+ u32 getFlagStr(std::string name, FlagDesc *flagdesc, u32 *flagmask)
+ {
+ std::string val = get(name);
+ return (isdigit(val[0])) ? stoi(val) :
+ readFlagString(val, flagdesc, flagmask);
+ }
+
+ // N.B. if getStruct() is used to read a non-POD aggregate type,
+ // the behavior is undefined.
+ bool getStruct(std::string name, std::string format, void *out, size_t olen)
+ {
+ size_t len = olen;
+ std::vector<std::string *> strs_alloced;
+ std::string *str, valstr;
+ char *f, *snext;
+ size_t pos;
+
+ try {
+ valstr = get(name);
+ } catch (SettingNotFoundException &e) {
+ return false;
+ }
+
+ char *s = &valstr[0];
+ char *buf = new char[len];
+ char *bufpos = buf;
+
+ char *fmtpos, *fmt = &format[0];
+ while ((f = strtok_r(fmt, ",", &fmtpos)) && s) {
+ fmt = NULL;
+
+ bool is_unsigned = false;
+ int width = 0;
+ char valtype = *f;
+
+ width = (int)strtol(f + 1, &f, 10);
+ if (width && valtype == 's')
+ valtype = 'i';
+
+ switch (valtype) {
+ case 'u':
+ is_unsigned = true;
+ /* FALLTHROUGH */
+ case 'i':
+ if (width == 16) {
+ bufpos += PADDING(bufpos, u16);
+ if ((bufpos - buf) + sizeof(u16) <= len) {
+ if (is_unsigned)
+ *(u16 *)bufpos = (u16)strtoul(s, &s, 10);
+ else
+ *(s16 *)bufpos = (s16)strtol(s, &s, 10);
+ }
+ bufpos += sizeof(u16);
+ } else if (width == 32) {
+ bufpos += PADDING(bufpos, u32);
+ if ((bufpos - buf) + sizeof(u32) <= len) {
+ if (is_unsigned)
+ *(u32 *)bufpos = (u32)strtoul(s, &s, 10);
+ else
+ *(s32 *)bufpos = (s32)strtol(s, &s, 10);
+ }
+ bufpos += sizeof(u32);
+ } else if (width == 64) {
+ bufpos += PADDING(bufpos, u64);
+ if ((bufpos - buf) + sizeof(u64) <= len) {
+ if (is_unsigned)
+ *(u64 *)bufpos = (u64)strtoull(s, &s, 10);
+ else
+ *(s64 *)bufpos = (s64)strtoll(s, &s, 10);
+ }
+ bufpos += sizeof(u64);
+ }
+ s = strchr(s, ',');
+ break;
+ case 'b':
+ snext = strchr(s, ',');
+ if (snext)
+ *snext++ = 0;
+
+ bufpos += PADDING(bufpos, bool);
+ if ((bufpos - buf) + sizeof(bool) <= len)
+ *(bool *)bufpos = is_yes(std::string(s));
+ bufpos += sizeof(bool);
+
+ s = snext;
+ break;
+ case 'f':
+ bufpos += PADDING(bufpos, float);
+ if ((bufpos - buf) + sizeof(float) <= len)
+ *(float *)bufpos = strtof(s, &s);
+ bufpos += sizeof(float);
+
+ s = strchr(s, ',');
+ break;
+ case 's':
+ while (*s == ' ' || *s == '\t')
+ s++;
+ if (*s++ != '"') //error, expected string
+ goto fail;
+ snext = s;
+
+ while (snext[0] && !(snext[-1] != '\\' && snext[0] == '"'))
+ snext++;
+ *snext++ = 0;
+
+ bufpos += PADDING(bufpos, std::string *);
+
+ str = new std::string(s);
+ pos = 0;
+ while ((pos = str->find("\\\"", pos)) != std::string::npos)
+ str->erase(pos, 1);
+
+ if ((bufpos - buf) + sizeof(std::string *) <= len)
+ *(std::string **)bufpos = str;
+ bufpos += sizeof(std::string *);
+ strs_alloced.push_back(str);
+
+ s = *snext ? snext + 1 : NULL;
+ break;
+ case 'v':
+ while (*s == ' ' || *s == '\t')
+ s++;
+ if (*s++ != '(') //error, expected vector
+ goto fail;
+
+ if (width == 2) {
+ bufpos += PADDING(bufpos, v2f);
+
+ if ((bufpos - buf) + sizeof(v2f) <= len) {
+ v2f *v = (v2f *)bufpos;
+ v->X = strtof(s, &s);
+ s++;
+ v->Y = strtof(s, &s);
+ }
+
+ bufpos += sizeof(v2f);
+ } else if (width == 3) {
+ bufpos += PADDING(bufpos, v3f);
+ if ((bufpos - buf) + sizeof(v3f) <= len) {
+ v3f *v = (v3f *)bufpos;
+ v->X = strtof(s, &s);
+ s++;
+ v->Y = strtof(s, &s);
+ s++;
+ v->Z = strtof(s, &s);
+ }
+
+ bufpos += sizeof(v3f);
+ }
+ s = strchr(s, ',');
+ break;
+ default: //error, invalid format specifier
+ goto fail;
+ }
+
+ if (s && *s == ',')
+ s++;
+
+ if ((size_t)(bufpos - buf) > len) //error, buffer too small
+ goto fail;
+ }
+
+ if (f && *f) { //error, mismatched number of fields and values
+fail:
+ for (size_t i = 0; i != strs_alloced.size(); i++)
+ delete strs_alloced[i];
+ delete[] buf;
+ return false;
+ }
+
+ memcpy(out, buf, olen);
+ delete[] buf;
+ return true;
+ }
+
+ //////////// Try to get value, no exception thrown
+ bool getNoEx(std::string name, std::string &val)
+ {
+ try {
+ val = get(name);
+ return true;
+ } catch (SettingNotFoundException &e) {
+ return false;
+ }
+ }
+
+ // N.B. getFlagStrNoEx() does not set val, but merely modifies it. Thus,
+ // val must be initialized before using getFlagStrNoEx(). The intention of
+ // this is to simplify modifying a flags field from a default value.
+ bool getFlagStrNoEx(std::string name, u32 &val, FlagDesc *flagdesc)
+ {
+ try {
+ u32 flags, flagmask;
+
+ flags = getFlagStr(name, flagdesc, &flagmask);
+
+ val &= ~flagmask;
+ val |= flags;
+
+ return true;
+ } catch (SettingNotFoundException &e) {
+ return false;
+ }
+ }
+
+ bool getFloatNoEx(std::string name, float &val)
+ {
+ try {
+ val = getFloat(name);
+ return true;
+ } catch (SettingNotFoundException &e) {
+ return false;
+ }
+ }
+
+ bool getU16NoEx(std::string name, int &val)
+ {
+ try {
+ val = getU16(name);
+ return true;
+ } catch (SettingNotFoundException &e) {
+ return false;
+ }
+ }
+
+ bool getU16NoEx(std::string name, u16 &val)
+ {
+ try {
+ val = getU16(name);
+ return true;
+ } catch (SettingNotFoundException &e) {
+ return false;
+ }
+ }
+
+ bool getS16NoEx(std::string name, int &val)
+ {
+ try {
+ val = getU16(name);
+ return true;
+ } catch (SettingNotFoundException &e) {
+ return false;
+ }
+ }
+
+ bool getS16NoEx(std::string name, s16 &val)
+ {
+ try {
+ val = getS16(name);
+ return true;
+ } catch (SettingNotFoundException &e) {
+ return false;
+ }
+ }
+
+ bool getS32NoEx(std::string name, s32 &val)
+ {
+ try {
+ val = getS32(name);
+ return true;
+ } catch (SettingNotFoundException &e) {
+ return false;
+ }
+ }
+
+ bool getV3FNoEx(std::string name, v3f &val)
+ {
+ try {
+ val = getV3F(name);
+ return true;
+ } catch (SettingNotFoundException &e) {
+ return false;
+ }
+ }
+
+ bool getV2FNoEx(std::string name, v2f &val)
+ {
+ try {
+ val = getV2F(name);
+ return true;
+ } catch (SettingNotFoundException &e) {
+ return false;
+ }
+ }
+
+ bool getU64NoEx(std::string name, u64 &val)
+ {
+ try {
+ val = getU64(name);
+ return true;
+ } catch (SettingNotFoundException &e) {
+ return false;
+ }
+ }
+
+ //////////// Set setting
+
+ // N.B. if setStruct() is used to write a non-POD aggregate type,
+ // the behavior is undefined.
+ bool setStruct(std::string name, std::string format, void *value)
+ {
+ char sbuf[2048];
+ int sbuflen = sizeof(sbuf) - 1;
+ sbuf[sbuflen] = 0;
+ std::string str;
+ int pos = 0;
+ size_t fpos;
+ char *f;
+
+ char *bufpos = (char *)value;
+ char *fmtpos, *fmt = &format[0];
+ while ((f = strtok_r(fmt, ",", &fmtpos))) {
+ fmt = NULL;
+ bool is_unsigned = false;
+ int width = 0, nprinted = 0;
+ char valtype = *f;
+
+ width = (int)strtol(f + 1, &f, 10);
+ if (width && valtype == 's')
+ valtype = 'i';
+
+ switch (valtype) {
+ case 'u':
+ is_unsigned = true;
+ /* FALLTHROUGH */
+ case 'i':
+ if (width == 16) {
+ bufpos += PADDING(bufpos, u16);
+ nprinted = snprintf(sbuf + pos, sbuflen,
+ is_unsigned ? "%u, " : "%d, ",
+ *((u16 *)bufpos));
+ bufpos += sizeof(u16);
+ } else if (width == 32) {
+ bufpos += PADDING(bufpos, u32);
+ nprinted = snprintf(sbuf + pos, sbuflen,
+ is_unsigned ? "%u, " : "%d, ",
+ *((u32 *)bufpos));
+ bufpos += sizeof(u32);
+ } else if (width == 64) {
+ bufpos += PADDING(bufpos, u64);
+ nprinted = snprintf(sbuf + pos, sbuflen,
+ is_unsigned ? "%llu, " : "%lli, ",
+ (unsigned long long)*((u64 *)bufpos));
+ bufpos += sizeof(u64);
+ }
+ break;
+ case 'b':
+ bufpos += PADDING(bufpos, bool);
+ nprinted = snprintf(sbuf + pos, sbuflen, "%s, ",
+ *((bool *)bufpos) ? "true" : "false");
+ bufpos += sizeof(bool);
+ break;
+ case 'f':
+ bufpos += PADDING(bufpos, float);
+ nprinted = snprintf(sbuf + pos, sbuflen, "%f, ",
+ *((float *)bufpos));
+ bufpos += sizeof(float);
+ break;
+ case 's':
+ bufpos += PADDING(bufpos, std::string *);
+ str = **((std::string **)bufpos);
+
+ fpos = 0;
+ while ((fpos = str.find('"', fpos)) != std::string::npos) {
+ str.insert(fpos, 1, '\\');
+ fpos += 2;
+ }
+
+ nprinted = snprintf(sbuf + pos, sbuflen, "\"%s\", ",
+ (*((std::string **)bufpos))->c_str());
+ bufpos += sizeof(std::string *);
+ break;
+ case 'v':
+ if (width == 2) {
+ bufpos += PADDING(bufpos, v2f);
+ v2f *v = (v2f *)bufpos;
+ nprinted = snprintf(sbuf + pos, sbuflen,
+ "(%f, %f), ", v->X, v->Y);
+ bufpos += sizeof(v2f);
+ } else {
+ bufpos += PADDING(bufpos, v3f);
+ v3f *v = (v3f *)bufpos;
+ nprinted = snprintf(sbuf + pos, sbuflen,
+ "(%f, %f, %f), ", v->X, v->Y, v->Z);
+ bufpos += sizeof(v3f);
+ }
+ break;
+ default:
+ return false;
+ }
+ if (nprinted < 0) //error, buffer too small
+ return false;
+ pos += nprinted;
+ sbuflen -= nprinted;
+ }
+
+ if (pos >= 2)
+ sbuf[pos - 2] = 0;
+
+ set(name, std::string(sbuf));
+ return true;
+ }
+
+ void setFlagStr(std::string name, u32 flags,
+ FlagDesc *flagdesc, u32 flagmask)
+ {
+ set(name, writeFlagString(flags, flagdesc, flagmask));
+ }
+
projects / minetest.git / blobdiff