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| author | P. J. McDermott <pj@pehjota.net> | 2016-02-27 18:29:41 (EST) |
|---|---|---|
| committer | P. J. McDermott <pj@pehjota.net> | 2016-02-27 18:29:41 (EST) |
| commit | 56eef91884524dfdfc4e2c227f323150996340dd (patch) | |
| tree | 512c42ee13fec57a21991583a3d8d447ed93fcff /eshtrans | |
| parent | 3fabff2df0215812a042ee70b4708b63be8a4fd0 (diff) | |
| download | eggshell-56eef91884524dfdfc4e2c227f323150996340dd.zip eggshell-56eef91884524dfdfc4e2c227f323150996340dd.tar.gz eggshell-56eef91884524dfdfc4e2c227f323150996340dd.tar.bz2 | |
eshtrans/frontend: Fix ungetc code and run_sublexer()
Diffstat (limited to 'eshtrans')
| -rw-r--r-- | eshtrans/frontend/lexer.esh | 63 |
1 files changed, 24 insertions, 39 deletions
diff --git a/eshtrans/frontend/lexer.esh b/eshtrans/frontend/lexer.esh index 0b628a6..e0f703c 100644 --- a/eshtrans/frontend/lexer.esh +++ b/eshtrans/frontend/lexer.esh @@ -96,12 +96,21 @@ lgetc() fi } +lungetc() +{ + lbufi=$((${lbufi} - 2)) + eval "c=\${lbufv_${lbufi}}" + lbufi=$((${lbufi} + 1)) +} + lsetc() { if [ ${lbufi} -ge ${lbufc} ]; then c='' else + lbufi=$((${lbufi} - 1)) eval "c=\${lbufv_${lbufi}}" + lbufi=$((${lbufi} + 1)) fi } @@ -150,7 +159,8 @@ next() continue ;; esac - next_word \\ + lungetc + next_word return ;; '#') @@ -213,7 +223,8 @@ next() return ;; *) - next_word '' + lungetc + next_word return ;; esac @@ -367,11 +378,9 @@ next_io() next_word() { - local prev_c="${1}" - shift 1 local res= - if ! res="$(scan_word false "${prev_c}")"; then + if ! res="$(scan_word false)"; then exit 1 fi ln_off=${res%%${RS}*} @@ -406,8 +415,7 @@ next_word() scan_word() { local in_param="${1}" - local prev_c="${2}" - shift 2 + shift 1 local lines= local word= local quoted= @@ -418,15 +426,6 @@ scan_word() word='' quoted=false - # Sort of a localized ungetc(). - case "${prev_c}" in - '') ;; - *) - tmp_c="${c}" - c="${prev_c}" - ;; - esac - while :; do #dbg "parsing word char '$c' at lineno $lineno" case "${c}" in @@ -458,10 +457,7 @@ scan_word() fi ;; esac - case "${prev_c}" in - '') lgetc;; - *) c="${tmp_c}"; prev_c='';; - esac + lgetc if ! res="$(scan_wordexp)"; then exit 1 fi @@ -488,10 +484,7 @@ scan_word() \\) #dbg 'first backslash in word' word="${word}${c}" - case "${prev_c}" in - '') lgetc;; - *) c="${tmp_c}"; prev_c='';; - esac + lgetc #dbg "next char: '$c'" case "${c}" in '') # Bash, ksh93, mksh, and zsh ignore a @@ -510,17 +503,11 @@ scan_word() \') word="${word}${c}" if ${quoted}; then - case "${prev_c}" in - '') lgetc;; - *) c="${tmp_c}"; prev_c='';; - esac + lgetc continue fi while :; do - case "${prev_c}" in - '') lgetc;; - *) c="${tmp_c}"; prev_c='';; - esac + lgetc word="${word}${c}" case "${c}" in '') @@ -556,10 +543,7 @@ scan_word() word="${word}${c}" ;; esac - case "${prev_c}" in - '') lgetc;; - *) c="${tmp_c}"; prev_c='';; - esac + lgetc done if ${quoted}; then @@ -592,7 +576,7 @@ scan_wordexp() # Command substitution if ! res="$(run_sublexer "sub${fname}" \ ${lineno} "${start}" \ - "${c}")"; then + ${lbufi})"; then exit 1 fi lbufi="${res##*${RS}}" @@ -859,7 +843,7 @@ run_sublexer() local fn="${1}" local ln="${2}" local st="${3}" - local ch="${4}" + local i="${4}" shift 4 # Initialize global variables. @@ -870,7 +854,8 @@ run_sublexer() here_awaiting_end=false here_awaiting_word=false - c="${ch}" + lbufi="${i}" + lsetc next #dbg=true |