diff options
Diffstat (limited to 'tokens.c')
| -rw-r--r-- | tokens.c | 113 |
1 files changed, 58 insertions, 55 deletions
@@ -24,55 +24,58 @@ #include "private.h" -static int rofftok_dashes(const char *); -static int rofftok_special(const char *); -static int rofftok_predef(const char *); -static int rofftok_defined(const char *); +static int rofftok_dashes(const char *, int *); +static int rofftok_special(const char *, int *); +static int rofftok_predef(const char *, int *); +static int rofftok_defined(const char *, int *); static int -rofftok_defined(const char *buf) +rofftok_defined(const char *buf, int *i) { - if (0 == *buf) - return(-1); - if (0 == *(buf + 1)) + const char *p; + + if (0 == buf[*i]) return(-1); - if (0 != *(buf + 2)) + if (0 == buf[*i + 1]) return(-1); - if (0 == strcmp(buf, ">=")) + (*i)++; + p = &buf[(*i)++]; + + if (0 == memcmp(p, ">=", 2)) return(ROFFTok_Ge); - else if (0 == strcmp(buf, "<=")) + else if (0 == memcmp(p, "<=", 2)) return(ROFFTok_Le); - else if (0 == strcmp(buf, "Rq")) + else if (0 == memcmp(p, "Rq", 2)) return(ROFFTok_Rquote); - else if (0 == strcmp(buf, "Lq")) + else if (0 == memcmp(p, "Lq", 2)) return(ROFFTok_Lquote); - else if (0 == strcmp(buf, "ua")) + else if (0 == memcmp(p, "ua", 2)) return(ROFFTok_Uparrow); - else if (0 == strcmp(buf, "aa")) + else if (0 == memcmp(p, "aa", 2)) return(ROFFTok_Acute); - else if (0 == strcmp(buf, "ga")) + else if (0 == memcmp(p, "ga", 2)) return(ROFFTok_Grave); - else if (0 == strcmp(buf, "Pi")) + else if (0 == memcmp(p, "Pi", 2)) return(ROFFTok_Pi); - else if (0 == strcmp(buf, "Ne")) + else if (0 == memcmp(p, "Ne", 2)) return(ROFFTok_Ne); - else if (0 == strcmp(buf, "Le")) + else if (0 == memcmp(p, "Le", 2)) return(ROFFTok_Le); - else if (0 == strcmp(buf, "Ge")) + else if (0 == memcmp(p, "Ge", 2)) return(ROFFTok_Ge); - else if (0 == strcmp(buf, "Lt")) + else if (0 == memcmp(p, "Lt", 2)) return(ROFFTok_Lt); - else if (0 == strcmp(buf, "Gt")) + else if (0 == memcmp(p, "Gt", 2)) return(ROFFTok_Gt); - else if (0 == strcmp(buf, "Pm")) + else if (0 == memcmp(p, "Pm", 2)) return(ROFFTok_Plusmin); - else if (0 == strcmp(buf, "If")) + else if (0 == memcmp(p, "If", 2)) return(ROFFTok_Infty); - else if (0 == strcmp(buf, "Na")) + else if (0 == memcmp(p, "Na", 2)) return(ROFFTok_Nan); - else if (0 == strcmp(buf, "Ba")) + else if (0 == memcmp(p, "Ba", 2)) return(ROFFTok_Bar); return(-1); @@ -80,15 +83,14 @@ rofftok_defined(const char *buf) static int -rofftok_predef(const char *buf) +rofftok_predef(const char *buf, int *i) { - if (0 == *buf) + if (0 == buf[*i]) return(-1); + if ('(' == buf[*i]) + return(rofftok_defined(buf, i)); - if ('(' == *buf) - return(rofftok_defined(++buf)); - - switch (*buf) { + switch (buf[*i]) { case ('q'): return(ROFFTok_Quote); default: @@ -100,20 +102,17 @@ rofftok_predef(const char *buf) static int -rofftok_dashes(const char *buf) +rofftok_dashes(const char *buf, int *i) { - if (0 == *buf) + if (0 == buf[*i]) return(-1); - else if (*buf++ != 'e') + else if (buf[(*i)++] != 'e') return(-1); - - if (0 == *buf) - return(-1); - else if (0 != *(buf + 1)) + if (0 == buf[*i]) return(-1); - switch (*buf) { + switch (buf[*i]) { case ('m'): return(ROFFTok_Em); case ('n'): @@ -126,15 +125,13 @@ rofftok_dashes(const char *buf) static int -rofftok_special(const char *buf) +rofftok_special(const char *buf, int *i) { - if (0 == *buf) - return(-1); - else if (0 != *(buf + 1)) - return(-1); + if (0 == buf[*i]) + return(ROFFTok_Slash); - switch (*buf) { + switch (buf[*i]) { case ('a'): return(ROFFTok_Sp_A); case ('b'): @@ -149,6 +146,8 @@ rofftok_special(const char *buf) return(ROFFTok_Sp_T); case ('v'): return(ROFFTok_Sp_V); + case ('0'): + return(ROFFTok_Sp_0); default: break; } @@ -157,19 +156,22 @@ rofftok_special(const char *buf) int -rofftok_scan(const char *buf) +rofftok_scan(const char *buf, int *i) { assert(*buf); - if ('\\' != *buf++) - return(ROFFTok_MAX); + assert(buf[*i] == '\\'); + + (*i)++; - for ( ; *buf; buf++) { - switch (*buf) { + for ( ; buf[*i]; (*i)++) { + switch (buf[*i]) { case ('e'): - return(rofftok_special(++buf)); + (*i)++; + return(rofftok_special(buf, i)); case ('('): - return(rofftok_dashes(++buf)); + (*i)++; + return(rofftok_dashes(buf, i)); case (' '): return(ROFFTok_Space); case ('&'): @@ -177,9 +179,10 @@ rofftok_scan(const char *buf) case ('-'): return(ROFFTok_Hyphen); case ('*'): - return(rofftok_predef(++buf)); + (*i)++; + return(rofftok_predef(buf, i)); case ('\\'): - return(ROFFTok_MAX); + return(ROFFTok_Slash); default: break; } |