--- /dev/null
+#include "ccan_tokenizer.h"
+
+static char *strdup_rng(const char *s, const char *e) {
+ char *ret = malloc(e-s+1);
+ memcpy(ret, s, e-s);
+ ret[e-s] = 0;
+ return ret;
+}
+
+#define MESSAGE_PATH "tokenize/read_cstring/"
+
+//Reads a C string starting at s until quoteChar is found or e is reached
+// Returns the pointer to the terminating quote character or e if none was found
+char *read_cstring(array_char *out, const char *s, const char *e, char quoteChar, tok_message_queue *mq) {
+ const char * const tokstart = s;
+ const char *p;
+ int has_endquote=0, has_newlines=0;
+
+ //tok_msg_debug(called, s, "Called read_cstring on `%s`", s);
+
+ #define append(startptr,endptr) array_append_items(*out, startptr, (endptr)-(startptr))
+ #define append_char(theChar) array_append(*out, theChar)
+ #define append_zero() do {array_append(*out, 0); out->size--;} while(0)
+
+ p = s;
+ while (p<e) {
+ char c = *p++;
+ if (c == '\\') {
+ append(s, p-1);
+ s = p;
+ if (p >= e) {
+ append_char('\\');
+ tok_msg_error(ended_in_backslash, p-1,
+ "read_cstring input ended in backslash");
+ break;
+ }
+ c = *p++;
+ if (c>='0' && c<='9') {
+ unsigned int octal = c-'0';
+ size_t digit_count = 0;
+ while (p<e && *p>='0' && *p<='9') {
+ octal <<= 3;
+ octal += (*p++) - '0';
+ if (++digit_count >= 2)
+ break;
+ }
+ if (p<e && *p>='0' && *p<='9') {
+ tok_msg_info(ambiguous_octal, s-2,
+ "Octal followed by digit");
+ }
+ if (octal > 0xFF) {
+ tok_msg_warn(octal_overflow, s-2,
+ "Octal out of range");
+ }
+ c = octal;
+ } else {
+ switch (c) {
+ case 'x': {
+ size_t digit_count = 0;
+ size_t zero_count = 0;
+ unsigned int hex = 0;
+ while (p<e && *p=='0') p++, zero_count++;
+ for (;p<e;digit_count++) {
+ c = *p++;
+ if (c>='0' && c<='9')
+ c -= '0';
+ else if (c>='A' && c<='F')
+ c -= 'A'-10;
+ else if (c>='a' && c<='f')
+ c -= 'a'-10;
+ else {
+ p--;
+ break;
+ }
+ hex <<= 4;
+ hex += c;
+ }
+ if (zero_count+digit_count > 2) {
+ char *hex_string = strdup_rng(s-2, p);
+ tok_msg_warn(ambiguous_hex, s-2,
+ "Hex escape '%s' is ambiguous", hex_string);
+ if (digit_count > 2)
+ tok_msg_warn(hex_overflow, s-2,
+ "Hex escape '%s' out of range", hex_string);
+ free(hex_string);
+ }
+ c = hex & 0xFF;
+ } break;
+ case 'a':
+ c=0x7;
+ break;
+ case 'b':
+ c=0x8;
+ break;
+ case 'e':
+ c=0x1B;
+ break;
+ case 'f':
+ c=0xC;
+ break;
+ case 'n':
+ c=0xA;
+ break;
+ case 'r':
+ c=0xD;
+ break;
+ case 't':
+ c=0x9;
+ break;
+ case 'v':
+ c=0xB;
+ break;
+ case '\\':
+ break;
+ default:
+ if (c == quoteChar)
+ break;
+ if (c=='\'' && quoteChar=='"') {
+ /* tok_msg_info(escaped_single_quote, s-2,
+ "Single quote characters need not be escaped within double quotes"); */
+ break;
+ }
+ if (c=='"' && quoteChar=='\'') {
+ /* tok_msg_info(escaped_double_quote, s-2,
+ "Double quote characters need not be escaped within single quotes"); */
+ break;
+ }
+ tok_msg_warn(unknown_escape, s-2,
+ "Unknown escape sequence '\\%c'", c);
+ break;
+ }
+ }
+ s = p;
+ append_char(c);
+ } else if (c == quoteChar) {
+ p--;
+ has_endquote = 1;
+ break;
+ } else if (creturn(c)) {
+ has_newlines = 1;
+ }
+ }
+ append(s, p);
+ append_zero();
+ if (!has_endquote) {
+ tok_msg_error(missing_endquote, tokstart,
+ "Missing endquote on %s literal",
+ quoteChar=='\'' ? "character" : "string");
+ } else if (has_newlines) {
+ tok_msg_warn(quote_newlines, tokstart,
+ "%s literal contains newline character(s)",
+ quoteChar=='\'' ? "Character" : "String");
+ }
+ return (char*)p;
+
+ #undef append
+ #undef append_char
+ #undef append_zero
+}
+
+#undef MESSAGE_PATH
projects / ccan / blobdiff