diff options
Diffstat (limited to 'parser.h')
| -rw-r--r-- | parser.h | 79 |
1 files changed, 79 insertions, 0 deletions
@@ -57,6 +57,85 @@ class parse_error : public error { virtual ~parse_error() throw() {} }; +/************************************************************************ + * + * General utility parsing functions + */ + +inline char * skip_ws(char * ptr) { + while (*ptr == ' ' || *ptr == '\t' || *ptr == '\n') + ptr++; + return ptr; +} + +inline char * next_element(char * buf, bool variable = false) { + for (char * p = buf; *p; p++) { + if (! (*p == ' ' || *p == '\t')) + continue; + + if (! variable) { + *p = '\0'; + return skip_ws(p + 1); + } + else if (*p == '\t') { + *p = '\0'; + return skip_ws(p + 1); + } + else if (*(p + 1) == ' ') { + *p = '\0'; + return skip_ws(p + 2); + } + } + return NULL; +} + +inline char peek_next_nonws(std::istream& in) { + char c = in.peek(); + while (! in.eof() && std::isspace(c)) { + in.get(c); + c = in.peek(); + } + return c; +} + +#define READ_INTO(str, targ, size, var, cond) { \ + char * _p = targ; \ + var = str.peek(); \ + while (! str.eof() && var != '\n' && (cond) && _p - targ < size) { \ + str.get(var); \ + if (str.eof()) \ + break; \ + if (var == '\\') { \ + str.get(var); \ + if (in.eof()) \ + break; \ + } \ + *_p++ = var; \ + var = str.peek(); \ + } \ + *_p = '\0'; \ +} + +#define READ_INTO_(str, targ, size, var, idx, cond) { \ + char * _p = targ; \ + var = str.peek(); \ + while (! str.eof() && var != '\n' && (cond) && _p - targ < size) { \ + str.get(var); \ + if (str.eof()) \ + break; \ + idx++; \ + if (var == '\\') { \ + str.get(var); \ + if (in.eof()) \ + break; \ + idx++; \ + } \ + *_p++ = var; \ + var = str.peek(); \ + } \ + *_p = '\0'; \ +} + } // namespace ledger #endif // _PARSER_H |