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Java Programmer's Toolkit
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Java Programmer's Toolkit.iso
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gsview
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gvcprf.c
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1995-11-30
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/* Copyright (C) 1993, 1994, Russell Lang. All rights reserved.
This file is part of GSview.
This program is distributed with NO WARRANTY OF ANY KIND. No author
or distributor accepts any responsibility for the consequences of using it,
or for whether it serves any particular purpose or works at all, unless he
or she says so in writing. Refer to the GSview Free Public Licence
(the "Licence") for full details.
Every copy of GSview must include a copy of the Licence, normally in a
plain ASCII text file named LICENCE. The Licence grants you the right
to copy, modify and redistribute GSview, but only under certain conditions
described in the Licence. Among other things, the Licence requires that
the copyright notice and this notice be preserved on all copies.
*/
/* gvcprf.c */
/* Profile (INI file) routines Common to PM and possibly Windows */
/* Windows provides good Profile functions */
/* PM provides binary PM functions which don't allow easy editing */
/* of the INI file. Also emx08g crashed when calling PrfOpenProfile. */
/* To keep things consistent, these profile routines should write */
/* INI files compatible with Windows. */
/* Since the INI files are plain text, they are easy to edit */
#ifdef _Windows
#include "gvwin.h"
#else
#include "gvpm.h"
#endif
PROFILE *
profile_cleanup(PROFILE *prf)
{
struct prfsection *ps, *ns;
struct prfentry *pe, *ne;
if (prf == (PROFILE *)NULL)
return NULL;
if (prf->file)
fclose(prf->file);
ps = prf->section;
while (ps) { /* free this section */
pe = ps->entry;
while (pe) { /* free this entry */
if (pe->name)
free(pe->name);
if (pe->value)
free(pe->value);
ne = pe->next;
free(pe);
pe = ne;
}
if (ps->name)
free(ps->name);
ns = ps->next;
free(ps);
ps = ns;
}
if (prf->name)
free(prf->name);
free(prf);
return NULL;
}
PROFILE *
profile_open(char *filename)
{
char line[256];
PROFILE *prf;
struct prfsection *ps, *ns;
struct prfentry *pe, *ne;
char *p;
if ( (prf = (PROFILE *)malloc(sizeof(PROFILE))) == (PROFILE *)NULL )
return (PROFILE *)NULL;
prf->changed = FALSE;
prf->section = NULL;
if ( (prf->name = malloc(strlen(filename)+1)) == (char *)NULL )
return profile_cleanup(prf);
strcpy(prf->name, filename);
if ( (prf->file = fopen(filename, "r")) == (FILE *)NULL )
return prf; /* file doesn't exist - we may be creating it */
ps = ns = NULL;
pe = ne = NULL;
while (fgets(line, sizeof(line), prf->file)) {
if (line[0] == '[') { /* new section */
if ( (ns = (struct prfsection *)malloc(sizeof(struct prfsection)))
== (struct prfsection *)NULL )
return profile_cleanup(prf);
ns->name = NULL;
ns->entry = NULL;
ns->next = NULL;
if (ps)
ps->next = ns;
else
prf->section = ns;
ps = ns;
pe = NULL;
if ( (p = strchr(line+1, ']')) != (char *)NULL )
*p = '\0';
if ( (ns->name = (char *)malloc(strlen(line))) == (char *)NULL )
return profile_cleanup(prf);
strcpy(ns->name, line+1);
}
else { /* new entry */
if (ns == (struct prfsection *)NULL)
continue;
if ( (p = strchr(line, '\n')) != (char *)NULL )
*p = '\0';
if (line[0] == '\0')
continue;
if ( (ne = (struct prfentry *)malloc(sizeof(struct prfentry)))
== (struct prfentry *)NULL )
return profile_cleanup(prf);
ne->name = NULL;
ne->value = NULL;
ne->next = NULL;
if (pe)
pe->next = ne;
else
ns->entry = ne;
pe = ne;
if (line[0] == ';') { /* comment line */
if ( (ne->value = (char *)malloc(strlen(line)+1)) == (char *)NULL )
return profile_cleanup(prf);
strcpy(ne->value, line);
}
else { /* a real entry */
strtok(line, "=");
if ( (ne->name = (char *)malloc(strlen(line)+1)) == (char *)NULL )
return profile_cleanup(prf);
strcpy(ne->name, line);
if ( (p = strtok(NULL, "=")) == (char *)NULL )
continue;
if ( (ne->value = (char *)malloc(strlen(p)+1)) == (char *)NULL )
return profile_cleanup(prf);
strcpy(ne->value, p);
}
}
}
fclose(prf->file);
prf->file = NULL;
return prf;
}
int
profile_read_string(PROFILE *prf, char *section, char *entry, char *def, char *buffer, int len)
{
struct prfsection *ps;
struct prfentry *pe;
int count;
char *p;
if (prf == (PROFILE *)NULL)
return 0;
if (buffer == (char *)NULL)
return 0;
ps = prf->section;
if (section == NULL) {
/* return all section names */
count = 0;
p = buffer;
*p = '\0';
while (ps) {
if ( ps->name && (count + strlen(ps->name) + 2 < len) ) {
strcpy(p, ps->name);
count += strlen(ps->name) + 1;
p = buffer + count;
}
ps = ps->next;
}
*p = '\0';
return count;
}
while (ps) {
if (strcmp(ps->name, section) == 0)
break;
ps = ps->next;
}
if (ps == (struct prfsection *)NULL) {
strncpy(buffer, def, len);
return min(strlen(buffer), len);
}
/* found section */
pe = ps->entry;
if (entry == NULL) {
/* return all entry names */
count = 0;
p = buffer;
*p = '\0';
while (pe) {
if ( pe->name && (count + strlen(pe->name) + 2 < len) ) {
strcpy(p, pe->name);
count += strlen(pe->name) + 1;
p = buffer + count;
}
pe = pe->next;
}
*p = '\0';
return count;
}
while (pe) {
if (pe->name && (strcmp(pe->name, entry) == 0))
break;
pe = pe->next;
}
if ( (pe == (struct prfentry *)NULL) ||
(pe->value == (char *)NULL) ) {
strncpy(buffer, def, len);
return min(strlen(buffer), len);
}
/* return value */
strncpy(buffer, pe->value, len); /* got it! */
return min(strlen(buffer), len);
}
BOOL
profile_write_string(PROFILE *prf, char *section, char *entry, char *value)
{
struct prfsection *ps, *ns;
struct prfentry *pe, *ne;
if (prf == (PROFILE *)NULL)
return FALSE;
ns = prf->section;
ps = NULL;
while (ns) {
if (strcmp(ns->name, section) == 0)
break;
ps = ns;
ns = ns->next;
}
if (ns == (struct prfsection *)NULL) {
/* add section */
if ( (ns = (struct prfsection *)malloc(sizeof(struct prfsection)))
== (struct prfsection *)NULL )
return FALSE;
ns->name = NULL;
ns->entry = NULL;
ns->next = NULL;
if (ps)
ps->next = ns;
else
prf->section = ns;
ps = ns;
pe = NULL;
if ( (ns->name = (char *)malloc(strlen(section)+1)) == (char *)NULL )
return FALSE;
strcpy(ns->name, section);
}
ne = ns->entry;
pe = NULL;
/* should add code to remove section here if entry==NULL */
while (ne) {
if (ne->name && (strcmp(ne->name, entry) == 0))
break;
pe = ne;
ne = ne->next;
}
if (ne == (struct prfentry *)NULL) {
/* add new entry */
if ( (ne = (struct prfentry *)malloc(sizeof(struct prfentry)))
== (struct prfentry *)NULL )
return FALSE;
ne->name = NULL;
ne->value = NULL;
ne->next = NULL;
if (pe)
pe->next = ne;
else
ns->entry = ne;
pe = ne;
if ( (ne->name = (char *)malloc(strlen(entry)+1)) == (char *)NULL )
return FALSE;
strcpy(ne->name, entry);
}
if (ne->value != (char *)NULL)
free(ne->value); /* release old value */
if (value) { /* change value */
if ( (ne->value = (char *)malloc(strlen(value)+1)) == (char *)NULL )
return FALSE;
strcpy(ne->value, value);
}
else { /* delete entry */
free(ne->name);
if (pe)
pe->next = ne->next;
else
ns->entry = ne->next;
free(ne);
}
prf->changed = TRUE;
return TRUE;
}
BOOL
profile_close(PROFILE *prf)
{
struct prfsection *ps;
struct prfentry *pe;
if (prf == (PROFILE *)NULL)
return FALSE;
if (prf->changed) {
if ( (prf->file = fopen(prf->name, "w")) == (FILE *)NULL ) {
profile_cleanup(prf);
return FALSE;
}
ps = prf->section;
while (ps) {
if (ps->name)
fprintf(prf->file, "[%s]\n", ps->name);
pe = ps->entry;
while (pe) {
if (pe->name) {
if (pe->value)
fprintf(prf->file, "%s=%s\n", pe->name, pe->value);
else
fprintf(prf->file, "%s=\n", pe->name);
}
else {
if (pe->value)
fprintf(prf->file, "%s\n", pe->value);
}
pe = pe->next;
}
fprintf(prf->file, "\n");
ps = ps->next;
}
}
profile_cleanup(prf);
return TRUE;
}