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Updated README.md, and common.c.
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common.c had some old left over dev notes.
This commit is contained in:
Benjamin
2026-07-10 19:23:10 -04:00
parent a01858615d
commit 5bd3be3824
2 changed files with 5 additions and 5 deletions
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2
README.md
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@@ -302,7 +302,7 @@ gcc -m32 main.c common.o -o program
``` ```
. .
├── common.c # Compiler source (2000 LOC) ├── common.c # Compiler source (2000 LOC)
├── commonl # Linker ├── commonl # Linker Script
├── Makefile # Build automation ├── Makefile # Build automation
├── run_tests.sh # Quick test script ├── run_tests.sh # Quick test script
│ │

8
common.c
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@@ -46,7 +46,7 @@ typedef enum {
typedef struct { typedef struct {
TKind kind; TKind kind;
char str[512]; /* identifier / string value — 512 to match str_val */ char str[512]; /* identifier / string value — 512 to match str_val */
int slen; /* FIX(bug2+3): explicit byte count for str, excl. terminator */ int slen; /* explicit byte count for str, excl. terminator */
long num; /* numeric value */ long num; /* numeric value */
int line; /* source line where token starts */ int line; /* source line where token starts */
} Token; } Token;
@@ -114,7 +114,7 @@ static void next(void) {
if (c == '"') { if (c == '"') {
src_pos++; int i=0; src_pos++; int i=0;
while (src[src_pos] && src[src_pos]!='"') { while (src[src_pos] && src[src_pos]!='"') {
/* FIX(bug3): bounds check before writing into tok.str */ /* bounds check before writing into tok.str */
if (i >= 511) die("string literal too long"); if (i >= 511) die("string literal too long");
if (src[src_pos]=='\\') { if (src[src_pos]=='\\') {
src_pos++; src_pos++;
@@ -130,7 +130,7 @@ static void next(void) {
} }
if (src[src_pos]=='"') src_pos++; if (src[src_pos]=='"') src_pos++;
tok.str[i]=0; tok.str[i]=0;
tok.slen=i; /* FIX(bug2): record true byte count */ tok.slen=i; /* record true byte count */
tok.kind=TK_STR; tok.kind=TK_STR;
return; return;
} }
@@ -139,7 +139,7 @@ static void next(void) {
if (isalpha((unsigned char)c) || c=='_') { if (isalpha((unsigned char)c) || c=='_') {
int i=0; int i=0;
while (isalnum((unsigned char)src[src_pos]) || src[src_pos]=='_') { while (isalnum((unsigned char)src[src_pos]) || src[src_pos]=='_') {
/* FIX(bug3): bounds check for identifiers too */ /* bounds check for identifiers too */
if (i >= 511) die("identifier too long"); if (i >= 511) die("identifier too long");
tok.str[i++]=src[src_pos++]; tok.str[i++]=src[src_pos++];
} }