptr3=strchr(ptr2, '>');
/* if there is no close, copy as you are and exit */
if (!ptr3) {
strcat(out, ptr2);
break;
}
/* look for things we know */
if (!strncasecmp(ptr2, "<BODY ", 6) ||
!strncasecmp(ptr2, "<FONT", 5) ||
!strncasecmp(ptr2, "<HTML", 5) ||
!strncasecmp(ptr2, "</FONT", 6) ||
!strncasecmp(ptr2, "</HTML", 6) ||
!strncasecmp(ptr2, "</BODY", 6)) {
/* advance to beyond the angle brakcet and go again */
ptr1=ptr3+1;
continue;
}
if (!strncasecmp(ptr2, "<BR>", 4)) {
strcat(out, "\n");
ptr1=ptr3+1;
continue;
}
/* if it wasn't something we know, copy to the > and go again */
strncat(out, ptr2, ptr3-ptr2+1);
ptr1=ptr3+1;
}
out2=owl_text_substitute(out, "<", "<");
owl_free(out);
out=owl_text_substitute(out2, ">", ">");
owl_free(out2);
out2=owl_text_substitute(out, "&", "&");
owl_free(out);
out=owl_text_substitute(out2, """, "\"");
owl_free(out2);
out2=owl_text_substitute(out, " ", " ");
owl_free(out);
out=owl_text_substitute(out2, " ", " ");
owl_free(out2);
out2=owl_text_substitute(out, " ", " ");
owl_free(out);
out=owl_text_substitute(out2, "&endash;", "--");
owl_free(out2);
out2=owl_text_substitute(out, "&emdash;", "---");
owl_free(out);
return(out2);
}
/* caller must free the return */
char *owl_text_wordwrap(char *in, int col)
{
char *out;
int cur, lastspace, len, lastnewline;
out=owl_strdup(in);
len=strlen(in);
cur=0;
lastspace=-1;
lastnewline=-1;
while (cur<(len-1)) {
if (out[cur]==' ') {
lastspace=cur;
cur++;
continue;
} else if (out[cur]=='\n') {
lastnewline=cur;
cur++;
continue;
}
/* do we need to wrap? */
if ( (cur-(lastnewline+1)) > col ) {
if (lastspace==-1 ||
(lastnewline>0 && (lastspace<=lastnewline))) {
/* we can't help, sorry */
cur++;
continue;
}
/* turn the last space into a newline */
out[lastspace]='\n';
lastnewline=lastspace;
lastspace=-1;
cur++;
continue;
}
cur++;
continue;
}
return(out);
}
/* this modifies 'in' */
void owl_text_wordunwrap(char *in)
{
int i, j;
j=strlen(in);
for (i=0; i<j; i++) {
if ( (in[i]=='\n') &&
((i>0) && (i<(j-1))) &&
(in[i-1]!='\n') &&
(in[i+1]!='\n') )
in[i]=' ';
}
}
/* exactly like strstr but case insensitive */
char *stristr(char *a, char *b)
{
char *x, *y, *ret;
if ((x=owl_strdup(a))==NULL) return(NULL);
if ((y=owl_strdup(b))==NULL) return(NULL);
downstr(x);
downstr(y);
ret=strstr(x, y);
if (ret==NULL) {
owl_free(x);
owl_free(y);
return(NULL);
}
ret=ret-x+a;
owl_free(x);
owl_free(y);
return(ret);
}
/* return 1 if a string is only whitespace, otherwise 0 */
int only_whitespace(char *s)
{
int i;
for (i=0; s[i]; i++) {
if (!isspace((int) s[i])) return(0);
}
return(1);
}
char *owl_getquoting(char *line)
{
if (line[0]=='\0') return("'");
if (strchr(line, '\'')) return("\"");
if (strchr(line, '"')) return("'");
if (strchr(line, ' ')) return("'");
return("");
}
/* Return a string with any occurances of 'from' replaced with 'to'.
* Does not currently handle backslash quoting, but may in the future.
* Caller must free returned string.
*/
char *owl_text_substitute(char *in, char *from, char *to)
{
char *out;
int outlen, tolen, fromlen, inpos=0, outpos=0;
if (!*from) return owl_strdup(in);
outlen = strlen(in)+1;
tolen = strlen(to);
fromlen = strlen(from);
out = malloc(outlen);
while (in[inpos]) {
if (!strncmp(in+inpos, from, fromlen)) {
outlen += tolen;
out = owl_realloc(out, outlen);
strcpy(out+outpos, to);
inpos += fromlen;
outpos += tolen;
} else {
out[outpos] = in[inpos];
inpos++; outpos++;
}
}
out[outpos] = '\0';
return(out);
}
/* replace all instances of character a in buff with the character
* b. buff must be null terminated.
*/
void owl_text_tr(char *buff, char a, char b)
{
int i;
owl_function_debugmsg("In: %s", buff);
for (i=0; buff[i]!='\0'; i++) {
if (buff[i]==a) buff[i]=b;
}
owl_function_debugmsg("Out: %s", buff);
}
/* Return a string which is like 'in' except that every instance of
* any character in 'toquote' found in 'in' is preceeded by the string
* 'quotestr'. For example, owl_text_quote(in, "+*.", "\") would
* place a backslash before every '+', '*' or '.' in 'in'. It is
* permissable for a character in 'quotestr' to be in 'toquote'.
* On success returns the string, on error returns NULL.
*/
char *owl_text_quote(char *in, char *toquote, char *quotestr)
{
int i, x, r, place;
int in_len, toquote_len, quotestr_len;
char *out;
in_len=strlen(in);
toquote_len=strlen(toquote);
quotestr_len=strlen(quotestr);
out=owl_malloc((in_len*quotestr_len)+30);
place=0;
for (i=0; i<in_len; i++) {
/* check if it's a character that needs quoting */
for (x=0; x<toquote_len; x++) {
if (in[i]==toquote[x]) {
/* quote it */
for (r=0; r<quotestr_len; r++) {
out[place+r]=quotestr[r];
}
place+=quotestr_len;
break;
}
}
/* either way, we now copy over the character */
out[place]=in[i];
place++;
}
out[place]='\0';
return(out);
}
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