--- /dev/null
+#include <stdio.h>
+#include <stdlib.h>
+#include <string.h>
+#include <ctype.h>
+#ifdef WIN32
+#include <malloc.h>
+#else
+#include <alloca.h>
+#endif
+#include "optcfg.h"
+
+struct optcfg {
+ struct optcfg_option *optlist;
+
+ optcfg_opt_callback opt_func;
+ void *opt_cls;
+ optcfg_arg_callback arg_func;
+ void *arg_cls;
+
+ int err_abort;
+
+ /* argument parsing state */
+ char **argv;
+ int argidx;
+ int disable_opt;
+
+ /* config file parsing state */
+ const char *cfg_fname;
+ int cfg_nline;
+ char *cfg_value;
+};
+
+static int get_opt(struct optcfg *oc, const char *s, int *disable_opt);
+static char *skip_spaces(char *s);
+static void strip_comments(char *s);
+static void strip_trailing_spaces(char *s);
+static char *parse_keyval(char *line);
+
+
+struct optcfg *optcfg_init(struct optcfg_option *optv)
+{
+ struct optcfg *oc;
+
+ if(!(oc = calloc(1, sizeof *oc))) {
+ return 0;
+ }
+ oc->optlist = optv;
+ oc->err_abort = 1;
+ return oc;
+}
+
+void optcfg_destroy(struct optcfg *oc)
+{
+ memset(oc, 0, sizeof *oc);
+ free(oc);
+}
+
+void optcfg_set_opt_callback(struct optcfg *oc, optcfg_opt_callback func, void *cls)
+{
+ oc->opt_func = func;
+ oc->opt_cls = cls;
+}
+
+void optcfg_set_arg_callback(struct optcfg *oc, optcfg_arg_callback func, void *cls)
+{
+ oc->arg_func = func;
+ oc->arg_cls = cls;
+}
+
+void optcfg_set_error_action(struct optcfg *oc, int act)
+{
+ if(act == OPTCFG_ERROR_FAIL) {
+ oc->err_abort = 1;
+ } else if(act == OPTCFG_ERROR_IGNORE) {
+ oc->err_abort = 0;
+ }
+}
+
+int optcfg_parse_args(struct optcfg *oc, int argc, char **argv)
+{
+ int i;
+
+ oc->argv = argv;
+
+ for(i=1; i<argc; i++) {
+ oc->argidx = i;
+
+ if(argv[i][0] == '-') {
+ if(oc->opt_func) {
+ int o = get_opt(oc, argv[i], &oc->disable_opt);
+ if(o == -1 || oc->opt_func(oc, o, oc->opt_cls) == -1) {
+ if(oc->err_abort) {
+ fprintf(stderr, "unexpected option: %s\n", argv[i]);
+ return -1;
+ }
+ }
+ } else {
+ fprintf(stderr, "unexpected option: %s\n", argv[i]);
+ if(oc->err_abort) {
+ return -1;
+ }
+ }
+ } else {
+ if(oc->arg_func) {
+ if(oc->arg_func(oc, argv[i], oc->arg_cls) == -1) {
+ if(oc->err_abort) {
+ fprintf(stderr, "unexpected argument: %s\n", argv[i]);
+ return -1;
+ }
+ }
+ } else {
+ fprintf(stderr, "unexpected argument: %s\n", argv[i]);
+ if(oc->err_abort) {
+ return -1;
+ }
+ }
+ }
+
+ i = oc->argidx;
+ }
+
+ oc->argidx = 0; /* done parsing args */
+ return 0;
+}
+
+int optcfg_parse_config_file(struct optcfg *oc, const char *fname)
+{
+ int res;
+ FILE *fp = fopen(fname, "rb");
+ if(!fp) {
+ return -1;
+ }
+
+ oc->cfg_fname = fname;
+ res = optcfg_parse_config_stream(oc, fp);
+ oc->cfg_fname = 0;
+ fclose(fp);
+ return res;
+}
+
+int optcfg_parse_config_stream(struct optcfg *oc, FILE *fp)
+{
+ char buf[512];
+
+ oc->cfg_nline = 0;
+ while(fgets(buf, sizeof buf, fp)) {
+ ++oc->cfg_nline;
+
+ if(optcfg_parse_config_line(oc, buf) == -1) {
+ if(oc->err_abort) {
+ return -1;
+ }
+ }
+ }
+ return 0;
+}
+
+int optcfg_parse_config_line(struct optcfg *oc, const char *line)
+{
+ int opt, len;
+ char *start, *val, *buf;
+
+ len = strlen(line);
+ buf = alloca(len + 1);
+ memcpy(buf, line, len + 1);
+
+ start = skip_spaces(buf);
+ strip_comments(start);
+ strip_trailing_spaces(start);
+ if(!*start) {
+ return 0;
+ }
+
+ if(!(val = parse_keyval(start))) {
+ fprintf(stderr, "error parsing %s line %d: invalid syntax\n", oc->cfg_fname ? oc->cfg_fname : "", oc->cfg_nline);
+ return -1;
+ }
+ oc->cfg_value = val;
+ if((opt = get_opt(oc, start, 0)) == -1) {
+ fprintf(stderr, "error parsing %s line %d: unknown option: %s\n", oc->cfg_fname ? oc->cfg_fname : "",
+ oc->cfg_nline, start);
+ return -1;
+ }
+
+ if(oc->opt_func) {
+ if(oc->opt_func(oc, opt, oc->opt_cls) == -1) {
+ return -1;
+ }
+ }
+ oc->cfg_value = 0;
+ return 0;
+}
+
+int optcfg_enabled_value(struct optcfg *oc, int *enabledp)
+{
+ if(oc->argidx) {
+ *enabledp = ~oc->disable_opt & 1;
+ } else {
+ char *val = optcfg_next_value(oc);
+ if(optcfg_bool_value(val, enabledp) == -1) {
+ return -1;
+ }
+ }
+ return 0;
+}
+
+
+char *optcfg_next_value(struct optcfg *oc)
+{
+ if(oc->argidx) { /* we're in the middle of parsing arguments, so get the next one */
+ return oc->argv[++oc->argidx];
+ }
+ if(oc->cfg_value) {
+ char *val = oc->cfg_value;
+ oc->cfg_value = 0;
+ return val;
+ }
+ return 0;
+}
+
+void optcfg_print_options(struct optcfg *oc)
+{
+ int i;
+ for(i=0; oc->optlist[i].opt != -1; i++) {
+ struct optcfg_option *opt = oc->optlist + i;
+
+ if(opt->c) {
+ printf(" -%c", opt->c);
+ } else {
+ printf(" ");
+ }
+ if(opt->s) {
+ printf("%c-%s: ", opt->c ? ',' : ' ', opt->s);
+ } else {
+ printf(": ");
+ }
+ printf("%s\n", opt->desc ? opt->desc : "undocumented");
+ }
+}
+
+int optcfg_bool_value(char *s, int *valret)
+{
+ if(strcasecmp(s, "yes") == 0 || strcasecmp(s, "true") == 0 || strcmp(s, "1") == 0) {
+ *valret = 1;
+ return 0;
+ }
+ if(strcasecmp(s, "no") == 0 || strcasecmp(s, "false") == 0 || strcmp(s, "0") == 0) {
+ *valret = 0;
+ return 0;
+ }
+ return -1;
+}
+
+int optcfg_int_value(char *str, int *valret)
+{
+ char *endp;
+ *valret = strtol(str, &endp, 0);
+ if(endp == str) {
+ return -1;
+ }
+ return 0;
+}
+
+int optcfg_float_value(char *str, float *valret)
+{
+ char *endp;
+ *valret = strtod(str, &endp);
+ if(endp == str) {
+ return -1;
+ }
+ return 0;
+}
+
+
+
+static int get_opt(struct optcfg *oc, const char *arg, int *disable_opt)
+{
+ int i, ndashes = 0;
+
+ while(*arg && *arg == '-') {
+ ++ndashes;
+ ++arg;
+ }
+
+ if(ndashes > 2) {
+ arg -= ndashes;
+ ndashes = 0;
+ }
+
+ if(disable_opt) {
+ if(ndashes && (strstr(arg, "no-") == arg || strstr(arg, "disable-") == arg)) {
+ *disable_opt = 1;
+ arg = strchr(arg, '-') + 1; /* guaranteed to exist at this point */
+ } else {
+ *disable_opt = 0;
+ }
+ }
+
+ if(arg[1]) { /* match long options */
+ for(i=0; oc->optlist[i].opt != -1; i++) {
+ if(strcmp(arg, oc->optlist[i].s) == 0) {
+ return i;
+ }
+ }
+ } else {
+ for(i=0; oc->optlist[i].opt != -1; i++) {
+ if(arg[0] == oc->optlist[i].c) {
+ return i;
+ }
+ }
+ }
+ return -1;
+}
+
+static char *skip_spaces(char *s)
+{
+ while(*s && isspace(*s)) ++s;
+ return s;
+}
+
+static void strip_comments(char *s)
+{
+ while(*s && *s != '#') ++s;
+ if(*s == '#') *s = 0;
+}
+
+static void strip_trailing_spaces(char *s)
+{
+ char *end = s + strlen(s) - 1;
+ while(end >= s && isspace(*end)) {
+ *end-- = 0;
+ }
+}
+
+static char *parse_keyval(char *line)
+{
+ char *val;
+ char *eq = strchr(line, '=');
+ if(!eq) return 0;
+
+ *eq = 0;
+ strip_trailing_spaces(line);
+ val = skip_spaces(eq + 1);
+ strip_trailing_spaces(val);
+
+ if(!*line || !*val) {
+ return 0;
+ }
+ return val;
+}
projects / cyberay / blobdiff