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CosmOS pre-alpha and launchable application versions of old programs.

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This commit is contained in:
Anachronaut
2026-08-17 15:31:49 -04:00
parent eff6902bcf
commit 91c9d49d1b
66 changed files with 5612 additions and 160 deletions
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Source/Assembler/firstPass.c
+40 -2
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@@ -155,6 +155,9 @@ int loadFile(intermediateElement **intermediateArray, char *fileName, int *inter
// fileName is a path already resolved and recorded by the caller, and the copy
// the include list owns, so element fileNames can safely point at it.
int status = NOWHERE;
// A base has to come before anything else in its segment, so this remembers whether
// that segment has had anything put in it yet.
static int segmentUsed[3] = {0, 0, 0};
int lineNumber = 1; // Line numbers start at 1.
// Open the file.
FILE *file = fopen(fileName, "r");
@@ -229,6 +232,34 @@ int loadFile(intermediateElement **intermediateArray, char *fileName, int *inter
// Set the state to DATA so we mark additional tokens for inclusion into Data Memory.
status = DATA;
break;
case KEYWORD_BASE: {
if (status != PROGRAM && status != DATA) {
fprintf(stderr, RED "Error: #Base outside the Program or Data Segment.\n There is no segment for it to be the base of.\n" RESET);
printf(" File: %s at line %d.\n", fileName, lineNumber);
exit(1);
}
if (segmentUsed[status]) {
fprintf(stderr, RED "Error: #Base after something is already in the segment.\n"
" A base says where the whole segment begins, so it has to come first.\n" RESET);
printf(" File: %s at line %d.\n", fileName, lineNumber);
exit(1);
}
(*intermediateIndex)++;
if (!readToken(&(*intermediateArray)[*intermediateIndex], file, &lineNumber)) {
fprintf(stderr, RED "Error: #Base without an address.\n" RESET);
exit(1);
}
(*intermediateArray)[*intermediateIndex].fileName = fileName;
(*intermediateArray)[*intermediateIndex].lineNumber = lineNumber;
setSegmentBase(status, readAddress(&(*intermediateArray)[*intermediateIndex], "#Base"));
(*intermediateArray)[*intermediateIndex].type = KEYWORD;
(*intermediateArray)[*intermediateIndex].byteLength = 0;
(*intermediateArray)[*intermediateIndex].destination = NOWHERE;
(*intermediateArray)[*intermediateIndex - 1].destination = NOWHERE;
(*intermediateArray)[*intermediateIndex - 1].byteLength = 0;
(*intermediateIndex)++;
continue;
}
case KEYWORD_ALIGN:
case KEYWORD_RESERVE: {
// Both take a count, and both only make sense somewhere that has a
@@ -288,8 +319,11 @@ int loadFile(intermediateElement **intermediateArray, char *fileName, int *inter
printf(" File: %s at line %d.\n", fileName, lineNumber);
exit(1);
}
// Next, check if it's a literal value.
} else if (checkIfLiteralValue(&(*intermediateArray)[*intermediateIndex])) {
// Next, check if it's a literal value. A string is never one, however it begins:
// the quotes are gone by now, so a string starting with a zero looks exactly like
// a malformed literal and used to be rejected as one.
} else if ((*intermediateArray)[*intermediateIndex].type != STRING
&& checkIfLiteralValue(&(*intermediateArray)[*intermediateIndex])) {
// We should check to make sure we have a destination for it.
if (status == NOWHERE) {
fprintf(stderr, RED "Error: Attempting to write a value to nowhere!\n Did you forget to use the #Program or #Data keyword?\n" RESET);
@@ -320,6 +354,10 @@ int loadFile(intermediateElement **intermediateArray, char *fileName, int *inter
}
}
(*intermediateArray)[*intermediateIndex].destination = status;
if ((status == PROGRAM || status == DATA)
&& (*intermediateArray)[*intermediateIndex].type != KEYWORD) {
segmentUsed[status] = 1;
}
(*intermediateIndex)++;
}
return 0;