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authorTavian Barnes <tavianator@gmail.com>2009-10-28 18:57:31 -0400
committerTavian Barnes <tavianator@gmail.com>2009-10-28 18:57:31 -0400
commit8ce6029a6a14c0ef003c88cb9fb29e522c022f9c (patch)
tree4720666135b504097ba49644612b53bbd106bb7f /dimension
parent9335c34a93f66318c5d4aaaca4b11595d349421d (diff)
downloaddimension-8ce6029a6a14c0ef003c88cb9fb29e522c022f9c.tar.xz
Tokenize strings and language directives.
Diffstat (limited to 'dimension')
-rw-r--r--dimension/tokenize.c143
-rw-r--r--dimension/tokenize.h7
2 files changed, 147 insertions, 3 deletions
diff --git a/dimension/tokenize.c b/dimension/tokenize.c
index 8401dc7..97b26be 100644
--- a/dimension/tokenize.c
+++ b/dimension/tokenize.c
@@ -121,7 +121,7 @@ dmnsn_tokenize_label(char *map, size_t size, dmnsn_token *token,
++i;
++*col;
++*next;
- } while (*next - map < size && (isalnum(**next) || **next == '_'));
+ } while (*next - map < size && (isalnum(**next) || **next == '_'));
token->value[i] = '\0';
@@ -146,6 +146,113 @@ dmnsn_tokenize_label(char *map, size_t size, dmnsn_token *token,
return 0;
}
+/* Tokenize a language directive (#include, #declare, etc.) */
+static int
+dmnsn_tokenize_directive(char *map, size_t size, dmnsn_token *token,
+ char **next, unsigned int *line, unsigned int *col)
+{
+ unsigned int i = 0, alloc = 32;
+
+ if (**next != '#') {
+ return 1;
+ }
+
+ char *directive = malloc(alloc);
+
+ do {
+ if (i + 1 >= alloc) {
+ alloc *= 2;
+ directive = realloc(directive, alloc);
+ }
+
+ directive[i] = **next;
+
+ ++i;
+ ++*col;
+ ++*next;
+ } while (*next - map < size && (isalnum(**next) || **next == '_'));
+
+ directive[i] = '\0';
+
+ /* Now check if we really found a directive */
+
+#define dmnsn_directive(str, tp) \
+ do { \
+ if (strcmp(directive, str) == 0) { \
+ free(directive); \
+ token->type = tp; \
+ return 0; \
+ } \
+ } while (0)
+
+ dmnsn_directive("#include", DMNSN_INCLUDE);
+ dmnsn_directive("#declare", DMNSN_DECLARE);
+
+ free(directive);
+ return 1;
+}
+
+/* Tokenize a string */
+static int
+dmnsn_tokenize_string(char *map, size_t size, dmnsn_token *token,
+ char **next, unsigned int *line, unsigned int *col)
+{
+ unsigned int i = 0, alloc = 32;
+
+ if (**next != '"') {
+ return 1;
+ }
+
+ token->type = DMNSN_STRING;
+ token->value = malloc(alloc);
+
+ ++*next;
+ while (*next - map < size && **next != '"') {
+ if (i + 1 >= alloc) {
+ alloc *= 2;
+ token->value = realloc(token->value, alloc);
+ }
+
+ if (**next == '\\') {
+ ++*col;
+ ++*next;
+
+ switch (**next) {
+ case '\\':
+ token->value[i] = '\\';
+ break;
+
+ case '"':
+ token->value[i] = '"';
+ break;
+
+ case 'n':
+ token->value[i] = '\n';
+ break;
+
+ default:
+ fprintf(stderr,
+ "Warning: unrecognised escape sequence '\\%c'"
+ " on line %u, column %u\n",
+ (int)**next, *line, *col);
+ token->value[i] = **next;
+ break;
+ }
+ } else {
+ token->value[i] = **next;
+ }
+
+ ++i;
+ ++*col;
+ ++*next;
+ }
+ ++*next;
+
+ token->value[i] = '\0';
+
+ return 0;
+}
+
dmnsn_array *
dmnsn_tokenize(FILE *file)
{
@@ -250,14 +357,37 @@ dmnsn_tokenize(FILE *file)
}
break;
+ case '#':
+ /* Language directive */
+ if (dmnsn_tokenize_directive(map, size, &token,
+ &next, &line, &col) == 0) {
+ if (token.type == DMNSN_INCLUDE) {
+ }
+ } else {
+ fprintf(stderr, "Invalid directive on line %u, column %u.\n",
+ line, col);
+ goto bailout;
+ }
+ break;
+
+ case '"':
+ if (dmnsn_tokenize_string(map, size, &token, &next, &line, &col) != 0) {
+ fprintf(stderr, "Invalid string on line %u, column %u.\n",
+ line, col);
+ goto bailout;
+ }
+ break;
+
default:
if (dmnsn_tokenize_label(map, size, &token, &next, &line, &col) != 0) {
/* Unrecognised character */
fprintf(stderr,
- "Unrecognized character 0x%X in input at line %u, column %u.\n",
- (unsigned int)*next, line, col);
+ "Unrecognized character '%c' (0x%X) in input at line %u,"
+ " column %u.\n",
+ (int)*next, (unsigned int)*next, line, col);
goto bailout;
}
+ break;
}
dmnsn_array_push(tokens, &token);
@@ -351,6 +481,13 @@ dmnsn_token_name(dmnsn_token_type token_type)
dmnsn_token_map(DMNSN_SPHERE, "sphere");
dmnsn_token_map(DMNSN_BOX, "box");
+ /* Directives */
+ dmnsn_token_map(DMNSN_INCLUDE, "#include");
+ dmnsn_token_map(DMNSN_DECLARE, "#declare");
+
+ /* Strings */
+ dmnsn_token_map(DMNSN_STRING, "string");
+
/* Identifiers */
dmnsn_token_map(DMNSN_IDENTIFIER, "identifier");
diff --git a/dimension/tokenize.h b/dimension/tokenize.h
index 2e82f98..cc8148f 100644
--- a/dimension/tokenize.h
+++ b/dimension/tokenize.h
@@ -45,8 +45,15 @@ typedef enum {
DMNSN_SPHERE,
DMNSN_BOX,
+ /* Directives (#declare, etc.) */
+ DMNSN_INCLUDE, /* Only used internally */
+ DMNSN_DECLARE,
+
/* Identifiers */
DMNSN_IDENTIFIER,
+
+ /* Strings */
+ DMNSN_STRING,
} dmnsn_token_type;
typedef struct dmnsn_token dmnsn_token;