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Momo: stack machine, part 1
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tildearrow
parent
118103b8af
commit
2320106f73
2 changed files with 258 additions and 13 deletions
264
src/momo/momo.c
264
src/momo/momo.c
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@ -37,7 +37,7 @@ static char curLocale[64];
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static char tempPath[4096];
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enum StackInstruction {
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MOMO_STACK_EXIT=0,
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MOMO_STACK_END=0,
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MOMO_STACK_PUSH,
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MOMO_STACK_PUSH_N,
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MOMO_STACK_ADD,
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@ -53,13 +53,19 @@ enum StackInstruction {
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MOMO_STACK_CMP_LE,
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MOMO_STACK_CMP_AND,
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MOMO_STACK_CMP_OR,
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MOMO_STACK_TRUE,
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MOMO_STACK_FALSE
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MOMO_STACK_BEQ,
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MOMO_STACK_BNE,
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MOMO_STACK_EXIT,
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};
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static const char* stackInsNames[]={
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"end", "push", "push n", "add", "sub", "mul", "div", "mod", "cmp eq", "cmp ne",
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"cmp gt", "cmp lt", "cmp ge", "cmp le", "cmp and", "cmp or", "beq", "bne", "exit"
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};
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struct StackData {
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unsigned char ins;
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unsigned char param;
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unsigned int param;
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};
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struct LocaleDomain {
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@ -102,6 +108,7 @@ unsigned int runStackMachine(struct StackData* data, size_t count, unsigned int
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unsigned int op1, op2;
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switch (data[pc].ins) {
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case MOMO_STACK_END:
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case MOMO_STACK_EXIT:
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return stack[sp];
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break;
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@ -178,13 +185,13 @@ unsigned int runStackMachine(struct StackData* data, size_t count, unsigned int
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op1=stack[sp--];
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stack[++sp]=(op1 || op2)?1:0;
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break;
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case MOMO_STACK_TRUE:
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case MOMO_STACK_BEQ:
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op1=stack[sp--];
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if (op1) return param;
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if (op1) pc+=(int)param;
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break;
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case MOMO_STACK_FALSE:
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case MOMO_STACK_BNE:
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op1=stack[sp--];
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if (!op1) return param;
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if (!op1) pc+=(int)param;
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break;
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default:
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return 0;
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@ -195,16 +202,226 @@ unsigned int runStackMachine(struct StackData* data, size_t count, unsigned int
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return stack[sp];
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}
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unsigned char compileExprSub(const char** ptr, struct StackData* data, size_t* pc, size_t count) {
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#define FINISH_OP \
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/* push identifier */ \
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if (curIdent[0]) { \
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if (strcmp(curIdent,"n")==0) { \
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data[*pc].ins=MOMO_STACK_PUSH_N; \
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data[*pc].param=0; \
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printf("PENDING IDENT: %s\n",curIdent); \
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} else { \
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data[*pc].ins=MOMO_STACK_PUSH; \
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printf("PENDING IDENT: %s\n",curIdent); \
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if (sscanf(curIdent,"%u",&data[*pc].param)!=1) { \
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printf("ERROR: invalid identifier %s\n",curIdent); \
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return 3; \
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} \
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} \
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(*pc)++; \
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} \
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\
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/* push operation if pending */ \
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if (curOp[0]) { \
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printf("PENDING OP: %s\n",curOp); \
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if (strcmp(curOp,"+")==0) { \
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data[*pc].ins=MOMO_STACK_ADD; \
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data[*pc].param=0; \
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(*pc)++; \
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} else if (strcmp(curOp,"-")==0) { \
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data[*pc].ins=MOMO_STACK_SUB; \
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data[*pc].param=0; \
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(*pc)++; \
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} else if (strcmp(curOp,"*")==0) { \
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data[*pc].ins=MOMO_STACK_MUL; \
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data[*pc].param=0; \
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(*pc)++; \
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} else if (strcmp(curOp,"/")==0) { \
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data[*pc].ins=MOMO_STACK_DIV; \
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data[*pc].param=0; \
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(*pc)++; \
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} else if (strcmp(curOp,"%")==0) { \
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data[*pc].ins=MOMO_STACK_MOD; \
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data[*pc].param=0; \
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(*pc)++; \
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} else if (strcmp(curOp,"&&")==0) { \
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data[*pc].ins=MOMO_STACK_CMP_AND; \
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data[*pc].param=0; \
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(*pc)++; \
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} else if (strcmp(curOp,"||")==0) { \
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data[*pc].ins=MOMO_STACK_CMP_OR; \
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data[*pc].param=0; \
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(*pc)++; \
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} else if (strcmp(curOp,">")==0) { \
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data[*pc].ins=MOMO_STACK_CMP_GT; \
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data[*pc].param=0; \
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(*pc)++; \
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} else if (strcmp(curOp,"<")==0) { \
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data[*pc].ins=MOMO_STACK_CMP_LT; \
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data[*pc].param=0; \
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(*pc)++; \
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} else if (strcmp(curOp,">=")==0) { \
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data[*pc].ins=MOMO_STACK_CMP_GE; \
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data[*pc].param=0; \
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(*pc)++; \
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} else if (strcmp(curOp,"<=")==0) { \
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data[*pc].ins=MOMO_STACK_CMP_LE; \
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data[*pc].param=0; \
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(*pc)++; \
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} else if (strcmp(curOp,"<=")==0) { \
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} else if (strcmp(curOp,"==")==0) { \
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data[*pc].ins=MOMO_STACK_CMP_EQ; \
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data[*pc].param=0; \
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(*pc)++; \
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} else if (strcmp(curOp,"!=")==0) { \
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data[*pc].ins=MOMO_STACK_CMP_NE; \
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data[*pc].param=0; \
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(*pc)++; \
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} else { \
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printf("ERROR: invalid operation\n"); \
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return 4; \
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} \
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} \
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\
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memset(curOp,0,8); \
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curOpLen=0;
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// errors:
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// 0: success
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// 1: identifier too long
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// 2: operator too long
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// 3: unknown identifier
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// 4: unknown operation
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// 5: program too long
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unsigned char compileExprSub(const char** ptr, struct StackData* data, size_t* pc, size_t count) {
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unsigned char isOp=0;
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unsigned char oldIsOp=0;
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char curIdent[32];
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char curOp[8];
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unsigned char curIdentLen=0;
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unsigned char curOpLen=0;
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unsigned char startBranch=0;
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memset(curIdent,0,32);
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memset(curOp,0,8);
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for (; *(*ptr); (*ptr)++) {
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char next=**ptr;
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unsigned char doNotPush=0;
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printf("%c\n",next);
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if (curIdentLen>30) return 1;
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if (curOpLen>6) return 2;
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if (*pc>=count) return 5;
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switch (next) {
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case '+':
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isOp=1;
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break;
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case '-':
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isOp=1;
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break;
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case '*':
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isOp=1;
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break;
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case '/':
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isOp=1;
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break;
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case '%':
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isOp=1;
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break;
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case '!':
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isOp=1;
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break;
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case '=':
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isOp=1;
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break;
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case '|':
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isOp=1;
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break;
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case '&':
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isOp=1;
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break;
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case '>':
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isOp=1;
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break;
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case '<':
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isOp=1;
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break;
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case '?':
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// special case
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startBranch=1;
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doNotPush=1;
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isOp=1;
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break;
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case ':':
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// special case
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doNotPush=1;
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startBranch=2;
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isOp=1;
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break;
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case '(':
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// special case
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doNotPush=1;
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break;
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case ')':
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// special case
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doNotPush=1;
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break;
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case ' ':
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// ignore
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doNotPush=1;
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break;
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default:
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isOp=0;
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break;
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}
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if (isOp!=oldIsOp) {
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oldIsOp=isOp;
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if (isOp) {
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printf("OP MODE\n");
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FINISH_OP;
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} else {
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printf("IDENT MODE\n");
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// prepare
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memset(curIdent,0,32);
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curIdentLen=0;
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}
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}
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if (!doNotPush) {
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if (isOp) {
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curOp[curOpLen++]=next;
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} else {
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curIdent[curIdentLen++]=next;
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}
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}
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if (startBranch) {
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printf("START BRANCH: %d\n",startBranch);
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if (startBranch==2) {
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data[*pc].ins=MOMO_STACK_EXIT;
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data[*pc].param=0;
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} else {
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data[*pc].ins=MOMO_STACK_BEQ;
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// TODO offset
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data[*pc].param=0;
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}
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startBranch=0;
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(*pc)++;
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}
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}
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if (!isOp) {
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FINISH_OP;
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}
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return 0;
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}
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unsigned char compileExpr(const char* expr, struct StackData* data, size_t count) {
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plural=(n%10==1 && n%100!=11 ? 0 : n%10>=2 && n%10<=4 && (n%100<10 || n%100>=20) ? 1 : 2);
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//plural=(n%10==1 && n%100!=11 ? 0 : n%10>=2 && n%10<=4 && (n%100<10 || n%100>=20) ? 1 : 2);
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const char* ptr=expr;
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size_t pc=0;
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printf("compiling expression... %s\n",expr);
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return compileExprSub(&ptr,data,&pc,count);
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}
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@ -481,6 +698,33 @@ const char* momo_bindtextdomain(const char* domainName, const char* dirName) {
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newDomain->firstString[curChar]=newDomain->stringCount;
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curChar++;
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}
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// compile plural program
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char pluralProgram[4096];
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const char* pluralProgramLoc=strstr(newDomain->transPtr[0],"plural=");
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if (pluralProgramLoc!=NULL) {
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pluralProgramLoc+=7;
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const char* pluralProgramLocEnd=strstr(pluralProgramLoc,";");
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if (pluralProgramLocEnd!=NULL) {
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memset(pluralProgram,0,4096);
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for (size_t i=0; i<4096 && pluralProgramLoc<pluralProgramLocEnd; pluralProgramLoc++) {
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pluralProgram[i++]=*pluralProgramLoc;
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}
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unsigned char exprRet=compileExpr(pluralProgram,newDomain->pluralProgram,256);
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if (exprRet==0) {
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// dump program
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printf("compiled program:\n");
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for (int i=0; i<256; i++) {
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printf("%s %u\n",stackInsNames[newDomain->pluralProgram[i].ins],newDomain->pluralProgram[i].param);
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if (newDomain->pluralProgram[i].ins==0) break;
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}
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} else {
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printf("error %d\n",exprRet);
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}
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}
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}
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}
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// add to domain list
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@ -5,7 +5,7 @@ the following document describes the stack machine used to get the correct plura
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```
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op | description
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---|--------------------
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00 | exit
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00 | end
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01 | push imm
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02 | push N
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03 | add
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@ -21,6 +21,7 @@ op | description
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0d | cmp le
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0e | cmp and
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0f | cmp or
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10 | true imm
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11 | false imm
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10 | beq off
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11 | bne off
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12 | exit
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```
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